CN106703750A - Deep water sleeve high pressure spring type decompression valve - Google Patents
Deep water sleeve high pressure spring type decompression valve Download PDFInfo
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- CN106703750A CN106703750A CN201510776020.2A CN201510776020A CN106703750A CN 106703750 A CN106703750 A CN 106703750A CN 201510776020 A CN201510776020 A CN 201510776020A CN 106703750 A CN106703750 A CN 106703750A
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- ball seat
- spring
- deep water
- high pressure
- relief valve
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Abstract
The invention relates to a deep water sleeve high pressure spring type decompression valve. The deep water sleeve high pressure spring type decompression valve comprises a valve body internally provided with an axial channel, a ball base and a spring base; the inside of the valve body is provided with a valve body inner cavity communicated with the axial channel, the ball base is arranged on the axial channel, the inside of the ball base is communicated with the axial channel and the valve body inner cavity respectively, the spring base is arranged in the valve body inner cavity corresponding to the ball base, and the inside of the spring base is communicated with the axial channel and the valve body inner cavity respectively; the end, facing the ball base, of the spring base is provided with a sealing ball to form pressure sealing and control pressure at the two ends of the decompression valve; a safe hole communicated with the inside of the spring base is arranged in the sealing ball. The deep water sleeve high pressure spring type decompression valve is simple in structure and beneficial to reducing the size, meets the demand of multiple sleeve sizes and annular pressure, automatic starting-closing of the valve is achieved through the spring base, annular inner pressure of the sleeve is adjusted, overpressure protection of the shaft integrity can be achieved without reducing the yield or adopting a well completion method with high expense and high technical difficulty, the decompression pressure can be optionally adjusted, and installation and dismounting are convenient.
Description
Technical field
The present invention relates to a kind of deep water tool of production, more particularly to a kind of deep water casing high pressure spring pressure release
Valve.
Background technology
Due to the marine environment of deep water, seabed and shallow stratum temperature are low, and the temperature of reservoir fluid is high.
In oil and gas well testing and production process, the fluid temperature (F.T.) in each layer casing annulus confined space can be made notable
Increase, so as to cause the acute phenomenon for rising of the pressure in confined space.Deep water uses underwater well head, is different from
Land and the dry type well head of shallow water, it is impossible to the release of annular pressure is carried out in production and test process, is entered
And serious harm can be brought to wellbore integrity.At present, for the control method of deep water annular pressure,
Mainly by the way of oil gas well production is limited, and this has had a strong impact on productivity effect, and for deep water set
Pressure monitoring accuracy is not high in pipe ring is empty, easily occurs accident aborning.
Use compressible foam material and rupture disk more the deep water pit shaft control aspect both at home and abroad at present, can press
Contracting foamed material is easily influenceed by casing programme and stratum high-temperature, rupture disk destruction wellbore integrity.Relief valve
Using less, its reason is that the physical dimension of traditional relief valve is larger, and Opening pressure control is not enough, and often
The consumable accessory for advising relief valve is more, easily produces failure.
The content of the invention
The technical problem to be solved in the present invention is, there is provided a kind of simple structure, reliability, meets various sets
The deep water casing high pressure Spring-Loaded Pressure Relief Valve of pipe size and annular pressure demand.
The technical solution adopted for the present invention to solve the technical problems is：A kind of deep water casing bomb is provided
Spring formula relief valve, including the interior valve body for having axial passage, ball seat and spring base；The valve inner sets
There is internal diameter to be more than the axial passage internal diameter and the body cavity being connected with the axial passage, the ball
Seat is arranged on the axial passage and is connected with the axial passage and body cavity respectively inside it,
The relatively described ball seat of the spring base is arranged in the body cavity and logical with the axial direction respectively inside it
Road is connected with body cavity；
The spring base is provided with ball sealer and forms pressure seal with the ball seat towards one end of the ball seat,
Control relief valve pressure at two ends；The safety vent connected with spring base inside is provided with the ball sealer.
Preferably, the spring base includes relatively retractable sealed ball seat and closure and is connected to
Spring between the sealed ball seat and closure；The ball sealer is arranged on the sealed ball seat near institute
State on the side of ball seat；
The sealing is covered with axially through to the inner passage of the body cavity, and the sealed ball seat sets
There are the ball seat passage being connected with the body cavity and inner passage, and the ball seat passage positioned at described
Ball sealer periphery.
Preferably, the inner passage includes the less first end of internal diameter and the second larger end of internal diameter, institute
The second end is stated near the sealed ball seat；
The sealed ball seat is provided with corresponding with second end convex towards the side of the closure
Platform；When the closure is closed on the sealed ball seat, the boss is inserted in second end.
Preferably, the periphery of the boss is provided with the annular groove of indent, and the closure is towards the sealing
The end face of ball seat is retractable in the annular groove.
Preferably, the diameter of the boss is consistent with the internal diameter at second end.
Preferably, the second end of the inner passage is tapered, and with less one end of internal diameter and described
One end connects.
Preferably, the two ends of the spring are respectively welded on the sealed ball seat and closure.
Preferably, the ball seat is connected in the valve body by thread seal；
The spring base is connected in the valve body by thread seal.
Preferably, the periphery of the valve body is provided with the external screw thread coordinated with sleeve pipe.
Preferably, the valve body includes the larger first paragraph and the less second segment of external diameter of external diameter, the bullet
Spring abutment is arranged in the first paragraph, and the ball seat is arranged on the second segment；The external screw thread is located at
The periphery of the first paragraph.
The present invention is rational in infrastructure, beneficial to size smallization, meets the demand of various casing sizes and annular pressure,
The automatic open close of valve is realized by spring base, pressure in adjusting sleeve pipe annular space is not required to reduce yield or use
The big completion mode of costly technical difficulty is to be capable of achieving the overpressure protection to wellbore integrity, vent pressure
Can arbitrarily adjust, installation, convenient disassembly.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing：
Fig. 1 is that the stereochemical structure of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention is illustrated
Figure；
Fig. 2 is the top view of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention and along B-B
The sectional view of line；
Fig. 3 is the side view of the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention and along G-G
The sectional view of line.
Specific embodiment
In order to be more clearly understood to technical characteristic of the invention, purpose and effect, accompanying drawing is now compareed
Describe specific embodiment of the invention in detail.
As shown in Figure 1, 2, the deep water casing high pressure Spring-Loaded Pressure Relief Valve of one embodiment of the invention, including it is interior
There are valve body 10, ball seat 20 and the spring base 30 of axial passage 11, be provided with internal diameter inside valve body 10 big
In the internal diameter of axial passage 11 and the body cavity 12 that is connected with axial passage 11, ball seat 20 is arranged on axle
It is connected with axial passage 11 and body cavity 12 respectively on passage 11 and inside it, spring base 30
Be arranged in body cavity 12 with respect to ball seat 20 and inside it respectively with axial passage 11 and body cavity 12
It is connected.Wherein, spring base 30 is provided with ball sealer 31 and is formed with ball seat 20 towards one end of ball seat 20
Pressure seal, controls relief valve pressure at two ends；The relief valve is installed on sleeve pipe, controls the side pressure of sleeve pipe two
Power, it is ensured that sleeve pipe does not occur to squeeze to be ruined.The safety vent connected with the inside of spring base 30 is provided with ball sealer 31
32, the depth and radius size of safety vent 32 constitute fracture mechanism according to the wellbore pressure design of design,
The relief valve pressure at two ends serious unbalance for blocking or pressure anomaly is caused is prevented, the reality of field engineering is met
Need.
Again as shown in Figure 1, 2, the periphery of valve body 10 is provided with the external screw thread 13 coordinated with sleeve pipe.
Valve body 10 may include the larger first paragraph 14 of external diameter and the less second segment 15 of external diameter, body cavity
12 are located in first paragraph 14, so that spring base 30 is arranged in first paragraph 14, ball seat 20 is arranged on the
On two section 15.External screw thread 13 is located at the periphery of first paragraph 14, and relief valve is installed to when on sleeve pipe, will
The screw-internal thread fit of external screw thread 13 and sleeve pipe.
Ball seat 20 can be connected in valve body 10 by thread seal.Specifically, as shown in (2) in Fig. 2,
Ball seat 20 is fitted snugly on the axial passage 11 of valve body 10.Ball seat 20 is towards one end of spring base 30
End face is the cambered surface coordinated with ball sealer 31, so as to when spring base 30 is closed on ball seat 20, seal
Ball 31 can close one end of ball seat 20.
Spring base 30 can be also connected in valve body 10 by thread seal.
Spring base 30 includes relatively retractable sealed ball seat 33 and closure 35 and is connected to sealing
Spring 34 between ball seat 33 and closure 35, ball sealer 31 is arranged on sealed ball seat 33 near ball seat
On the side of 20 (away from closures 35).When the one end of valve body 10 is pressurized, spring 34 in spring base 30
Compression, closure 35 can be closed on sealed ball seat 33, and the movable belt dynamic sealing ball of sealed ball seat 33
31 are coupled on ball seat 20.When pressure is removed, spring 34 is replied, and drives the self sealss ball seat of closure 35
Movement is opened on 33.
Preferably, ball sealer 31 and sealed ball seat 33 are structure as a whole.
As shown in (2) in Fig. 2, closure 35 is provided with axially through to the inner passage of body cavity 12,
Sealed ball seat 33 is provided with the ball seat passage 331 being connected with body cavity 12 and inner passage, and ball seat is logical
Road 331 is located at the periphery of ball sealer 31.
Further, inner passage may include the less first end 351 of internal diameter and the second larger end of internal diameter
352, the second end 352 is near sealed ball seat 33.Second end 352 of inner passage is tapered, and with internal diameter
Less one end connects with first end 351.
Sealed ball seat 33 is provided with the boss 332 corresponding with the second end 352 towards the side of closure 35；
When closure 35 is closed on sealed ball seat 33, boss 332 is inserted in the second end 352.Boss 332
Circumferential lateral surface can correspond to the taper surface at the second end 352 for inclined-plane, both match.
The periphery of boss 332 is provided with the annular groove 333 of indent, and closure 35 is towards the end of sealed ball seat 33
Face is retractable in annular groove 333.
The diameter of boss 332 is consistent with the internal diameter at the second end 352, and the second end 352 is inserted in boss 332
When interior, second end 352 can be closed；Meanwhile, the end face of closure 35 is coupled in annular groove 333.
As shown in Figure 2,3, boss 332 is located at the medium position of sealed ball seat 33, and safety vent 32 is opened up
In the center of boss 332.Ball seat passage 331 can be provided with multiple, and interval is evenly distributed on safety vent 32
Periphery., not through ball sealer 31, the depth of safety vent 32 and radius size are according to design for the safety vent 32
Wellbore pressure design, constitute fracture mechanism, be mainly used in preventing that ball seat passage 331 from blocking or pressure is different
The relief valve pressure at two ends serious unbalance for often resulting in.
Spring 34 is fixedly connected between closure 35 and sealed ball seat 33.Preferably, spring 34
Two ends are respectively welded on sealed ball seat 33 and closure 35.Setting of the spring 34 on spring base 30,
Do not contacted with axial passage 11, will not occurred because of spring failure problem caused by exogenous impurity.
When the present invention is used, annular space control pressure size is determined, pressed according to determining that control pressure selection is opened
The suitable spring 34 of power and safety vent 32, spring base 30 and ball seat 20 are installed on valve body 10 and are constituted
Deep water casing high pressure Spring-Loaded Pressure Relief Valve, is then installed on sleeve pipe.
Deep water casing high pressure Spring-Loaded Pressure Relief Valve of the invention, can realize stream in deep water HTHP sleeve pipe
Body Stress control, according to different pressures can be convenient for changing various springs and sealed ball seat 33 is combined, and meet
Field engineering is actually needed.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every
The equivalent structure or equivalent flow conversion made using description of the invention and accompanying drawing content, or directly or
Connect and be used in other related technical fields, be included within the scope of the present invention.
Claims (10)
1. a kind of deep water casing high pressure Spring-Loaded Pressure Relief Valve, it is characterised in that have axial passage including interior（11）Valve body（10）, ball seat（20）And spring base（30）；The valve body（10）Inside is provided with internal diameter more than the axial passage（11）Internal diameter and with the axial passage（11）The body cavity being connected（12）, the ball seat（20）It is arranged on the axial passage（11）It is upper and its inside respectively with the axial passage（11）And body cavity（12）It is connected, the spring base（30）Relatively described ball seat（20）It is arranged on the body cavity（12）In and its inside respectively with the axial passage（11）And body cavity（12）It is connected；
The spring base（30）Towards the ball seat（20）One end be provided with ball sealer（31）With the ball seat（20）Pressure seal is formed, relief valve pressure at two ends is controlled；The ball sealer（31）Inside it is provided with and the spring base（30）The safety vent of inside connection（32）.
2. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 1, it is characterised in that the spring base（30）Including relatively retractable sealed ball seat（33）And closure（35）And it is connected to the sealed ball seat（33）And closure（35）Between spring（34）；The ball sealer（31）It is arranged on the sealed ball seat（33）Near the ball seat（20）Side on；
The closure（35）It is provided with axially through the extremely body cavity（12）Inner passage, the sealed ball seat（33）It is provided with and the body cavity（12）The ball seat passage being connected with inner passage（331）, and the ball seat passage（331）Positioned at the ball sealer（31）Periphery.
3. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 2, it is characterised in that the inner passage includes the less first end of internal diameter（351）Second end larger with internal diameter（352）, second end（352）Near the sealed ball seat（33）；
The sealed ball seat（33）Towards the closure（35）Side be provided with and second end（352）Corresponding boss（332）；In the closure（35）Close at the sealed ball seat（33）When upper, the boss（332）Insert second end（352）It is interior.
4. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 3, it is characterised in that the boss（332）Periphery be provided with the annular groove of indent（333）, the closure（35）Towards the sealed ball seat（33）End face it is retractable to the annular groove（333）It is interior.
5. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 3, it is characterised in that the boss（332）Diameter and second end（352）Internal diameter it is consistent.
6. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 3, it is characterised in that the second end of the inner passage（352）It is tapered, and with the less one end of internal diameter and the first end（351）Connect.
7. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 2, it is characterised in that the spring（34）Two ends be respectively welded at the sealed ball seat（20）And closure（35）On.
8. the deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim any one of 1-7, it is characterised in that the ball seat（20）The valve body is connected to by thread seal（10）It is interior；
The spring base（30）The valve body is connected to by thread seal（10）It is interior.
9. the deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim any one of 1-7, it is characterised in that the valve body（10）Periphery be provided with sleeve pipe coordinate external screw thread（13）.
10. deep water casing high pressure Spring-Loaded Pressure Relief Valve according to claim 9, it is characterised in that the valve body（10）Including the first paragraph that external diameter is larger（14）With the less second segment of external diameter（15）, the spring base（30）It is arranged on the first paragraph（14）It is interior, the ball seat（20）It is arranged on the second segment（15）On；The external screw thread（13）Positioned at the first paragraph（14）Periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776020.2A CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510776020.2A CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106703750A true CN106703750A (en) | 2017-05-24 |
| CN106703750B CN106703750B (en) | 2019-04-12 |
Family
ID=58930253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510776020.2A Active CN106703750B (en) | 2015-11-12 | 2015-11-12 | Deep water casing high pressure Spring-Loaded Pressure Relief Valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106703750B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701147A (en) * | 2017-10-26 | 2018-02-16 | 中国石油大学(北京) | A kind of annular pressure downhole control valve |
| CN114059960A (en) * | 2020-08-04 | 2022-02-18 | 中国石油天然气股份有限公司 | Sleeve valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998003766A1 (en) * | 1996-07-19 | 1998-01-29 | Rick Picher | Downhole two-way check valve |
| CN2797611Y (en) * | 2005-04-29 | 2006-07-19 | 吉林石油集团有限责任公司 | Straight-through type fracture wellhead casing protector |
| CN200968199Y (en) * | 2006-09-30 | 2007-10-31 | 陈春生 | Oil well casing-pressure regulating apparatus |
| CN201129497Y (en) * | 2007-12-15 | 2008-10-08 | 李庆芝 | Multifunctional pressure test ball valve |
| CN201218081Y (en) * | 2008-06-11 | 2009-04-08 | 中国石油天然气股份有限公司 | Casing tube constant pressure deflation valve |
| CN202064892U (en) * | 2011-04-22 | 2011-12-07 | 中国石油天然气股份有限公司 | One-way constant pressure valve |
| CN203822268U (en) * | 2014-04-04 | 2014-09-10 | 张晓强 | Adjustable constant pressure exhaust device |
-
2015
- 2015-11-12 CN CN201510776020.2A patent/CN106703750B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998003766A1 (en) * | 1996-07-19 | 1998-01-29 | Rick Picher | Downhole two-way check valve |
| CN2797611Y (en) * | 2005-04-29 | 2006-07-19 | 吉林石油集团有限责任公司 | Straight-through type fracture wellhead casing protector |
| CN200968199Y (en) * | 2006-09-30 | 2007-10-31 | 陈春生 | Oil well casing-pressure regulating apparatus |
| CN201129497Y (en) * | 2007-12-15 | 2008-10-08 | 李庆芝 | Multifunctional pressure test ball valve |
| CN201218081Y (en) * | 2008-06-11 | 2009-04-08 | 中国石油天然气股份有限公司 | Casing tube constant pressure deflation valve |
| CN202064892U (en) * | 2011-04-22 | 2011-12-07 | 中国石油天然气股份有限公司 | One-way constant pressure valve |
| CN203822268U (en) * | 2014-04-04 | 2014-09-10 | 张晓强 | Adjustable constant pressure exhaust device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107701147A (en) * | 2017-10-26 | 2018-02-16 | 中国石油大学(北京) | A kind of annular pressure downhole control valve |
| CN107701147B (en) * | 2017-10-26 | 2023-11-10 | 中国石油大学(北京) | Annulus pressure underground control valve |
| CN114059960A (en) * | 2020-08-04 | 2022-02-18 | 中国石油天然气股份有限公司 | Sleeve valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106703750B (en) | 2019-04-12 |
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| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 518067 Offshore Oil Building, No. 1 Shekou Industrial Road, Shenzhen, Guangdong Province Applicant after: CNOOC Deepwater Development Limited Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China University of Petroleum (Beijing) Address before: 518067 Offshore Oil Building, No. 1 Shekou Industrial Road, Shenzhen, Guangdong Province Applicant before: CNOOC Deepwater Development Limited Applicant before: China National Offshore Oil Corporation Applicant before: China University of Petroleum (Beijing) |
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| CB02 | Change of applicant information | ||
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