CN103696734B - Differential-pressurtype type pressure release valve of marine deep well pipe column - Google Patents
Differential-pressurtype type pressure release valve of marine deep well pipe column Download PDFInfo
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- CN103696734B CN103696734B CN201310707874.6A CN201310707874A CN103696734B CN 103696734 B CN103696734 B CN 103696734B CN 201310707874 A CN201310707874 A CN 201310707874A CN 103696734 B CN103696734 B CN 103696734B
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Abstract
The present invention relates to a kind of Differential-pressurtype type pressure release valve of marine deep well pipe column.Differential-pressurtype type pressure release valve of marine deep well pipe column includes: top connection, sleeve, central tube, one-way seals, spacing ring, spring, lower contact；Central tube is threadeded with top connection, lower contact and seals；Sleeve is threadeded with top connection；Spacing ring is fixed by a pin to the middle part of central tube, and one-way seals is contained on central tube, and spring housing is located on central tube, between one-way seals and lower contact；The top of described central tube is provided with the first valve port, middle part is provided with the second valve port；First valve port position between top connection, spacing ring, connection tubing string inside and described annular space；Second valve port is positioned at the bottom of spacing ring.Present configuration is simple, easy to maintenance；The connection inside and outside tubing string or the pressure required for closedown can be controlled by changing the elastic force of spring；Pressure release can be continued, it is not necessary to worry to cause the problem of hypertonia in tubing string due to upper lifting pipe post during upper lifting pipe post.
Description
Technical field
The invention belongs to oil exploration and development fields, in particular it relates to a kind of Differential-pressurtype type pressure release valve of marine deep well pipe column；For reducing the high pressure produced inside tubing string during upper lifting pipe post in time, prevent packer the most setting.
Background technology
At present, when separating tubing string or setting tubing string with packer on ocean, the lower termination plug of combined string or ball-and-seat, owing to the lower space of tubing string inner space especially tubing string is the most airtight, during upper lifting pipe post, liquid flow within tubing string can not be got rid of in time, the longest one section of fluid column higher than horizontal plane can be overstock inside tubing string, in making tubing string, pressure gradually rises, it is easily caused packer the most setting, causing more serious down-hole accident, also fill seawater inside the tubing string being brought up, dismounting tubing string bothers very much.
Summary of the invention
For overcoming defect present in prior art, the present invention provides a kind of Differential-pressurtype type pressure release valve of marine deep well pipe column, Differential-pressurtype type pressure release valve of marine deep well pipe column can be in opening during upper lifting pipe post, makes the inside and outside connection of tubing string, is discharged by the liquid in tubing string in time, prevent tubing string internal generation higher differential pressure, and when wanting base sealed packer, suppress the closing presure to relief valve, relief valve can be closed, be equivalent to an airtight oil pipe, do not affect the setting of packer.
For achieving the above object, the present invention uses following proposal:
A kind of Differential-pressurtype type pressure release valve of marine deep well pipe column, including: top connection, sleeve, central tube, one-way seals, spacing ring, spring, lower contact；It is characterized in that:
The lower end of top connection is provided with internal thread and external screw thread；
The upper end of lower contact is provided with internal thread；
The upper end of central tube, lower end are equipped with external screw thread；
The upper end of sleeve is provided with internal thread；
Central tube is connected with top connection by the external screw thread of upper end and is sealed；
Central tube is connected with lower contact by the external screw thread of lower end and is sealed；
Sleeve is threadeded with top connection by the internal thread of upper end；
Spacing ring is fixed by a pin to the middle part of central tube, limits the position of one-way seals, prevents one-way seals up；
One-way seals is contained on central tube, can move axially along central tube；
Spring housing is located on central tube, between one-way seals and lower contact；
The top of described central tube is provided with the first valve port, middle part is provided with the second valve port；First valve port position between top connection, spacing ring, connection tubing string inside and described annular space；Second valve port is positioned at the bottom of spacing ring, and one-way seals moves when contacting to top with spacing ring, and the second valve port is not sealed by one-way seals, can be by the second sealing valve port when one-way seals moves down；
The bottom of described sleeve is provided with the 3rd valve port, and described valve port can switch the connection with described valve port or closedown with the movement of one-way seals.
Relative to prior art, the beneficial effects of the present invention is:
(1), simple in construction, easy to maintenance；
(2), the connection inside and outside tubing string or the pressure required for closedown can be controlled by changing the elastic force of spring；
(3), pressure release can be continued during upper lifting pipe post, it is not necessary to worry to cause due to upper lifting pipe post the problem of hypertonia in tubing string again.Therefore, the present invention can accelerate speed of application, and ensure that work progress is more safe and reliable, it is possible to as the useful supplement of associated construction program.
Accompanying drawing explanation
Fig. 1 is the structural representation of the Differential-pressurtype type pressure release valve of marine deep well pipe column of the present invention；
In figure: 1, top connection, 2, sleeve, 3, central tube, 4, one-way seals, 5, spacing ring, 6, spring, 7, lower contact, 8, anti-rotation pin, 9, sealing ring.
Detailed description of the invention
As it is shown in figure 1, Differential-pressurtype type pressure release valve of marine deep well pipe column, including: top connection 1, sleeve 2, central tube 3, one-way seals 4, spacing ring 5, spring 6, lower contact 7, anti-rotation pin 8, sealing ring 9.
The lower end of top connection 1 is provided with internal thread and external screw thread；
The upper end of lower contact is provided with internal thread；
The upper end of central tube 3, lower end are equipped with external screw thread；
The upper end of sleeve 2 is provided with internal thread；
Central tube 3 is connected with top connection by the external screw thread of upper end and is sealed, and forms fixed component；
Central tube 3 is connected with lower contact by the external screw thread of lower end and is sealed, and forms fixed component；
Sleeve 2 is threadeded with top connection 1 by the internal thread of upper end；Sealing ring 8 and anti-rotation pin 9 it is provided with, it is ensured that the two fastness connected and sealing property between top connection 1 and sleeve 2.
Spacing ring 5 is fixed by a pin to the middle part of central tube 3, limits the position of one-way seals 4, prevents one-way seals 4 up；
One-way seals 4 is contained on central tube 3, is axially movable, it is ensured that by top connection 1, sleeve 2, central tube 3, the good seal performance of the constituted annular space of one-way seals 4.
Spring 6 is set on central tube 3, between one-way seals 4 and lower contact 7；The elastic force of described spring 6 calculates setting according to given standard of suppressing so that it is can adapt to different suppress operation.
The top of described central tube 3 is provided with the first valve port 301, middle part is provided with the second valve port 302；First valve port 301 position between top connection 1, spacing ring 5, connection tubing string inside and described annular space, in making annular space, pressure changes with the change of tubing string internal pressure；Second valve port 302 is positioned at the bottom of spacing ring 5, and one-way seals 4 moves when contacting to top with spacing ring 5, and the second valve port 302 is not sealed by one-way seals 4, can be sealed by the second valve port 302 when one-way seals moves down.
The bottom of described sleeve 2 is provided with the 3rd valve port 201, and described valve port 302 can switch the connection with described valve port 201 or closedown with the movement of one-way seals 4.
Described valve port 302 is with the mobile handoff of described one-way seals 4 and the connection of described valve port 201 or closedown, it is thus possible to realize the connection inside and outside tubing string or closedown.Owing to the open and close of valve port 302 are that the active force produced one-way seals 4 by tubing string internal liquid is determined with the difference between the elastic force of spring 6, the force value being turned on and off of valve port 302 can be controlled by changing the elastic force of spring 6.
Liquid flow in tubing string has two kinds of flow directions: a kind of is that liquid flow is passed through the first valve port 301 and flowed into the confined space being made up of top connection 1, sleeve 2, central tube 3, one-way seals 4；One is that liquid flow passes through the second valve port 302, flows to o exterior via valve port 201.When tubing string internal pressure is less, spring can support one-way seals 4 so that it is cannot continue traveling downwardly guarantee instrument and can play the function of its pressure release well；When tubing string internal pressure increases, active force that one-way seals 4 is produced by duct fluid flow increases so that one-way seals 4 continues to overcome the elastic force of spring 6 and descending, is closed by valve port 302, and liquid flow no longer flows out from valve port 201, and relief valve becomes sealing state.
When suppressing tubing string small displacement, liquid flow can flow to o exterior by described valve port 302 via described valve port 201, is similar to slow upper lifting pipe post, can pressure release in time inside tubing string；When suppressing tubing string huge discharge, liquid flow flows into described airtight annular space by described valve port 301, promotes one-way seals to overcome the elastic force of spring descending, described valve port 302 is closed, liquid flow is no longer flow towards o exterior, in sealing state inside tubing string, in order to carry out follow-up working procedure.
The Differential-pressurtype type pressure release valve of marine deep well pipe column of the present invention is connected to the lower end of operating tool string, such as, in the working procedure that sleeve pipe is looked for leakage, relief valve is connected to below packer, when set packer suppressed by needs when, tubing string is suppressed by larger displacement, relief valve can be closed, such as one sleeve pipe of shape, does not affect the running of other instruments, when carrying operating tool string on when, in tubing string, pressure is less, and relief valve is in opening so that tubing string is internal only has less pressure, prevent packer setting, cause that down-hole accident occurs.
Claims (2)
1. a Differential-pressurtype type pressure release valve of marine deep well pipe column, including: top connection, sleeve, central tube, one-way seals, spacing ring, spring, lower contact；It is characterized in that: the lower end of top connection is provided with internal thread and external screw thread；The upper end of lower contact is provided with internal thread；The upper end of central tube, lower end are equipped with external screw thread；The upper end of sleeve is provided with internal thread；Central tube is connected with top connection by the external screw thread of upper end and is sealed, and forms fixed component；Central tube is connected with lower contact by the external screw thread of lower end and is sealed, and forms fixed component；Sleeve is threadeded with top connection by the internal thread of upper end, is provided with sealing ring between top connection and sleeve, it is ensured that the sealing property that top connection, both sleeves connect；Top connection, sleeve, central tube, one-way seals constitute annular space；Spacing ring is fixed by a pin to the middle part of central tube, limits the position of one-way seals, prevents one-way seals up；One-way seals is contained on central tube, can move axially along central tube；Spring housing is located on central tube, between one-way seals and lower contact；The top of described central tube is provided with the first valve port, middle part is provided with the second valve port；First valve port position between top connection, spacing ring, connection tubing string inside and described annular space；Second valve port is positioned at the bottom of spacing ring, and one-way seals moves when contacting to top with spacing ring, and the second valve port is not sealed by one-way seals, can be by the second sealing valve port when one-way seals moves down；The bottom of described sleeve is provided with the 3rd valve port, and described second valve port can switch the connection with described 3rd valve port or closedown with the movement of one-way seals.
Differential-pressurtype type pressure release valve of marine deep well pipe column the most according to claim 1, it is characterised in that: the elastic force of described spring calculates setting according to given standard of suppressing so that it is can adapt to different suppress operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707874.6A CN103696734B (en) | 2013-12-20 | 2013-12-20 | Differential-pressurtype type pressure release valve of marine deep well pipe column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310707874.6A CN103696734B (en) | 2013-12-20 | 2013-12-20 | Differential-pressurtype type pressure release valve of marine deep well pipe column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103696734A CN103696734A (en) | 2014-04-02 |
| CN103696734B true CN103696734B (en) | 2016-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310707874.6A Active CN103696734B (en) | 2013-12-20 | 2013-12-20 | Differential-pressurtype type pressure release valve of marine deep well pipe column |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455929Y (en) * | 2000-11-17 | 2001-10-24 | 中国石油天然气股份有限公司 | Underground water injection circulating valve |
| CN2809207Y (en) * | 2005-06-03 | 2006-08-23 | 黄学忠 | Down-hole one-way constant pressure valve |
| CN2869287Y (en) * | 2006-02-28 | 2007-02-14 | 大庆赛科科技有限公司 | Self-locking oil pipe discharge anchor |
| CN201265391Y (en) * | 2008-09-18 | 2009-07-01 | 吐哈石油勘探开发指挥部工程技术研究院 | High-pressure difference large-aperture gas-tight back-flushing valve for oil-gas field |
| GB2457497A (en) * | 2008-02-15 | 2009-08-19 | Pilot Drilling Control Ltd | Flow stop valve controlled by pressure difference |
| CN203655229U (en) * | 2013-12-20 | 2014-06-18 | 东营市福利德石油科技开发有限责任公司 | Pressure differential pressure release valve for ocean deep well string |
-
2013
- 2013-12-20 CN CN201310707874.6A patent/CN103696734B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2455929Y (en) * | 2000-11-17 | 2001-10-24 | 中国石油天然气股份有限公司 | Underground water injection circulating valve |
| CN2809207Y (en) * | 2005-06-03 | 2006-08-23 | 黄学忠 | Down-hole one-way constant pressure valve |
| CN2869287Y (en) * | 2006-02-28 | 2007-02-14 | 大庆赛科科技有限公司 | Self-locking oil pipe discharge anchor |
| GB2457497A (en) * | 2008-02-15 | 2009-08-19 | Pilot Drilling Control Ltd | Flow stop valve controlled by pressure difference |
| CN201265391Y (en) * | 2008-09-18 | 2009-07-01 | 吐哈石油勘探开发指挥部工程技术研究院 | High-pressure difference large-aperture gas-tight back-flushing valve for oil-gas field |
| CN203655229U (en) * | 2013-12-20 | 2014-06-18 | 东营市福利德石油科技开发有限责任公司 | Pressure differential pressure release valve for ocean deep well string |
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| Publication number | Publication date |
|---|---|
| CN103696734A (en) | 2014-04-02 |
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Inventor after: Wang Wei Inventor after: Zhao Feifei Inventor after: Mei Mingxia Inventor after: Deng Hui Inventor after: Diao Qiang Inventor after: Luo Wei Inventor after: Jiao Qingqing Inventor after: Song Yifeng Inventor after: Xu Tengfei Inventor after: Liu Xiaolong Inventor before: Wang Wei Inventor before: Zhao Fei Inventor before: Mei Mingxia Inventor before: Deng Hui Inventor before: Diao Qiang Inventor before: Luo Wei Inventor before: Jiao Qingqing Inventor before: Song Yifeng Inventor before: Xu Tengfei Inventor before: Liu Xiaolong |
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Denomination of invention: Differential pressure relief valve for marine deep well string Effective date of registration: 20211227 Granted publication date: 20160824 Pledgee: YI XIN Co.,Ltd. Pledgor: DONGYING FLUID SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2021980016273 |
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Date of cancellation: 20220401 Granted publication date: 20160824 Pledgee: YI XIN Co.,Ltd. Pledgor: DONGYING FLUID SCIENCE & TECHNOLOGY CO.,LTD. Registration number: Y2021980016273 |
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