CN118548016B - Pipe column-free gas lift-jet flow drainage and extraction device and use method thereof - Google Patents
Pipe column-free gas lift-jet flow drainage and extraction device and use method thereof Download PDFInfo
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- CN118548016B CN118548016B CN202411014765.0A CN202411014765A CN118548016B CN 118548016 B CN118548016 B CN 118548016B CN 202411014765 A CN202411014765 A CN 202411014765A CN 118548016 B CN118548016 B CN 118548016B
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000000605 extraction Methods 0.000 title abstract description 20
- 239000007788 liquid Substances 0.000 claims abstract description 102
- 238000004519 manufacturing process Methods 0.000 claims abstract description 21
- 239000010985 leather Substances 0.000 claims abstract description 19
- 239000007924 injection Substances 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 53
- 230000009471 action Effects 0.000 claims description 13
- 244000287353 Crassocephalum crepidioides Species 0.000 claims description 6
- 206010016322 Feeling abnormal Diseases 0.000 claims description 6
- 239000003129 oil well Substances 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 238000007789 sealing Methods 0.000 claims description 6
- 230000007423 decrease Effects 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000005086 pumping Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000008676 import Effects 0.000 claims description 2
- 230000001174 ascending effect Effects 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 238000011084 recovery Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 90
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 abstract description 4
- 229910000037 hydrogen sulfide Inorganic materials 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000009833 condensation Methods 0.000 abstract description 2
- 239000004576 sand Substances 0.000 abstract description 2
- 239000011593 sulfur Substances 0.000 abstract description 2
- 229910052717 sulfur Inorganic materials 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000005065 mining Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/122—Gas lift
- E21B43/123—Gas lift valves
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- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
- E21B43/124—Adaptation of jet-pump systems
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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
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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
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Jet Pumps And Other Pumps (AREA)
Abstract
The invention relates to the technical field of oil and gas field exploitation engineering, in particular to a tubing string-free gas lift-to-jet flow drainage and extraction device and a use method thereof. The technical proposal is as follows: the casing is internally connected with a gas lift valve, a pressure-controlled jet suction pump and a packer which are more than one stage below through an oil pipe, and a check valve is arranged at the lower end of the pressure-controlled jet suction pump; the pump core is arranged in the inner cavity of the pump barrel of the pressure-controlled jet suction pump, the leather cup is arranged on the outer wall of the pump core, the spring and the sliding sleeve are arranged in the middle of the outer wall of the pump barrel, and the sliding sleeve is positioned on the outer side of the mixed liquid outlet. The beneficial effects are as follows: the invention realizes the conversion of self-injection, gas lift and jet drainage and extraction without lifting the whole production string, has simple and practical structure, economy and high efficiency, convenient and reliable conversion operation and wider application range, is more suitable for deep well or ultra-deep well oil extraction with rapid pressure drop, and is also suitable for drainage and extraction production of wells with no need of tubing string, such as high-inclination wells, sand-producing wells, high-condensation wells, high-sulfur and hydrogen sulfide wells, offshore complex well conditions and the like.
Description
Technical Field
The invention relates to the technical field of oil and gas field exploitation engineering, in particular to a tubing string-free gas lift-to-jet flow drainage and extraction device and a use method thereof.
Background
In the exploitation process of the oil gas well, along with the gradual decrease of the stratum pressure, the working fluid level of the oil gas well can be continuously lowered, so that the pump hanging depth is required to be optimized in time or the lifting mode is required to be changed, so that the requirement of lowering the working fluid level of the oil gas well is continuously met. For some wells with high requirements for hydrogen sulfide well control and reservoir protection, well with underground fault, wells with frequent pipe column movement difficulty, offshore and deep oil-gas wells with limited pipe column, the lifting mode needs to be conveniently converted and the pumping hanging is deepened under the condition of avoiding moving the existing pipe column. In the prior art, the conversion of the lifting mode and the adjustment of the pump hanging depth are completed by restarting the tubular column, which is time-consuming, high in cost, easy to pollute the stratum and has well control risks, and the construction risks and the cost of the well and the ultra-deep well with harmful components such as high hydrogen sulfide are higher. For low-pressure oil-gas wells, the production is often reduced due to the pollution of the reservoir caused by the backflow of well control fluid, which causes high cost, large risk and poor effect, so that a new tubing string is needed to be avoided, namely, the tubing string and the method for switching the liquid extraction mode and the pumping depth can be used for meeting the exploitation requirements of different exploitation stages.
Disclosure of Invention
The invention aims at overcoming the defects in the prior art, and provides the gas lift-to-jet flow drainage and extraction device without the pipe column and the use method thereof, so that the conversion of self-injection, gas lift and jet flow drainage and extraction is realized, the whole production pipe column does not need to be lifted, the structure is simple, the operation is convenient, and the operation cost and the risk are reduced.
The invention relates to a pipe column free gas lift transfer jet flow drainage and extraction device, which has the technical scheme that: the device comprises an oil pipe, a packer and a check valve, wherein the oil pipe is connected with a gas lift valve, a pressure-controlled jet suction pump and the packer which are more than one stage below the oil pipe in a sleeve, and the check valve is arranged at the lower end of the pressure-controlled jet suction pump; the pressure-controlled jet suction pump comprises a pump core, a leather cup, a pump barrel, a throat, a spring, a sliding sleeve and a liquid inlet valve, wherein the pump core is arranged in an inner cavity of the pump barrel, the leather cup is arranged on the outer wall of the pump core, the spring and the sliding sleeve are arranged in the middle of the outer wall of the pump barrel, and the sliding sleeve is positioned at the outer side of a mixed liquid outlet; the upper part of the pump core is provided with a power liquid inlet, the middle part of the pump core is provided with a nozzle, the lower part of the nozzle is provided with a throat, the lower side of the throat is provided with a pump core mixed liquid outlet, and the lower end of the pump core is provided with a liquid inlet valve.
Preferably, the gas lift valve comprises a working cylinder, an air cavity, a valve body, a corrugated pipe, a valve rod, an air inlet, a valve ball, a one-way valve ball, a gas lift valve spring and a connecting pipe, wherein one side of the working cylinder is connected with the valve body through the connecting pipe, the corrugated pipe is arranged in the middle of the inner cavity of the valve body, the air cavity is arranged at the upper part of the inner cavity, the lower end of the corrugated pipe is connected with the valve rod, and the valve ball is arranged at the lower end of the valve rod; the inner cavity of the connecting pipe is provided with a gas lift valve spring and a check valve ball; the outer wall of the valve body the middle part is provided with an air inlet.
Preferably, the right end of the connecting pipe is provided with an air inlet channel, and the air inlet channel is controlled to be opened and closed by a one-way valve ball and a gas lift valve spring; the lower part of the inner cavity of the valve body is provided with a second-stage air inlet channel, the second-stage air inlet channel is controlled by a valve ball and a valve rod, the air lift valve is provided with two stages, namely a first air lift valve and a second air lift valve, when air lift is carried out, high-pressure air is injected into an annular space between the sleeve and the oil pipe, the high-pressure air reaches an air inlet of the first air lift valve to enter the valve body, the bellows is compressed, the valve ball moves upwards to expose the second-stage air inlet channel, under the action of pressure difference, the high-pressure air pushes up the check valve ball to enter the working cylinder to be mixed with stratum liquid, and under the action of upward expansion force and density reduction of air, the mixed fluid of the air and the liquid ascends to the ground, so that air lift drainage of the stratum liquid is realized.
Preferably, when the second gas lift valve works, the first gas lift valve fails along with the continuous decline of the working fluid level of the oil well; the air injection pressure is increased on the ground, the second air lift valve starts to perform air intake work, the first air lift valve is closed, and the second air lift valve is used for replacing the first air lift valve, so that air lift liquid production is performed at higher lifting pressure and lift.
Preferably, the pressure-controlled jet suction pump adopts a pressure-controlled jet suction pump with a positive circulation and a large drift diameter, and the lower part of the pressure-controlled jet suction pump is connected with a reverse circulation jet pump with a small drift diameter, wherein the inner diameter of a pump barrel of the pressure-controlled jet suction pump with the large drift diameter is larger than the inner diameter of a pump barrel of the reverse circulation jet pump with the small drift diameter, and the outer diameter of a pump core with the small drift diameter of the reverse circulation jet pump is smaller than the inner diameter of a pump barrel of the pressure-controlled jet suction pump with the large drift diameter.
Preferably, the top of the pump core is provided with a salvaging head, the inner side of the upper end of the leather cup is connected with the outer wall of the pump core and is positioned at the lower side of the power fluid inlet, and the outer side of the lower end of the leather cup is in contact with the inner wall of the pump cylinder.
Preferably, a limiting boss is arranged in the middle of the outer wall of the pump cylinder, a spring is arranged below the limiting boss, and a sliding sleeve is arranged at the lower end of the spring.
Preferably, the sliding sleeve comprises an upper sliding sleeve body with a cylindrical structure and a lower sliding sleeve body with a cylindrical structure, wherein the inner wall of the upper sliding sleeve body is in sliding sealing fit with the outer wall of the pump cylinder, and the inner wall of the lower sliding sleeve body is in sliding sealing fit with the thick head end of the lower end of the pump cylinder; the upper side of the coarse head end is provided with a mixed liquid outlet; the outer diameter of the thick head end is larger than that of the outer wall of the pump cylinder; the upper middle part of the inner wall of the pump barrel is provided with an upper pump core setting step, and the lower end of the inner wall of the pump barrel is provided with a lower pump core setting step.
The application method of the pipe column-free gas lift-to-jet flow drainage and extraction device comprises the following steps:
1. When the gas lift liquid discharge is adopted, high-pressure gas is injected into an annular space between the ground facing sleeve and the oil pipe, at the moment, a sliding sleeve of the pressure-controlled jet suction pump is in a sealed and unopened state under the action of a spring, the high-pressure gas downwards reaches an air inlet of a first gas lift valve to enter a valve body, a bellows is compressed, a valve ball moves upwards to expose a second-stage air inlet channel, under the action of pressure difference, the high-pressure gas pushes up a check valve ball and a gas lift valve spring in a connecting pipe to enter a working cylinder to be mixed with stratum liquid, and under the action of upward expansion force and density reduction of the gas, the mixed gas and the liquid ascend to the ground, so that the gas lift liquid discharge and the mining of stratum liquid are realized;
2. As the working fluid level of the oil well continuously descends, the first gas lift valve fails, the second gas lift valve starts to be started, the second gas lift valve starts to perform air intake work by improving the pressure of high-pressure gas on the ground, the first gas lift valve is closed, the first gas lift valve is replaced by the second gas lift valve, so that gas lift liquid production is performed at higher lifting pressure and lifting lift, and the like until the gas lift valves with more than one stage are installed to complete the gas lift liquid production;
3. As the stratum energy continuously descends, a pump core of a pressure-controlled jet suction pump with a large drift diameter is thrown into an oil pipe on the ground and is seated in a pump cylinder; then, the ground pump is started to inject power liquid into the oil pipe to start the pressure-controlled jet suction pump, the high-pressure power liquid descends along the oil pipe and enters a nozzle in the pump core along the power liquid inlet, the high-speed jet power liquid is used for ejecting produced liquid from stratum, the formed mixed liquid enters a throat pipe and a diffusion pipe in the jet pump together, after mixing and decelerating, the mixed liquid enters an annulus between the pump core and the pump cylinder through a mixed liquid outlet of the pump core and is discharged outwards along a mixed liquid outlet of the pump cylinder, the pressure of the mixed liquid is larger than the elasticity of a spring, so that a sliding sleeve is pushed away, the mixed liquid enters an annular space between the sleeve and the oil pipe to ascend to the ground, and the work of converting gas lift drainage into jet drainage is realized.
The invention relates to a using method of a pipe column-free gas lift-to-jet flow drainage and extraction device, which comprises the following steps:
when the reverse circulation jet pump of the next stage needs to be started continuously:
The pump core of the large-diameter pressure-controlled jet suction pump is firstly fished out from the underground, then the small-diameter pump core is thrown into the oil pipe from the ground, the small-diameter pump core is seated in the reverse circulation jet pump, the pump core of the large-diameter pressure-controlled jet suction pump is thrown down again, after the large-diameter pump core is seated, the ground pump is started to inject power liquid into the oil pipe to start the large-diameter pressure-controlled jet suction pump, high-pressure power liquid is used for injecting stratum liquid from the lower reverse circulation jet pump in the large-diameter pressure-controlled jet suction pump, a part of formed pump mixed liquid flows downwards into the reverse circulation jet pump as power liquid to inject stratum liquid production, the formed pump mixed liquid is upwards moved into the bottom of the large-diameter jet pressure-controlled jet suction pump through the oil pipe, the rest part of mixed liquid in the annular space between the sleeve and the oil pipe is directly upwards moved to the ground, the multi-stage liquid flow circulation is carried out, the stratum liquid is continuously lifted to the ground, and the lifting and the high-lift liquid is completed.
Compared with the prior art, the invention has the following beneficial effects:
The invention realizes the conversion of self-injection, gas lift and jet drainage and extraction without lifting the whole production string, has simple and practical structure, economy and high efficiency, convenient and reliable conversion operation and wider application range, is more suitable for deep well or ultra-deep well oil extraction with rapid pressure drop, and is also suitable for drainage and extraction production of wells with no need of tubing string, such as high-inclination wells, sand-producing wells, high-condensation wells, high-sulfur and hydrogen sulfide wells, offshore complex well conditions and the like;
Moreover, the multi-stage gas lift, the primary jet flow drainage and the multi-stage jet flow drainage are conveniently switched, the requirements of deep well and ultra-deep well drainage can be met, the operation is efficient and simple, the self-injection production can be directly switched into the hydraulic jet flow drainage production for wells with insufficient ground gas sources in the later stage of self-injection, the selective range of the optimized lifting parameters is wide, the practicability is strong, and the hydraulic jet flow drainage device is more suitable for relay type liquid extraction of deep wells and ultra-deep wells.
Drawings
Fig. 1 is a schematic structural view of embodiment 1 of the present invention;
FIG. 2 is a schematic diagram of the structure of a gas lift valve;
FIG. 3 is a schematic diagram of a pressure controlled jet suction pump;
FIG. 4 is a schematic structural view of a sliding sleeve;
Fig. 5 is a schematic structural view of embodiment 2 of the present invention;
FIG. 6 is a schematic diagram of a first configuration of a reverse circulation jet pump;
FIG. 7 is a schematic diagram of a second configuration of a reverse circulation jet pump;
In the upper graph: the pump comprises a sleeve 1, an oil pipe 2, a first gas lift valve 3, a second gas lift valve 4, a pressure-controlled jet suction pump 5, a packer 6, a single flow valve 7, a packing cup packer 8, a reverse circulation jet pump 9, a working cylinder 3.1, an air cavity 3.2, a valve body 3.3, a corrugated pipe 3.4, a valve rod 3.5, an air inlet 3.6, a valve ball 3.7, a check valve ball 3.8, a gas lift valve spring 3.9, a connecting pipe 3.10, a pump core 5.1, a packing cup 5.2, a pump cylinder 5.3, a nozzle 5.4, a throat 5.5, a spring 5.6, a sliding sleeve 5.7, a liquid inlet 5.8, a mixed liquid outlet 5.9, a fishing head 5.11, a power liquid inlet 5.1.1.1, a pump core mixed liquid outlet 5.1.2, a limit boss 5.3.1, a coarse head end 5.3.2, an upper pump core setting step 5.3.3.4, a lower pump core setting step 5.1, an upper sliding sleeve body 5.7.1, a lower sliding sleeve body 5.7.7, a lower sliding sleeve 5.7.7, a small-through core pump 2, a second pump nozzle 9.9.9, a reverse circulation pump 9.9.8, a reverse circulation jet pump 9.9, a second pump throat 9.9, a reverse circulation pump 9.9, a small diameter of the second pump inlet 9.8, a reverse circulation pump 9.6, a third pump inlet 9.7, a reverse circulation pump 9.9.8, a third pump inlet and a reverse circulation pump.
Detailed Description
The preferred embodiments of the present invention will be described below with reference to the accompanying drawings, it being understood that the preferred embodiments described herein are for illustration and explanation of the present invention only, and are not intended to limit the present invention.
1, Referring to fig. 1-4, the invention relates to a tubing string-free gas lift rotary jet flow drainage device, which comprises an oil pipe 2, a packer 6 and a check valve 7, wherein the casing 1 is internally connected with a gas lift valve with more than one level, a pressure-controlled jet flow suction pump 5 and the packer 6 through the oil pipe 2, and the check valve 7 is arranged at the lower end of the pressure-controlled jet flow suction pump 5; the pressure-controlled jet suction pump 5 comprises a pump core 5.1, a leather cup 5.2, a pump barrel 5.3, a throat 5.5, a spring 5.6, a sliding sleeve 5.7 and a liquid inlet valve 5.8, wherein the pump core 5.1 is arranged in an inner cavity of the pump barrel 5.3, the leather cup 5.2 is arranged on the outer wall of the pump core 5.1, the spring 5.6 and the sliding sleeve 5.7 are arranged in the middle of the outer wall of the pump barrel 5.3, and the sliding sleeve 5.7 is positioned at the outer side of the mixed liquid outlet 5.9; the upper portion of pump core 5.1 is equipped with power fluid import 5.1.1, and the middle part is equipped with nozzle 5.4, and nozzle 5.4's lower part is equipped with throat 5.5, and the downside of throat 5.5 is equipped with pump core mixed solution export 5.1.2, the lower extreme of pump core 5.1 is equipped with feed liquor valve 5.8.
Referring to fig. 2, the gas lift valve comprises a working cylinder 3.1, an air cavity 3.2, a valve body 3.3, a corrugated pipe 3.4, a valve rod 3.5, an air inlet 3.6, a valve ball 3.7, a one-way valve ball 3.8, a gas lift valve spring 3.9 and a connecting pipe 3.10, wherein one side of the working cylinder 3.1 is connected with the valve body 3.3 through the connecting pipe 3.10, the corrugated pipe 3.4 is arranged in the middle of an inner cavity of the valve body 3.3, the air cavity 3.2 is arranged at the upper part of the inner cavity, the lower end of the corrugated pipe 3.4 is connected with the valve rod 3.5, and the lower end of the valve rod 3.5 is provided with the valve ball 3.7; the inner cavity of the connecting pipe 3.10 is provided with a gas lift valve spring 3.9 and a check valve ball 3.8; an air inlet 3.6 is arranged in the middle of the outer wall of the valve body 3.3.
The right end of the connecting pipe 3.10 is provided with an air inlet channel, and the air inlet channel controls a switch through a one-way valve ball 3.8 and a gas lift valve spring 3.9; the lower part of the inner cavity of the valve body 3.3 is provided with a second-stage air inlet channel, the second-stage air inlet channel is controlled to be opened and closed by a valve ball 3.7 and a valve rod 3.5, the air lift valve is provided with two stages, namely a first air lift valve 3 and a second air lift valve 4, when air lift is discharged, high-pressure air is injected into an annular space between the sleeve 1 and the oil pipe 2, the high-pressure air reaches an air inlet 3.6 of the first air lift valve 3 to enter the valve body 3.3, the bellows 3.4 is compressed, the valve ball 3.7 moves upwards to expose the second-stage air inlet channel, under the action of pressure difference, the high-pressure air pushes up the check valve ball 3.8 to be mixed with stratum fluid in the working cylinder 3.1, and the mixed fluid of the air and the stratum fluid is lifted to the ground under the action of upward expansion force and density reduction of the air, so that the air lift discharge and mining of the stratum fluid are realized.
When the second gas lift valve 4 works, the first gas lift valve 3 fails along with the continuous decline of the working fluid level of the oil well; by raising the gas injection pressure on the ground, the second gas lift valve 4 starts the gas intake operation, the first gas lift valve 3 is closed, and the first gas lift valve 3 is replaced by the second gas lift valve 4, so that gas lift liquid production is performed at higher lift pressure and lift.
In addition, the pressure-controlled jet suction pump 5 adopts a pressure-controlled jet suction pump 5 with positive circulation and large drift diameter.
Referring to fig. 3 and 4, a fishing head 5.11 is arranged at the top of the pump core 5.1, the inner side of the upper end of the leather cup 5.2 is connected with the outer wall of the pump core 5.1 and is positioned at the lower side of the power fluid inlet 5.1.1, and the outer side of the lower end of the leather cup 5.2 is contacted with the inner wall of the pump cylinder 5.3.
Wherein, the middle part of the outer wall of the pump cylinder 5.3 is provided with a limit boss 5.3.1, a spring 5.6 is arranged below the limit boss 5.3.1, and a sliding sleeve 5.7 is arranged at the lower end of the spring 5.6.
In addition, the sliding sleeve 5.7 comprises an upper sliding sleeve main body 5.7.1 with a cylindrical structure and a lower sliding sleeve main body 5.7.2 with a cylindrical structure, wherein the inner wall of the upper sliding sleeve main body 5.7.1 is in sliding sealing fit with the outer wall of the pump cylinder 5.3, and the inner wall of the lower sliding sleeve main body 5.7.2 is in sliding sealing fit with the thick head end 5.3.2 of the lower end of the pump cylinder 5.3; the upper side of the coarse head end 5.3.2 is provided with a mixed liquid outlet 5.9; the outer diameter of the thick head end 5.3.2 is larger than that of the outer wall of the pump cylinder 5.3; an upper pump core setting step 5.3.3 is arranged at the middle upper part of the inner wall of the pump cylinder 5.3, and a lower pump core setting step 5.3.4 is arranged at the lower end of the inner wall of the pump cylinder 5.3.
The application method of the pipe column-free gas lift-to-jet flow drainage and extraction device comprises the following steps:
1. When the gas lift liquid discharge is adopted, high-pressure gas is injected into an annular space between the ground facing sleeve 1 and the oil pipe 2, at the moment, a sliding sleeve 5.7 of a pressure-controlled jet suction pump 5 is in a sealed and unopened state under the action of a spring 5.6, the high-pressure gas downwards reaches an air inlet 3.6 of a first gas lift valve 3 and enters a valve body 3.3, a compression corrugated pipe 3.4, a valve ball 3.7 upwards moves to expose a second-stage air inlet channel, under the action of pressure difference, the high-pressure gas pushes up a check valve ball 3.8 and a gas lift valve spring 3.9 in a connecting pipe 3.10 and enters a working cylinder 3.1 to be mixed with stratum liquid, and under the action of upward expansion force and density reduction of gas, gas-liquid mixture ascends to the ground, so that gas lift liquid discharge is realized;
2. As the working fluid level of the oil well continuously descends, the first gas lift valve 3 fails, the second gas lift valve 4 starts to be started, the second gas lift valve 4 starts to perform air intake work by improving the pressure of high-pressure gas on the ground, the first gas lift valve 3 is closed, the first gas lift valve 3 is replaced by the second gas lift valve 4, so that gas lift liquid production is performed at higher lifting pressure and lifting height, and the like until the gas lift valves above the installed level complete the gas lift liquid production;
3. As the stratum energy continuously descends, a pump core 5.1 of a pressure-controlled jet suction pump 5 with a large drift diameter is thrown into the oil pipe 2 on the ground and is seated in a pump cylinder 5.3; then, the ground pump is started to inject power liquid into the oil pipe 2 to start the pressure-controlled jet suction pump 5, the high-pressure power liquid flows downwards along the oil pipe 2 and enters the nozzle 5.4 in the pump core 5.1 along the power liquid inlet 5.1.1, the produced liquid from the stratum is ejected by the high-speed jet power liquid, the formed mixed liquid enters the throat 5.5 and the diffusion pipe in the jet pump together, enters the annulus between the pump core 5.1 and the pump cylinder 5.3 through the pump core mixed liquid outlet 5.1.2 after mixing and decelerating, is discharged outwards along the mixed liquid outlet 5.9 of the pump cylinder 5.3, the pressure of the mixed liquid is larger than the elastic force of the spring 5.6, so that the sliding sleeve 5.7 is pushed away, the mixed liquid enters the annular space between the sleeve 1 and the oil pipe 2 to ascend to the ground, and the work of converting gas lift drainage into jet drainage is realized.
In embodiment 2, referring to fig. 4, the invention relates to a pipe string-free gas lift-to-jet flow drainage and extraction device, which comprises an oil pipe 2, a pressure-controlled jet flow suction pump 5, a packer 6, a check valve 7, a leather cup packer 8 and a reverse circulation jet flow pump 9, wherein the pipe string-free gas lift valve, the leather cup packer 8, the pressure-controlled jet flow suction pump 5, the reverse circulation jet flow pump 9 and the packer 6 which are more than one stage are connected in a casing 1 through the oil pipe 2, the leather cup packer 8 is positioned at the upper part of the pressure-controlled jet flow suction pump 5, and the check valve 7 is arranged at the lower end of the pressure-controlled jet flow suction pump 5.
In addition, the pressure-controlled jet suction pump 5 adopts a pressure-controlled jet suction pump 5 with a large drift diameter in forward circulation, and the lower part of the pressure-controlled jet suction pump 5 is connected with a reverse circulation jet pump 9 with a small drift diameter, wherein the inner diameter of a pump cylinder 5.3 of the pressure-controlled jet suction pump 5 with the large drift diameter is larger than the inner diameter of a pump cylinder 9.2 with the small drift diameter of the reverse circulation jet pump 9, and the outer diameter of a pump core 9.1 with the small drift diameter of the reverse circulation jet pump 9 is smaller than the inner diameter of the pump cylinder 5.3 of the pressure-controlled jet suction pump 5 with the large drift diameter.
Referring to fig. 6, the reverse circulation jet pump 9 of the present invention includes a small-diameter pump core 9.1, a small-diameter pump cylinder 9.2, a second power fluid inlet 9.3, a second stratum fluid inlet 9.4, a second throat 9.1.1, a second nozzle 9.1.2, a second mixed fluid outlet 9.1.3, and a second fishing head 9.1.4, wherein one side of the small-diameter pump cylinder 9.2 is provided with the second power fluid inlet 9.3, the bottom is provided with the second stratum fluid inlet 9.4, the small-diameter pump core 9.1 is installed in the small-diameter pump cylinder 9.2, the top of the small-diameter pump core 9.1 is provided with the second fishing head 9.1.4, the lower side of the second fishing head 9.1.4 is provided with the second mixed fluid outlet 9.1.3, the middle part of the small-diameter pump core 9.1 is provided with the second throat 9.1.1, the lower side of the second nozzle 9.1.2 is provided with the second nozzle 9.1, the lower side of the second nozzle 9.1.2 is not connected with the small-diameter pump cylinder 9.2, and the outer wall of the small-diameter pump cylinder 9.2 is not connected with the small-diameter pump cylinder 9.2.
When the invention is used for ultra-deep wells, the reverse circulation jet pump 9 of the next stage is required to be started continuously:
the pump core 5.1 of the large-diameter pressure-controlled jet suction pump 5 is firstly fished out from the underground, then the small-diameter pump core 9.1 is thrown into the oil pipe 2 from the ground, after the small-diameter pump core 9.1 is seated to the small-diameter pump cylinder 9.2 of the reverse circulation jet pump 9, the pump core 5.1 of the large-diameter pressure-controlled jet suction pump 5 is thrown down again, after the large-diameter pump core 5.1 is seated, the ground pump is started to inject power fluid into the oil pipe 2 to start the large-diameter pressure-controlled jet suction pump 5, high-pressure power fluid is injected into stratum fluid from the lower reverse circulation jet pump 9 at the pressure-controlled jet suction pump 5 with the large-diameter, then an outlet pump mixed fluid is formed, after a part of the outlet pump mixed fluid is injected into the second power fluid inlet 9.3 of the reverse circulation jet pump 9 as power fluid, the formed outlet 9.1.3 of the stratum fluid is sprayed out, after the stratum fluid is lifted up to the bottom of the large-diameter pressure-controlled jet suction pump 5 along the oil pipe 2, the high-pressure-controlled jet suction pump is sucked into the sleeve pipe 2, the residual fluid is directly discharged to the ground, and the annulus is lifted out to the ground, and the high-pressure fluid is continuously pumped up to the ground.
The embodiment 3 of the invention relates to a tubing string-free gas lift-to-jet flow drainage and extraction device, which comprises an oil pipe 2, a pressure-controlled jet flow suction pump 5, a packer 6, a check valve 7, a leather cup packer 8 and a reverse circulation jet flow pump 9, wherein the tubing string-free gas lift valve, the leather cup packer 8, the pressure-controlled jet flow suction pump 5, the reverse circulation jet flow pump 9 and the packer 6 which are connected with one another at more than one stage are connected in a casing 1 through the oil pipe 2, the leather cup packer 8 is positioned at the upper part of the pressure-controlled jet flow suction pump 5, and the check valve 7 is arranged at the lower end of the pressure-controlled jet flow suction pump 5.
Referring to fig. 7, the reverse circulation jet pump 9 of the present invention may adopt an integral structure, and specifically includes a second power fluid inlet 9.3, a second stratum fluid inlet 9.4, a reverse circulation jet pump nozzle 9.5, a reverse circulation jet pump upper joint 9.6, a reverse circulation jet pump body 9.7, and a reverse circulation jet pump throat 9.8, wherein the lower end of the reverse circulation jet pump body 9.7 is provided with the second stratum fluid inlet 9.4, the lower side of the reverse circulation jet pump body 9.7 is provided with the second power fluid inlet 9.3, the lower side of the reverse circulation jet pump nozzle 9.5 is communicated with the second power fluid inlet 9.3, the upper side of the reverse circulation jet pump nozzle 9.5 is provided with the reverse circulation jet pump throat 9.8, and the diffusion port of the reverse circulation jet pump throat 9.8 is communicated with the reverse circulation jet pump upper joint 9.6.
When the invention is used for ultra-deep wells, the reverse circulation jet pump 9 of the next stage is required to be started continuously:
The ground pump is started to inject power liquid into the oil pipe 2 to start the pressure-controlled jet suction pump 5 with large diameter, the high-pressure power liquid is injected into stratum liquid from the lower reverse circulation jet pump 9 by the pressure-controlled jet suction pump 5 with large diameter to form pump-out mixed liquid, one part of the pump-out mixed liquid flows downwards into the second power liquid inlet 9.3 of the reverse circulation jet pump 9 as power liquid to inject stratum liquid production, the formed pump-out mixed liquid is injected out through the reverse circulation jet pump upper joint 9.6, then the pump-out mixed liquid is sucked into the pump along the bottom of the pressure-controlled jet suction pump 5 with large diameter, and the other part of the mixed liquid remained in the annulus between the sleeve 1 and the oil pipe 2 is directly upwards to the ground, so the multistage liquid flow circulates, the stratum liquid is continuously lifted to the ground, and the lifting drainage and the production of the ultra-deep well with high lift are completed.
The above description is only a few preferred embodiments of the present invention, and any person skilled in the art may make modifications to the above described embodiments or make modifications to the same. Accordingly, the corresponding simple modifications or equivalent changes according to the technical scheme of the present invention fall within the scope of the claimed invention.
Claims (9)
1. The utility model provides a free tubular column gas lifts changes efflux drainage device, includes oil pipe (2), packer (6), uniflow valve (7), characterized by: a plurality of gas lift valves, a pressure-controlled jet suction pump (5) and a packer (6) are connected and lowered into the casing (1) through an oil pipe (2), and a single-flow valve (7) is arranged at the lower end of the pressure-controlled jet suction pump (5); the pressure-controlled jet suction pump (5) comprises a pump core (5.1), a leather cup (5.2), a pump barrel (5.3), a throat (5.5), a spring (5.6), a sliding sleeve (5.7) and a liquid inlet valve (5.8), wherein the pump core (5.1) is arranged in an inner cavity of the pump barrel (5.3), the leather cup (5.2) is arranged on the outer wall of the pump core (5.1), the spring (5.6) and the sliding sleeve (5.7) are arranged in the middle of the outer wall of the pump barrel (5.3), and the sliding sleeve (5.7) is positioned on the outer side of a mixed liquid outlet (5.9); the upper part of the pump core (5.1) is provided with a power liquid inlet (5.1.1), the middle part of the pump core is provided with a nozzle (5.4), the lower part of the nozzle (5.4) is provided with a throat pipe (5.5), the lower side of the throat pipe (5.5) is provided with a pump core mixed liquid outlet (5.1.2), and the lower end of the pump core (5.1) is provided with a liquid inlet valve (5.8);
The gas lift valve comprises a working cylinder (3.1), an air cavity (3.2), a valve body (3.3), a corrugated pipe (3.4), a valve rod (3.5), an air inlet (3.6), a valve ball (3.7), a one-way valve ball (3.8), a gas lift valve spring (3.9) and a connecting pipe (3.10), wherein one side of the working cylinder (3.1) is connected with the valve body (3.3) through the connecting pipe (3.10), the corrugated pipe (3.4) is arranged in the middle of an inner cavity of the valve body (3.3), the air cavity (3.2) is arranged on the upper portion of the inner cavity, the lower end of the corrugated pipe (3.4) is connected with the valve rod (3.5), and the lower end of the valve rod (3.5) is provided with the valve ball (3.7); the inner cavity of the connecting pipe (3.10) is provided with a gas lift valve spring (3.9) and a one-way valve ball (3.8); an air inlet (3.6) is arranged in the middle of the outer wall of the valve body (3.3).
2. The free-string gas lift rotary jet drainage device of claim 1, wherein: an air inlet channel is arranged at the right end of the connecting pipe (3.10), and the air inlet channel controls a switch through a one-way valve ball (3.8) and a gas lift valve spring (3.9); the utility model discloses a gas lift system, including valve body (3.3) and valve rod, the inner chamber lower part of valve body (3.3) be equipped with second level inlet channel, second level inlet channel passes through valve ball (3.7) and valve rod (3.5) control switch, the gas lift valve is equipped with the two-stage, is first gas lift valve (3) and second gas lift valve (4) respectively, when gas lift flowing back, injects high-pressure gas to the annular space between sleeve pipe (1) and oil pipe (2), high-pressure gas reaches in inlet port (3.6) of first gas lift valve (3) gets into valve body (3.3), compression bellows (3.4), valve ball (3.7) shift up and expose second level inlet channel, under the effect of pressure differential, high-pressure gas pushes up check valve ball (3.8), get into in working cylinder (3.1) with stratum liquid mixture, under the effect of the ascending expansion force of gas-liquid mixture fluid and density reduction, gas lift drainage of stratum liquid is realized.
3. The free-string gas lift rotary jet drainage device of claim 2, wherein: when the second gas lift valve (4) works, the first gas lift valve (3) fails along with the continuous decline of the working fluid level of the oil well; by increasing the gas injection pressure on the ground, the second gas lift valve (4) starts to perform gas-intake operation, the first gas lift valve (3) is closed, and the first gas lift valve (3) is replaced by the second gas lift valve (4), so that gas lift liquid production is performed at higher lift pressure and lift.
4. The free-string gas lift rotary jet drainage device of claim 3, wherein: the pressure-controlled jet suction pump (5) adopts a pressure-controlled jet suction pump (5) with large drift diameter in forward circulation, and the lower part of the pressure-controlled jet suction pump is connected with a reverse circulation jet pump (9) with small drift diameter, wherein the inner diameter of a pump barrel (5.3) of the pressure-controlled jet suction pump (5) with large drift diameter is larger than the inner diameter of a pump barrel (9.2) with small drift diameter of the reverse circulation jet pump (9), and the outer diameter of a pump core (9.1) with small drift diameter of the reverse circulation jet pump (9) is smaller than the inner diameter of the pump barrel (5.3) of the pressure-controlled jet suction pump (5) with large drift diameter.
5. The free-string gas lift rotary jet drainage device of claim 4, wherein: the top of pump core (5.1) is equipped with salvages head (5.11), the upper end inboard of leather cup (5.2) be connected with the outer wall of pump core (5.1), and be located the downside of power fluid import (5.1.1), the lower extreme outside of leather cup (5.2) and the inner wall contact of pump cylinder (5.3).
6. The free-string gas lift rotary jet drainage device of claim 5, wherein: a limiting boss (5.3.1) is arranged in the middle of the outer wall of the pump barrel (5.3), a spring (5.6) is arranged below the limiting boss (5.3.1), and a sliding sleeve (5.7) is arranged at the lower end of the spring (5.6).
7. The free-string gas lift rotary jet drainage device of claim 6, wherein: the sliding sleeve (5.7) comprises an upper sliding sleeve main body (5.7.1) with a cylindrical structure and a lower sliding sleeve main body (5.7.2) with a cylindrical structure, the inner wall of the upper sliding sleeve main body (5.7.1) is in sliding sealing fit with the outer wall of the pump cylinder (5.3), and the inner wall of the lower sliding sleeve main body (5.7.2) is in sliding sealing fit with the thick head end (5.3.2) at the lower end of the pump cylinder (5.3); the upper side of the coarse head end (5.3.2) is provided with a mixed liquid outlet (5.9); the outer diameter of the thick head end (5.3.2) is larger than that of the outer wall of the pump cylinder (5.3); an upper pump core setting step (5.3.3) is arranged at the middle upper part of the inner wall of the pump cylinder (5.3), and a lower pump core setting step (5.3.4) is arranged at the lower end of the inner wall of the pump cylinder (5.3).
8. The method for using the free pipe column gas lift transfer jet flow drainage device according to claim 7, which is characterized in that: the method comprises the following steps:
1. when the gas lift drainage device is used, high-pressure gas is injected into an annular space between a ground facing sleeve (1) and an oil pipe (2), at the moment, a sliding sleeve (5.7) of a pressure-controlled jet suction pump (5) is in a sealed and unopened state under the action of a spring (5.6), the high-pressure gas downwards reaches an air inlet (3.6) of a first gas lift valve (3) to enter a valve body (3.3), a bellows (3.4) is compressed, a valve ball (3.7) moves upwards to expose a second-stage air inlet channel, under the action of pressure difference, the high-pressure gas pushes up a check valve ball (3.8) and a gas lift valve spring (3.9) in a connecting pipe (3.10) to be mixed with stratum liquid in a working cylinder (3.1), and the gas lift drainage of the stratum liquid is realized under the action of upward expansion force and density reduction of the gas;
2. As the working fluid level of the oil well continuously descends, the first gas lift valve (3) fails, the second gas lift valve (4) starts to be started, the second gas lift valve (4) starts to perform air intake work by improving the pressure of high-pressure gas on the ground, the first gas lift valve (3) is closed, the first gas lift valve (3) is replaced by the second gas lift valve (4), so that gas lift liquid production is performed at higher lifting pressure and lifting lift, and the like until the gas lift valves above the installed level complete the gas lift liquid production;
3. As the stratum energy continuously descends, a pump core (5.1) of a pressure-controlled jet suction pump (5) with a large drift diameter is thrown into an oil pipe (2) on the ground and is seated in a pump cylinder (5.3); then, the ground pump is started to inject power fluid into the oil pipe (2) to start the pressure-controlled jet suction pump (5), the high-pressure power fluid descends along the oil pipe (2) and enters the nozzle (5.4) in the pump core (5.1) along the power fluid inlet (5.1.1), the produced fluid from the stratum is ejected by the high-speed jet power fluid, the formed mixed fluid enters the throat (5.5) and the diffusion pipe in the jet pump together, after mixing and decelerating, enters the annulus between the pump core (5.1.1) and the pump cylinder (5.3) through the pump core mixed fluid outlet (5.1.2), and is discharged outwards along the mixed fluid outlet (5.9) of the pump cylinder (5.3), the pressure of the mixed fluid is larger than the elasticity of the spring (5.6), so that the sliding sleeve (5.7) is pushed away, the mixed fluid enters the annular space between the sleeve (1) and the oil pipe (2) to ascend to the ground, and the work of converting gas lifting and drainage into jet drainage is realized.
9. The method for using the free pipe column gas lift transfer jet flow drainage device according to claim 8, which is characterized in that: when the reverse circulation jet pump (9) of the next stage needs to be started continuously:
The method comprises the steps of firstly, fishing out a pump core (5.1) of a large-diameter pressure-controlled jet suction pump (5) from underground, then, throwing a small-diameter pump core (9.1) into an oil pipe (2) from the ground, after the small-diameter pump core (9.1) is seated in a reverse circulation jet pump (9), throwing down the pump core (5.1) of the large-diameter pressure-controlled jet suction pump (5), starting a ground pump to inject power liquid into the oil pipe (2) after the large-diameter pump core (5.1) is seated, starting the large-diameter pressure-controlled jet suction pump (5) from the ground, and after the high-pressure power liquid is injected into stratum liquid from the lower reverse circulation jet pump (9) from the large-diameter pressure-controlled jet pump (5), forming an outlet pump mixed liquid, after part of the outlet pump mixed liquid flows into the reverse circulation jet pump (9) serving as power liquid stratum production liquid, ascending to the bottom of the large-diameter pressure-controlled jet pump (5) through the oil pipe (2), sucking the bottom of the large-diameter pressure-controlled jet pump (5), and directly pumping the high-pressure power liquid into the ground through the annulus, and discharging the residual liquid to the ground annulus to the continuous fluid, and completing the continuous fluid recovery.
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| CN113944451A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Pneumatic rodless liquid drainage lifting pipe column and method for gas drive production well |
| CN116658126A (en) * | 2023-07-26 | 2023-08-29 | 山东成林石油工程技术有限公司 | Ultra-high lift downhole hydraulic lifting pump set and use method thereof |
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| AR113634A1 (en) * | 2017-12-13 | 2020-05-27 | Oil & Gas Tech Entpr C V | GAS ARTIFICIAL LIFTING ACCELERATOR TOOL |
| CN117588187B (en) * | 2024-01-19 | 2024-03-19 | 山东成林石油工程技术有限公司 | Screw pump driven high-lift jet flow drainage device and use method |
| CN118008217B (en) * | 2024-04-08 | 2024-06-11 | 山东成林石油工程技术有限公司 | Three-stage serial pump deep pumping and drainage device and use method |
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| CN113944451A (en) * | 2020-07-15 | 2022-01-18 | 中国石油化工股份有限公司 | Pneumatic rodless liquid drainage lifting pipe column and method for gas drive production well |
| CN116658126A (en) * | 2023-07-26 | 2023-08-29 | 山东成林石油工程技术有限公司 | Ultra-high lift downhole hydraulic lifting pump set and use method thereof |
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