CN114233223B - Ground well coal stratum pressurize quick coring device - Google Patents
Ground well coal stratum pressurize quick coring device Download PDFInfo
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- CN114233223B CN114233223B CN202111404426.XA CN202111404426A CN114233223B CN 114233223 B CN114233223 B CN 114233223B CN 202111404426 A CN202111404426 A CN 202111404426A CN 114233223 B CN114233223 B CN 114233223B
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- 239000003245 coal Substances 0.000 title claims abstract description 41
- 238000007789 sealing Methods 0.000 claims abstract description 74
- 230000004323 axial length Effects 0.000 claims abstract description 4
- 239000007789 gas Substances 0.000 description 21
- 239000012530 fluid Substances 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 14
- 239000010959 steel Substances 0.000 description 14
- 238000005553 drilling Methods 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 239000011435 rock Substances 0.000 description 11
- 241001449342 Chlorocrambe hastata Species 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 238000003795 desorption Methods 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (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)
- Earth Drilling (AREA)
Abstract
The invention provides a pressure-maintaining quick coring device for a ground well coal stratum, which comprises a coring outer cylinder and a coring inner cylinder, wherein the coring outer cylinder is provided with a first through hole along the axial direction of the coring outer cylinder, the coring inner cylinder is sleeved in the first through hole, the axial length of the coring outer cylinder is longer than that of the coring inner cylinder, and one end of the coring outer cylinder is connected with a drill bit. The piston mechanism comprises a pressurizing part and a first pushing part, the pressurizing part comprises a connecting cylinder, a connecting seat and a sealing part, and the connecting cylinder and the coring outer cylinder keep a preset gap and are arranged in the coring outer cylinder; the first sealing valve is arranged at one end of the coring inner cylinder, which is close to the connecting seat, and a preset distance is kept between the first sealing valve and the first pushing part; the second sealing valve is arranged at the other end of the coring inner cylinder and is connected with the drill bit through the second pushing part.
Description
Technical Field
The invention belongs to the technical fields of unconventional natural gas exploration and development of coal bed gas, rock stratum gas and the like and coal mine safety, and particularly relates to a pressure-maintaining rapid coring device and method for a ground well coal stratum.
Background
The gas content investigation of the coal stratum is a precondition of unconventional natural gas exploration and development such as coal bed gas, rock stratum gas and the like, and also is a main work of evaluation after unconventional natural gas development; the gas content of the coal stratum is not only an important basis for unconventional natural gas resource estimation, productivity prediction and well pattern layout design, but also represents the dangerous degree of mine gas disasters. Production practice shows that the gas content is tested by adopting a conventional coring and desorption method, the tested gas content consists of three parts of loss gas content, desorption gas content and residual gas content, and the test result is obviously lower than the actual gas content in the coal stratum.
When the conventional method is adopted for coring, an open type coal rock core is used for coring, the coal rock core is lifted to the ground from the bottom of the well after being drilled, and in the process of disassembling the core and loading the coal rock core into a desorption tank on the ground, the coal rock core is exposed for a long time, so that a large amount of gas contained in the coal rock core is dissipated, and the gas loss amount compensated by fitting is estimated inaccurately in the later period, so that the gas content measurement result of the coal rock stratum is deviated.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide the pressure-maintaining rapid coring device for the ground well coal rock stratum, which solves the problems existing in the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme:
The utility model provides a quick coring device of ground well coal stratum pressurize, includes urceolus and the inner tube of coring, the urceolus of coring sets up first through-hole along its axial, and the inner tube cover of coring is located in the first through-hole, the axial length of urceolus of coring is greater than the inner tube of coring, the drill bit is connected to urceolus one end of coring, its characterized in that, quick coring device of ground well coal stratum pressurize still includes:
The piston mechanism comprises a pressurizing part and a first pushing part, the pressurizing part comprises a connecting cylinder, a connecting seat and a sealing part, and the connecting cylinder and the coring outer cylinder are arranged in the coring outer cylinder at preset gaps;
The connecting device comprises a connecting cylinder, a connecting seat, a first pushing part, a connecting rod, a connecting part and a connecting rod, wherein one end of the connecting cylinder is provided with the connecting part, a second through hole is arranged on the connecting part along the axial direction of the connecting part, the connecting seat is arranged in the connecting cylinder, a convex groove is arranged on the connecting seat and protrudes out of the connecting seat, the connecting seat is connected with the connecting part through the convex groove, the convex groove is communicated with the second through hole, a third through hole is arranged on the convex groove along the radial direction of the convex groove, the third through hole is communicated with a preset gap, one side, close to the convex groove, of the connecting seat is in sealing connection with the coring outer cylinder, a first pushing part is sleeved on one side, far away from the convex groove, and the first pushing part is connected with the coring outer cylinder through the connecting rod;
The first sealing valve is arranged at one end of the coring inner cylinder, which is close to the connecting seat, and a preset distance is kept between the first sealing valve and the first pushing part;
the second sealing valve is arranged at the other end of the coring inner cylinder and is connected with the drill bit through a second pushing part.
The connecting portion comprises a salvaging neck and a bearing seat which are sequentially connected, the salvaging neck protrudes out of the coring outer cylinder, the second through hole is formed in the salvaging neck, the bearing seat comprises an inner sleeve and an outer sleeve, the second through hole is communicated with the inner sleeve, the outer sleeve is connected with the connecting cylinder, the convex groove is connected with the inner sleeve, and a sealing ring is sleeved on one side, close to the convex groove, of the connecting seat.
The connecting seat is further provided with a fourth through hole along the radial direction of the connecting seat, the fourth through hole is communicated with the convex groove, the fourth through hole is communicated with a gap between the first pushing part and the coring outer cylinder, and a plugging ball is arranged between the fourth through hole and the third through hole.
At least one fifth through hole is formed in the drill bit along the axial direction of the drill bit, and the fifth through hole is communicated with the first through hole.
The first sealing valve is an analysis valve and comprises a valve body, a knob and a touch plate;
The valve body is communicated with the coring inner cylinder, a sixth through hole is formed in the barrel wall of the connecting cylinder, the knob is arranged in the sixth through hole and is communicated with the valve body, the touch plate is arranged on the barrel wall where the sixth through hole is located, and the linear distance between the touch plate and the knob is smaller than the preset distance.
The second sealing valve is a sealing ball valve and comprises a sealing valve body and two ball valve knobs, the sealing valve body is arranged at one end of the coring inner cylinder and is communicated with the coring inner cylinder, the second pushing part is sleeved on the sealing valve body, and the ball valve knobs are respectively arranged at two sides of the sealing valve body and are communicated with the second pushing part.
And a clamp spring is further arranged inside the coring inner cylinder along the radial direction of the coring inner cylinder.
The outer periphery of the salvaging neck is provided with a positioning buckle, the inner wall corresponding to the coring outer barrel is provided with a clamping groove, and the buckle is matched with the clamping groove.
Compared with the prior art, the invention has the following technical effects:
According to the pressure-maintaining rapid coring device for the ground well coal rock stratum, the piston mechanism is arranged in the coring outer cylinder, the pressurizing part of the piston mechanism can provide power for the first pushing part in the coring process, so that the first pushing part and the second pushing part are forced to move, the first sealing valve and the second sealing valve are respectively pushed to be closed, the two ends of the coring inner cylinder are sealed, a coal core in the coring inner cylinder is prevented from being exposed in air, and particularly, fluid is injected into the convex groove through the second through holes arranged on the connecting part, flows into a preset gap between the connecting cylinder and the coring outer cylinder through the third through holes, one side, close to the convex groove, of the connecting seat is in sealing connection with the coring outer cylinder through the pressure increase in the connecting seat, downward thrust is generated, the first pushing part can be broken along with the gradual enhancement of the thrust, the first pushing part moves downwards to be in contact with the first sealing valve inner cylinder under the action of the thrust, the first sealing valve is pushed to be closed, the fluid is injected into the convex groove through the second through holes, the pressure is pushed downwards to be in contact with the core, the coal core is prevented from being in contact with the two ends of the core, the core is prevented from being rapidly sealed, the accuracy of the core is improved, and the accuracy of the core is improved.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the pressure-maintaining quick coring device of the present invention;
FIG. 2 is a schematic view of the piston mechanism of the present invention;
FIG. 3 is a schematic view of the structure of the connecting base of the present invention;
FIG. 4 is a schematic view of the construction of the spearhead of the present invention;
FIG. 5 is a schematic view of the structure of the chain jar of the present invention;
FIG. 6 is a schematic view of the structure of the weighting bar of the present invention;
FIG. 7 is a flow chart of a coring process during application of the coring device of the present invention;
Fig. 8 is an application scenario diagram of the coring device of the present invention.
The meaning of each reference numeral in the figures is:
1-core outer cylinder, 2-core inner cylinder, 3-drill bit, 4-piston mechanism, 5-first sealing valve, 6-second sealing valve, 7-second pushing part, 8-plugging ball, 9-jump ring, 10-positioning buckle, 101-first through hole, 402-first pushing part, 41-connecting cylinder, 42-connecting seat, 44-connecting part, 45-second through hole, 46-tongue, 47-third through hole, 48-connecting rod, 49-sixth through hole, 411-salvaging neck, 412-bearing seat, 421-sealing ring, 422-fourth through hole, 301-fifth through hole, 501-valve body, 502-knob, 503-touching plate, 601-sealing valve body, 602-ball valve knob, 21-salvaging spearhead upper interface, 22-salvaging spearhead upper nipple, 23-salvaging spearhead shear pin, 24-gripper, 25-jar upper interface, 26-chain jar, 27-jar lower interface, 28-weighting rod upper interface, 29-weighting rod body, 30-weighting rod lower interface, 11-winch, 12-core winch, 14-quick-16-shaking pump, 16-drum, 14-well pump, 16-drum, mud pump, 16-pump, and high-speed drum.
The following examples illustrate the invention in further detail.
Detailed Description
The following specific embodiments of the present application are provided, and it should be noted that the present application is not limited to the following specific embodiments, and all equivalent changes made on the basis of the technical scheme of the present application fall within the protection scope of the present application.
Directional terms referred to herein, such as "axial", "radial", "upper", "lower" are consistent with a particular direction on a page in the drawings of the specification or a corresponding direction of space shown in the drawings.
Examples:
The utility model provides a quick coring device of ground well coal stratum pressurize, includes urceolus 1 and the inner tube 2 of coring, urceolus 1 of coring sets up first through-hole 101 along its axial, and the inner tube 2 cover of coring is located in the first through-hole 101, the axial length of urceolus 1 of coring is greater than the inner tube 2 of coring, drill bit 3 is connected to urceolus 1 one end of coring, quick coring device of ground well coal stratum pressurize still includes: the piston mechanism 4, the first sealing valve 5 and the second sealing valve 6 are arranged in the coring outer barrel 1 at one side far away from the drill bit 3, the piston mechanism 4 comprises a pressurizing part and a first pushing part 402, the pressurizing part comprises a connecting barrel 41, a connecting seat 42 and a sealing part, and the connecting barrel 41 and the coring outer barrel 1 are arranged in the coring outer barrel 1 with a preset gap;
A connecting part 44 is arranged at one end of the connecting cylinder 41, a second through hole 45 is arranged on the connecting part 44 along the axial direction of the connecting part, the connecting seat 42 is arranged in the connecting cylinder 41, a convex groove 46 is arranged on the connecting seat 42, the convex groove 46 protrudes out of the connecting seat 42, the connecting seat 42 is connected with the connecting part 44 through the convex groove 46, the convex groove 46 is communicated with the second through hole 45, a third through hole 47 is arranged on the convex groove 46 along the radial direction of the convex groove 46, the third through hole 47 is communicated with the preset gap, one side, close to the convex groove 46, of the connecting seat 42 is in sealing connection with the coring outer cylinder 1, a first pushing part 402 is sleeved on one side, far from the convex groove 46, of the connecting seat 42, and the first pushing part 402 is connected with the coring outer cylinder 1 through a connecting rod 48;
The first sealing valve 5 is arranged at one end of the coring inner cylinder 2 close to the connecting seat 42, and a preset distance is kept between the first sealing valve 5 and the first pushing part 402;
the second sealing valve 6 is arranged at the other end of the coring inner barrel 2, and the second sealing valve 6 is connected with the drill bit 3 through a second pushing part 7.
The invention relates to a pressure-maintaining quick coring device for a ground well coal stratum, which is characterized in that a piston mechanism is arranged in a coring outer cylinder, a pressurizing part of the piston mechanism can provide power for a first pushing part in the coring process, so that the first pushing part and a second pushing part are forced to move, respectively push a first sealing valve and a second sealing valve to be closed, the two ends of the coring inner cylinder are sealed, a coal core in the coring inner cylinder is prevented from being exposed in air, in particular, fluid is injected through a second through hole arranged on a connecting part, flows into a convex groove through the second through hole, and can enter a preset gap between a connecting cylinder 41 and the coring outer cylinder 1 through a third through hole, one side, close to the convex groove 46, of the connecting seat 42 is in sealing connection with the coring outer cylinder 1, after the preset gap is filled with the fluid, the pressure in the coring outer cylinder is increased, the pressure-maintaining quick coring device has the advantages that the pressure-maintaining quick coring device is compact in structure, can quickly perform pressure-maintaining sealing treatment on the two ends of the coring inner barrel in the coring process, effectively prevents a large amount of escape of gas contained in the coal core from contacting with the outside, causes inaccurate coal core gas content testing results, and improves accuracy of the coal core gas content testing.
The fluid in this embodiment is slurry.
As a preferred solution of this embodiment, the connecting portion 44 includes a salvaging neck 411 and a bearing seat 412 that are sequentially connected, the salvaging neck 411 protrudes out of the coring outer cylinder 1, the second through hole 45 is disposed in the salvaging neck 411, the bearing seat 412 includes an inner sleeve and an outer sleeve, the second through hole 45 is communicated with the inner sleeve, the outer sleeve is connected with the connecting cylinder 41, the convex groove 46 is connected with the inner sleeve, and a sealing ring 421 is sleeved on one side of the connecting seat 42 close to the convex groove 46.
According to the coring device, the coring device needs to be deeply penetrated into the bottom hole of a well by means of the steel wire operation string, the salvaging neck is used for being connected with the steel wire operation string, the lower end of the bearing seat 412 is related to the coring inner barrel through the connecting barrel, the ball in the bearing seat is contacted with the connecting seat, and when the connecting seat rotates along with the coring outer barrel and the drill rod, the coring inner barrel is prevented from rotating along with the coring outer barrel, double-barrel single action is realized, and the integrity and the sampling rate of coal cores are improved.
The wire work string in this embodiment consists of a spear, chain jar and weighting rod, as described in figures 3-5,
The sealing ring 421 plays a role in sealing and connecting the connecting seat 42 with the coring outer cylinder.
The fishing neck 411 is used for being connected with a fishing spearhead of a wire operation string, provides a connection point, and stretches the coring device into a well through the wire operation string to perform the coring operation of the coal core.
As a preferable solution of this embodiment, the connecting seat 42 is further provided with a fourth through hole 422 along a radial direction thereof, the fourth through hole 422 is communicated with the convex groove 46, the fourth through hole 422 is communicated with a gap between the first pushing portion 402 and the coring outer barrel 1, and a plugging ball 8 is disposed between the fourth through hole 422 and the third through hole 47.
When fluid flows into the convex groove through the second through hole, the fluid can continuously flow into the fourth through hole 422 through the convex groove, the fourth through hole 422 is communicated with the gap between the first pushing part 402 and the coring outer barrel 1, the fluid can enter the gap between the first pushing part 402 and the coring outer barrel 1, the fluid flows downwards to the drill bit along the inner wall of the coring outer barrel, the cooling treatment is carried out on the drill bit during working through the fluid, the working and the service life of the drill bit are protected, the plugging ball can plug and intercept the fluid between the fourth through hole 422 and the third through hole 47, the plugging ball is not required to be thrown in during the working of the drill bit, when the sealing pressure of the coring inner barrel is required to be maintained after the drilling of the coal core by the drill bit is finished, the plugging ball is thrown in through the second through hole 45, the fluid cannot flow out through the fourth through hole 422, the fluid can only enter the gap between the connecting barrel and the coring outer barrel through the third through hole 47, the pressure between the connecting barrel and the coring outer barrel is enhanced under the action of the sealing ring, and the pushing purpose is realized.
As a preferable mode of this embodiment, at least one fifth through hole 301 is provided in the drill 3 along the axial direction thereof, and the fifth through hole 301 communicates with the first through hole 101.
As a preferable solution of this embodiment, the first sealing valve 5 is an analysis valve, and includes a valve body 501, a knob 502, and a touch plate 503;
the valve body 501 is communicated with the coring inner cylinder 2, a sixth through hole 49 is formed in the barrel wall of the connecting cylinder 41, the knob 502 is arranged in the sixth through hole 49 and is communicated with the valve body 501, the touch plate 503 is arranged on the barrel wall where the sixth through hole 49 is located, and the linear distance between the touch plate 503 and the knob 502 is smaller than the preset distance.
When the first pushing part receives downward pushing force, the knob 502 is in contact with the touch plate 503, and the touch plate 503 applies upward pushing force to the knob 502 to close the knob 502, so that the purpose of closing the first sealing valve 5 is achieved.
The resolving valve in this embodiment is located at the end of the coring inner cylinder, and needs to be sleeved in the connecting cylinder, and the knob 502 is also installed in a single side direction, because the volume of the desorbing valve is limited, and the desorbing valve is only used for removing the liquid in the coring inner cylinder during coring drilling and is used as a gas channel during coal-core gas desorption, and the aperture of the valve is enough, so that the desorbing valve is only required to meet the air tightness requirement.
As a preferable solution of this embodiment, the second sealing valve 6 is a ball valve, and includes a sealing valve body 601 and two ball valve knobs 602, the sealing valve body 601 is disposed at one end of the coring inner cylinder 2 and is communicated with the coring inner cylinder 2, the second pushing portion 7 is sleeved on the sealing valve body 601, and the ball valve knobs 602 are respectively disposed at two sides of the sealing valve body 601 and are communicated with the second pushing portion 7.
When the second pushing part receives downward pushing force, the ball valve knob 602 is contacted with the second pushing part 7, the second pushing part 7 applies upward force to the ball valve knob 602, and the ball valve knob 602 rotates to be closed, so that the purpose of closing the second sealing valve 6 is realized.
The inner hole of the sealing ball valve is used as a core inlet channel, and the inner diameter of the inner hole is required; because the sealing ball valve may need to shear the coal core, the ball valve has a requirement on hardness; it is also required that it meets the air tightness requirement.
As a preferred solution of this embodiment, a snap spring 9 is further disposed inside the coring inner barrel 2 along the radial direction thereof.
The snap spring 9 is used for cutting the coal core entering the coring inner cylinder, so that the quality of the coal core is reduced, and the coal core is prevented from falling off from the coring inner cylinder due to the action of large gravity in the coring process.
As a preferable solution of this embodiment, the outer periphery of the fishing neck 411 is provided with a positioning buckle 10, and the inner wall corresponding to the core-taking outer cylinder 1 is provided with a buckle 10 matching with the clamping groove.
When the piston mechanism is placed into the coring content through the steel wire operation string, the positioning buckle is matched with the clamping groove to connect the piston mechanism with the coring outer barrel 1, so that the positioning function is achieved.
In this embodiment, the components of the coring device other than the coring outer barrel constitute the coring inner barrel assembly.
The working procedure of this embodiment is:
As shown in fig. 7:
(1) And carrying out the design of the construction parameters of the ground well according to the purpose of coring the coal rock layer of the ground well, geological topography and other conditions, and constructing the well drilling to the designed coring layer.
(2) After the flushing of the drilling holes is completed, all drilling tools in the well are lifted.
(3) According to the operation technical requirements, overhauling, maintaining and connecting the coring device, and ensuring that the first sealing valve and the second sealing valve are in an open state and the fluid channel is unblocked; after the inspection is completed, the core outer barrel of the core device is connected with the core drill rod in a matched mode, and then the core outer barrel is sent to a position of drilling design core.
(4) And conveying the coring inner barrel assembly into a designed position in the coring outer barrel at the bottom of the well through the steel wire operation string.
(5) And starting coring drilling. When the device is used for normal coring drilling, the drill rod transmits torque and axial pressure to the drilling tool coring outer barrel, the coring outer barrel drives the drill bit to rotationally drill for coring, meanwhile, the drill bit is provided with drilling pressure, the coring inner barrel does not rotate on the basis of the double-barrel single-action structural design, a single-action double-pipe drilling system is formed by the coring inner barrel and the coring outer barrel, and a coal core enters the coring inner barrel through the clamping spring under the actions of cutting and extrusion of an outer drill bit and friction of a threaded loop of an inner drill bit and a hole wall, and a desorption valve and a sealing ball valve of the coring inner barrel are in an open state in the process. The drilling medium fluid flows in from the inside of the drill rod, flows through the connecting seat, flows to the fifth through hole at the bottom of the drill bit from the gap between the first pushing part 402 and the core outer barrel 1 through the fourth through hole, cools the drill bit, and simultaneously carries coal dust to flow back to the ground through the annular gap between the well wall and the core outer barrel.
(6) And (3) plugging ball throwing operation, stopping the pump after the drilling footage reaches the design requirement, stopping rotating, throwing the plugging ball at the ground drill rod joint through the second through hole 45, waiting for 3-5 min, and waiting for the plugging ball to be located in the connecting seat of the coring device and plugging the fourth through hole.
(7) And (3) starting the slurry pump to pump, pressurizing and shearing the connecting rod, and allowing slurry to flow in from the interior of the drill rod, wherein the fluid flows to the hydraulic pushing head through the third through hole on the connecting seat as the passage of the fourth through hole is blocked by the blocking ball. Under the continuous pressurizing action of the slurry pump, the slurry pressure is gradually increased until the connecting rod is sheared, the piston mechanism is displaced downwards along the connecting seat under the action of the slurry high pressure and is transmitted to the first pushing part, the first pushing part obtains enough energy to move forwards and drives the coring inner barrel desorption valve and the sealing ball valve to be closed in a linkage way, and the in-situ sealing of the coring inner barrel at the bottom of the coal core hole is completed.
(8) After coring is completed, the coring inner barrel assembly of the well bottom pressure maintaining coring device is quickly lifted to the ground by adopting a steel wire working tool string, and the coring inner barrel is taken out after being disassembled.
(9) And (3) weighing and airtightness detection of the coring inner cylinder is carried out, whether the coring sample meets the requirements of quality and airtightness is judged, if the coring sample is qualified, field test is carried out, if the coring sample is unqualified or the coring measuring point is not the final measuring point, the coring inner cylinder and other parts are replaced, the coring inner cylinder assembly is assembled, and the operation is continued in the step (4).
Wherein, step (4) further comprises the following sub-steps:
1) The steel wire operation tool string is reliably linked, and the lower end of the fishing spearhead is pushed into the fishing neck of the closed coring device; checking the locating buckle below the salvaging neck, confirming that the locating buckle can be freely ejected and retracted, starting a winch system to lift the tool string, and sending the tool string into a coring drill rod in a well.
2) The feeding process of the coring inner barrel assembly is uniform, the speed is not more than 90m/min, whether the coring inner barrel assembly reaches the bottom of a drill rod and enters the coring outer barrel is closely observed, the weight of a tool string can be added to the outer barrel at the bottom end of a hole or an obstacle when the tool string completely reaches or meets the resistance, and the load of a steel wire can be obviously reduced.
3) Slowly lifting the tool string, wherein the lifting distance is not larger than the stroke of the chain jar, slowly lowering the tool string if the load of the winch system is unchanged, repeatedly slowly lifting the tool string, and indicating that the fishing neck positioning pin in the coring inner barrel assembly is correctly clamped into the clamping groove in the coring outer barrel if the load is obviously larger than the weight of the tool string.
4) A release (trip) operation is started. Rapidly lifting the steel wire working tool string, wherein the lifting distance is longer than the stroke of the chain type jar, and utilizing the weighting rod and the upper jar of the jar to shear the spear-head pin; if the load of the winch system is still obviously larger than the weight of the steel wire operation tool string, the slow down and quick up-lifting operation is repeated until the load of the winch system is obviously reduced, the steel wire operation tool string is lifted up and recovered, and the throwing operation is completed.
Wherein step (8) further comprises the sub-steps of:
1) The spearhead and the spearhead pin are installed and connected with the weighting rod. And (3) a steel wire operation tool string is put into the coring drill rod of the well bore, whether the casting and fishing tool reaches the preset position of the bottom coring inner barrel assembly or not is closely observed, and the load of the steel wire operation tool string can be obviously reduced when the steel wire operation tool string completely reaches or meets resistance.
2) When the wire work tool string reaches the bottom of the drill pipe, the load is obviously reduced. Slowly lifting the steel wire operation tool string by about 2m, quickly lowering, slowly lifting the tool string again, if the load is obviously increased, indicating that the coring device is successfully salvaged, and if the load is not obviously changed, repeating the above operation until the salvaging is successful.
3) And after the coring inner cylinder assembly reaches the ground, the coring inner cylinder assembly is dismounted, and the coring inner cylinder is taken out.
Claims (1)
1. The utility model provides a quick coring device of ground well coal stratum pressurize, includes urceolus (1) and the inner tube (2) of coring, urceolus (1) of coring sets up first through-hole (101) along its axial, and inner tube (2) of coring cover is located in first through-hole (101), the axial length of urceolus (1) of coring is greater than inner tube (2) of coring, drill bit (3) are connected to urceolus (1) one end of coring, its characterized in that, quick coring device of ground well coal stratum pressurize still includes:
The device comprises a piston mechanism (4), a first sealing valve (5) and a second sealing valve (6) which are arranged in a coring outer barrel (1) and far away from one side of a drill bit (3), wherein the piston mechanism (4) comprises a pressurizing part and a first pushing part (402), the pressurizing part comprises a connecting barrel (41), a connecting seat (42) and a sealing part, and a preset gap is kept between the connecting barrel (41) and the coring outer barrel (1) and is arranged in the coring outer barrel (1);
The connecting cylinder (41) is characterized in that a connecting part (44) is arranged at one end of the connecting cylinder (41), a second through hole (45) is formed in the connecting part (44) along the axial direction of the connecting part, a connecting seat (42) is arranged in the connecting cylinder (41), a convex groove (46) is formed in the connecting seat (42), the convex groove (46) protrudes out of the connecting seat (42), the connecting seat (42) is connected with the connecting part (44) through the convex groove (46), the convex groove (46) is communicated with the second through hole (45), a third through hole (47) is formed in the convex groove (46) along the radial direction of the convex groove, the third through hole (47) is communicated with the preset gap, one side, close to the convex groove (46), of the connecting seat (42) is in sealing connection with the coring outer cylinder (1), a first pushing part (402) is sleeved on one side, far away from the convex groove (46), and the first pushing part (402) is connected with the coring outer cylinder (1) through a connecting rod (48);
The first sealing valve (5) is arranged at one end, close to the connecting seat (42), of the coring inner barrel (2), and a preset distance is kept between the first sealing valve (5) and the first pushing part (402);
The second sealing valve (6) is arranged at the other end of the coring inner cylinder (2), and the second sealing valve (6) is connected with the drill bit (3) through a second pushing part (7);
the connecting part (44) comprises a salvaging neck (411) and a bearing seat (412) which are sequentially connected, the salvaging neck (411) protrudes out of the coring outer cylinder (1), a second through hole (45) is formed in the salvaging neck (411), the bearing seat (412) comprises an inner sleeve and an outer sleeve, the second through hole (45) is communicated with the inner sleeve, the outer sleeve is connected with the connecting cylinder (41), the convex groove (46) is connected with the inner sleeve, and a sealing ring (421) is sleeved on one side, close to the convex groove (46), of the connecting seat (42);
a fourth through hole (422) is further formed in the connecting seat (42) along the radial direction of the connecting seat, the fourth through hole (422) is communicated with the convex groove (46), the fourth through hole (422) is communicated with a gap between the first pushing part (402) and the coring outer cylinder (1), and a plugging ball (8) is arranged between the fourth through hole (422) and the third through hole (47);
At least one fifth through hole (301) is arranged on the drill bit (3) along the axial direction of the drill bit, and the fifth through hole (301) is communicated with the first through hole (101);
The first sealing valve (5) is an analysis valve and comprises a valve body (501), a knob (502) and a touch plate (503);
the valve body (501) is communicated with the coring inner cylinder (2), a sixth through hole (49) is formed in the barrel wall of the connecting cylinder (41), the knob (502) is arranged in the sixth through hole (49) and is communicated with the valve body (501), the touch plate (503) is arranged on the barrel wall where the sixth through hole (49) is located, and the linear distance between the touch plate (503) and the knob (502) is smaller than the preset distance;
The second sealing valve (6) is a sealing ball valve and comprises a sealing valve body (601) and two ball valve knobs (602), the sealing valve body (601) is arranged at one end of the coring inner cylinder (2) and is communicated with the coring inner cylinder (2), the second pushing part (7) is sleeved on the sealing valve body (601), and the ball valve knobs (602) are respectively arranged at two sides of the sealing valve body (601) and are communicated with the second pushing part (7);
a clamp spring (9) is further arranged inside the coring inner cylinder (2) along the radial direction of the coring inner cylinder;
the outer periphery of the salvaging neck (411) is provided with a positioning buckle (10), the inner wall corresponding to the coring outer barrel (1) is provided with a clamping groove, and the buckle (10) is matched with the clamping groove.
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| CN116006107B (en) * | 2023-01-03 | 2024-09-17 | 中煤科工西安研究院(集团)有限公司 | Preset plugging ball type airtight coring device and method |
| CN118292788B (en) * | 2024-06-06 | 2024-08-06 | 中国煤炭地质总局勘查研究总院 | Pressure maintaining coring device for deep coal seam |
Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2000824A (en) * | 1977-07-06 | 1979-01-17 | American Coldset Corp | Method and core barrel apparatus for obtaining and retrieving subterranean formation samples |
| US4256192A (en) * | 1979-07-06 | 1981-03-17 | Christensen, Inc. | Pressure core barrel |
| US5146998A (en) * | 1990-05-11 | 1992-09-15 | Qed Environmental Systems, Inc. | Apparatus and method for underground sampling |
| RU1808989C (en) * | 1990-12-17 | 1993-04-15 | Ю. Л.Таранько | Device for obtaining bottom samples |
| US5351765A (en) * | 1993-08-31 | 1994-10-04 | Baroid Technology, Inc. | Coring assembly and method |
| CN101118201A (en) * | 2006-08-02 | 2008-02-06 | 上海市城市建设设计研究院 | Rarefaction sludge sampler |
| CN101769134A (en) * | 2010-01-26 | 2010-07-07 | 煤炭科学研究总院西安研究院 | Sealing core drilling device for underground coal seams and application method thereof |
| CN203130003U (en) * | 2012-10-20 | 2013-08-14 | 中国石油化工股份有限公司 | Differential type air drilling coring device |
| CN104453759A (en) * | 2014-12-08 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Closed coring device for testing coal bed methane and rock formation gas contents in surface well drilling |
| CN204327018U (en) * | 2014-12-08 | 2015-05-13 | 中煤科工集团西安研究院有限公司 | A kind of ground drilling coal bed gas, rock stratum Gas content test sealing core drilling device |
| AU2016201854A1 (en) * | 2010-07-30 | 2016-04-21 | Globaltech Corporation Pty Ltd | Core orientation system |
| CN106567685A (en) * | 2016-10-28 | 2017-04-19 | 中煤科工集团西安研究院有限公司 | Ground coal bed sealed core-drilling gas content testing device and method |
| CN107816328A (en) * | 2017-11-13 | 2018-03-20 | 四川川庆石油钻采科技有限公司 | A kind of hermetic core taking tool and sealing core drill technique |
| CN110552644A (en) * | 2019-10-05 | 2019-12-10 | 中国石油大学(华东) | In-situ coal rock heat-preservation pressure-maintaining coring device and application method |
| CN111485841A (en) * | 2020-04-21 | 2020-08-04 | 中煤科工集团西安研究院有限公司 | Coal mine underground long-distance fixed-point in-situ closed coring device and method |
| CN113653455A (en) * | 2021-10-19 | 2021-11-16 | 中煤科工集团西安研究院有限公司 | Coal seam and soft rock stratum drilling while-drilling airtight coring device and method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6095217B2 (en) * | 2013-03-15 | 2017-03-15 | 国立研究開発法人海洋研究開発機構 | Core sampling device and container transfer device |
-
2021
- 2021-11-24 CN CN202111404426.XA patent/CN114233223B/en active Active
Patent Citations (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2000824A (en) * | 1977-07-06 | 1979-01-17 | American Coldset Corp | Method and core barrel apparatus for obtaining and retrieving subterranean formation samples |
| US4256192A (en) * | 1979-07-06 | 1981-03-17 | Christensen, Inc. | Pressure core barrel |
| US5146998A (en) * | 1990-05-11 | 1992-09-15 | Qed Environmental Systems, Inc. | Apparatus and method for underground sampling |
| RU1808989C (en) * | 1990-12-17 | 1993-04-15 | Ю. Л.Таранько | Device for obtaining bottom samples |
| US5351765A (en) * | 1993-08-31 | 1994-10-04 | Baroid Technology, Inc. | Coring assembly and method |
| CN101118201A (en) * | 2006-08-02 | 2008-02-06 | 上海市城市建设设计研究院 | Rarefaction sludge sampler |
| CN101769134A (en) * | 2010-01-26 | 2010-07-07 | 煤炭科学研究总院西安研究院 | Sealing core drilling device for underground coal seams and application method thereof |
| AU2016201854A1 (en) * | 2010-07-30 | 2016-04-21 | Globaltech Corporation Pty Ltd | Core orientation system |
| CN203130003U (en) * | 2012-10-20 | 2013-08-14 | 中国石油化工股份有限公司 | Differential type air drilling coring device |
| CN104453759A (en) * | 2014-12-08 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Closed coring device for testing coal bed methane and rock formation gas contents in surface well drilling |
| CN204327018U (en) * | 2014-12-08 | 2015-05-13 | 中煤科工集团西安研究院有限公司 | A kind of ground drilling coal bed gas, rock stratum Gas content test sealing core drilling device |
| CN106567685A (en) * | 2016-10-28 | 2017-04-19 | 中煤科工集团西安研究院有限公司 | Ground coal bed sealed core-drilling gas content testing device and method |
| CN107816328A (en) * | 2017-11-13 | 2018-03-20 | 四川川庆石油钻采科技有限公司 | A kind of hermetic core taking tool and sealing core drill technique |
| CN110552644A (en) * | 2019-10-05 | 2019-12-10 | 中国石油大学(华东) | In-situ coal rock heat-preservation pressure-maintaining coring device and application method |
| CN111485841A (en) * | 2020-04-21 | 2020-08-04 | 中煤科工集团西安研究院有限公司 | Coal mine underground long-distance fixed-point in-situ closed coring device and method |
| CN113653455A (en) * | 2021-10-19 | 2021-11-16 | 中煤科工集团西安研究院有限公司 | Coal seam and soft rock stratum drilling while-drilling airtight coring device and method |
Non-Patent Citations (2)
| Title |
|---|
| 深层超深层煤层气保压取心工具设计;王西贵;邹德永;杨立文;刘笑傲;;石油机械;20200110;第48卷(第1期);第40-45页 * |
| 煤层密闭取心瓦斯含量测试技术及其在定向长钻孔中的应用;龙威成;;河南理工大学学报(自然科学版);20180831;第37卷(第6期);第16-21页 * |
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