CN115162989B - Lifting drilling type pressure maintaining coring drilling tool - Google Patents
Lifting drilling type pressure maintaining coring drilling tool Download PDFInfo
- Publication number
- CN115162989B CN115162989B CN202211002526.4A CN202211002526A CN115162989B CN 115162989 B CN115162989 B CN 115162989B CN 202211002526 A CN202211002526 A CN 202211002526A CN 115162989 B CN115162989 B CN 115162989B
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- Prior art keywords
- seat
- coring
- ball
- ball valve
- pressure maintaining
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- 238000005553 drilling Methods 0.000 title claims abstract description 55
- 230000007246 mechanism Effects 0.000 claims abstract description 35
- 238000007789 sealing Methods 0.000 claims abstract description 13
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 230000009471 action Effects 0.000 claims abstract description 7
- 239000007788 liquid Substances 0.000 claims abstract description 6
- 238000002347 injection Methods 0.000 claims abstract description 3
- 239000007924 injection Substances 0.000 claims abstract description 3
- 239000003638 chemical reducing agent Substances 0.000 claims description 22
- 238000005070 sampling Methods 0.000 claims description 22
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 238000009530 blood pressure measurement Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 7
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000012530 fluid Substances 0.000 description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- 238000010008 shearing Methods 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- -1 natural gas hydrates Chemical class 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000007306 turnover Effects 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
- E21B25/10—Formed core retaining or severing means
Landscapes
- 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 discloses a lifting drilling type pressure maintaining coring drilling tool, and relates to the technical field of pressure maintaining coring drilling tools; the device comprises an outer tube assembly and an inner tube assembly arranged in the outer tube assembly; the inner pipe assembly comprises a piston mechanism, a piston limiting mechanism and a pressure maintaining and coring mechanism, wherein the piston mechanism can realize liquid path conversion through ball injection, and then the pressure maintaining and coring mechanism is driven to move upwards under the action of pressure difference; the pressure maintaining coring mechanism can realize sealing after coring through rotation of the ball valve. The lifting drilling type pressure maintaining coring drilling tool provided by the invention realizes liquid path conversion by throwing the ball, and utilizes hydraulic pressure to lift the inner drilling tool assembly, so that the lifting drilling type pressure maintaining coring drilling tool is reliable in structure and high in success rate.
Description
Technical Field
The invention relates to the technical field of pressure-maintaining coring drilling tools, in particular to a drilling lifting pressure-maintaining coring drilling tool.
Background
In the resource exploration process, the accuracy of the parameters for reserve evaluation is solved, a calculation basis is provided for production, and it is important to quickly and effectively acquire stratum cores. At present, shale gas exploration and coal bed gas exploration and sampling are carried out by adopting a common rope to salvage a core drilling tool to obtain a sample, and the gas storage capacity of a target layer is evaluated according to the analysis result of the obtained sample. With the rapid development of society, conventional fossil energy supply is becoming more and more intense, and the demand for exploration and development of unconventional shale gas, coalbed methane and natural gas hydrates is increasing. In strata such as coal bed gas, shale gas and the like, a rope coring process is not needed, a drilling and coring process is carried out, and pressure maintaining and coring are carried out at the same time. And the lifting and coring step is to completely lift out all drilling tools in the hole when the drilling bit reaches a coring point, replace the drilling tools with the coring tools, drill down for coring, take out all the drilling tools in the hole to the ground surface again after coring is completed, replace the drilling tools with full-scale pilot bits for continuous pilot drilling, and reciprocate in this way until all the coring plans are completed. In the process of extracting the drill and coring, the inner diameter of the sampling tube is larger, and the pressure maintaining and coring also provides requirements on a sealing mode. The current pressure-maintaining coring drilling tool structure cannot meet the required sealing requirement, for example, the patent document with the application number of 202023171812.2, the ball valve overturning sealing core tube is turned over by means of the instantaneous resilience force of the spring, the requirement on spring type selection is high, the structure is unreliable, and the pressure-maintaining success rate is low.
Disclosure of Invention
The invention aims to provide a lifting drilling type pressure maintaining coring drilling tool, which solves the problems in the prior art, realizes liquid path conversion by throwing balls, and utilizes hydraulic pressure to lift an inner drilling tool assembly, and has reliable structure and high success rate.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides a lifting drilling type pressure maintaining coring drilling tool, which comprises an outer pipe assembly and an inner pipe assembly arranged in the outer pipe assembly; the inner pipe assembly comprises a piston mechanism, a piston limiting mechanism and a pressure maintaining and coring mechanism, wherein the piston mechanism can realize liquid path conversion through ball injection, and then the pressure maintaining and coring mechanism is driven to move upwards under the action of pressure difference; the pressure maintaining coring mechanism can realize sealing after coring through rotation of the ball valve.
Optionally, the outer tube assembly includes the reducing joint that the upper end is used for connecting the drilling rod, the reducing joint lower extreme threaded connection has first outer tube, second outer tube, centralizer, third outer tube and drill bit in proper order.
Optionally, the piston mechanism comprises a hollow piston rod, one end of the piston rod, which is far away from the reducer union, is in threaded connection with a ball seat, and the ball seat is connected with the pressure maintaining and coring mechanism; a runner is arranged at the position of the side wall where the ball seat is connected and overlapped with the piston rod; the connecting position of the first outer pipe and the second outer pipe is fixedly clamped with a spring pin seat, the piston rod penetrates through the spring pin seat, and the outer side above the piston rod is fixedly connected with the inner wall of the reducer union through a shear pin; the inner side of the spring pin seat is connected with a spring pin mechanism through a spring, a groove is formed in the outer wall of the piston rod, which is close to one end of the ball seat, in a ring mode, and the spring pin mechanism can be clamped in the groove; the first outer tube is provided with a water outlet, the piston rod is provided with a conversion runner, and the conversion runner and the water outlet are both positioned between the reducer union and the spring pin seat.
Optionally, the piston rod outer wall fixed ring is equipped with the limit flange, the limit flange is located the reducing joint with the bullet pin seat between.
Optionally, the ball seat is fixedly provided with first bearing with piston rod hookup location department, the nut fixedly connected with copper sheathing and the second bearing of ball seat lower extreme.
Optionally, the pressure maintaining coring mechanism comprises a first reducing part in threaded connection with the bottom of the ball seat, and the copper sleeve and the second bearing are positioned in an inner space at the joint of the first reducing part and the ball seat; the end, far away from the ball seat, of the first variable diameter penetrates through the second variable diameter and then is connected with an inner tube, a sampling tube and a clamping spring seat, and the clamping spring seat is provided with a clamping spring; the second diameter-changing pipe is sequentially connected with a middle pipe and a ball valve seat in a threaded manner; the ball valve seat is internally and movably provided with a ball valve, two ends of the ball valve seat are symmetrically provided with an upper ball valve seal and a lower ball valve seal, and the upper ball valve seal and the lower ball valve seal can limit and seal the ball valve; the sampling tube can penetrate through the through hole of the ball valve, and after the sampling tube passes through the through hole of the ball valve in an upward way, the ball valve is driven to overturn so as to realize pressure maintaining and coring; the core extraction and drilling process can extract large-diameter core, and is suitable for the core-taking requirements of heavy-point intervals such as coalbed methane, shale gas and the like. The ball throwing is adopted to build pressure to change a slurry flow channel, the piston rod is lifted by hydraulic pressure generated by pressure difference, and corresponding state limiting is carried out by the shearing pin and the spring pin mechanism, so that the device is more reliable in comparison with the spring rebound force, more clear in logic and high in lifting power; compared with the fishing spear assembly, the method has the advantages that the sampling tube is lifted more efficiently, the step of lowering the fisher into the well is reduced, and the coring time is shortened.
Optionally, the inboard fixed joint of inner tube and sampling tube hookup position department has the temperature and pressure record appearance seat, fixed mounting has the temperature and pressure record appearance on the temperature and pressure record appearance seat.
Optionally, one end of the first diameter changing away from the ball seat passes through the second diameter changing and then is in threaded connection with a pressure measuring diameter changing, and a pressure measuring joint is arranged in a flow passage with the pressure measuring diameter changing; the pressure measurement reducing is connected with an inner pipe, a sampling pipe and a clamp spring seat in sequence in a threaded manner.
Optionally, the inboard of centralizer and third outer tube hookup location department is fixedly provided with the bearing frame, bearing frame and bearing fixation nut fixedly connected with third bearing, second reducing one end wears to locate in the third bearing, just bearing frame and bearing fixation nut can carry out the axial spacing to the second reducing.
Compared with the prior art, the invention has the following technical effects:
the invention has a unique lifting mode of the inner drilling tool, adopts ball throwing to hold pressure to change a slurry flow passage, lifts a piston rod through hydraulic pressure generated by pressure difference, and carries out corresponding state limiting through a shearing pin and a spring pin mechanism so as to realize continuous operation of lifting, locking and sealing of the inner drilling tool. The invention has a unique sealing structure, and seals are designed at the positions of the reducer union, the outer pipe, the piston rod, the spring pin seat, the reducing, the middle pipe, the ball valve and the like according to the displacement and the structural requirement of the drilling tool, so that the in-situ pressure inside the middle pipe is saved, and the pressure maintaining and coring are realized. Large diameter cores may be drilled. The core extracting and coring process does not need to consider the inner diameter of the upper drill rod like the rope core extracting process, and can enlarge the inner diameter of the sample tube of the core extracting drilling tool to obtain a core with a larger diameter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a pressure maintaining coring drilling tool according to the present invention;
FIG. 2 is a schematic diagram showing the state of the lifting drilling type pressure maintaining core drill during ball throwing and pressure holding;
FIG. 3 is an enlarged partial schematic view of FIG. 1 in accordance with the present invention;
FIG. 4 is an enlarged partial schematic view of FIG. 2 in accordance with the present invention;
reference numerals illustrate: 1-reducer union, 1-1-shear pin, 2-first outer tube, 2-1-drain, 3-second outer tube, 4-centralizer, 5-third outer tube, 6-drill bit, 7-piston rod, 7-1-transition runner, 8-bullet pin holder, 9-bullet pin mechanism, 10-ball seat, 11-runner, 12-first bearing, 13-copper sleeve, 14-second bearing, 15-first reducer, 16-bearing retainer nut, 17-bearing seat, 18-third bearing, 19-second reducer, 20-pressure tap, 21-pressure reducer, 22-middle tube, 23-inner tube, 24-thermo-recorder, 25-thermo-recorder seat, 26-sampling tube, 27-ball valve seat, 28-upper seal, 29-ball valve, 30-lower ball valve seal, 31-snap spring, 32-snap seat, and steel ball.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a lifting drilling type pressure maintaining coring drilling tool, which solves the problems in the prior art, realizes liquid path conversion by throwing balls, and utilizes hydraulic pressure to lift an inner drilling tool assembly, and has reliable structure and high success rate.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
The invention provides a lifting drill type pressure maintaining coring drilling tool, which is suitable for a lifting drill type coring process, as shown in figures 1, 2, 3 and 4, and comprises an outer pipe assembly and an inner pipe assembly, wherein the outer pipe assembly comprises a reducing joint 1, a first outer pipe 2, a second outer pipe 3, a centralizer 4, a third outer pipe 5, a drill bit 6, a shearing pin 1-1 and a water outlet 2-1; the inner tube assembly comprises a piston rod 7, a conversion runner 7-1, a spring pin seat 8, a spring pin mechanism 9, a ball seat 10, a runner 11, a first bearing 12, a copper sleeve 13, a second bearing 14, a first reducing 15, a bearing fixing nut 16, a bearing seat 17, a third bearing 18, a second reducing 19, a pressure measuring joint 20, a pressure measuring reducing 21, a middle tube 22, an inner tube 23, a temperature and pressure recorder 24, a temperature and pressure recorder seat 25, a sampling tube 26, a ball valve seat 27, an upper ball valve seal 28, a ball valve 29, a lower ball valve seal 30, a clamp spring 31 and a clamp spring seat 32.
Specifically, the upper end of the reducer union 1 is connected with a drill rod, and the inner side of the reducer union 1 is provided with a piston rod 7 through a shear pin 1-1; the reducer union 1, the first outer tube 2, the second outer tube 3, the centralizer 4, the third outer tube 5 and the drill bit 6 are connected through threads; the elastic pin seat 8 is fixed by double tops through the first outer tube 2 and the second outer tube 3; the spring pin mechanism 9 performs telescopic action through a spring, and then can be clamped in the groove of the piston rod to limit the piston rod; the ball seat 10 is in threaded connection with the piston rod 7, the first bearing 12 is extruded and fixed, and a nut at the lower end of the ball seat 10 fixes the copper sleeve 13 and the second bearing 14; the ball seat 10 is connected with the first reducing 15 through threads; the bearing seat 17 is fixed by double jacking through the centralizer 4 and the third outer tube 5, the bearing seat 17 and the bearing fixing nut 16 together fix the third bearing 18, and the bearing seat 17 and the bearing fixing nut 16 axially limit the second reducing 19; the first diameter-changing 15 is connected with the pressure measuring diameter-changing 21 through threads, and the pressure measuring joint 20 realizes pressure measurement of the sampling tube 26 through a flow passage on the pressure measuring diameter-changing 21; the second reducing 19, the middle pipe 22 and the ball valve seat 27 are connected through threads; the pressure measuring variable diameter 21, the inner pipe 23, the sampling pipe 26 and the clamp spring seat 32 are connected through threads; the inner tube 23 and the sampling tube 26 are used for carrying out double-top fixation on the temperature and pressure recorder seat 25, and the temperature and pressure recorder 24 is arranged on the temperature and pressure recorder seat 25; the upper ball valve seal 28 and the lower ball valve seal 30 fix and seal the ball valve 29, and can be assembled with the ball valve seat 27 in a modularized manner; the snap spring 31 sits on the snap spring seat 32.
During the working of the invention, in the normal drilling process, the upper end of the reducer union 1 is connected with a drill rod, the reducer union 1 and the piston rod 7 are fixed through the shear pin 1-1, the piston structure is positioned at the lower end of the first outer tube 2, drilling fluid flows through the middle hole of the piston rod 7, the middle hole of the ball seat 10, the flow passage 11, the water hole on the bearing seat 17, and the annular space between the outer tube and the middle tube 22 flows out from the drill bit water hole. Because the reducer union 1, the first outer tube 2, the piston rod 7 and the spring pin seat 8 are in a sealing design, the drilling fluid only flows out of the middle hole of the piston rod 7, and because the second reducer 19 and the middle tube 22 are in a sealing design, the drilling fluid cannot enter the middle tube 22.
After the drilling tool is drilled into the footgauge and the core is removed, the pump is stopped, the steel ball is thrown from the wellhead and is subjected to ball throwing pressure building, as shown in fig. 2 and 4, after the steel ball 33 passes through the piston rod 7, the steel ball is finally located on the ball seat 10 and is subjected to slurry filling, drilling fluid cannot flow out of a hole in the piston rod 7 due to the existence of the steel ball 33, further pressure building is caused in an appliance, high pressure is formed in a gap between the piston rod 7 and the first outer tube 2 through the conversion flow channel 7-1, a pressure difference is formed between the high pressure building and the drilling tool and slurry outside, and under the action of the pressure difference, the shearing pin 1-1 of the shearing mechanism is sheared to push the piston rod 7 to move upwards, and the drilling fluid is discharged through the water outlet 2-1. The piston rod 7 can rise to the lower end face of the reducer union 1 in a short time, and at the moment, the spring pin mechanism 9 is clamped in a groove on the piston rod 7, so that locking and limiting are realized. The piston rod 7 drives the ball seat 10, the pressure measuring reducing 21 and the inner drilling tools below the ball seat, a sealing groove on the pressure measuring reducing 21 and the second reducing 19 form sealing, the sampling tube 26 passes through the ball valve 29 to the upper part of the ball valve, the ball valve 29 takes a fixing bolt arranged on the ball valve seat 27 as a rotating shaft, meanwhile, a large torsion spring is arranged between the ball valve seat 27 and the ball valve 29, and when the sampling tube 26 is not lifted, the sampling tube 26 is inserted into a through hole of the ball valve 29, so that the sampling tube 26 limits the overturning of the large torsion spring; after the sampling tube 26 is lifted to be separated from the ball valve 29 by the ball valve 29, the ball valve 29 is turned under the action of the torsion spring with large torsion, the through hole of the ball valve 29 is driven to turn over by 90 degrees, sealing is achieved, and at the moment, the second reducing 19, the middle tube 22, the ball valve seat 27 and the ball valve 29 form a pressure-maintaining closed cavity, so that pressure-maintaining and coring are achieved. After the pressure maintaining action is completed, the underground drilling tool is lifted up, and pressure maintaining and coring are realized.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (4)
1. The utility model provides a carry boring pressurize coring drilling tool which characterized in that: the device comprises an outer tube assembly and an inner tube assembly arranged in the outer tube assembly; the inner pipe assembly comprises a piston mechanism, a piston limiting mechanism and a pressure maintaining and coring mechanism, wherein the piston mechanism can realize liquid path conversion through ball injection, and then the pressure maintaining and coring mechanism is driven to move upwards under the action of pressure difference; the pressure maintaining and coring mechanism can realize sealing after coring through the rotation of the ball valve; the outer pipe assembly comprises a reducer union, the upper end of which is used for connecting a drill rod, and the lower end of the reducer union is sequentially connected with a first outer pipe, a second outer pipe, a centralizer, a third outer pipe and a drill bit in a threaded manner; the piston mechanism comprises a hollow piston rod, one end of the piston rod, which is far away from the reducer union, is in threaded connection with a ball seat, and the ball seat is connected with the pressure maintaining and coring mechanism; a runner is arranged at the position of the side wall where the ball seat is connected and overlapped with the piston rod; the connecting position of the first outer pipe and the second outer pipe is fixedly clamped with a spring pin seat, the piston rod penetrates through the spring pin seat, and the outer side above the piston rod is fixedly connected with the inner wall of the reducer union through a shear pin; the inner side of the spring pin seat is connected with a spring pin mechanism through a spring, a groove is formed in the outer wall of the piston rod, which is close to one end of the ball seat, in a ring mode, and the spring pin mechanism can be clamped in the groove; a water outlet is formed in the first outer tube, a conversion flow passage is formed in the piston rod, and the conversion flow passage and the water outlet are both positioned between the reducer union and the spring pin seat; the connecting position of the ball seat and the piston rod is fixedly provided with a first bearing, and a nut at the lower end of the ball seat is fixedly connected with a copper sleeve and a second bearing; the pressure maintaining coring mechanism comprises a first reducing which is in threaded connection with the bottom of the ball seat, and the copper sleeve and the second bearing are positioned in an inner space at the joint of the first reducing and the ball seat; the end, far away from the ball seat, of the first variable diameter penetrates through the second variable diameter and then is connected with an inner tube, a sampling tube and a clamping spring seat, and the clamping spring seat is provided with a clamping spring; the second diameter-changing pipe is sequentially connected with a middle pipe and a ball valve seat in a threaded manner; the ball valve seat is internally and movably provided with a ball valve, two ends of the ball valve seat are symmetrically provided with an upper ball valve seal and a lower ball valve seal, and the upper ball valve seal and the lower ball valve seal can limit and seal the ball valve; the sampling tube can be arranged in the through hole of the ball valve in a penetrating way; the inner side of the connection position of the centralizer and the third outer tube is fixedly provided with a bearing seat, the bearing seat and a bearing fixing nut are fixedly connected with a third bearing, one end of the second diameter variation is penetrated in the third bearing, and the bearing seat and the bearing fixing nut can axially limit the second diameter variation.
2. The drill lifting pressure maintaining coring drilling tool of claim 1, wherein: the piston rod outer wall fixed ring is provided with a limit flange, and the limit flange is positioned between the reducer union and the spring pin seat.
3. The drill lifting pressure maintaining coring drilling tool of claim 1, wherein: the inner side of the connecting position of the inner tube and the sampling tube is fixedly clamped with a temperature and pressure recorder seat, and a temperature and pressure recorder is fixedly arranged on the temperature and pressure recorder seat.
4. The drill lifting pressure maintaining coring drilling tool of claim 1, wherein: the end, far away from the ball seat, of the first variable diameter penetrates through the second variable diameter and then is connected with a pressure measuring variable diameter through threads, and a pressure measuring joint is arranged in a flow passage with the pressure measuring variable diameter; the pressure measurement reducing is connected with an inner pipe, a sampling pipe and a clamp spring seat in sequence in a threaded manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002526.4A CN115162989B (en) | 2022-08-22 | 2022-08-22 | Lifting drilling type pressure maintaining coring drilling tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002526.4A CN115162989B (en) | 2022-08-22 | 2022-08-22 | Lifting drilling type pressure maintaining coring drilling tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115162989A CN115162989A (en) | 2022-10-11 |
| CN115162989B true CN115162989B (en) | 2023-10-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211002526.4A Active CN115162989B (en) | 2022-08-22 | 2022-08-22 | Lifting drilling type pressure maintaining coring drilling tool |
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| Country | Link |
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| CN (1) | CN115162989B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204299520U (en) * | 2014-10-23 | 2015-04-29 | 中国石油集团长城钻探工程有限公司 | One is cored and is used pressurizing adaptor |
| CN105041252A (en) * | 2015-07-30 | 2015-11-11 | 中国石油集团长城钻探工程有限公司 | Internally-lifting safety assembly for pressure-maintaining coring |
| CN106014315A (en) * | 2016-07-18 | 2016-10-12 | 中国石油集团西部钻探工程有限公司 | Hydraulic locking-type coring apparatus |
| CN112627755A (en) * | 2020-12-25 | 2021-04-09 | 吉林大学 | Lifting drilling type large-diameter well bottom in-situ pressure maintaining coring drilling tool |
| CN113356779A (en) * | 2021-07-14 | 2021-09-07 | 西南石油大学 | Coring device and coring method |
-
2022
- 2022-08-22 CN CN202211002526.4A patent/CN115162989B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204299520U (en) * | 2014-10-23 | 2015-04-29 | 中国石油集团长城钻探工程有限公司 | One is cored and is used pressurizing adaptor |
| CN105041252A (en) * | 2015-07-30 | 2015-11-11 | 中国石油集团长城钻探工程有限公司 | Internally-lifting safety assembly for pressure-maintaining coring |
| CN106014315A (en) * | 2016-07-18 | 2016-10-12 | 中国石油集团西部钻探工程有限公司 | Hydraulic locking-type coring apparatus |
| CN112627755A (en) * | 2020-12-25 | 2021-04-09 | 吉林大学 | Lifting drilling type large-diameter well bottom in-situ pressure maintaining coring drilling tool |
| CN113356779A (en) * | 2021-07-14 | 2021-09-07 | 西南石油大学 | Coring device and coring method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115162989A (en) | 2022-10-11 |
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