CN113356779B - Coring device and coring method - Google Patents
Coring device and coring method Download PDFInfo
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- CN113356779B CN113356779B CN202110797625.5A CN202110797625A CN113356779B CN 113356779 B CN113356779 B CN 113356779B CN 202110797625 A CN202110797625 A CN 202110797625A CN 113356779 B CN113356779 B CN 113356779B
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- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 230000007246 mechanism Effects 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 32
- 238000005553 drilling Methods 0.000 claims description 15
- 238000004891 communication Methods 0.000 claims description 11
- 238000009413 insulation Methods 0.000 claims description 11
- 239000011148 porous material Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000012530 fluid Substances 0.000 claims 1
- 210000002445 nipple Anatomy 0.000 claims 1
- 238000004321 preservation Methods 0.000 abstract description 9
- 239000011435 rock Substances 0.000 description 18
- 239000007789 gas Substances 0.000 description 11
- 238000011065 in-situ storage Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000003860 storage Methods 0.000 description 4
- 230000003471 anti-radiation Effects 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
-
- 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
- E21B10/00—Drill bits
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
- E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit
-
- 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
-
- 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
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels or core extractors
- E21B25/10—Formed core retaining or severing means
-
- 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
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/06—Valve arrangements for boreholes or wells in wells
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a coring device and a coring method, wherein the coring device comprises an upper connecting buckle, a coring outer cylinder and a coring bit which are sequentially connected, a connecting buckle inner hole of the upper connecting buckle, an inner hole of the coring outer cylinder and a bit inner hole of the coring bit are communicated to form a first shaft hole, a detachable valve, a slidable differential lifting rod and a coring inner cylinder which is connected with the valve and the differential lifting rod are arranged in the first shaft hole, the coring hole of the coring bit is communicated with the coring inner cylinder through the valve, the differential lifting rod is also connected with a lifting mechanism, and the lifting mechanism can drive the differential lifting rod and the coring inner cylinder to be away from the valve for a certain distance and close the valve; the coring method comprises the step of putting a sealing ball into the core barrel to enable a lifting mechanism to drive a differential lifting rod to ascend. In the invention, the valve is closed after the core is away from the valve for a certain distance, so that the problem that the core blocks the valve is avoided, and the reliability of heat preservation and pressure maintaining coring is improved.
Description
Technical Field
The invention relates to the technical field of oil-gas exploration coring, in particular to a coring device and a coring method.
Background
The rock core is the most intuitive and reliable precious data reflecting the underground deposition environment, and when the rock mechanical test research is carried out, the rock or the rock core is usually taken out firstly, processed into a standard test piece and then tested. However, after the core is taken out from the in-situ environment, the part of the core, which is exposed to the outside air, is oxidized, the original pressure is released, oil, gas and water in the core volatilize and run off due to the change of the original pressure and temperature state of the stratum, and the physical properties of the rock are also damaged. The core is consistent with the real condition of the stratum in the aspect of oil and gas characteristics, and the result of oil and gas reserve calculation is accurate.
The existing heat-preservation and pressure-maintaining coring device comprises a drill bit and a drill bit body on the drill bit, wherein a core storage pipe is arranged in the drill bit body and used for storing a core after drilling, a ball valve is arranged at the front end of the core storage pipe, and the core storage pipe is closed through rotation of the control ball valve so as to realize in-situ fidelity coring. Because the rock core needs to pass through the ball valve before entering the core storage tube during coring, the situation that the ball valve is blocked easily occurs when the ball valve is closed, the difference between the taken rock core and the stratum in the aspect of oil and gas physical properties is large, and the accuracy and the reliability of the obtained data of the rock core are seriously influenced.
Disclosure of Invention
The invention aims to solve the following problems: the core makes the core keep away from the ball valve through promoting to get the core inner tube, and the core dies the ball valve card when preventing to close the ball valve, realizes that the normal position fidelity is got the core to guarantee that the result of oil gas reserves calculation is accurate.
In order to achieve the purpose, the invention provides a coring device, which comprises an upper connecting buckle, a coring outer cylinder and a coring bit, wherein the upper connecting buckle, the coring outer cylinder and the coring bit are sequentially connected, a connecting buckle inner hole of the upper connecting buckle, an inner hole of the coring outer cylinder and a bit inner hole of the coring bit are communicated to form a first shaft hole, a detachable valve, a slidable differential lifting rod and a coring inner cylinder for connecting the valve and the differential lifting rod are arranged in the first shaft hole, the coring hole of the coring bit is communicated with the coring inner cylinder through the valve, the differential lifting rod is further connected with a lifting mechanism, and the lifting mechanism can drive the differential lifting rod and the coring inner cylinder to be far away from the valve and then close the valve.
In the invention, an upper connecting buckle, a coring outer cylinder and a coring bit are sequentially connected, a first shaft hole is formed between the upper connecting buckle and the coring outer cylinder in a communicating way, a valve is detachably arranged in the first shaft hole and is close to the coring bit, a differential lifting rod is connected with the coring inner cylinder and is arranged in the first shaft hole in a sliding way, the coring inner cylinder drives the valve to open and close, the coring hole on the coring bit is communicated with the coring inner cylinder through the valve, when the coring device finishes drilling and coring, a lifting mechanism connected with the differential lifting rod and the upper connecting buckle lifts the differential lifting rod, the differential lifting rod drives the coring inner cylinder and a rock core in the coring inner cylinder to be away from the valve, after the rock core is away from the valve for a certain distance, the coring inner cylinder drives the valve to be closed, the rock core is prevented from being blocked by the valve, pressure maintaining is realized by sealing the rock core in the inner cylinder through the valve, and the double-layer heat insulation of the coring outer cylinder is realized, the rock core is consistent with the real condition of the stratum in the aspect of oil and gas characteristics, and the accuracy of the calculation result of the oil and gas reserves is ensured.
Optionally, hoist mechanism is including setting up the bulge loop of the outer wall of differential lifting rod, connect and detain and seted up the annular on the inner wall of hole, the bulge loop sets up in the annular, be provided with the second intercommunicating pore on the differential lifting rod, the second intercommunicating pore is located the bulge loop is close to get core bit one side, the second intercommunicating pore intercommunication connect and detain the hole, be provided with the second outage on the lateral wall of annular, the second outage is located the bulge loop is kept away from get core bit one side.
Optionally, a check valve is arranged in the second liquid discharge hole, and liquid in the ring groove can flow out of the ring groove through the check valve.
Optionally, differential lifting rod keeps away from it is provided with the second shaft hole to get core inner tube one end, the hole bottom surface in second shaft hole is provided with the third shaft hole, the second shaft hole with form the ball seat that can place the ball sealer between the third shaft hole, first through-hole has been seted up to the lateral wall in third shaft hole, it is provided with the third intercommunicating pore along the axial to get the core urceolus, it is provided with the spread groove along radial to get the core urceolus, it is provided with first drainage hole to get core drill bit to get core hole one side, first through-hole loops through the spread groove third intercommunicating first drainage hole.
Optionally, the coring hole is arranged on the hole bottom surface of the drill bit inner hole, the coring hole is connected with the valve through the connecting pipe body in a sealing manner, and one end of the coring outer barrel is arranged in the drill bit inner hole.
Optionally, the valve includes a ball valve assembly, and the ball valve assembly includes: ball valve, valve case, ball valve rotate semi-ring and two disk seats, valve case one end sets up in getting the core urceolus, the valve case other end intercommunication get the core hole, the ball valve rotationally sets up in the valve case, be provided with on the ball valve and be used for the intercommunication get the core hole with get the ball valve hole of core inner tube, two the disk seat sets up the ball valve both sides, still be provided with the groove of sliding on the valve case body lateral wall, the ball valve rotates the semi-ring and is C style of calligraphy structure, the ball valve rotates the semi-ring setting and is in get core urceolus one end and pass slide the groove with the ball valve is connected, valve case one end still is provided with the ball valve connecting piece, be provided with spacing tooth on the ball valve connecting piece, spacing tooth passes through the ball valve connecting piece with the valve case interval sets up, inner tube one end is provided with the inner tube connecting piece, the inner tube connecting piece is kept away from get the connection drag hook setting of core inner tube one end the valve case with get the valve case with it Between the spacing tooth get the core inner tube and keep away from behind the ball valve, connect the drag hook and pass through spacing tooth drives the valve casing is kept away from get the core drill bit, it blocks to get the core urceolus the ball valve rotates the semi-ring, makes the ball valve rotates the semi-ring and drives the ball valve rotates and closes the ball valve assembly.
Optionally, the inner wall of the coring outer cylinder is provided with a vacuum heat-insulating sleeve.
Optionally, go up to connect the knot with it connects through the connector between the urceolus to get the core bit with it can dismantle the connection to get the core urceolus, the vacuum insulation sleeve sets up the connector with get between the core bit.
Optionally, the surfaces of the coring inner cylinder and the valve are both coated with anti-radiation heat-insulating materials.
The invention also provides a coring method, comprising:
the method comprises the following steps: providing coring device and seal ball, coring device connects on connecting in proper order and detains, gets the urceolus and gets the core bit, on connect the knot connect detain the hole, get the hole of urceolus and get the drill bit hole intercommunication of core bit and form first shaft hole, be provided with detachable valve, slidable differential lifting rod in the first shaft hole, and connect the valve with the differential lifting rod get the core inner tube, get the core hole of core bit and pass through the valve intercommunication get the core inner tube, the outer wall of differential lifting rod has the bulge loop, connect and detain and seted up the annular on the inner wall of hole, the bulge loop sets up in the annular, the bulge loop is close to be provided with the second intercommunicating pore intercommunication on the differential lifting rod of coring bit one side connect detain the hole, the bulge loop is kept away from the lateral wall of the annular of coring bit one side is provided with the second outage, a second shaft hole is formed in one end, away from the coring inner cylinder, of the differential lifting rod, a third shaft hole is formed in the bottom surface of the second shaft hole, a ball seat capable of containing a sealing ball is formed between the second shaft hole and the third shaft hole, a first communication hole is formed in the side wall of the third shaft hole, a third communication hole is formed in the coring outer cylinder in the axial direction, a connection groove is formed in the coring outer cylinder in the radial direction, a first drainage hole is formed in one side of the coring hole of the coring bit, and the first communication hole is communicated with the first drainage hole sequentially through the connection groove and the third communication hole;
step two: connecting the upper connecting buckle with a drill rod for drilling, wherein liquid passes through an inner hole of the connecting buckle in the drilling process;
step three: and after the drilled core enters the coring inner cylinder, the sealing ball is thrown in from a wellhead, so that the sealing ball falls into the ball seat through the connecting buckle inner hole.
The invention has the beneficial effects that:
1. in the invention, an upper connecting buckle, a coring outer cylinder and a coring bit are sequentially connected, a first shaft hole is formed between the upper connecting buckle and the coring outer cylinder in a communicating way, a valve is detachably arranged in the first shaft hole and is close to the coring bit, a differential lifting rod is connected with the coring inner cylinder and is slidably arranged in the first shaft hole, the coring inner cylinder drives the valve to open and close, the coring hole on the coring bit is communicated with the coring inner cylinder through the valve, when the coring device finishes drilling and coring, a lifting mechanism connected with the differential lifting rod and the upper connecting buckle lifts the differential lifting rod, the differential lifting rod drives the coring inner cylinder and a rock core in the coring inner cylinder to keep away from the valve, after the rock core keeps away from the valve for a certain distance, the coring inner cylinder drives the valve to close, the valve is prevented from being blocked by the rock core, the rock core is sealed in the inner cylinder by the valve to realize pressure maintaining, and the double-layer heat insulation of the coring inner cylinder and the coring outer cylinder is realized, the rock core is consistent with the real condition of the stratum in the aspect of oil and gas characteristics, so that the accuracy of the calculation result of the oil and gas reserves is ensured;
2. in the process of drilling and coring by the coring device, pumped liquid is finally discharged from the first drainage hole through the connecting buckle inner hole, the second shaft hole, the third shaft hole, the first connecting hole, the connecting groove and the third connecting hole, and the liquid has the functions of lubricating and cooling a drill bit, a drill column and the like; when the sealing ball falls into the ball seat, the second shaft hole and the third shaft hole are cut off, liquid enters the ring groove through the connecting and buckling inner hole and the second communicating hole, the pump pressure rises to enable the differential lifting rod to be far away from the coring bit, the coring inner cylinder is far away from the valve and closes the valve, the liquid is discharged through the second liquid discharge hole, and the differential lifting rod is lifted by utilizing the hydraulic pressure of the liquid with lubricating and cooling functions, so that the structure is simple and reliable;
3. the inner wall of the coring outer cylinder is provided with a vacuum heat-preservation sleeve, the coring inner cylinder and the valve are sprayed by anti-radiation heat-insulation materials, and the inner cavity of the coring inner cylinder is further subjected to heat preservation and heat insulation so as to realize in-situ heat preservation and pressure-maintaining coring;
4. the inner core barrel and the core bit can be detached, and the inner core barrel and the valve can be conveniently taken out from the outer core barrel after the core is taken, so that the subsequent processing such as liquid nitrogen quick freezing and cutting on the ground is facilitated.
Drawings
FIG. 1 is a schematic view of the coring device in a state in which the ball valve is open;
FIG. 2 is a schematic view of the coring device in a closed ball valve state;
FIG. 3 is an enlarged view of one end of the coring bit of the coring device of FIG. 2;
FIG. 4 is a schematic view of a ball valve assembly;
fig. 5 is a schematic view of a ball valve.
The labels in the figure are: 1-upper connecting buckle, 101-connecting buckle inner hole, 102-ring groove, 2-differential lifting rod, 201-convex ring, 202-second shaft hole, 203-third shaft hole, 204-ball seat, 205-first connecting hole, 206-connecting groove, 207-second connecting hole, 3-connecting head, 4-coring bit, 401-first drainage hole, 402-bit inner hole, 403-connecting pipe body, 404-coring hole, 405-conical hole structure, 5-valve, 501-ball valve, 502-valve housing, 503-ball valve rotating half ring, 504-valve seat, 505-sliding groove, 506-ball valve hole, 507-fastener, 508-cotter groove, 509-half ring connecting pin, 6-coring outer cylinder, 601-third connecting hole, 7-coring inner cylinder, 701-inner cylinder connecting piece, 702-connecting drag hook, 8-vacuum heat preservation sleeve, 9-ball valve connecting piece, 901-limiting tooth, 10-sealing ring, 11-second liquid discharge hole and 12-sealing ball.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
Fig. 1 is a schematic diagram of a state that a ball valve of a coring device is opened, fig. 2 is a schematic diagram of a state that the ball valve of the coring device is closed, fig. 3 is an enlarged view of one end of a coring bit of the coring device in fig. 2, and as shown in fig. 1 to 3, the coring device comprises an upper connecting buckle 1, a coring outer cylinder 6 and a coring bit 4 which are connected in sequence. The upper connecting buckle 1 is used for connecting a power device to provide drilling power. Go up to connect to detain and connect the knot hole 101 that has an axial setting, on connect to detain 1 connect detain hole 101 core 6's hole and core bit 4's drill bit hole 402 intercommunication form first shaft hole. A drill bit inner hole 402 is arranged in the coring drill bit 4, a coring hole 404 is arranged on the bottom surface of the drill bit inner hole 402, and one end of the orifice of the drill bit inner hole 402 is in threaded connection with the coring outer cylinder 6. Be provided with detachable valve 5, slidable differential lifting rod 2 in the primary shaft hole, and connect valve 5 with differential lifting rod 2 get core inner tube 7, get core drill bit 4 get core hole 404 to pass through valve 5 intercommunication get core inner tube 7, differential lifting rod 2 still is connected with hoist mechanism, hoist mechanism can drive differential lifting rod 2 with it keeps away from to get core inner tube 7 close behind the valve 5 certain distance valve 5. The lifting mechanism is an oil cylinder arranged between the coring inner cylinder 7 and the differential lifting rod 2, or a piston cylinder is formed in the coring inner cylinder 7, a piston is formed outside the differential lifting rod 2, and the structure of the lifting mechanism is not limited by hydraulic jacking. When the coring device finishes drilling and coring, the core just enters the coring inner cylinder 7 through the valve 5, if the valve 5 is directly closed, the core is easily blocked, the valve 5 can not be closed, and the in-situ fidelity coring cannot be realized. In the invention, when the coring device finishes drilling and coring, the lifting mechanism drives the differential lifting rod 2 and the coring inner cylinder 7 to be away from the valve 5, and after the core in the coring inner cylinder 7 is away from the valve 5 for a certain distance, the valve 5 is closed under the driving of the coring inner cylinder 7, so that the valve 5 is prevented from being locked by the core when the valve 5 is closed, in-situ fidelity coring is realized, and the accuracy of the oil gas reserve calculation result is ensured.
Example 2
The coring device of embodiment 1 differs from the coring device of embodiment 2 in the lifting mechanism. Referring to fig. 1 to 3, the lifting mechanism includes a convex ring 201 disposed on an outer wall of the differential lifting rod 2, a ring groove 102 is disposed on an inner wall of the snap-fit inner hole 101, and an outer diameter of the convex ring 201 is equal to a diameter of the ring groove 102. The bulge loop 201 sets up in the annular groove 102, be provided with second intercommunicating pore 207 on the differential lifting rod 2, second intercommunicating pore 207 is located the bulge loop 201 is close to core bit 4 one side, second intercommunicating pore 207 communicates connect and detain hole 101, be provided with second outage hole 11 on the lateral wall of annular groove 102, second outage hole 11 is located the bulge loop 201 is kept away from core bit 4 one side. A one-way valve is arranged in the second liquid discharge hole 11, liquid in the ring groove 102 can pass through the one-way valve and is finally discharged to the outside of the upper connecting buckle 1, and the liquid comprises slurry pumped into the inner hole 101 of the connecting buckle by a pump. When liquid is pumped into the ring groove 102, the pump pressure rises to push the convex ring 201 to drive the differential lifting rod 2 to be away from the core bit 4, and when the convex ring 201 moves to be in contact with the side, away from the core bit 4, of the ring groove 102, the second communication hole 207 is communicated with the second liquid discharge hole 11. The differential lifting rod 2 is provided with a second shaft hole 202 at one end far away from the coring inner cylinder 7, a third shaft hole 203 is arranged on the bottom surface of the second shaft hole 202, a ball seat 204 capable of placing the sealing ball 12 is formed between the second shaft hole 202 and the third shaft hole 203, and the sealing ball 12 can cut off the second shaft hole 202 and the third shaft hole 203. First through-hole 205 has been seted up to the lateral wall in third shaft hole 203, it is provided with third through-hole 601 along the axial to get core urceolus 6, it is provided with spread groove 206 along radial to get core urceolus 6, it is provided with first drainage hole 401 to get core hole 404 one side of core bit 4, first through-hole 205 loops through spread groove 206 third through-hole 601 intercommunication first drainage hole 401. The coring hole 404 and the valve 5 are hermetically connected through a connecting pipe body 403, and one end of the coring outer cylinder 6 is arranged in the drill bit inner hole 402. A plurality of sealing rings 10 are arranged between the differential lifting rod 2 and the upper connecting buckle 1 to prevent liquid leakage.
The valve 5 comprises a ball valve assembly comprising: a ball valve 501, a valve housing 502, a ball valve rotating half-ring 503 and two valve seats 504. One end of the valve housing 502 is disposed in the coring outer cylinder 6, and the other end of the valve housing 502 is sleeved on the tube receiving body 403, so as to communicate with the coring hole 404. The ball valve 501 is rotatably disposed in the valve housing 502, and a ball valve hole 506 for communicating the coring hole 404 with the coring inner cylinder 7 is disposed in the ball valve 501. Two valve seats 504 are arranged on two sides of the ball valve 501 in the valve housing 502, the valve seats 504 are a ring body, and the valve seats 504 are used for supporting and sealing the ball valve 501. The valve housing 502 is further provided with a sliding groove 505 on the side wall, the ball valve rotating half ring 503 is arranged at one end of the coring outer cylinder 6 and passes through the sliding groove 505 to be connected with the ball valve 501, and the ball valve rotating half ring 503 slides up and down in the sliding groove 505 to drive the ball valve 501 to rotate 90 degrees so as to close the ball valve assembly. The valve housing 502 is further provided with a fastener 507 on the inner wall thereof, the fastener 507 is a cylindrical structure, the fastener 507 is used for being mounted on one side of the valve seat 504 to press the valve seat 504 against the ball valve 501 to form a seal, or the valve seat 504 is clamped between the ball valve 501 and one side wall of the sliding groove 505. The ball valve 501 is provided with a pin slot 508, the ball valve rotating half ring 503 is a C-shaped half ring body sleeved on the ball valve 501, the ball valve rotating half ring 503 is provided with half ring connecting pins 509 at two ends thereof to be inserted into the pin slot 508, the ball valve rotating half ring 503 slides in the sliding slot 505, and the half ring connecting pins 509 slide in the pin slot 508 towards or away from the rotating shaft of the ball valve 501, so that the ball valve 501 can be driven to rotate 90 ° around the rotating shaft. The valve housing 502 is further provided with a ball valve connector 9 at one end, the ball valve connector 9 is of a cylindrical structure, and the valve housing 502 is arranged in the ball valve connector 9 at one end and is connected with the ball valve connector 9 through threads. One end of the ball valve connecting piece 9 is provided with a limiting tooth 901, the limiting tooth 901 is of a circular ring structure, and the limiting tooth 901 and the valve housing 502 are arranged at intervals. Coring inner tube 7 one end and being provided with inner tube connecting piece 701, inner tube connecting piece 701 is cylinder tubular structure, inner tube connecting piece 701 one end sets up in coring inner tube 7, both threaded connection. One end, far away from the coring inner cylinder 7, of the inner cylinder connecting piece 701 is provided with a connecting drag hook 702, the connecting drag hook 702 is of a circular ring structure, and the connecting drag hook 702 is arranged between the valve housing 502 and the limiting teeth 901 in the ball valve connecting piece 9. After the coring inner cylinder 6 is away from the ball valve 501 by a certain distance, the connecting drag hook 702 drives the valve housing 502 to move in the direction away from the coring bit 4 through the limiting teeth 901, and the coring outer cylinder 7 blocks the ball valve rotating half ring 503 (the ball valve rotating half ring 503 moves downward relatively), so that the ball valve rotating half ring 503 drives the ball valve 501 to rotate by 90 degrees to close the ball valve assembly. A sealing ring 10 is disposed between the tube body 403 and the valve housing 502 to prevent liquid from entering the coring inner cylinder 7 through the valve housing 502.
In the process of drilling and coring by the coring device, pumped liquid passes through the connecting and buckling inner hole 101, the second shaft hole 202, the third shaft hole 203, the first connecting hole 205, the connecting groove 206 and the third connecting hole 601 and is finally discharged from the first liquid discharge hole 401, the liquid has the functions of lubrication, cooling and the like, when the sealing ball 12 is thrown into the connecting and buckling inner hole 101, the second shaft hole 202 and the third shaft hole 203 are cut off, the liquid enters the ring groove 102 through the connecting and buckling inner hole 101 and the second connecting hole 207, the pump pressure rises, the differential lifting rod 2 is far away from the coring bit 4, the coring inner cylinder 7 is far away from the ball valve 501 for a certain distance, the coring inner cylinder 7 drives the valve shell 502 to move upwards and close the ball valve assembly, the liquid is discharged through the second liquid discharge hole 11, the differential lifting rod 2 is lifted by utilizing the hydraulic pressure of the liquid with the functions of lubrication and cooling, and the structure is simple and reliable.
Example 3
Referring to fig. 1-3, in addition to embodiment 2, a vacuum heat-preserving sleeve 8 is arranged on the inner wall of the coring outer cylinder 6, and further performs heat preservation and insulation on the coring inner cylinder 7. Go up to connect and detain 1 with it connects through connector 3 between the urceolus 6 to get the core. The 3 both ends of connector taper structure, get 6 both ends of core urceolus be provided with the taper hole with 3 threaded connection of connector. Spread groove 206 sets up on the connector 3 on coring urceolus 6, perhaps 3 sections of connector with coring 6 taper hole bottom surface intervals of urceolus and setting up and forming spread groove 206. The coring outer cylinder 6 is in threaded connection with the coring bit 4. The oral area chamfer of drill bit hole 402 forms taper hole structure 404, it is conical to get the 6 both ends of urceolus, it inserts to get the 6 one end toper positions of urceolus the taper hole structure 404, will get core drill bit 4 with get core urceolus 6 threaded connection. When the coring bit 4 is removed, the differential lifting rod 2, the coring inner cylinder 7 and the ball valve assembly can be removed from the first axial hole as a whole. Vacuum insulation sleeve 8 sets up in the annular of coring 6 inner walls of urceolus, perhaps vacuum insulation sleeve 8 sets up the connector with coring between the urceolus 6, prevent to dismantle differential lifting rod 2 core inner tube 7 with during the ball valve assembly vacuum insulation sleeve 9 drops. The coring inner cylinder 7 and the ball valve assembly are sprayed by adopting anti-radiation heat-insulating materials, and the inner cavity of the coring inner cylinder 7 is further subjected to heat preservation and heat insulation, so that in-situ heat preservation and pressure maintaining coring are realized.
Example 4
Referring to fig. 1-3, the coring method comprises:
step one, providing a coring device and a sealing ball. The coring device comprises an upper connecting buckle 1, a coring outer cylinder 6 and a coring bit 4 which are connected in sequence, wherein the upper connecting buckle 1 is connected with a buckling inner hole 101, the inner hole of the coring outer cylinder 6 and the bit inner hole 402 of the coring bit 4 are communicated to form a first shaft hole, a detachable ball valve assembly, a slidable differential lifting rod 2 and a connection ball valve assembly and the coring inner cylinder 7 of the differential lifting rod 2 are arranged in the first shaft hole, the coring hole 401 of the coring bit 4 is communicated with the coring inner cylinder 7 through the ball valve assembly, the outer wall of the differential lifting rod 2 is provided with a convex ring 201, a ring groove 102 is arranged on the inner wall of the buckling inner hole 101, the convex ring 201 is arranged in the ring groove 102, the convex ring 201 is close to a second communicating hole 207 which is communicated with the buckling inner hole 101 which is arranged on the differential lifting rod 2 on one side of the coring bit 4, the convex ring 201 is far away from the side wall of the ring groove 102 on one side of the coring bit 4 is provided with a second liquid discharge hole 11, the differential lifting rod 2 is kept away from it is provided with second shaft hole 202 to get core inner tube 7 one end, the hole bottom surface of second shaft hole 202 is provided with third shaft hole 203, second shaft hole 202 with form the ball seat 204 that can place sealing ball 12 between the third shaft hole 203, first intercommunication hole 205 has been seted up to the lateral wall in third shaft hole 203, it is provided with third intercommunication hole 601 to get core urceolus 6 along the axial, it radially is provided with spread groove 206 to get core urceolus 6, it is provided with first drainage hole 401 to get core drill bit 4's core hole 404 one side, first intercommunication hole 205 loops through spread groove 206 third intercommunication first drainage hole 401.
And step two, drilling the upper connecting buckle 1 connected with a power device, pumping liquid into the connecting buckle inner hole 101 in the drilling process, wherein the liquid comprises slurry, the slurry passes through the connecting buckle inner hole 101, the second shaft hole 202, the third shaft hole 203, the first connecting hole 205, the connecting groove 206 and the third connecting hole 701 and is finally discharged from the first liquid discharge hole 501, and the slurry has the effects of lubrication, cooling and the like.
And step three, after the coring device finishes drilling and coring, throwing the sealing ball 12 into the fastener inner hole 101, so that the sealing ball 12 falls into the ball seat 204, the second shaft hole 202 and the third shaft hole 203 are cut off, slurry enters the annular groove 102 through the fastener inner hole 101 and the second communication hole 207, pumping up, so that the differential lifting rod 2 is far away from the coring bit 4, after a core in the coring inner cylinder 7 is far away from the ball valve 501 for a certain distance, the ball valve assembly is closed under the driving of the coring inner cylinder 7, the core is sealed in the coring inner cylinder 7 by the ball valve 501, meanwhile, the convex ring 201 moves to be in contact with one side of the annular groove 102 far away from the coring bit 4, the second communication hole 207 is communicated with the second liquid discharge hole 11, and the slurry is discharged through the second liquid discharge hole 11. And finally, integrally lifting the coring device out of the ground, disassembling the coring bit 4, integrally disassembling the differential lifting rod 2, the coring inner cylinder 7 and the ball valve assembly, and further processing the core in the coring inner cylinder 7.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The utility model provides a coring device, a serial communication port, including connect in proper order connect to detain, get the core urceolus and get the core bit, on connect to detain the hole core the hole of getting the core urceolus and get the drill bit hole intercommunication of core bit and form first shaft hole, be provided with detachable valve, the differential lifting rod of slidable in the first shaft hole, and connect the valve with the coring inner tube of differential lifting rod, the coring hole of getting the core bit passes through the valve intercommunication get the core inner tube, the differential lifting rod still is connected with hoist mechanism, hoist mechanism can drive the differential lifting rod with it keeps away from to get the core inner tube the valve, the valve includes the ball valve assembly, the ball valve assembly includes: ball valve, valve casing, ball valve rotate the semi-ring, the ball valve rotationally sets up in the valve casing, be provided with on the ball valve and be used for the intercommunication core hole with get the ball valve hole of core inner tube, still be provided with the groove of sliding on the valve casing lateral wall, the ball valve rotates the semi-ring and is C style of calligraphy structure, the ball valve rotates the semi-ring setting and is in get core urceolus one end and pass slide the groove with the ball valve is connected get the core inner tube and keep away from behind the ball valve, it blocks to get the core urceolus the ball valve rotates the semi-ring, makes the ball valve rotates the semi-ring and drives the ball valve rotates and closes the ball valve assembly.
2. The coring device of claim 1, wherein the lifting mechanism comprises a collar disposed on an outer wall of the differential lifting rod, wherein an annular groove is formed on an inner wall of the coupling inner hole, the collar is disposed in the annular groove, a second communication hole is formed in the differential lifting rod, the second communication hole is located on a side of the collar close to the coring bit, the second communication hole communicates with the coupling inner hole, a second drain hole is disposed on a side wall of the annular groove, and the second drain hole is located on a side of the collar away from the coring bit.
3. The coring device of claim 2, wherein a one-way valve is disposed within the second drainage aperture, and wherein fluid in the annular groove is able to flow out of the annular groove through the one-way valve.
4. The coring device of claim 2, wherein the differential lifting rod is far away from coring inner tube one end is provided with the second shaft hole, the hole bottom surface in second shaft hole is provided with the third shaft hole, the second shaft hole with form the ball seat that can place the ball sealer between the third shaft hole, first intercommunication hole has been seted up to the lateral wall in third shaft hole, it is provided with the third intercommunication hole to coring the urceolus along the axial, it radially is provided with the spread groove to coring the urceolus, coring bit's coring hole one side is provided with first drainage hole, first intercommunication hole loops through the spread groove third intercommunication first drainage hole.
5. The coring device of claim 4, wherein the coring hole is disposed on a bottom surface of the drill bit inner bore, the coring hole and the valve are sealingly connected by a nipple body, and one end of the coring outer barrel is disposed within the drill bit inner bore.
6. The coring device of any one of claims 1-5, wherein the ball valve assembly further comprises two valve seats, one end of the valve housing is disposed in the outer coring barrel, the other end of the valve housing is communicated with the coring hole, the two valve seats are disposed on two sides of the ball valve, one end of the valve housing is further provided with a ball valve connecting piece, the ball valve connecting piece is provided with a limiting tooth, the limiting tooth is spaced from the valve housing through the ball valve connecting piece, one end of the inner coring barrel is provided with an inner barrel connecting piece, a connecting drag hook, which is far away from one end of the inner coring barrel, of the inner barrel connecting piece is disposed between the valve housing and the limiting tooth, and the connecting drag hook drives the valve housing to be far away from the coring bit through the limiting tooth.
7. The coring device of claim 6, wherein the inner wall of the coring barrel is provided with a vacuum insulation sleeve.
8. The coring device of claim 7, wherein go up to connect detain with it connects through the connector to get between the urceolus, get the core bit with it can dismantle the connection to get the core urceolus, the vacuum insulation sleeve sets up the connector with get between the core bit.
9. The coring device of claim 6, wherein the coring inner barrel and the valve surface are both coated with a radiation-reflective insulation material.
10. A coring method using the coring device of claim 1, comprising:
the method comprises the following steps: providing coring device and sealing ball, the outer wall of differential lifting rod has the bulge loop, the annular has been seted up on the inner wall of knot hole, the bulge loop sets up in the annular, the bulge loop is close to be provided with the second intercommunicating pore intercommunication on the differential lifting rod of coring bit one side the knot hole, the bulge loop is kept away from the lateral wall of the annular of coring bit one side is provided with the second outage, differential lifting rod keeps away from coring inner tube one end is provided with the second shaft hole, the hole bottom surface of second shaft hole is provided with the third shaft hole, form the ball seat that can place the sealing ball between the second shaft hole and the third shaft hole, the lateral wall in third shaft hole has seted up first intercommunicating pore, the urceolus is provided with the third intercommunicating pore along the axial, the coring urceolus is along radially provided with the spread groove, coring bit's coring hole one side is provided with the first drainage hole, the first communicating hole is communicated with the first drainage hole through the connecting groove and the third communicating hole in sequence;
step two: connecting the upper connecting buckle with a drill rod for drilling, wherein liquid passes through an inner hole of the connecting buckle in the drilling process;
step three: get into when the core of getting get into after coring the inner tube, drop into from the well head the ball sealer makes the ball sealer passes through the joint is detained the hole and is fallen into the ball seat, the second shaft hole with the third shaft hole is cuted, and the pump pressure rises, makes differential lifting rod keeps away from core bit core in the inner tube is kept away from behind the ball valve certain distance core inner tube drive down the ball valve assembly is closed, the core quilt the ball valve is sealed in coring the inner tube.
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| CN114396240B (en) * | 2022-02-09 | 2023-05-30 | 贵州省矿山安全科学研究院有限公司 | Underground low-temperature airtight coal core drilling device and method for coal mine |
| CN114233227B (en) * | 2022-02-24 | 2022-05-31 | 陕西太合智能钻探有限公司 | Sealing device for core drill |
| CN114961617B (en) * | 2022-07-29 | 2022-10-25 | 陕西太合智能钻探有限公司 | Hydrodynamic core drill |
| CN115162989B (en) * | 2022-08-22 | 2023-10-20 | 中国地质科学院勘探技术研究所 | Lifting drilling type pressure maintaining coring drilling tool |
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