CN111878002A - A thread loosening bullet for tubular column coupling in pit - Google Patents
A thread loosening bullet for tubular column coupling in pit Download PDFInfo
- Publication number
- CN111878002A CN111878002A CN202010750734.7A CN202010750734A CN111878002A CN 111878002 A CN111878002 A CN 111878002A CN 202010750734 A CN202010750734 A CN 202010750734A CN 111878002 A CN111878002 A CN 111878002A
- Authority
- CN
- China
- Prior art keywords
- bullet
- porous
- joint
- wall
- detonating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000008878 coupling Effects 0.000 title claims abstract description 30
- 238000010168 coupling process Methods 0.000 title claims abstract description 30
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 30
- 238000005474 detonation Methods 0.000 claims abstract description 19
- 238000004088 simulation Methods 0.000 claims abstract description 10
- 239000000843 powder Substances 0.000 claims abstract description 7
- 239000002360 explosive Substances 0.000 claims description 31
- 238000007789 sealing Methods 0.000 claims description 9
- 230000000977 initiatory effect Effects 0.000 claims description 6
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 4
- 239000011257 shell material Substances 0.000 description 33
- 238000005192 partition Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 7
- 238000010276 construction Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000012634 fragment Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002861 polymer material Substances 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
- 238000009826 distribution Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 the boreholes or wells
- E21B23/04—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells operated by fluid means, e.g. actuated by explosion
Abstract
The invention discloses a release bullet for a down-hole pipe column coupling, which comprises a connecting joint, a clapboard detonating joint, a porous charging shell and a bullet tail which are coaxially arranged from top to bottom in sequence; a coaxial detonating cord is arranged in the central through hole of the connecting joint; the clapboard detonation joint comprises a cylindrical side wall and a bottom plate, a sealed cavity is formed between the bottom end of the connecting joint and the bottom plate, a perforating bullet is arranged in the sealed cavity, and the top of the perforating bullet is in contact with the detonating cord; a circumferential presplitting groove is formed in the outer wall of the cylindrical side wall; the side wall of the porous charging shell is provided with a plurality of through holes, a main charging column and a simulation charging column are arranged in the porous charging shell from top to bottom, and the dosage of the main charging column can be adjusted by adjusting the height of the simulation charging column; the bullet tail is toper hollow structure, is equipped with the recess of laying along circumference at the bullet tail outer wall. The invention relates to a loose-buckling bomb which adopts a clapboard detonation technology and is filled with powder in an exposed mode and used for loosening a coupling of a downhole tubular column.
Description
Technical Field
The invention belongs to the field of handling accidents of underground pipe columns in case of clamping, and particularly relates to a release button bullet for underground pipe column couplings.
Background
In construction operation in other fields such as oil gas well, the tubular column frequently takes place to meet the card accident in the pit. The common processing means for solving the clamping accident comprises tubular column loosening and tubular column cutting, the tubular column cutting cannot realize the recovery of the whole tubular column and has a destructive effect on the tubular column, and the tubular column coupling loosening cannot damage the tubular column, so that the repeated use function of the tubular column can be realized.
The structure that current thread loosening bullet adopted is detonating cord wound form structure, and the pressure-bearing sealing performance is poor, and construction operation is complicated and need the customization to different wells, has increased construction cycle and the construction degree of difficulty.
Disclosure of Invention
Aiming at the defects and shortcomings in the prior art, the invention provides a tripping bullet for a down-hole pipe column coupling, which adopts a partition plate detonation technology, exposed charging, a shell designed as a sieve pipe and a dosage-adjustable tripping bullet to achieve the purpose of tripping the down-hole pipe column.
In order to achieve the purpose, the invention adopts the following technical scheme:
a trip bullet for a downhole tubular column coupling comprises a connecting joint, a clapboard detonating joint, a porous charging shell and a bullet tail which are coaxially arranged from top to bottom in sequence;
a coaxial detonating cord is arranged in the central through hole of the connecting joint; the connecting joint is connected with the clapboard detonating 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 clapboard detonating joint;
the clapboard detonation joint comprises a cylindrical side wall and a bottom plate, a sealed cavity is formed between the bottom end of the connecting joint and the bottom plate, a perforating bullet is arranged in the sealed cavity, and the top of the perforating bullet is in contact with the detonating cord; a circumferential presplitting groove is formed in the outer wall of the cylindrical side wall and is positioned between the lower end face of the connecting joint and the lowermost sealing ring;
the side wall of the porous charging shell is provided with a plurality of through holes, a main charging column and a simulation charging column are arranged in the porous charging shell from top to bottom, and the dosage of the main charging column can be adjusted by adjusting the height of the simulation charging column; the upper end of the porous explosive charging shell is connected with the outer wall of the lower part of the partition board detonating joint, and the side wall of the contact position of the porous explosive charging shell and the partition board detonating joint is provided with a backstop screw;
the bullet tail is the toper hollow structure, is equipped with the recess of laying along circumference at the bullet tail outer wall, and bullet tail and porous powder charge casing lower extreme threaded connection are equipped with the stopping screw.
The invention also comprises the following technical characteristics:
specifically, the perforating bullet comprises a perforating bullet shell, an initiating explosive positioned at the upper end of the perforating bullet shell, a main explosive positioned in the shell and a shaped charge liner; the primary explosive is in contact with the lower end of the detonating cord.
Specifically, the thickness of the bottom plate of the clapboard detonation joint is 3 mm.
Specifically, among a plurality of through-holes on the porous powder charge casing, be located the uppermost four top through-holes, four top through-holes along porous powder charge casing circumference equipartition, every top through-hole below be a set of through-hole along 60 spiral equidistant distributions, and the spiral direction of each group of spiral through-hole of arranging of four top through-holes below is unanimous.
Specifically, the diameter of the through hole is 10 mm; the distance between the top through hole and the upper backstop screw is 20 mm; the vertical spacing of the through holes is 10 mm.
Specifically, the diameter of bullet tail outer wall recess is 4mm, and this circumference groove of arranging has two rings from top to bottom.
Specifically, the connecting joint is in threaded connection with the clapboard detonating joint; the upper end of the porous charging shell is in threaded connection with the outer wall of the lower part of the clapboard detonating joint.
Compared with the prior art, the invention has the beneficial technical effects that:
the invention relates to a loose-buckling bomb which adopts a clapboard detonation technology and is filled with powder in an exposed mode and used for loosening a coupling of a downhole tubular column.
According to the invention, the main explosive loading column in the shell is a temperature-resistant pressure-resistant explosive column which is subjected to waterproof treatment and passes a pressure-resistant test in a naked state, and the main explosive loading column is matched with a high polymer material simulation explosive column, so that the dosage can be adjusted according to the actual dosage requirement.
The porous charging shell material is a soluble high-performance metal material, the structure is designed to be a porous tubular sieve tube type structure, the surface hardness of the porous charging shell is improved through a special treatment process, on one hand, the underground pressure bearing performance of the porous charging shell is improved, on the other hand, the porous charging shell is broken into small pieces after being loosened and dissolved quickly, and the purpose of no falling object underground is achieved.
The porous charge shell is a porous tubular column sieve tube type structure which can fully release the explosive energy of charge and improve the effect of loosening a tubular column coupling; the porous structure on the porous charge case ensures that after the release the porous charge case itself can break into small fragments.
In the invention, a perforating bullet is arranged in the partition plate detonation joint to realize the detonation function of the main explosive charge.
The outer wall of the cylindrical side wall of the partition plate detonation joint is provided with a circumferential pre-splitting groove, and the pre-splitting groove is used for regularly breaking from the pre-splitting groove after main explosive is detonated, so that deformation of the partition plate detonation joint is avoided, and a tool string is prevented from being stuck underground.
In the invention, the outer wall of the bullet tail is provided with the grooves distributed along the circumferential direction, and the grooves have the function that the bullet tail can be broken into small blocks after underground detonation, so that underground water holes cannot be blocked.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of the porous charge case structure of the present invention;
FIG. 3 is a schematic view of the connection of the connector sub and the spacer detonation sub of the present invention.
The reference numbers in the figure are 1-connecting joint, 2-clapboard detonating joint, 2-1-bottom plate, 2-2-pre-splitting groove, 3-porous charging shell, 3-1-through hole, 4-bullet tail, 5-detonating cord, 6-sealing ring, 7-perforating bullet, 8-main charging column, 9-simulating charge column and 10-first backstop screw.
Detailed Description
The invention provides a tripping bullet for a down-hole pipe column coupling, which comprises a connecting joint 1, a clapboard detonating joint 2, a porous charging shell 3 and a bullet tail 4 which are coaxially arranged from top to bottom as shown in figures 1 to 3; a coaxial detonating cord 5 is arranged in a 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 clapboard detonation joint 2 comprises a cylindrical side wall and a bottom plate 2-1, a sealed 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 sealed cavity, and the top of the perforating bullet 7 is contacted with the detonating cord 5; the outer wall of the cylindrical side wall is provided with a circumferential pre-splitting groove 2-2, the pre-splitting groove 2-2 has the effect that after the main explosive is detonated, the main explosive can be regularly broken from the pre-splitting groove 2-2, so that the deformation of the partition board detonating joint 2 is avoided, and a tool string is prevented from being clamped underground, wherein the pre-splitting groove 2-2 is positioned between the lower end face of the connecting joint 1 and the lowermost 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 simulation charging column 9 are arranged in the porous charging shell 3 from top to bottom, and the dosage of the main charging column 8 can be adjusted by adjusting the height of the simulation charging column 9; the upper end of the porous explosive charging shell 3 is in threaded connection with the outer wall of the lower part of the partition board detonating joint 2, and a first backstop screw 10 is arranged on the side wall of the contact position of the porous explosive charging shell and the partition board detonating joint; the bullet tail 4 is of a conical hollow structure, the outer wall of the bullet tail 4 is provided with grooves distributed along the circumferential direction, and the grooves have the effect that the bullet tail 4 can be broken into small blocks after underground detonation, so that underground water holes cannot be blocked; the bullet tail 4 is in threaded connection with the lower end of the porous charging shell 3 and is provided with a second backstop screw. The invention adopts the clapboard detonation technology, and the exposed powder charge is used for loosening a coupling of a down-hole pipe column; the main explosive loading column in the shell is a temperature-resistant and pressure-resistant explosive loading column which is subjected to waterproof treatment and passes a pressure-resistant test in a naked state, and the main explosive loading column is matched with a high polymer material simulation explosive loading column to realize the adjustment of the explosive amount according to the actual explosive loading 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 shaped charge cover; the initiating explosive is contacted with the lower end of the detonating cord 5; the detonation function of the main explosive loading column is realized.
The thickness of the bottom plate 2-1 of the clapboard detonation joint 2 is 3 mm.
Among the plurality of through holes 3-1 on the porous charging 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 charging shell 3, a group of through holes 3-1 which are distributed at equal intervals along a 60-degree spiral is arranged below each top through hole, and the spiral directions of the groups of through holes 3-1 which are spirally arranged 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 type structure, and is improved in surface hardness through a special treatment process, so that the underground pressure bearing performance of the porous charging shell 3 is improved, and the porous charging shell 3 is broken into small pieces after being loosened and quickly dissolved away, so that the underground falling-free purpose is realized. The porous charge shell 3 is a porous tubular column sieve tube type structure which can fully release the explosive energy of charge and improve the effect of loosening a tubular column coupling; the porous structure on the porous charge case 3 ensures that after the release the porous charge case 3 itself can break into small fragments.
The diameter of the through hole 3-1 is 10 mm; the distance between the top through hole and the first backstop screw 10 on the upper part of the top through hole is 20 mm; the vertical distance of the through holes 3-1 is 10 mm.
The diameter of 4 outer wall recesses of bullet tail is 4mm, and the recess of this circumference arrangement has two rings from top to bottom.
The working principle of the invention is as follows:
the detonating cord detonates the perforating bullet, and the explosive in the perforating bullet is detonated and then collapses the shaped charge cover to produce the metal efflux, and the metal efflux pierces through the main charge post in the baffle detonation casing, and the main charge post acts on the tubular column coupling to shake the coupling loose, thereby realizing the purpose of loosening the tubular column coupling.
The test process comprises the following steps: firstly, selecting a pipe column with a coupling which is the same as that in the underground, and fastening the coupling; secondly, sealing the bottom of the pipe column, simulating the underground environment, filling water into the pipe column, placing the thread-releasing bullet of the invention at the position of the coupling, finally detonating the thread-releasing bullet, and observing whether the position of the coupling of the pipe column is intact and whether the coupling can be normally disassembled.
The test effect is as follows: the coupling is intact, and no deformation and coupling can normally be dismantled, and experimental effect reaches the requirement.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, 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 technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.
Claims (7)
1. A trip bullet for a downhole tubular column coupling is characterized by comprising a connecting joint (1), a clapboard detonating joint (2), a porous charging shell (3) and a bullet tail (4) which are coaxially arranged from top to bottom in sequence;
a coaxial detonating cord (5) is arranged in a central through hole of the connecting joint (1); the connecting joint (1) is connected with the clapboard 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 clapboard detonating joint (2);
the baffle plate detonation joint (2) comprises a cylindrical side wall and a bottom plate (2-1), a sealed 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 sealed cavity, and the top of the perforating bullet (7) is in contact with the detonating cord (5); a circumferential pre-splitting groove (2-2) is formed in the outer wall of the cylindrical side wall, and the pre-splitting groove (2-2) is located between the lower end face of the connecting joint (1) and the lowermost 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 simulation charging column (9) are arranged in the porous charging shell (3) from top to bottom, and the dosage of the main charging column (8) can be adjusted by adjusting the height of the simulation charging column (9); the upper end of the porous explosive charging shell (3) is connected with the outer wall of the lower part of the clapboard detonating joint (2), and a first backstop screw (10) is arranged on the side wall of the contact position of the porous explosive charging shell and the clapboard detonating joint;
the bullet tail (4) is of a conical hollow structure, a groove arranged along the circumferential direction is formed in the outer wall of the bullet tail (4), and the bullet tail (4) is in threaded connection with the lower end of the porous powder charging shell (3) and is provided with a second backstop screw.
2. The trip ammunition for a tubular string coupling as recited in claim 1, wherein the perforating ammunition (7) comprises a perforating ammunition casing, an initiating explosive at the upper end of the perforating ammunition casing, a main charge and a liner inside the casing; the primary explosive is in contact with the lower end of the detonating cord (5).
3. The trip ammunition for a tubular string coupling as claimed in claim 1, wherein the base plate (2-1) of the spacer initiation sub (2) has a thickness of 3 mm.
4. The thread-releasing bullet for a downhole string coupling according to claim 1, wherein four top through holes are located at the uppermost end of the plurality of through holes (3-1) in the porous charge casing (3), the four top through holes are uniformly distributed along the circumference of the porous charge casing (3), a group of through holes (3-1) are arranged below each top through hole at equal intervals along a 60-degree spiral, and the spiral directions of the groups of through holes (3-1) arranged in a spiral manner below the four top through holes are consistent.
5. The thread-off bullet for a tubular string coupling as claimed in claim 4, wherein the diameter of the through-hole (3-1) is 10 mm; the distance between the top through hole and the first backstop screw (10) on the upper part of the top through hole is 20 mm; the vertical distance between the through holes (3-1) is 10 mm.
6. The thread-off bullet for a tubular string coupling as claimed in claim 1, wherein the diameter of the groove on the outer wall of the bullet tail (4) is 4mm, and the circumferentially arranged groove has two upper and lower circles.
7. The trip bullet for a tubular string coupling as claimed in claim 1, wherein the connection sub (1) and the bulkhead initiation sub (2) are in threaded connection;
the upper end of the porous charging shell (3) is in threaded connection with the outer wall of the lower part of the clapboard detonating joint (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750734.7A CN111878002A (en) | 2020-07-30 | 2020-07-30 | A thread loosening bullet for tubular column coupling in pit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010750734.7A CN111878002A (en) | 2020-07-30 | 2020-07-30 | A thread loosening bullet for tubular column coupling in pit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111878002A true CN111878002A (en) | 2020-11-03 |
Family
ID=73205756
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010750734.7A Pending CN111878002A (en) | 2020-07-30 | 2020-07-30 | A thread loosening bullet for tubular column coupling in pit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111878002A (en) |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2911909A (en) * | 1955-10-21 | 1959-11-10 | Emily B Wilcox | Droppable back-off tool |
| 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 |
| CN2308708Y (en) * | 1996-06-27 | 1999-02-24 | 高长友 | Sieving tube loaded fracturing pellet |
| US20040262004A1 (en) * | 2003-06-26 | 2004-12-30 | John Roberts | 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 |
| CN101726222A (en) * | 2009-11-19 | 2010-06-09 | 西安近代化学研究所 | Adjustable-charge high-pressure resistance device for breakouting pack of dynamite |
| 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 pup joint |
| US20130118805A1 (en) * | 2011-09-02 | 2013-05-16 | Alexander Moody-Stuart | Disappearing perforating gun system |
| 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 |
| WO2016007160A1 (en) * | 2014-07-10 | 2016-01-14 | Halliburton Energy Services, Inc. | High temperature, high pressure back-off shot tool |
| US20200072029A1 (en) * | 2018-08-10 | 2020-03-05 | Gr Energy Services Management, Lp | Downhole perforating tool with integrated detonation assembly and method of using same |
| 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 |
-
2020
- 2020-07-30 CN CN202010750734.7A patent/CN111878002A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2911909A (en) * | 1955-10-21 | 1959-11-10 | Emily B Wilcox | Droppable back-off tool |
| 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 |
| CN2308708Y (en) * | 1996-06-27 | 1999-02-24 | 高长友 | Sieving tube loaded fracturing pellet |
| US20040262004A1 (en) * | 2003-06-26 | 2004-12-30 | John Roberts | 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 |
| CN101726222A (en) * | 2009-11-19 | 2010-06-09 | 西安近代化学研究所 | Adjustable-charge high-pressure resistance device for breakouting pack of dynamite |
| 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 pup joint |
| US20130118805A1 (en) * | 2011-09-02 | 2013-05-16 | Alexander Moody-Stuart | Disappearing perforating gun system |
| WO2016007160A1 (en) * | 2014-07-10 | 2016-01-14 | Halliburton Energy Services, Inc. | High temperature, high pressure back-off shot tool |
| 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 |
| US20200072029A1 (en) * | 2018-08-10 | 2020-03-05 | Gr Energy Services Management, Lp | Downhole perforating tool with integrated detonation assembly and method of using same |
| 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 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203642815U (en) | Waste ammunition energy-gathered detonation destroying device | |
| CN113898330B (en) | Methane in-situ perforation, blasting and fracturing integrated device and method for open hole section of horizontal well | |
| US7819180B2 (en) | High-energy gas fracture apparatus for through-tubing operations | |
| CN101419040A (en) | Deep hole blasting method in large aperture composite undermine | |
| CN209559045U (en) | One kind medicine type cover perforating bullet performance testing device containing energy | |
| CN112179225A (en) | One-time well-completion blasting method | |
| CN212689949U (en) | A thread loosening bullet for tubular column coupling in pit | |
| CN105507838A (en) | Cumulative cutting device for thick-wall metal pipe columns | |
| CN112432570B (en) | Controlled blasting construction method for vertical shaft wall beam nest | |
| CN111878002A (en) | A thread loosening bullet for tubular column coupling in pit | |
| CA2690037C (en) | A device, charging unit and method of filling a borehole with an explosive material | |
| CN108592726A (en) | A kind of presplit blasting Parameters design for excavation of foundation pit | |
| CN210570276U (en) | Detonation explosion-proof tube for sectionally and alternately charging closed space | |
| CN109723422B (en) | High-energy gas fracturing production-increasing and injection-increasing device for oil well | |
| CN210570270U (en) | Bonnet fryer with rubble is thrown function | |
| CN211524783U (en) | Pressure relief safety gun tail for cable transmission perforating gun | |
| CN113883979A (en) | Downhole upward hole bottom detonating tool and using method thereof | |
| CN210003261U (en) | perforating bullet for oil-gas well | |
| CN102305058B (en) | Novel synergistic shattering perforation series charging device | |
| CN103015936B (en) | A kind of withered and fallen thing Pressure breaking bullet device | |
| CN201254978Y (en) | Perforating gun String terminal signal generator | |
| CN212985149U (en) | Small-diameter drill rod cutting bullet for detonating at two ends of ultra-deep and ultra-high temperature well | |
| RU2106472C1 (en) | Firing-blasting device | |
| CN201254977Y (en) | Integral synergistic perforating gun | |
| CN211291199U (en) | Blasting device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |