CN203655229U - Pressure differential pressure release valve for ocean deep well string - Google Patents
Pressure differential pressure release valve for ocean deep well string Download PDFInfo
- Publication number
- CN203655229U CN203655229U CN201320846114.9U CN201320846114U CN203655229U CN 203655229 U CN203655229 U CN 203655229U CN 201320846114 U CN201320846114 U CN 201320846114U CN 203655229 U CN203655229 U CN 203655229U
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- Prior art keywords
- valve port
- central tube
- way seals
- sleeve
- top connection
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- 238000007789 sealing Methods 0.000 claims abstract description 13
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract description 2
- 239000007788 liquid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 5
- 239000012530 fluid Substances 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000013535 sea water Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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Abstract
The utility model relates to a pressure differential pressure release valve for an ocean deep well string. The pressure differential pressure release valve for the ocean deep well string comprises an upper connector, a sleeve, a central pipe, a one-way sealing element, a limiting ring, springs and a lower connector, wherein the central pipe is in threaded connection with the upper connector and the lower connector and is sealed; the sleeve is in threaded connection with the upper connector; the limiting ring is fixedly arranged at the middle part of the central pipe through a pin, the one-way sealing element is installed on the central pipe, the springs are sleeved on the central pipe and are positioned between the one-way sealing element and the lower connector; a first valve port is formed in the upper part of the central pipe, and a second valve port is formed in the middle part of the central pipe; the first valve port is formed in a position between the upper connector and the limiting ring and is communicated with the inside of the string and an annular space; the second valve port is formed in the lower part of the limiting ring. The pressure differential pressure release valve for the ocean deep well string has the beneficial effects that the structure is simple, and the maintenance is convenient; the pressure required for communication inside and outside the string or closing can be controlled through changing the elasticity of the springs; the pressure can be continuously released when the string is lifted, and the problem of over-high pressure in the string caused by the lifting of the string needs not to be worried.
Description
Technical field
The utility model belongs to oil exploration and development fields, particularly, relates to the differential relief valve of a kind of ocean deep well pipe column; For reduce in time the inner high pressure producing of tubing string in upper lifting pipe post process, prevent that packer mistake is setting.
Background technology
At present, while separating tubing string or setting tubing string with packer on ocean, lower termination plug or the ball-and-seat of combined string, because the lower space of tubing string inner space especially tubing string is relatively airtight, in upper lifting pipe post process, the liquid stream of tubing string inside can not be got rid of in time, tubing string is inner can overstock very long one section of fluid column higher than horizontal plane, tubing string internal pressure is raise gradually, easily cause packer mistake setting, cause more serious down-hole accident, the tubing string inside being brought up also fills seawater, and dismounting tubing string bothers very much.
Utility model content
For overcoming the defect existing in prior art, the utility model provides a kind of ocean deep well pipe column differential relief valve, the differential relief valve of ocean deep well pipe column can be in opening in upper lifting pipe post process, makes the inside and outside connection of tubing string, in time the liquid in tubing string is discharged, prevent the inner higher differential pressure that produces of tubing string, and while wanting base sealed packer, suppress the closing presure to relief valve, relief valve can be in closed condition, be equivalent to an airtight oil pipe, do not affect the setting of packer.
For achieving the above object, the utility model adopts following proposal:
The differential relief valve of a kind of ocean deep well pipe column, comprising: 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;
Upper end, the lower end of central tube are equipped with external screw thread;
The upper end of sleeve is provided with internal thread;
Central tube is connected with top connection and is sealed by the external screw thread of upper end;
Central tube is connected with lower contact and is sealed by the external screw thread of lower end;
Sleeve is threaded with top connection by the internal thread of upper end;
Spacing ring is fixed by a pin to the middle part of central tube, and the position of restriction one-way seals, prevents that one-way seals is 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; The position of the first valve port between top connection, spacing ring, is communicated with tubing string inside and described annular space; The second valve port is positioned at the bottom of spacing ring, and when one-way seals moves to top and contacts with spacing ring, 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 and being communicated with or closing of described valve port with the movement of one-way seals.
With respect to prior art, the beneficial effects of the utility model are:
(1), simple in structure, easy to maintenance;
(2), can control the connection inside and outside tubing string or close needed pressure by the elastic force that changes spring;
(3), can continue pressure release when upper lifting pipe post, needn't worry again because upper lifting pipe post causes the too high problem of tubing string internal pressure.Therefore, the utility model can be accelerated speed of application, and can guarantee that work progress is more safe and reliable, can serve as the useful of relevant construction sequence and supplement.
Accompanying drawing explanation
Fig. 1 is the structural representation of the differential relief valve of ocean deep well pipe column of the present utility model;
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.
The specific embodiment
As shown in Figure 1, the differential relief valve of ocean deep well pipe column, comprising: 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;
Upper end, the lower end of central tube 3 are equipped with external screw thread;
The upper end of sleeve 2 is provided with internal thread;
Sleeve 2 is threaded with top connection 1 by the internal thread of upper end; Between top connection 1 and sleeve 2, be provided with sealing ring 8 and anti-rotation pin 9, guarantee fastness and the sealing performance of the two connection.
One-way seals 4 is contained on central tube 3, can move axially, and guarantees the good seal performance by top connection 1, sleeve 2, central tube 3,4 looping spaces of one-way seals.
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; The position of the first valve port 301 between top connection 1, spacing ring 5, is communicated with tubing string inside and described annular space, and annular space internal pressure is changed with the change of tubing string internal pressure; The second valve port 302 is positioned at the bottom of spacing ring 5, and when one-way seals 4 moves to top and contacts with spacing ring 5, the second valve port 302 is not sealed by one-way seals 4, when one-way seals moves down, the second valve port 302 can be sealed.
The bottom of described sleeve 2 is provided with the 3rd valve port 201, and described valve port 302 can switch and being communicated with or closing of described valve port 201 with the movement of one-way seals 4.
Described valve port 302 moves being communicated with or closing of switching and described valve port 201 with described one-way seals 4, thereby, can realize the inside and outside connection of tubing string or close.Because the open and close of valve port 302 are to flow by the inner liquid of tubing string the active force that one-way seals 4 is produced to determine with the difference between the elastic force of spring 6, can control the unlatching of valve port 302 or the force value of closing by the elastic force that changes spring 6.
Liquid stream in tubing string has two kinds of flow directions: a kind of is that liquid stream flows into by the first valve port 301 confined space being made up of top connection 1, sleeve 2, central tube 3, one-way seals 4; One is that liquid stream passes through the second valve port 302, flows to tubing string outside via valve port 201.When tubing string internal pressure hour, spring can support one-way seals 4, makes it cannot continue descending guarantee instrument and can bring into play well the function of its pressure release; In the time that tubing string internal pressure increases, active force that duct fluid flow produces one-way seals 4 increases, and makes one-way seals 4 continue to overcome the elastic force of spring 6 and descending, and valve port 302 is closed, and liquid stream no longer flows out from valve port 201, and relief valve becomes sealing state.
In the time that tubing string small displacement is suppressed, liquid fails to be convened for lack of a quorum and flows to tubing string outside by described valve port 302 via described valve port 201, is similar to slow upper lifting pipe post, the pressure release in time of tubing string inside; In the time that the large discharge capacity of tubing string is suppressed, liquid stream flows into described airtight annular space by described valve port 301, and promoting one-way seals, to overcome the elastic force of spring descending, described valve port 302 is closed, liquid stream no longer flows to tubing string outside, and tubing string inside is sealing state, to carry out follow-up working procedure.
The ocean of the present utility model differential relief valve of deep well pipe column is connected to the lower end of operating tool string, for example, look in working procedure leakage at sleeve pipe, relief valve is connected to below packer, in the time that needs are suppressed set packer, larger discharge capacity is suppressed tubing string, relief valve can be in closed condition, and shape, as a sleeve pipe, does not affect the running of other instruments, when on while carrying operating tool string, tubing string internal pressure is less, and relief valve, in opening, makes tubing string inside only have less pressure, prevent packer setting, cause occurring down-hole accident.
Claims (3)
1. the differential relief valve of ocean deep well pipe column, comprising: 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;
Upper end, the lower end of central tube are equipped with external screw thread;
The upper end of sleeve is provided with internal thread;
Central tube is connected with top connection and is sealed by the external screw thread of upper end;
Central tube is connected with lower contact and is sealed by the external screw thread of lower end;
Sleeve is threaded with top connection by the internal thread of upper end;
Spacing ring is fixed by a pin to the middle part of central tube, and the position of restriction one-way seals, prevents that one-way seals is 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; The position of the first valve port between top connection, spacing ring, is communicated with tubing string inside and described annular space; The second valve port is positioned at the bottom of spacing ring, and when one-way seals moves to top and contacts with spacing ring, 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 and being communicated with or closing of described valve port with the movement of one-way seals.
2. the differential relief valve of ocean according to claim 1 deep well pipe column, is characterized in that: between top connection and sleeve, be provided with sealing ring and anti-rotation pin, guarantee fastness and the sealing performance of top connection, the two connection of sleeve.
3. the differential relief valve of ocean according to claim 1 and 2 deep well pipe column, is characterized in that: the elastic force of described spring calculates setting according to the given standard of suppressing, and can adapt to the different operations of suppressing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846114.9U CN203655229U (en) | 2013-12-20 | 2013-12-20 | Pressure differential pressure release valve for ocean deep well string |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320846114.9U CN203655229U (en) | 2013-12-20 | 2013-12-20 | Pressure differential pressure release valve for ocean deep well string |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203655229U true CN203655229U (en) | 2014-06-18 |
Family
ID=50921629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320846114.9U Expired - Fee Related CN203655229U (en) | 2013-12-20 | 2013-12-20 | Pressure differential pressure release valve for ocean deep well string |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203655229U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696734A (en) * | 2013-12-20 | 2014-04-02 | 东营市福利德石油科技开发有限责任公司 | Differential-pressure type pressure release valve of marine deep well pipe column |
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
| CN109185120A (en) * | 2018-11-14 | 2019-01-11 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of quick plunger of combined type adapting to complicated shaft structure |
-
2013
- 2013-12-20 CN CN201320846114.9U patent/CN203655229U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696734A (en) * | 2013-12-20 | 2014-04-02 | 东营市福利德石油科技开发有限责任公司 | Differential-pressure type pressure release valve of marine deep well pipe column |
| CN103696734B (en) * | 2013-12-20 | 2016-08-24 | 东营市福利德石油科技开发有限责任公司 | Differential-pressurtype type pressure release valve of marine deep well pipe column |
| CN104196491A (en) * | 2014-08-20 | 2014-12-10 | 何富全 | Oil-water well hydraulic power assisted oil sleeve technological communication device |
| CN104196491B (en) * | 2014-08-20 | 2016-07-06 | 何富全 | Oil water well hydraulic power-assisted oil jacket technique intercommunicating device |
| CN109185120A (en) * | 2018-11-14 | 2019-01-11 | 中国石油化工股份有限公司江汉油田分公司石油工程技术研究院 | A kind of quick plunger of combined type adapting to complicated shaft structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20161220 |
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| CF01 | Termination of patent right due to non-payment of annual fee |