CN2453131Y - Oil well perforating gun decompression device - Google Patents
Oil well perforating gun decompression device Download PDFInfo
- Publication number
- CN2453131Y CN2453131Y CN 00250333 CN00250333U CN2453131Y CN 2453131 Y CN2453131 Y CN 2453131Y CN 00250333 CN00250333 CN 00250333 CN 00250333 U CN00250333 U CN 00250333U CN 2453131 Y CN2453131 Y CN 2453131Y
- Authority
- CN
- China
- Prior art keywords
- pressure
- oil well
- perforating gun
- pressure release
- piston
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- Expired - Fee Related
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Abstract
The utility model relates to an oil well perforating gun decompression device, which is characterized in that the utility model is connected with the lowest part of a perforating gun; the upper part of a casing has a decompression passage communicated with the perforating gun, and the lower part of the decompression passage is provided with a one-way decompression valve; the casing surface of the lower part of the casing has a plurality of decompression holes communicated with a cavity, and the one-way decompression valve is composed of a piston; as high pressure is generated in the perforating gun, the piston is pressed, and is driven to move downwards to fall into the lower part of the casing to disengage from the decompression passage. Thus, the pressure of the inside of the perforating gun is fully released through the decompression passage and from the decompression holes, and the generation of gun bursting accidents can be thoroughly and efficiently prevented.
Description
The utility model is a kind of oil well perforation rifle pressure relief device.
In petroleum industry, the oil well perforation operation is an important operation, be to be installed in high lined-cavity charge in the high-strength alloy seamless steel pipe of the withstand voltage 100Mpa of energy by every meter certain quantity, just in the perforating gun, perforating gun is connected in series by joint, do not connect mutually between each perforating gun, serial connection length can be connected in series tens meters according to core intersection and not wait to hundreds of rice, treat behind the target zone of down-hole, to ignite under it, high lined-cavity charge after the ignition forms a high temperature, the liquid metal jet of high pressure after perforating gun penetrated, is further penetrated sleeve pipe and the cement sheath of wearing the borehole wall, the stratum is communicated with oil well, reach formation fluid and can successfully flow into purpose in the oil well.But, in perforating job, because the influence of various factors, make high lined-cavity charge in blast, not have cumulative, promptly do not form the liquid metal jet flow of a HTHP, and detonation in a certain perforating gun, at this moment, can form a very high crunch in perforating gun, this pressure can not get effective release in moment, when the rifle internal pressure surpass perforating gun anti-in during the limiting pressure of pressure, will inevitably destroy perforating gun, form fried rifle, make the chap of rifle body profile or the rifle body is blown up, cause the rifle body to be stuck in the well or fall into the engineering accident of oil well.For this reason, the applicant is in the patent application of another oil well perforation rifle pressure release joint, in joint, be provided with through hole, be provided with one way valve on the joint, to connect mutually between each perforating gun, when pressure passes to the perforating gun two ends after the perforating bullet detonation, also just passed to simultaneously the joint at perforating gun two ends, when the one way valve on the joint is higher than in the well environment stress 1Kg in body of a gun internal pressure, one way valve is just opened and outside release pressure, all is unlocked until all one way valves, thereby reduces body of a gun pressure inside effectively, but, the pressure release that only depends on one way valve is not enough, because the summation of all one way valve discharge capacities is limited after all, far can not discharge gases at high pressure rapidly, it just plays the effect that perforating gun is slowed down destruction, does not thoroughly prevent the generation of fried rifle accident.
The purpose of this utility model is to provide a kind of oil well perforation rifle pressure relief device that prevents that more effectively fried rifle accident from taking place.
The utility model is achieved in that a kind of oil well perforation rifle pressure relief device, housing top is provided with the pressure release passage that connects with perforating gun, the bottom of pressure release passage is provided with unidirectional relief valve, lower housing portion is a cavity, and the surface of shell of lower housing portion has the relief hole that some and described cavity is connected.
Described unidirectional relief valve can be made of piston, and described piston seal is located at the bottom of pressure release passage.
The bottom of described piston can be provided with the aluminum pressure cap that is connected with the pressure release passage inner thread.
Described pressure relief device can be the branch body structure, and housing top is to be made of the pressure release joint that is connected with the perforating gun string bottommost, and described pressure release passage, piston are positioned at the pressure release joint.
Described pressure release joint also can be connected with the lower housing portion thread seal.
Described housing bottom also can be connected to plug.
The utility model is owing to be connected with pressure relief device at the perforating gun string bottommost, it seals under normal conditions, when high pressure occurring in the perforating gun, unidirectional relief valve is under pressure, and when pressure is enough big, unidirectional relief valve is moved down and breaks away from pressure release passage, and fall into housing bottom, high pressure is discharged from the relief hole of lower housing portion through pressure release passage, and the pressure in the perforating gun is discharged fully, has prevented the generation of fried rifle accident thoroughly, effectively.
Below in conjunction with embodiment the utility model is described in detail:
Fig. 1 is the structural representation of the utility model pressure relief device.
Oil well perforation rifle pressure relief device, housing top is provided with the pressure release passage 2 that connects with perforating gun 1, the bottom of pressure release passage 2 is provided with unidirectional relief valve, lower housing portion is a cavity 6, the surface of shell of lower housing portion has the relief hole 7 that some and described cavity 6 is connected, described pressure relief device can be the branch body structure, described unidirectional relief valve can be made of piston 3, the bottom of pressure release passage 2 is located in described piston 3 sealings, the bottom of described piston 3 is provided with the aluminum pressure cap 4 that is connected with pressure release passage 2 inner threads, when high pressure occurring in the perforating gun 1, piston 3 is under pressure, when the pressure on acting on piston 3 is enough big, the screw thread of aluminum pressure cap 4 is sheared, piston 3 is moved down and fall into lower housing portion and break away from pressure release passage 2, realize discharging the whole pressure in the perforating gun, housing top is to be made of the pressure release joint 5 that is connected with the perforating gun string bottommost, described pressure release passage 2, piston 3, aluminum pressure cap 4 is positioned at pressure release joint 5, lower housing portion is made of screen casing with holes 8, described pressure release joint 5 is connected with screen casing 8 thread seals, screen casing 8 bottoms are connected to plug 9, and relief hole 7 is opened on screen casing 8.
Claims (8)
1. oil well perforation rifle pressure relief device, it is characterized in that: housing top is provided with the pressure release passage that connects with perforating gun, the bottom of pressure release passage is provided with unidirectional relief valve, and lower housing portion is a cavity, and the surface of shell of lower housing portion has the relief hole that some and described cavity is connected.
2. oil well perforation rifle pressure relief device as claimed in claim 1 is characterized in that: described unidirectional relief valve is made of piston, and described piston seal is located at the bottom of pressure release passage.
3. oil well perforation rifle pressure relief device as claimed in claim 2 is characterized in that: the bottom of described piston is provided with the aluminum pressure cap that is connected with the pressure release passage inner thread.
4. as claim 1,2 or 3 described oil well perforation rifle pressure relief devices, it is characterized in that: described pressure relief device is for dividing body structure, housing top is to be made of the pressure release joint that is connected with the perforating gun string bottommost, and described pressure release passage, piston are positioned at the pressure release joint.
5. oil well perforation rifle pressure relief device as claimed in claim 4 is characterized in that: described pressure release joint is connected with the lower housing portion thread seal.
6. as claim 1,2 or 3 described oil well perforation rifle pressure relief devices, it is characterized in that: described housing bottom is connected to plug.
7. oil well perforation rifle pressure relief device as claimed in claim 6, it is characterized in that: lower housing portion is made of screen casing.
8. oil well perforation rifle pressure relief device as claimed in claim 7, it is characterized in that: described relief hole is opened on screen casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00250333 CN2453131Y (en) | 2000-09-05 | 2000-09-05 | Oil well perforating gun decompression device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00250333 CN2453131Y (en) | 2000-09-05 | 2000-09-05 | Oil well perforating gun decompression device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2453131Y true CN2453131Y (en) | 2001-10-10 |
Family
ID=33608544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00250333 Expired - Fee Related CN2453131Y (en) | 2000-09-05 | 2000-09-05 | Oil well perforating gun decompression device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2453131Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297727C (en) * | 2004-10-29 | 2007-01-31 | 西安通源石油科技股份有限公司 | Oil-gas well perforator interlayer gun |
| CN100414071C (en) * | 2005-03-22 | 2008-08-27 | 大庆石油管理局射孔弹厂 | Construction method for compound blind holes of perforating gun |
| CN101864933B (en) * | 2004-04-23 | 2012-04-18 | 施卢默格控股有限公司 | Method for reducing pressure in a perforating gun |
| CN101575965B (en) * | 2009-04-02 | 2012-09-19 | 西安近代化学研究所 | Perforating explosion-proof gun device |
| CN113550723A (en) * | 2020-04-23 | 2021-10-26 | 中国石油天然气股份有限公司 | Pressure relief device and perforating gun |
-
2000
- 2000-09-05 CN CN 00250333 patent/CN2453131Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101864933B (en) * | 2004-04-23 | 2012-04-18 | 施卢默格控股有限公司 | Method for reducing pressure in a perforating gun |
| CN1297727C (en) * | 2004-10-29 | 2007-01-31 | 西安通源石油科技股份有限公司 | Oil-gas well perforator interlayer gun |
| CN100414071C (en) * | 2005-03-22 | 2008-08-27 | 大庆石油管理局射孔弹厂 | Construction method for compound blind holes of perforating gun |
| CN101575965B (en) * | 2009-04-02 | 2012-09-19 | 西安近代化学研究所 | Perforating explosion-proof gun device |
| CN113550723A (en) * | 2020-04-23 | 2021-10-26 | 中国石油天然气股份有限公司 | Pressure relief device and perforating gun |
| CN113550723B (en) * | 2020-04-23 | 2023-12-22 | 中国石油天然气股份有限公司 | Pressure relief device and perforating gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |