CN116292448B - Underground concentric tube jet pump with replaceable core and split flow - Google Patents
Underground concentric tube jet pump with replaceable core and split flow Download PDFInfo
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- CN116292448B CN116292448B CN202310229375.4A CN202310229375A CN116292448B CN 116292448 B CN116292448 B CN 116292448B CN 202310229375 A CN202310229375 A CN 202310229375A CN 116292448 B CN116292448 B CN 116292448B
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- 230000007246 mechanism Effects 0.000 claims abstract description 76
- 239000007788 liquid Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 34
- 238000005086 pumping Methods 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 13
- 238000002347 injection Methods 0.000 claims abstract description 10
- 239000007924 injection Substances 0.000 claims abstract description 10
- 230000005012 migration Effects 0.000 claims abstract description 6
- 238000013508 migration Methods 0.000 claims abstract description 6
- 230000009467 reduction Effects 0.000 claims abstract 2
- 239000012530 fluid Substances 0.000 claims description 87
- 238000000034 method Methods 0.000 claims description 55
- 230000008569 process Effects 0.000 claims description 42
- 239000011268 mixed slurry Substances 0.000 claims description 41
- 238000007789 sealing Methods 0.000 claims description 36
- 238000009792 diffusion process Methods 0.000 claims description 28
- 230000006835 compression Effects 0.000 claims description 26
- 238000007906 compression Methods 0.000 claims description 26
- 238000004891 communication Methods 0.000 claims description 25
- 230000008859 change Effects 0.000 claims description 19
- 230000009471 action Effects 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 10
- 230000001276 controlling effect Effects 0.000 claims description 6
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 2
- 238000011068 loading method Methods 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims description 2
- 230000003247 decreasing effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 4
- 230000008021 deposition Effects 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 description 21
- 239000007789 gas Substances 0.000 description 5
- NMJORVOYSJLJGU-UHFFFAOYSA-N methane clathrate Chemical compound C.C.C.C.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O NMJORVOYSJLJGU-UHFFFAOYSA-N 0.000 description 5
- 238000000605 extraction Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
- E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
- F04F5/467—Arrangements of nozzles with a plurality of nozzles arranged in series
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention discloses an underground concentric tube jet pump with replaceable core and diversion, which comprises a lock core mechanism, a core replacing mechanism and a diversion mechanism. The lock core mechanism consists of a self-locking block, a locking block and the like; the core replacing mechanism consists of a jet nozzle, a split nozzle and the like; the diversion mechanism consists of a diversion pipe, a lower joint and the like. The outer tube of lock core mechanism, upper joint and lower joint of water conservancy diversion mechanism are connected with upper and lower tubular column joint respectively, and lock core mechanism bottom and water conservancy diversion mechanism top are connected, and core mechanism that trades is in lock core mechanism and water conservancy diversion mechanism through the latch hook chucking. According to the invention, a jet lifting structure and a buckle locking structure are adopted at the same time, and pumping and lifting of the returned liquid at different degrees are realized by controlling the injection flow of the power liquid and replacing core replacing mechanisms with different inner diameters; the migration speed and the fluidity of the return liquid are improved, the rock debris deposition in the pipeline is reduced, and the phenomena of pump blocking and pipeline blocking are effectively prevented, so that the production operation efficiency and the safety are improved; and has the characteristics of convenient maintenance, energy saving, consumption reduction and high reliability.
Description
Technical Field
The invention belongs to the field of energy exploitation equipment, and particularly relates to a downhole concentric tube jet pump with a replaceable core and a split flow.
Background
In recent years, as the demand of social production and life on resources such as petroleum, natural gas and the like is increased, the exploitation depth of petroleum and natural gas resources is increased continuously, the annular pressure at the lower part of a land well is increased along with the depth, a narrow-density window exists in shallow surface drilling in deep water oil gas and hydrate development, the stratum is soft and easy to leak, the pressure in a shaft is required to be accurately regulated and controlled in the drilling process, otherwise, the well wall is easy to be unstable, lost circulation accidents occur, and the drilling efficiency is influenced; at present, methods for controlling the pressure of a shaft liquid column by configuring drilling fluid, using gas, inflating, foaming and the like are commonly adopted, but the methods have high deployment difficulty, have mutually matched process requirements and have poor applicability; according to the annular turbine suction pump provided by the prior patent CN101725543A, the drilling fluid drives the internal turbine to rotate, and drives the turbine pump blades on the outer side to rotate, so that lifting of the drilling fluid is realized, but the turbine blades are exposed outside, so that the tool cannot be used for most complex well sections, and has great limitation.
Horizontal wells and large displacement wells are currently in wide use in the field of oil, gas, shale gas and gas hydrate recovery. However, the rock debris generated in the drilling process and a large amount of sand and stones brought by oil gas flow in the production process are easily deposited on the lower well walls of horizontal wells, high-inclination wells, large-displacement wells, wells with complex structures and the like under the action of gravity, and if mixed slurry migration cannot be well realized in the daily drilling process, the flow rate of annulus return liquid is increased, and the accumulation of the rock debris or sand and stones can form a rock debris bed or sand deposit, so that the efficiency and the safety of the drilling and completion operation process are greatly influenced. The existing patent CN112482986A provides a downhole hydraulic lifting tool, drilling fluid flowing in a drill rod drives a turbine power mechanism to rotate, a turbine central shaft and a universal coupling mechanism drive a screw axial flow mechanism rotor to rotate, lifting of annular drilling fluid and migration of annular rock fragments at a horizontal section are realized, but the downhole hydraulic lifting tool is complex in structure, low in efficiency and long in service life, and pump clamping and pipeline blocking phenomena are easy to occur.
Meanwhile, by researching various pumps which can be used for underground lifting, the pump can not meet the discharge-assisting operation of reverse circulation pressure control drilling, high sand-containing oil extraction, natural gas hydrate drilling and the like after analysis, and the pump has the following defects in the application process, and is mainly characterized in that:
(1) The existing jet pump and the like can suck and lift high-sand-content mixed slurry for a long time, have faults such as erosion, abrasion, blockage and the like, seriously affect the working performance of the jet pump and the like, reduce the working efficiency, and can not split power liquid and can not install a power drilling tool, a pressure-controlled injection tool and the like at the lower part of the jet pump and the like.
(2) The existing turbine hydraulic lifting tool is complex in structure, and because the sand content of mixed liquor is often higher in the production process, the phenomena of pump blockage and pipeline blockage are very easy to occur, a large amount of manpower and material resources are consumed for shutdown maintenance, and great economic loss is caused.
(3) The existing disc pumps, multistage centrifugal pumps, plunger pumps and other electric drive pumps need cable connection and are required to be independently lowered to the sea floor or attached to a working string, so that the process is complex and the workload is high.
Therefore, in order to meet the requirements of a concentric drill rod reverse circulation pressure control drilling process, a concentric double-pipe sand discharge oil extraction process, a double-layer pipe natural gas hydrate drilling process and the like, and solve the defects of the existing underground lifting pump, a novel underground core-replaceable and flow-splitting concentric pipe jet pump is needed to be invented, underground pressure is accurately regulated and controlled, the core replacement is convenient, annulus return liquid migration speed and fluidity are improved, rock debris deposition in a pipeline is reduced, pump clamping and pipeline blocking phenomena are effectively prevented, and accordingly production operation efficiency and safety are improved.
Disclosure of Invention
(One) solving the technical problems
The invention aims to overcome the defects of the prior art and provides a downhole concentric tube jet pump with replaceable cores and split flow. The invention adopts the buckle locking type core replacing mechanism to realize the replacement of the pump core so as to solve the problems of erosion and abrasion of the pump core; the device can be directly connected to a production pipe column and drill along with the pipe column to solve the problems of complex arrangement process and large workload of the existing production lifting pump; the jet lifting structure and the buckle locking structure are adopted, and the requirements of sucking and lifting the returned liquid to different degrees and accurately regulating and controlling the underground pressure are met by controlling the injection flow of the power liquid and replacing the core replacing mechanisms with different inner diameters; by adopting the principle of negative pressure absorption, no moving component is arranged in the underground pipe column, so that the problems of pump clamping and pipeline blocking easily occur, the shutdown maintenance loss is reduced, and the service life and the reliability are improved.
(II) technical scheme
The aim of the invention is realized by the following technical scheme: an underground replaceable core and shunt concentric tube jet pump is characterized in that: the device consists of a lock core mechanism, a core changing mechanism and a diversion mechanism; Wherein the lock core mechanism consists of an outer tube 1, an upper joint 2, a self-locking communicating joint seat 3, a sealing cover 4, a lock hook 5, a return spring 6, a self-locking block 7, a self-locking block compression spring 8, a locking block 9, a locking block return spring 10 and a fastening screw 22, the self-locking communicating joint seat 3 is provided with a boss I301, a groove I302, a self-locking block hole 303, a boss II 304, a through hole I305, a suction hole 306, a boss III 307, a boss IV 308, a spring seat 309, a boss V310, a boss VI 311, a groove II 312, a screw hole 313, a boss VII 314 and a through hole II 315, the bottom end of the outer tube 1 and the bottom end of the upper joint 2 are respectively connected with the boss VII 314 and the boss I301 of the self-locking communicating joint seat 3 through threads, The sealing cover 4 is connected with a screw hole 313 of the self-locking communication joint seat 3 through a fastening screw 22, the lock hook 5 is connected with the self-locking block 7 through a reset spring 6, the self-locking block 7 is connected with a boss VI 311 of the self-locking communication joint seat 3 through a self-locking block compression spring 8, the lock block 9 is connected with a boss V310 of the self-locking communication joint seat 3 through threads, and the bottom end of the lock block 9 is connected with a spring seat 309 of the self-locking communication joint seat 3 through a lock block reset spring 10; The core changing mechanism consists of a venturi tube diffusion tube 11, a connecting tube 12, a jet nozzle 13, a rubber sealing ring I14, a nozzle connecting tube 15, a shunt nozzle 18 and a rubber sealing ring II 19, wherein a rectangular hole 15-1 which is uniformly distributed in the circumferential direction is arranged at the middle tube section of the nozzle connecting tube 15 and is used for enabling power fluid to flow into the nozzle connecting tube 15 from a water inlet outer tube 16, the top end of the venturi tube diffusion tube 11 is connected with a self-locking block 7 through a lock hook 5, the bottom end of the venturi tube diffusion tube 11 is connected with the top end of the connecting tube 12 through threads, the bottom end of the connecting tube 12 is connected with the top end of the jet nozzle 13 through threads, the rubber sealing ring I14 is arranged outside the bottom end of the jet nozzle 13, The top end of the nozzle connecting pipe 15 is connected with the inner side of the bottom end of the jet nozzle 13 through threads, the bottom end of the nozzle connecting pipe 15 is connected with the inner side of the top end of the split nozzle 18 through threads, and a rubber sealing ring II 19 is arranged on the outer side of the top end of the split nozzle 18; the diversion mechanism consists of an outer water inlet pipe 16, a diversion pipe 17, a supporting spring 20 and a lower joint 21, wherein the lower joint 21 is provided with a boss VIII 2101, a boss IX 2102, a through hole III 2103, a boss X2104 and a boss XI 2105, the middle pipe section of the outer water inlet pipe 16 is provided with a plurality of key slot type holes 16-1 for the circulation of power fluid, the top end of the outer water inlet pipe 16 is in threaded connection with a boss III 307 of the self-locking communication joint seat 3, the bottom end of the outer water inlet pipe 16 is in threaded connection with a boss VIII 2101 of the lower joint 21, the top end of the diversion pipe 17 is in threaded connection with a boss IV 308 of the self-locking communication joint seat 3, The bottom end of the flow guide pipe 17 is connected with a boss XI 2105 of the lower joint 21 through threads, the bottom end of the flow dividing nozzle 18 is connected with the lower joint 21 through a supporting spring 20, and the bottom end of the supporting spring 20 is fixed on a boss X2104 of the lower joint 21.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top ends of the outer pipe 1 and the upper joint 2 are respectively provided with threads for connecting a top pipe column.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the two sides of the self-locking communication joint seat 3 are provided with through holes II 315 distributed circumferentially for the power fluid to flow to the flow guiding mechanism; the middle is provided with a through hole I305 for installing a core changing mechanism; the bottom end is provided with circumferentially distributed suction holes 306 for circulation of the mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the outside of the sealing cover 4 is provided with counter sunk holes 4-1 which are distributed in a linear and symmetrical way and are used for installing fastening screws 22; the top end of the inner side is provided with a latch hook platform 4-2 for releasing the core replacing mechanism by a latch hook 5.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the lock hook 5 is provided with a clamping hook for clamping the venturi tube diffusion tube 11; the bottom end is provided with a slotted hole for installing a return spring 6.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the self-locking block 7 is provided with a through hole IV 701, a compression spring hole 702, a core changing table 703, a gradual change step 704 and a suction table 705, wherein the through hole IV 701 is used for installing a return spring 6; the compression spring hole 702 is used for installing a self-locking block compression spring 8; gradual step 704 is a step-down step.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the locking block 9 is provided with a cylindrical rod which can move along the gradual change step 704 of the self-locking block 7; a threaded hole is arranged in the middle and is used for being connected with a boss V310 of the self-locking communication joint seat 3; the bottom end is provided with a slotted hole 9-1 for connecting a locking piece reset spring 10.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the inside of the throat diffusion tube 11 is provided with a throat channel 11-1, and the bottom end of the throat channel 11-1 is provided with a mixing tube for momentum exchange between the power liquid and the mixed slurry to form a returned liquid; the top end of the throat pipe channel 11-1 is provided with a diffusion pipe 11-2, which plays a role in decelerating and boosting the returned liquid.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the middle pipe section of the connecting pipe 12 is in a fence shape 12-1 and is used for circulating mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the jet nozzle 13 and the shunt nozzle 18 are respectively provided with a plurality of grooves III 13-1 and grooves IV 18-1 which are respectively used for installing a rubber sealing ring I14 and a rubber sealing ring II 19.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the bottom end of the lower joint 21 is provided with a boss IX 2102 for connecting with a bottom pipe column.
A pumping lifting method of an underground replaceable core and shunt concentric tube jet pump is characterized by comprising the following steps of: when the production operation is carried out, the working procedures can be divided into a power fluid pressurizing process, a power fluid injection process, a power fluid diversion process and a mixed slurry lifting process, and the steps are as follows:
s1, a power fluid pressurizing process: the tool is connected into the underground device combination, the frequency conversion control cabinet on the ground controls the flow of power fluid by controlling the rotating speed of the ground pump, the pumping lifting speed of mixed slurry can be regulated, the output of returned fluid is further controlled, and the power fluid reaches the annulus between the outer tube 1 and the upper joint 2 through the upper tubular column of the tool after being pressurized by the ground pump;
S2, a power fluid injection process: the high-pressure power fluid enters the annulus between the water inlet outer tube 16 and the flow guide tube 17 through a through hole II 315 of the self-locking communication joint seat 3 from the annulus between the outer tube 1 and the upper joint 2, and then sequentially passes through a key slot hole of the middle tube section of the water inlet outer tube 16 and holes uniformly distributed in the circumferential direction of the middle tube section of the nozzle connecting tube 15 to reach the inside of the nozzle connecting tube 15;
S3, a power fluid diversion process: the high-pressure power fluid is split in the nozzle connecting pipe 15, and a part of the power fluid moves downwards to enter the split nozzle 18 and enters the lower pipe column through the through hole III 2103 of the lower joint 21;
s4, lifting the mixed slurry: the other part of the power liquid which is split by the nozzle connecting pipe 15 moves upwards to enter the jet nozzle 13, negative pressure is generated at the nozzle of the jet nozzle 13, the mixed slurry is sucked into the throat pipe diffuser pipe 11 through the fence of the middle pipe section of the connecting pipe 12, the power liquid and the mixed slurry are mixed to form a returned liquid, the returned liquid is decelerated and pressurized and then enters the upper joint 2, the returned liquid enters the pipe column at the upper part of the tool, and reaches the ground through the pipe column migration, so that sand removal, oil-gas-liquid separation and purification are performed, and the mixed slurry is circularly reciprocated, thereby realizing high-efficiency production operation.
A core changing method of a downhole core-changeable and split concentric tube jet pump is characterized by comprising the following steps of: when the core replacing operation is carried out, the working procedures of the core replacing device can be divided into a power liquid pumping-in process, a lock hook unlocking process, an old core taking-out process and a core replacing and loading process, and the steps are as follows:
S1, a power liquid pumping process: after being pressurized by a ground pump, the power fluid reaches the upper joint 2 through a pipe column at the upper part of the tool;
s2, unlocking a lock hook: the high-pressure power fluid enters the self-locking communicating joint seat 3 from the upper joint 2, pressure acts on the throat pipe 11, the throat pipe 11 moves downwards under the action of the pressure to drive the self-locking block 7 to move downwards, a cylindrical rod at the top end of the locking block 9 moves to the top end of the gradual change step 704 from the suction table 705, at the moment, the injection of the power fluid into the upper joint 2 is stopped, the core changing mechanism moves upwards under the combined action of the supporting spring 20 and the self-locking block compression spring 8, the lock hook 5 moves upwards along the lock hook table 4-1 to loosen the core changing mechanism, meanwhile, the self-locking block 7 moves upwards, and the cylindrical rod at the top end of the locking block 9 moves to the core changing table 703 from the top end of the gradual change step 704;
s3, old core taking out process: changing the pumping direction of the power liquid, injecting the power liquid into the annular space between the outer pipe 1 and the upper joint 2, enabling the core changing mechanism to move upwards under the combined action of the supporting spring 20 and the power liquid, and taking out the power liquid through a receiving device on the ground;
S4, replacing the core and filling: changing the pumping direction of the power liquid, injecting the power liquid into the upper joint 2, enabling a new core replacing mechanism to enter a pipe column from a sending device on the ground, enabling the supporting spring 20 to play a buffering role on the core replacing mechanism along with the power liquid entering the through hole I305 of the self-locking communication joint seat 3, enabling the throat pipe diffusion tube 11 to move downwards to drive the self-locking block 7 to move downwards, enabling a cylindrical rod at the top end of the locking block 9 to move to the suction table 705 from the core replacing table 703, enabling the locking hook 5 to move downwards along the locking hook table 4-1 to lock the core replacing mechanism, stopping injecting the power liquid into the upper joint 2, and completing core replacing operation.
(III) beneficial effects
The beneficial effects of the invention are as follows:
(1) The pump core is convenient to replace, the shutdown maintenance is not needed, and the production efficiency is improved;
(2) The device can be directly connected to a production pipe column and can be put down along with the pipe column, and the device has simple arrangement process and small workload;
(3) The pumping and lifting of the returned liquid to different degrees are realized by controlling the injection flow of the power liquid and replacing the core replacing mechanisms with different inner diameters, the underground pressure is accurately regulated and controlled, and the safety is high;
(4) The annulus return fluid has high fluidity, the rock debris in the pipeline is low in deposition, and no moving component is arranged in the annulus return fluid, so that the phenomena of pump blockage and pipeline blockage are effectively prevented;
(5) The application range is wide, and the method is suitable for the discharge-assisting operation such as reverse circulation pressure-control drilling, oil extraction with high sand content, natural gas hydrate drilling and the like.
Drawings
FIG. 1 is a cross-sectional view of the overall structure of the present invention;
FIG. 2 shows a lock cylinder mechanism according to the present invention a three-dimensional cross-sectional structural schematic;
FIG. 3 shows a core changing mechanism according to the present invention a three-dimensional cross-sectional structural schematic;
FIG. 4 is a schematic cross-sectional view of a self-locking communication joint seat of the present invention;
FIG. 5 shows the self-locking device of the present invention a block structure schematic diagram;
FIG. 6 is a schematic view of the lower joint structure of the present invention;
FIG. 7 is a schematic diagram of a core changing process according to the present invention;
FIG. 8 is a flow chart of a method for changing the core of a downhole replaceable core and a split concentric tube jet pump according to the present invention;
FIG. 9 is a flow chart of a method for pumping and lifting a downhole replaceable core and split concentric tube jet pump according to the present invention;
1. An outer tube; 2. an upper joint; 3. self-locking connecting joint seat; 4. a cover; 5. a latch hook; 6. a return spring; 7. a self-locking block; 8. a self-locking block compression spring; 9. a locking piece; 10. a lock block return spring; 11. a venturi diffuser; 12. a connecting pipe; 13. a jet nozzle; 14. a rubber sealing ring I; 15. a nozzle connecting pipe; 16. a water inlet outer tube; 17. a flow guiding pipe; 18. a split nozzle; 19. a rubber sealing ring II; 20. a support spring; 21. a lower joint; 22. a fastening screw; 4-1, countersunk holes; 4-2, a latch hook table; 9-1, slotted holes; 11-1, throat channel; 11-2, a diffusion tube; 12-1, wherein the pipe section is in a fence shape; 13-1, groove III; 15-1, rectangular holes; 16-1, a keyway type hole; 18-1, groove IV; 301. a boss I; 302. a groove I; 303. a self-locking block hole; 304. a boss II; 305. a through hole I; 306. a suction hole; 307. a boss III; 308. a boss IV; 309. a spring seat; 310. a boss V; 311. a boss VI; 312. a groove II; 313. screw holes; 314. a boss VII; 315. a through hole II; 701. a through hole IV; 702. a compression spring hole; 703. changing a core table; 704. gradual change step; 705. a suction table; 2101. a boss VIII; 2102. boss IX; 2103. a through hole III; 2104. boss X; 2105. boss XI.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully understood from the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that directions or positional relationships indicated as being "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are directions or positional relationships described based on the drawings are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Example 1
The underground replaceable core and shunt concentric tube jet pump is used for a straight well section.
As shown in the figure, the underground replaceable core and diversion concentric tube jet pump consists of a lock core mechanism, a core replacing mechanism and a diversion mechanism; the lock cylinder mechanism consists of an outer tube 1, an upper connector 2, a self-locking communicating connector base 3, a sealing cover 4, a lock hook 5, a reset spring 6, a self-locking block 7, a self-locking block compression spring 8, a locking block 9, a locking block reset spring 10 and a fastening screw 22, wherein the self-locking communicating connector base 3 is provided with a boss I301, a groove I302, a self-locking block hole 303, a boss II 304, a through hole I305, a suction hole 306, a boss III 307, a boss IV 308, a spring seat 309, a boss V310, a boss VI 311, a groove II 312, a screw hole 313, a boss VII 314 and a through hole II 315, the bottom end of the outer tube 1 and the bottom end of the upper connector 2 are respectively connected with the boss VII 314 and the boss I301 of the self-locking communicating connector base 3 through threads, the sealing cover 4 is connected with the screw hole 313 of the self-locking communicating connector base 3 through the fastening screw 22, the lock hook 5 is connected with the self-locking block 7 through the reset spring 6, the self-locking block 7 is connected with the boss VI 311 of the self-locking block communicating connector base 3 through the self-locking block compression spring 8, the locking block 9 is connected with the boss V310 of the self-locking communicating connector base 3 through threads, the bottom end 9 is connected with the spring 309 of the self-locking connector base 3 through the self-locking block communicating connector base 3 through the self-locking block 3; the core replacing mechanism consists of a throat pipe diffuser pipe 11, a connecting pipe 12, a jet nozzle 13, a rubber sealing ring I14, a nozzle connecting pipe 15, a shunt nozzle 18 and a rubber sealing ring II 19, wherein a rectangular hole 15-1 which is uniformly distributed in the circumferential direction is formed in the middle pipe section of the nozzle connecting pipe 15 and is used for enabling power fluid to flow into the nozzle connecting pipe 15 from a water inlet outer pipe 16, the top end of the throat pipe diffuser pipe 11 is connected with a self-locking block 7 through a lock hook 5, the bottom end of the throat pipe diffuser pipe 11 is connected with the top end of the connecting pipe 12 through threads, the bottom end of the connecting pipe 12 is connected with the top end of the jet nozzle 13 through threads, the rubber sealing ring I14 is arranged outside the bottom end of the jet nozzle 13, the top end of the nozzle connecting pipe 15 is connected with the inner side of the bottom end of the jet nozzle 13 through threads, and the inner side of the top end of the shunt nozzle 18 is provided with the rubber sealing ring II 19 outside the top end of the shunt nozzle 18; the diversion mechanism consists of an outer water inlet pipe 16, a diversion pipe 17, a supporting spring 20 and a lower joint 21, wherein the lower joint 21 is provided with a boss VIII 2101, a boss IX 2102, a through hole III 2103, a boss X2104 and a boss XI 2105, the middle pipe section of the outer water inlet pipe 16 is provided with a plurality of key slot holes 16-1 for circulation of power fluid, the top end of the outer water inlet pipe 16 is in threaded connection with the boss III 307 of the self-locking communicating joint seat 3, the bottom end of the outer water inlet pipe 16 is in threaded connection with the boss VIII 2101 of the lower joint 21, the top end of the diversion pipe 17 is in threaded connection with the boss IV 308 of the self-locking communicating joint seat 3, the bottom end of the diversion pipe 17 is in threaded connection with the boss XI 2105 of the lower joint 21, the bottom end of the diversion nozzle 18 is connected with the lower joint 21 through the supporting spring 20, and the bottom end of the supporting spring 20 is fixed on the boss X2104 of the lower joint 21.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top ends of the outer pipe 1 and the upper joint 2 are respectively provided with threads for connecting a top pipe column.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the two sides of the self-locking communication joint seat 3 are provided with through holes II 315 distributed circumferentially for the power fluid to flow to the flow guiding mechanism; the middle is provided with a through hole I305 for installing a core changing mechanism; the bottom end is provided with circumferentially distributed suction holes 306 for circulation of the mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the outside of the sealing cover 4 is provided with counter sunk holes 4-1 which are distributed in a linear and symmetrical way and are used for installing fastening screws 22; the top end of the inner side is provided with a latch hook platform 4-2 for releasing the core replacing mechanism by a latch hook 5.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the lock hook 5 is provided with a clamping hook for clamping the venturi tube diffusion tube 11; the bottom end is provided with a slotted hole for installing a return spring 6.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the self-locking block 7 is provided with a through hole IV 701, a compression spring hole 702, a core changing table 703, a gradual change step 704 and a suction table 705, wherein the through hole IV 701 is used for installing a return spring 6; the compression spring hole 702 is used for installing a self-locking block compression spring 8; gradual step 704 is a step-down step.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the locking block 9 is provided with a cylindrical rod which can move along the gradual change step 704 of the self-locking block 7; a threaded hole is arranged in the middle and is used for being connected with a boss V310 of the self-locking communication joint seat 3; the bottom end is provided with a slotted hole 9-1 for connecting a locking piece reset spring 10.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the inside of the throat diffusion tube 11 is provided with a throat channel 11-1, and the bottom end of the throat channel 11-1 is provided with a mixing tube for momentum exchange between the power liquid and the mixed slurry to form a returned liquid; the top end of the throat pipe channel 11-1 is provided with a diffusion pipe 11-2, which plays a role in decelerating and boosting the returned liquid.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the middle pipe section of the connecting pipe 12 is in a fence shape 12-1 and is used for circulating mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the jet nozzle 13 and the shunt nozzle 18 are respectively provided with a plurality of grooves III 13-1 and grooves IV 18-1 which are respectively used for installing a rubber sealing ring I14 and a rubber sealing ring II 19.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the bottom end of the lower joint 21 is provided with a boss IX 2102 for connecting with a bottom pipe column.
The working process of the invention for sucking and lifting the mixed slurry is as follows: when the device is used for concentric drill rod reverse circulation pressure control drilling and concentric double-pipe sand discharge oil extraction, the tool is connected into a downhole device combination of a drilling and completion system, the rotation speed of a ground pump is controlled by a frequency conversion control cabinet on the ground, the flow rate of power fluid is controlled, the pumping lifting speed of mixed slurry can be adjusted, further the output of returned liquid is controlled, after the power fluid is pressurized by the ground pump, the power fluid reaches an annulus between an outer pipe 1 and an upper joint 2 through a pipe column on the upper part of the tool, high-pressure power fluid enters the annulus between an outer pipe 1 and the upper joint 2 through a through hole II 315 of a self-locking communication joint seat 3, then sequentially passes through a keyway hole of the middle pipe section of the water inlet outer pipe 16 and a hole uniformly distributed in the periphery of the middle pipe section of a nozzle connecting pipe 15, reaches the inside of the nozzle connecting pipe 15, the power fluid is shunted in the nozzle connecting pipe 15, a part of the power fluid moves downwards to enter a shunt nozzle 18, another part of the power fluid shunted by the nozzle connecting pipe 15 moves upwards to enter a jet nozzle 13 through a through hole III 2103 of the lower joint 21, negative pressure is generated at the position of the nozzle 13, the mixed slurry is pumped into a fence of the middle pipe section 12 to enter the water inlet pipe 16 and the water inlet pipe 17, the mixed slurry is pumped into a well through a diffusion throat 11 and the mixed slurry is pumped into the well through the well, the inner diameter of the well is reduced, the mixed slurry is not pumped into the well is pumped, and the pressure is discharged into the well is controlled, and the inner diameter of the well is controlled, and the pressure is discharged into the well is simultaneously, the well is pumped and the well is separated, the pressure is discharged, the well is well and the well is pumped.
The core replacement process of the invention is as follows: after the power fluid is pressurized by a ground pump, the power fluid reaches the upper joint 2 through the pipe column at the upper part of the tool, the high-pressure power fluid enters the self-locking communicating joint seat 3 from the upper joint 2, pressure acts on the throat diffusion tube 11, the throat diffusion tube 11 moves downwards under the action of the pressure to drive the self-locking block 7 to move downwards, at the moment, the cylinder rod at the top end of the locking block 9 moves to the top end of the gradual change step 704 through the suction table 705, the power fluid is stopped to be injected into the upper joint 2, the core changing mechanism moves upwards under the combined action of the supporting spring 20 and the compression spring 8 of the self-locking block, the lock hook 5 moves upwards along the lock hook table 4-1 to loosen the core changing mechanism, meanwhile, the self-locking block 7 moves upwards, the cylinder rod at the top end of the locking block 9 moves to the core changing table 703 from the top end of the gradual change step 704, the power fluid pumping direction is changed, the power fluid is upwards moved to the annular space between the outer tube 1 and the upper joint 2 under the combined action of the supporting spring 20, the power fluid is taken out through the receiving device on the ground, the power fluid is changed to inject the power fluid into the upward joint 2, the new core changing mechanism enters the receiving device on the top end of the ground, the pipe column rod is moved into the buffer tube 3 along with the supporting spring 3, the self-locking block 3 moves along with the movement of the self-locking block 3, the core changing the core pipe joint 7 moves along with the pipe column tube 3, and the movement is stopped to move towards the core changing the core tube 3 along with the self-locking pipe joint seat 3, and the pipe joint 11 moves along with the self-locking buffer tube 3, and the motion moves towards the core changing core pipe 3, and reaches the top end, and reaches the buffer 3.
Example two
The underground replaceable core and split concentric tube jet pump is used for a horizontal section.
As shown in the figure, the underground replaceable core and diversion concentric tube jet pump consists of a lock core mechanism, a core replacing mechanism and a diversion mechanism; the lock cylinder mechanism consists of an outer tube 1, an upper connector 2, a self-locking communicating connector base 3, a sealing cover 4, a lock hook 5, a reset spring 6, a self-locking block 7, a self-locking block compression spring 8, a locking block 9, a locking block reset spring 10 and a fastening screw 22, wherein the self-locking communicating connector base 3 is provided with a boss I301, a groove I302, a self-locking block hole 303, a boss II 304, a through hole I305, a suction hole 306, a boss III 307, a boss IV 308, a spring seat 309, a boss V310, a boss VI 311, a groove II 312, a screw hole 313, a boss VII 314 and a through hole II 315, the bottom end of the outer tube 1 and the bottom end of the upper connector 2 are respectively connected with the boss VII 314 and the boss I301 of the self-locking communicating connector base 3 through threads, the sealing cover 4 is connected with the screw hole 313 of the self-locking communicating connector base 3 through the fastening screw 22, the lock hook 5 is connected with the self-locking block 7 through the reset spring 6, the self-locking block 7 is connected with the boss VI 311 of the self-locking block communicating connector base 3 through the self-locking block compression spring 8, the locking block 9 is connected with the boss V310 of the self-locking communicating connector base 3 through threads, the bottom end 9 is connected with the spring 309 of the self-locking connector base 3 through the self-locking block communicating connector base 3 through the self-locking block 3; the core replacing mechanism consists of a throat pipe diffuser pipe 11, a connecting pipe 12, a jet nozzle 13, a rubber sealing ring I14, a nozzle connecting pipe 15, a shunt nozzle 18 and a rubber sealing ring II 19, wherein a rectangular hole 15-1 which is uniformly distributed in the circumferential direction is formed in the middle pipe section of the nozzle connecting pipe 15 and is used for enabling power fluid to flow into the nozzle connecting pipe 15 from a water inlet outer pipe 16, the top end of the throat pipe diffuser pipe 11 is connected with a self-locking block 7 through a lock hook 5, the bottom end of the throat pipe diffuser pipe 11 is connected with the top end of the connecting pipe 12 through threads, the bottom end of the connecting pipe 12 is connected with the top end of the jet nozzle 13 through threads, the rubber sealing ring I14 is arranged outside the bottom end of the jet nozzle 13, the top end of the nozzle connecting pipe 15 is connected with the inner side of the bottom end of the jet nozzle 13 through threads, and the inner side of the top end of the shunt nozzle 18 is provided with the rubber sealing ring II 19 outside the top end of the shunt nozzle 18; the diversion mechanism consists of an outer water inlet pipe 16, a diversion pipe 17, a supporting spring 20 and a lower joint 21, wherein the lower joint 21 is provided with a boss VIII 2101, a boss IX 2102, a through hole III 2103, a boss X2104 and a boss XI 2105, the middle pipe section of the outer water inlet pipe 16 is provided with a plurality of key slot holes 16-1 for circulation of power fluid, the top end of the outer water inlet pipe 16 is in threaded connection with the boss III 307 of the self-locking communicating joint seat 3, the bottom end of the outer water inlet pipe 16 is in threaded connection with the boss VIII 2101 of the lower joint 21, the top end of the diversion pipe 17 is in threaded connection with the boss IV 308 of the self-locking communicating joint seat 3, the bottom end of the diversion pipe 17 is in threaded connection with the boss XI 2105 of the lower joint 21, the bottom end of the diversion nozzle 18 is connected with the lower joint 21 through the supporting spring 20, and the bottom end of the supporting spring 20 is fixed on the boss X2104 of the lower joint 21.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top ends of the outer pipe 1 and the upper joint 2 are respectively provided with threads for connecting a top pipe column.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the two sides of the self-locking communication joint seat 3 are provided with through holes II 315 distributed circumferentially for the power fluid to flow to the flow guiding mechanism; the middle is provided with a through hole I305 for installing a core changing mechanism; the bottom end is provided with circumferentially distributed suction holes 306 for circulation of the mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the outside of the sealing cover 4 is provided with counter sunk holes 4-1 which are distributed in a linear and symmetrical way and are used for installing fastening screws 22; the top end of the inner side is provided with a latch hook platform 4-2 for releasing the core replacing mechanism by a latch hook 5.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the lock hook 5 is provided with a clamping hook for clamping the venturi tube diffusion tube 11; the bottom end is provided with a slotted hole for installing a return spring 6.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the self-locking block 7 is provided with a through hole IV 701, a compression spring hole 702, a core changing table 703, a gradual change step 704 and a suction table 705, wherein the through hole IV 701 is used for installing a return spring 6; the compression spring hole 702 is used for installing a self-locking block compression spring 8; gradual step 704 is a step-down step.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the top end of the locking block 9 is provided with a cylindrical rod which can move along the gradual change step 704 of the self-locking block 7; a threaded hole is arranged in the middle and is used for being connected with a boss V310 of the self-locking communication joint seat 3; the bottom end is provided with a slotted hole 9-1 for connecting a locking piece reset spring 10.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the inside of the throat diffusion tube 11 is provided with a throat channel 11-1, and the bottom end of the throat channel 11-1 is provided with a mixing tube for momentum exchange between the power liquid and the mixed slurry to form a returned liquid; the top end of the throat pipe channel 11-1 is provided with a diffusion pipe 11-2, which plays a role in decelerating and boosting the returned liquid.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the middle pipe section of the connecting pipe 12 is in a fence shape 12-1 and is used for circulating mixed slurry.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the jet nozzle 13 and the shunt nozzle 18 are respectively provided with a plurality of grooves III 13-1 and grooves IV 18-1 which are respectively used for installing a rubber sealing ring I14 and a rubber sealing ring II 19.
The underground replaceable core and diversion concentric tube jet pump is characterized in that: the bottom end of the lower joint 21 is provided with a boss IX 2102 for connecting with a bottom pipe column.
The working process of the invention for sucking and lifting the mixed slurry is as follows: when the device is used for drilling and extracting natural gas hydrate of a double-layer pipe, a single tool or a plurality of tools are connected into a horizontal well section underground device combination at the same time, the rotation speed of a ground pump is controlled, the flow rate of power fluid is controlled, the pumping and lifting speed of mixed slurry is adjustable, further the output of returned fluid is controlled, after the power fluid is pressurized by the ground pump, the power fluid reaches the annular space between an outer pipe 1 and an upper joint 2 through a pipe column at the upper part of the tool, high-pressure power fluid enters the annular space between an outer water inlet pipe 16 and a guide pipe 17 through a through hole II 315 of a self-locking communicating joint seat 3, then sequentially passes through a keyway hole of the middle pipe section of the outer water inlet pipe 16 and holes uniformly distributed in the periphery of the middle pipe section of a nozzle connecting pipe 15, reaches the inside of the nozzle connecting pipe 15, the power fluid is shunted in the inside the nozzle connecting pipe 15, a part of the power fluid moves downwards to enter a shunt nozzle 18, another part of the power fluid shunted by the nozzle connecting pipe 15 moves upwards to enter a jet nozzle 13 through a through hole III 2103 of a lower joint 21, negative pressure is generated at the position of the nozzle 13, the mixed slurry is pumped into a fence of the middle pipe section 12, the mixed slurry is pumped into a diffusion pipe 11 and enters the mixed slurry flowing back into a deep sea platform through the mixed slurry platform 2, and the mixed slurry is pumped into the sea platform after the mixed slurry is pumped into the sea platform through the mixed slurry, and the mixed slurry is pumped into the sea platform through the deep pipe joint.
The core replacement process of the invention is as follows: after the power fluid is pressurized by a ground pump, the power fluid reaches the upper joint 2 through the pipe column at the upper part of the tool, the high-pressure power fluid enters the self-locking communicating joint seat 3 from the upper joint 2, pressure acts on the throat diffusion tube 11, the throat diffusion tube 11 moves downwards under the action of the pressure to drive the self-locking block 7 to move downwards, at the moment, the cylinder rod at the top end of the locking block 9 moves to the top end of the gradual change step 704 through the suction table 705, the power fluid is stopped to be injected into the upper joint 2, the core changing mechanism moves upwards under the combined action of the supporting spring 20 and the compression spring 8 of the self-locking block, the lock hook 5 moves upwards along the lock hook table 4-1 to loosen the core changing mechanism, meanwhile, the self-locking block 7 moves upwards, the cylinder rod at the top end of the locking block 9 moves to the core changing table 703 from the top end of the gradual change step 704, the power fluid pumping direction is changed, the power fluid is upwards moved to the annular space between the outer tube 1 and the upper joint 2 under the combined action of the supporting spring 20, the power fluid is taken out through the receiving device on the ground, the power fluid is changed to inject the power fluid into the upward joint 2, the new core changing mechanism enters the receiving device on the top end of the ground, the pipe column rod is moved into the buffer tube 3 along with the supporting spring 3, the self-locking block 3 moves along with the movement of the self-locking block 3, the core changing the core pipe joint 7 moves along with the pipe column tube 3, and the movement is stopped to move towards the core changing the core tube 3 along with the self-locking pipe joint seat 3, and the pipe joint 11 moves along with the self-locking buffer tube 3, and the motion moves towards the core changing core pipe 3, and reaches the top end, and reaches the buffer 3.
It is apparent that the above examples are given by way of illustration only and not by way of limitation, and that other variations or modifications may be made in the various forms based on the above description by those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. The underground core-replaceable and flow-splitting concentric tube jet pump is characterized by comprising a lock cylinder mechanism, a core-replacing mechanism and a flow-guiding mechanism; wherein, lock core mechanism comprises outer tube (1), top connection (2), auto-lock intercommunication joint seat (3), closing cap (4), latch hook (5), reset spring (6), auto-lock piece (7), auto-lock piece compression spring (8), locking piece (9), locking piece reset spring (10) and fastening screw (22), auto-lock intercommunication joint seat (3) are provided with boss I (301), recess I (302), auto-lock piece hole (303), boss II (304), through-hole I (305), suction hole (306), boss III (307), boss IV (308), spring holder (309), boss V (310), Boss VI (311), recess II (312), screw hole (313), boss VII (314) and through-hole II (315), outer tube (1) bottom and top connection (2) bottom respectively with boss VII (314) and boss I (301) of auto-lock intercommunication joint seat (3) pass through threaded connection, closing cap (4) are connected with screw hole (313) of auto-lock intercommunication joint seat (3) through fastening screw (22), latch hook (5) are connected with auto-lock piece (7) through reset spring (6), auto-lock piece (7) are connected with boss VI (311) of auto-lock intercommunication joint seat (3) through auto-lock piece compression spring (8), The locking block (9) is connected with a boss V (310) of the self-locking communication joint seat (3) through threads, and the bottom end of the locking block (9) is connected with a spring seat (309) of the self-locking communication joint seat (3) through a locking block reset spring (10); the core changing mechanism consists of a venturi tube diffusion tube (11), a connecting tube (12), a jet nozzle (13), a rubber sealing ring I (14), a nozzle connecting tube (15), a shunt nozzle (18) and a rubber sealing ring II (19), wherein a middle tube section of the nozzle connecting tube (15) is provided with rectangular holes (15-1) which are uniformly distributed in the circumferential direction and are used for enabling power fluid to circulate from a water inlet outer tube (16) into the nozzle connecting tube (15), the top end of the venturi tube diffusion tube (11) is connected with a self-locking block (7) through a lock hook (5), the bottom end of the venturi tube diffusion tube (11) is connected with the top end of the connecting tube (12) through threads, the bottom end of the connecting tube (12) is connected with the top end of the jet nozzle (13) through threads, The outer side of the bottom end of the jet nozzle (13) is provided with a rubber sealing ring I (14), the top end of a nozzle connecting pipe (15) is connected with the inner side of the bottom end of the jet nozzle (13) through threads, the bottom end of the nozzle connecting pipe (15) is connected with the inner side of the top end of a shunt nozzle (18) through threads, and the outer side of the top end of the shunt nozzle (18) is provided with a rubber sealing ring II (19); The diversion mechanism consists of an outer water inlet pipe (16), a diversion pipe (17), a supporting spring (20) and a lower joint (21), the lower joint (21) is provided with a boss VIII (2101), a boss IX (2102), a through hole III (2103), a boss X (2104) and a boss XI (2105), the middle pipe section of the outer water inlet pipe (16) is provided with a plurality of key slot holes (16-1) for the circulation of power fluid, the top end of the outer water inlet pipe (16) is connected with the boss III (307) of the self-locking communication joint seat (3) through threads, the bottom end of the outer water inlet pipe (16) is connected with the boss VIII (2101) of the lower joint (21) through threads, The top end of the flow guide pipe (17) is connected with a boss IV (308) of the self-locking communication joint seat (3) through threads, the bottom end of the flow guide pipe (17) is connected with a boss XI (2105) of the lower joint (21) through threads, the bottom end of the flow distribution nozzle (18) is connected with the lower joint (21) through a supporting spring (20), and the bottom end of the supporting spring (20) is fixed on a boss X (2104) of the lower joint (21).
2. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: two sides of the self-locking communication joint seat (3) are provided with through holes II (315) which are circumferentially distributed and are used for enabling power fluid to flow to the flow guiding mechanism; the middle is provided with a through hole I (305) for installing a core changing mechanism; the bottom end is provided with circumferentially distributed suction holes (306) for circulation of the mixed slurry.
3. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: the outside of the sealing cover (4) is provided with countersunk holes (4-1) which are distributed linearly and symmetrically and are used for installing fastening screws (22); the top end of the inner side is provided with a latch hook platform (4-2) for releasing the latch hook (5) to change the core mechanism.
4. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: the self-locking block (7) is provided with a through hole IV (701), a compression spring hole (702), a core changing table (703), a gradual change step (704) and a suction table (705), and the through hole IV (701) is used for installing a return spring (6); the compression spring hole (702) is used for installing a self-locking block compression spring (8); the gradual change step (704) is a step-by-step decreasing step.
5. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: the top end of the locking block (9) is provided with a cylindrical rod which can move along the gradual change step (704) of the self-locking block (7); a threaded hole is arranged in the middle and is used for being connected with a boss V (310) of the self-locking communication joint seat (3); the bottom end is provided with a slotted hole (9-1) for connecting a locking piece reset spring (10).
6. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: a venturi passage (11-1) is arranged in the venturi diffusion tube (11), and a mixing tube is arranged at the bottom end of the venturi passage (11-1) and used for carrying out momentum exchange on power liquid and mixed slurry to form a returned liquid; the top end of the throat pipe channel (11-1) is provided with a diffusion pipe (11-2) which plays a role in decelerating and pressurizing the returned liquid.
7. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: the middle pipe section of the connecting pipe (12) is in a fence shape (12-1) and is used for circulating mixed slurry.
8. A downhole interchangeable core and split concentric tube jet pump according to claim 1, wherein: the jet nozzle (13) and the shunt nozzle (18) are respectively provided with a groove III (13-1) and a groove IV (18-1) which are respectively used for installing a rubber sealing ring I (14) and a rubber sealing ring II (19).
9. A pumping and lifting method using a downhole replaceable core and split concentric tube jet pump according to any one of claims 1-8, characterized by: when the production operation is carried out, the working procedures can be divided into a power fluid pressurizing process, a power fluid injection process, a power fluid diversion process and a mixed slurry lifting process, and the steps are as follows:
s1, a power fluid pressurizing process: the tool is connected into the underground device combination, the frequency conversion control cabinet on the ground controls the flow of the power fluid by controlling the rotating speed of the ground pump, the pumping lifting speed of the mixed slurry can be regulated, the output of returned fluid is further controlled, and the power fluid reaches the annulus between the outer pipe (1) and the upper joint (2) through the pipe column at the upper part of the tool after being pressurized by the ground pump;
s2, a power fluid injection process: the high-pressure power fluid enters the annulus between the water inlet outer tube (16) and the flow guide tube (17) through a through hole II (315) which is communicated with the connector seat (3) by self-locking from the annulus between the outer tube (1) and the upper connector (2), and then sequentially passes through a key slot type hole of the middle tube section of the water inlet outer tube (16) and holes uniformly distributed in the circumferential direction of the middle tube section of the nozzle connecting tube (15) to reach the inside of the nozzle connecting tube (15);
s3, a power fluid diversion process: the high-pressure power fluid is split in the nozzle connecting pipe (15), and a part of the power fluid downwards enters the split nozzle (18) and enters the lower pipe column through the through hole III (2103) of the lower joint (21); the other part of the power liquid moves upwards to enter a jet nozzle (13) and is sprayed into a throat pipe diffuser (11);
s4, lifting the mixed slurry: the high-pressure power fluid generates negative pressure at the nozzle of the jet nozzle (13), the mixed slurry is sucked into the venturi diffusion tube (11) through the fence of the middle tube section of the connecting tube (12), the power fluid and the mixed slurry are mixed to form a returned fluid, the returned fluid enters the upper joint (2) after being subjected to speed reduction and pressure boost, the returned fluid enters the tube column at the upper part of the tool, reaches the ground through the tube column migration, and is subjected to sand removal, oil-gas-liquid separation and purification, and the circulation is performed, so that the high-efficiency production operation is realized.
10. A method for replacing a core by using a downhole replaceable core and split concentric tube jet pump as claimed in any one of claims 1 to 8, characterized in that: when the core replacing operation is carried out, the working procedures of the core replacing device can be divided into a power liquid pumping-in process, a lock hook unlocking process, an old core taking-out process and a core replacing and loading process, and the steps are as follows:
S1, a power liquid pumping process: after being pressurized by a ground pump, the power fluid reaches the upper joint (2) through a pipe column at the upper part of the tool;
S2, unlocking a lock hook: the high-pressure power fluid enters the self-locking communication joint seat (3) from the upper joint (2), pressure acts on the throat diffusion tube (11), the throat diffusion tube (11) moves downwards under the action of the pressure to drive the self-locking block (7) to move downwards, a cylindrical rod at the top end of the locking block (9) moves to the top end of the gradual change step (704) from the suction table (705), at the moment, the injection of the power fluid into the upper joint (2) is stopped, the core changing mechanism moves upwards under the combined action of the supporting spring (20) and the self-locking block compression spring (8), the locking hook (5) moves upwards along the locking hook table (4-2) to release the core changing mechanism, meanwhile, the self-locking block (7) moves upwards, and a cylindrical rod at the top end of the locking block (9) moves to the core changing table (703) from the top end of the gradual change step (704);
s3, old core taking out process: changing the pumping direction of the power liquid, injecting the power liquid into the annulus between the outer pipe (1) and the upper joint (2), enabling the core changing mechanism to move upwards under the combined action of the supporting spring (20) and the power liquid, and taking out the power liquid from the receiving device on the ground through the pipe column;
S4, replacing the core and filling: changing the power liquid pumping direction, injecting power liquid into the upper joint (2), enabling a new core replacing mechanism to enter a pipe column from a sending device on the ground, enabling the power liquid to enter a through hole I (305) of a self-locking communication joint seat (3), enabling a supporting spring (20) to buffer the core replacing mechanism, enabling a throat pipe (11) to move downwards, driving a self-locking block (7) to move downwards, enabling a cylindrical rod at the top end of a locking block (9) to move to a suction table (705) from a core replacing table (703), enabling a locking hook (5) to move downwards along a locking hook table (4-2) to lock the core replacing mechanism, stopping injecting power liquid into the upper joint (2), and completing core replacing operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310229375.4A CN116292448B (en) | 2023-03-10 | 2023-03-10 | Underground concentric tube jet pump with replaceable core and split flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310229375.4A CN116292448B (en) | 2023-03-10 | 2023-03-10 | Underground concentric tube jet pump with replaceable core and split flow |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144890Y (en) * | 2007-12-03 | 2008-11-05 | 大港油田集团有限责任公司 | Hydraulic jet pump suitable for horizontal well |
| CN115680577A (en) * | 2022-11-07 | 2023-02-03 | 西南石油大学 | Underground concentric pipe hydraulic lifting pump |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| AUPO724797A0 (en) * | 1997-06-06 | 1997-07-03 | Down Hole Technologies Pty Ltd | Retrieval head for a drill bit composed of a plurality of bit segments |
| US7934568B2 (en) * | 2007-06-27 | 2011-05-03 | Myrick Thomas M | Rock core removal method and apparatus |
| US9534461B2 (en) * | 2013-03-15 | 2017-01-03 | Weatherford Technology Holdings, Llc | Controller for downhole tool |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144890Y (en) * | 2007-12-03 | 2008-11-05 | 大港油田集团有限责任公司 | Hydraulic jet pump suitable for horizontal well |
| CN115680577A (en) * | 2022-11-07 | 2023-02-03 | 西南石油大学 | Underground concentric pipe hydraulic lifting pump |
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