CN111878002B - A loosening spring for a downhole pipe coupling - Google Patents
A loosening spring for a downhole pipe coupling Download PDFInfo
- Publication number
- CN111878002B CN111878002B CN202010750734.7A CN202010750734A CN111878002B CN 111878002 B CN111878002 B CN 111878002B CN 202010750734 A CN202010750734 A CN 202010750734A CN 111878002 B CN111878002 B CN 111878002B
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- shell
- column
- porous
- joint
- partition board
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- 230000008878 coupling Effects 0.000 title claims abstract description 24
- 238000010168 coupling process Methods 0.000 title claims abstract description 24
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 24
- 238000005192 partition Methods 0.000 claims abstract description 31
- 238000005474 detonation Methods 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 16
- 238000005336 cracking Methods 0.000 claims abstract description 9
- 239000002360 explosive Substances 0.000 claims description 33
- 230000000694 effects Effects 0.000 claims description 8
- 230000000977 initiatory effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 239000002861 polymer material Substances 0.000 claims description 3
- 238000004880 explosion Methods 0.000 claims description 2
- 239000003814 drug Substances 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 4
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
- 238000004804 winding 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/021—Devices for subsurface connecting or disconnecting by rotation
-
- 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells operated by fluid means, e.g. actuated by explosion
Landscapes
- 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)
- Geophysics And Detection Of Objects (AREA)
Abstract
The invention discloses a loose bomb for a downhole tubular column coupling, which comprises a connecting joint, a partition board detonating joint, a porous charge shell and a tail, wherein the connecting joint, the partition board detonating joint, the porous charge shell and the tail are coaxially arranged in sequence from top to bottom, a coaxial detonating cord is arranged in a through hole in the center of the connecting joint, the partition board detonating joint comprises a cylindrical side wall and a bottom plate, a sealing cavity is formed between the bottom end of the connecting joint and the bottom plate, a perforating bomb is arranged in the sealing cavity, the top of the perforating bomb is contacted with the detonating cord, a circumferential pre-cracking groove is formed in the outer wall of the cylindrical side wall, a plurality of through holes are formed in the side wall of the porous charge shell, a main charge column and a simulated charge column are arranged in the porous charge shell from top to bottom, the dosage of the main charge column can be adjusted by adjusting the height of the simulated charge column, the tail is of a conical hollow structure, and a groove which is circumferentially arranged in the outer wall of the tail. The release buckle bullet adopts a partition board detonation technology, and is exposed to charge for releasing the buckle of the underground pipe column coupling.
Description
Technical Field
The invention belongs to the field of underground pipe column jamming accident treatment, and particularly relates to a trip bomb for an underground pipe column coupling.
Background
In construction operations in other fields such as oil and gas wells, a down-hole tubular column frequently suffers from a clamping accident. The common treatment means for solving the problem of the clamping accident are pipe column loosening and pipe column cutting, the pipe column cutting cannot realize the recovery of the whole pipe column, the pipe column has a destructive effect, the pipe column coupling is loosened, the pipe column cannot be damaged, and the repeated use function of the pipe column can be realized.
The existing loose buckle bullet adopts a detonating cord winding structure, has poor pressure-bearing sealing performance, is complex in construction operation and customized according to different well requirements, and increases construction period and construction difficulty.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a release buckle bullet for a downhole tubular column coupling, which adopts a baffle detonation technology, exposed charge, a shell designed into a sieve tube and a release buckle bullet with adjustable dosage, so as to realize the purpose of releasing the downhole tubular column.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a loose fastener for underground pipe column coupling comprises a connecting joint, a partition board detonating joint, a porous charging shell and a tail, which are coaxially arranged in sequence from top to bottom;
The connecting joint is connected with the partition board detonation joint, and a plurality of sealing rings are arranged between the outer wall of the lower part of the connecting joint and the inner wall of the upper part of the partition board detonation joint;
the baffle detonation joint comprises a cylindrical side wall and a bottom plate, a sealing cavity is formed between the bottom end of the connecting joint and the bottom plate, a perforating bullet is arranged in the sealing cavity, and the top of the perforating bullet is contacted with the detonating cord;
The upper end of the porous charging shell is connected with the outer wall of the lower part of the partition board detonation joint, and the side wall of the contact position of the porous charging shell and the partition board detonation joint is provided with a retaining screw;
the tail of the bullet is of a conical hollow structure, a groove distributed along the circumferential direction is formed in the outer wall of the tail of the bullet, and the tail of the bullet is in threaded connection with the lower end of the porous charging shell and is provided with a retaining screw.
The invention also comprises the following technical characteristics:
specifically, the perforating bullet comprises a perforating bullet shell, an initiating explosive located at the upper end of the perforating bullet shell, a main charge and a shaped charge liner located in the shell, and the initiating explosive is in contact with the lower end of the detonating cord.
Specifically, the bottom plate thickness of baffle detonation joint is 3mm.
Specifically, among the plurality of through holes on the porous charge shell, four top through holes are arranged at the uppermost end, the four top through holes are uniformly distributed along the circumference of the porous charge shell, a group of through holes which are distributed at equal intervals along a 60-degree spiral are arranged below each top through hole, and the spiral directions of the groups of through holes which are spirally distributed below the four top through holes are consistent.
Specifically, the diameter of the through hole is 10mm, the distance between the top through hole and the upper retaining screw is 20mm, and the vertical distance between the through holes is 10mm.
Specifically, the diameter of the tail outer wall groove is 4mm, and the circumferentially arranged groove is provided with an upper ring and a lower ring.
The upper end of the porous charging shell is in threaded connection with the outer wall of the lower part of the partition board detonation joint.
Compared with the prior art, the invention has the beneficial technical effects that:
The release buckle bullet adopts a partition board detonation technology, and is exposed to charge for releasing the buckle of the underground pipe column coupling.
According to the invention, the main explosive column in the shell is a temperature-resistant pressure-resistant explosive column, the temperature-resistant pressure-resistant explosive column is subjected to waterproof treatment, and passes a pressure-resistant test in a bare state, and the temperature-resistant pressure-resistant explosive column is matched with the high polymer material simulation explosive column, so that the adjustable explosive quantity is realized according to the actual explosive quantity requirement.
The porous charging shell is made of soluble high-performance metal materials, the structure is designed into a porous tubular sieve tube structure, the surface hardness of the porous charging shell is improved through a special treatment process, on one hand, the pressure bearing performance of the porous charging shell in the pit is improved, on the other hand, the porous charging shell is broken into small pieces after the porous charging shell is loosened, the small pieces are quickly dissolved, and the purpose of no falling objects in the pit is achieved.
The porous charging shell is of a porous pipe column sieve tube type structure, the structure can fully release explosive energy of charging and promote the loosening effect of a pipe column coupling, and the porous structure on the porous charging shell ensures that the porous charging shell can be broken into small fragments after the loosening.
In the invention, a perforating bullet is arranged in the partition board detonation joint to realize the detonation function of the main explosive column.
The outer wall of the cylindrical side wall of the partition board detonation joint is provided with a circumferential pre-cracking groove, the pre-cracking groove has the function of being capable of being broken in order from the pre-cracking groove after the main charge is detonated, and deformation of the partition board detonation joint is avoided, so that a tool string is blocked underground.
According to the invention, the outer wall of the tail of the bullet is provided with the grooves distributed along the circumferential direction, and the grooves have the effect that the tail of the bullet can be broken into small blocks after underground detonation, so that the underground water hole is not blocked.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention;
FIG. 2 is a schematic view of a porous charge housing of the present invention;
FIG. 3 is a schematic view of the connection of the connector and the bulkhead detonation connector of the present invention.
The reference numbers in the figure are 1-connecting joint, 2-partition board detonation joint, 2-1-bottom plate, 2-2-pre-cracking groove, 3-porous charging shell, 3-1-through hole, 4-bullet tail, 5-detonating cord, 6-sealing ring, 7-perforating bullet, 8-main charge column, 9-simulated charge column and 10-first stop screw.
Detailed Description
The invention provides a loose fastener for a downhole tubular column coupling, which is shown in figures 1 to 3, and comprises a connecting joint 1, a partition board detonating joint 2, a porous charging shell 3 and a tail 4 which are coaxially arranged in sequence from top to bottom; a coaxial detonating cord 5 is arranged in the central through hole of the connecting joint 1; the connecting joint 1 is in threaded connection with the partition board detonating joint 2, and a plurality of sealing rings 6 are arranged between the outer wall of the lower part of the connecting joint 1 and the inner wall of the upper part of the partition board detonating joint 2; the partition board detonation joint 2 comprises a cylindrical side wall and a bottom plate 2-1, a sealing cavity is formed between the bottom end of the connecting joint 1 and the bottom plate 2-1, a perforating bullet 7 is arranged in the sealing cavity, the top of the perforating bullet 7 is in contact with a detonating cord 5, a circumferential pre-splitting groove 2-2 is arranged on the outer wall of the cylindrical side wall, the pre-splitting groove 2-2 has the function of being capable of being broken neatly from the pre-splitting groove 2-2 after the main explosive is detonated, the deformation of the partition board detonation joint 2 is avoided, a tool string is caused in a downhole clamping manner, the pre-splitting groove 2-2 is positioned between the lower end face of the connecting joint 1 and a sealing ring 6 at the lowest part, a plurality of through holes 3-1 are formed in the side wall of a porous explosive shell 3, a main explosive column 8 and a simulated explosive column 9 are arranged in the porous explosive shell 3 from top to bottom, the explosive quantity of the main explosive column 8 can be regulated by regulating the height of the simulated explosive column 9, a first stop screw 10 is arranged on the side wall of the contact position between the upper end of the porous explosive shell 3 and the outer wall of the partition board detonation joint 2, the tail 4 is in a hollow structure, a small explosion block 4 is arranged on the outer wall of the tail 4 along the circumferential detonation groove, the underground water hole is not blocked, and the tail 4 is connected with the lower end of the porous charging shell 3 through screw threads and is provided with a second stop screw. The invention adopts a partition board detonation technology, naked charges, is used for loosening underground pipe column couplings, adopts a main charge column in a shell as a temperature-resistant pressure-resistant charge column, performs waterproof treatment on the temperature-resistant pressure-resistant charge column, passes a pressure-resistant test under the naked state, is matched with a polymer material simulated charge column, and realizes the adjustment of the dosage according to the actual dosage requirement.
The perforating bullet 7 comprises a perforating bullet shell, an initiating explosive located at the upper end of the perforating bullet shell, a main charge and a shaped charge liner located in the shell, wherein the initiating explosive is in contact with the lower end of the detonating cord 5, and the initiating function of the main charge column is achieved.
The thickness of the bottom plate 2-1 of the partition board detonation joint 2 is 3mm.
Among the plurality of through holes 3-1 on the porous charge shell 3, four top through holes are arranged at the uppermost end, the four top through holes are uniformly distributed along the circumference of the porous charge shell 3, a group of through holes 3-1 which are distributed at equal intervals along a 60-degree spiral are arranged below each top through hole, and the spiral directions of the groups of through holes 3-1 which are distributed spirally below the four top through holes are consistent. The porous charging shell 3 is made of a soluble high-performance metal material, is structurally designed into a porous tubular sieve tube structure, and improves the surface hardness of the porous charging shell 3 through a special treatment process, so that on one hand, the pressure bearing performance of the porous charging shell 3 in the pit is improved, on the other hand, the porous charging shell 3 is broken into small pieces after the loosening, and the small pieces are quickly dissolved, so that the purpose of no falling objects in the pit is achieved. The porous charging shell 3 is of a porous pipe column sieve pipe type structure, the structure can fully release explosive energy of charging and promote the loosening effect of pipe column couplings, and the porous structure on the porous charging shell 3 ensures that the porous charging shell 3 can be broken into small fragments after the loosening.
The diameter of the through hole 3-1 is 10mm, the distance from the top through hole to the first stop screw 10 on the top is 20mm, and the vertical distance between the through holes 3-1 is 10mm.
The diameter of the groove on the outer wall of the tail 4 is 4mm, and the circumferentially arranged groove is provided with an upper ring and a lower ring.
The working principle of the invention is as follows:
The detonating cord detonates the perforating bullet, explosive in the perforating bullet is crushed after being detonated, metal jet is generated, the metal jet penetrates through the partition board to detonate the main charging column in the shell, the main charging column acts on the column coupling, the coupling is vibrated and loosened, and therefore the purpose of loosening the column coupling is achieved.
The test process comprises the steps of firstly selecting a pipe column with a hooping ring as the underground pipe column to tightly buckle a coupling, secondly sealing the bottom of the pipe column, simulating the underground environment, filling water into the pipe column, placing the loosening bullet at the coupling position, and finally detonating the loosening bullet to observe whether the coupling position of the pipe column is perfect and whether the coupling can be normally disassembled.
The test effect is that the coupling is perfect, the coupling is not deformed and can be normally disassembled, and the test effect meets the requirement.
The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.
In addition, the specific features described in the above embodiments may be combined in any suitable manner without contradiction. The various possible combinations of the invention are not described in detail in order to avoid unnecessary repetition.
Moreover, any combination of the various embodiments of the invention can be made without departing from the spirit of the invention, which should also be considered as disclosed herein.
Claims (1)
1. The loose fastener bullet for the underground pipe column coupling is characterized by comprising a connecting joint (1), a baffle detonation joint (2), a porous charging shell (3) and a bullet tail (4) which are coaxially arranged in sequence from top to bottom;
The connecting joint (1) is connected with the partition board detonating joint (2), and a plurality of sealing rings (6) are arranged between the outer wall of the lower part of the connecting joint (1) and the inner wall of the upper part of the partition board detonating joint (2);
The partition board detonation connector (2) comprises a cylindrical side wall and a bottom plate (2-1), a sealing cavity is formed between the bottom end of the connecting connector (1) and the bottom plate (2-1), a perforating bullet (7) is arranged in the sealing cavity, the top of the perforating bullet (7) is contacted with the detonating cord (5), a circumferential pre-cracking groove (2-2) is arranged on the outer wall of the cylindrical side wall, the pre-cracking groove (2-2) has the effect that after the main charge is detonated, the pre-cracking groove (2-2) can be broken in order, the partition board detonation connector (2) is prevented from deforming, a tool string is caused to be blocked underground, and the pre-cracking groove (2-2) is positioned between the lower end face of the connecting connector (1) and a lowest sealing ring (6);
The side wall of the porous charging shell (3) is provided with a plurality of through holes (3-1), a main charging column (8) and a simulated column (9) are arranged in the porous charging shell (3) from top to bottom, and the medicine quantity of the main charging column (8) can be adjusted by adjusting the height of the simulated column (9);
The bullet tail (4) is of a conical hollow structure, the outer wall of the bullet tail (4) is provided with a groove distributed along the circumferential direction, and the groove has the function that the bullet tail (4) can be broken into small blocks after the explosion in the pit, so that the blockage of an underground water hole can not be caused;
The main explosive column in the shell is a temperature-resistant pressure-resistant explosive column, the temperature-resistant pressure-resistant explosive column is subjected to waterproof treatment, and the main explosive column passes through a pressure-resistant test under the exposure state and is matched with a polymer material simulated explosive column, so that the adjustment of the explosive quantity is realized according to the actual explosive quantity requirement;
The perforating bullet (7) comprises a perforating bullet shell, an initiating explosive positioned at the upper end of the perforating bullet shell, a main charge positioned in the shell and a liner;
The thickness of the bottom plate (2-1) of the partition board detonation joint (2) is 3mm;
Among the plurality of through holes (3-1) on the porous charge shell (3), four top through holes are arranged at the uppermost end, the four top through holes are uniformly distributed along the circumference of the porous charge shell (3), a group of through holes (3-1) which are distributed at equal intervals along a 60-degree spiral are arranged below each top through hole, and the spiral directions of the groups of through holes (3-1) which are distributed along the spiral are consistent below the four top through holes;
The porous charging shell (3) is made of a soluble high-performance metal material, and is structurally designed into a porous tubular sieve tube structure, the structure can fully release explosive energy of charging and promote the loosening effect of a tubular column coupling, and the porous structure on the porous charging shell (3) ensures that the porous charging shell (3) can be broken into small fragments after the loosening;
the diameter of the through hole (3-1) is 10mm, the distance from the top through hole to the first stop screw (10) at the upper part of the through hole is 20mm, and the vertical distance between the through holes (3-1) is 10mm;
The diameter of the groove on the outer wall of the tail (4) is 4mm, and the circumferentially arranged groove is provided with an upper circle and a lower circle;
the connecting joint (1) is in threaded connection with the partition board detonating joint (2);
the upper end of the porous charging shell (3) is in threaded connection with the outer wall of the lower part of the partition board detonation joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750734.7A CN111878002B (en) | 2020-07-30 | 2020-07-30 | A loosening spring for a downhole pipe coupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750734.7A CN111878002B (en) | 2020-07-30 | 2020-07-30 | A loosening spring for a downhole pipe coupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111878002A CN111878002A (en) | 2020-11-03 |
| CN111878002B true CN111878002B (en) | 2025-03-14 |
Family
ID=73205756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010750734.7A Active CN111878002B (en) | 2020-07-30 | 2020-07-30 | A loosening spring for a downhole pipe coupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111878002B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537255A (en) * | 1983-06-22 | 1985-08-27 | Jet Research Center, Inc. | Back-off tool |
| CN2228971Y (en) * | 1995-05-05 | 1996-06-12 | 高瑞 | Well repair bomb |
| CN202215175U (en) * | 2011-08-30 | 2012-05-09 | 中国石油集团西部钻探工程有限公司 | Explosive cutting short joint |
| CN104265224A (en) * | 2014-07-31 | 2015-01-07 | 西安石油大学 | Fast unclamping device realizing oil well drill clamping object directional explosion impact failure separation |
| CN212689949U (en) * | 2020-07-30 | 2021-03-12 | 北方斯伦贝谢油田技术（西安）有限公司 | A thread loosening bullet for tubular column coupling in pit |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2911909A (en) * | 1955-10-21 | 1959-11-10 | Emily B Wilcox | Droppable back-off tool |
| CN2308708Y (en) * | 1996-06-27 | 1999-02-24 | 高长友 | Sieving tube loaded fracturing pellet |
| US7195069B2 (en) * | 2003-06-26 | 2007-03-27 | Weatherford/Lamb, Inc. | Method and apparatus for backing off a tubular member from a wellbore |
| US20100000397A1 (en) * | 2006-04-17 | 2010-01-07 | Owen Oil Tools Lp | High Density Perforating Gun System Producing Reduced Debris |
| CN101726222B (en) * | 2009-11-19 | 2012-11-28 | 西安近代化学研究所 | Adjustable-charge high-pressure resistance device for breakouting pack of dynamite |
| US9695677B2 (en) * | 2011-09-02 | 2017-07-04 | Schlumberger Technology Corporation | Disappearing perforating gun system |
| WO2016007160A1 (en) * | 2014-07-10 | 2016-01-14 | Halliburton Energy Services, Inc. | High temperature, high pressure back-off shot tool |
| US11078763B2 (en) * | 2018-08-10 | 2021-08-03 | Gr Energy Services Management, Lp | Downhole perforating tool with integrated detonation assembly and method of using same |
-
2020
- 2020-07-30 CN CN202010750734.7A patent/CN111878002B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4537255A (en) * | 1983-06-22 | 1985-08-27 | Jet Research Center, Inc. | Back-off tool |
| CN2228971Y (en) * | 1995-05-05 | 1996-06-12 | 高瑞 | Well repair bomb |
| CN202215175U (en) * | 2011-08-30 | 2012-05-09 | 中国石油集团西部钻探工程有限公司 | Explosive cutting short joint |
| CN104265224A (en) * | 2014-07-31 | 2015-01-07 | 西安石油大学 | Fast unclamping device realizing oil well drill clamping object directional explosion impact failure separation |
| CN212689949U (en) * | 2020-07-30 | 2021-03-12 | 北方斯伦贝谢油田技术（西安）有限公司 | A thread loosening bullet for tubular column coupling in pit |
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| Publication number | Publication date |
|---|---|
| CN111878002A (en) | 2020-11-03 |
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