CN101338657A - Hydraulically controlled underbalance downhole casing valve - Google Patents
Hydraulically controlled underbalance downhole casing valve Download PDFInfo
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- CN101338657A CN101338657A CNA2007101377185A CN200710137718A CN101338657A CN 101338657 A CN101338657 A CN 101338657A CN A2007101377185 A CNA2007101377185 A CN A2007101377185A CN 200710137718 A CN200710137718 A CN 200710137718A CN 101338657 A CN101338657 A CN 101338657A
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- urceolus
- inner core
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- annular space
- outer cylinder
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Abstract
The present invention relates to a hydraulic controlled underbalance downhole casing valve. The inner surface of an upper outer cylinder (3) is processed into a ladder form. A tube valve assembly (5) is arranged in an annular space among the upper outer cylinder (3), a lower outer cylinder (4) and an inner cylinder (2). A lug boss is arranged in an inner cavity of an upper joint (1). The outer surface of the inner cylinder (2) is also provided with a lug boss. The upper outer cylinder (3) and the inner cylinder (2) are in clearance fit. A hydraulic cavity (8) is formed at the lug boss of the inner cavity of the upper joint (1), the lug boss of the outer surface of the inner cylinder (2) and the inner surface of the upper outer cylinder (3). The hydraulic cavity (9) is formed at the lower part of the lug boss of the inner cylinder (2) and the inner cavity of the upper outer cylinder (3). The top of the upper outer cylinder (3) is provided with a plurality of axial holes. A hydraulic control system is connected with the holes by a pipeline, wherein, two holes are respectively communicated with the hydraulic cavities (8 and 9). The hole (7) at the upper outer cylinder (3) is communicated with the annular space which is formed between the upper outer cylinder (3) and the tube valve assembly (5). When the casing valve is closed, the pressure under a well can be monitored through the hole (7) of the outer cylinder (3).
Description
Technical field
The present invention relates to the underbalance downhole casing valve that uses in a kind of oil gas field under balance pressure drilling, the completion practice process.
Background technology
Under-balanced drilling technology had had rapidly development in recent years, and especially the underbalance downhole hole-closure device is applied under balance pressure drilling and makes the under balance pressure drilling of overall process be able to smooth implementation.But with regard to underbalance downhole hole-closure device technology itself and imperfection, mainly be in the use of underbalance downhole hole-closure device, the one, after underbalance downhole hole-closure device hyoplastron is closed for a long time, because the migration of formation gas, hyoplastron will produce bigger negative pressure down, and, when surpassing certain value, negative pressure under the downhole hole-closure device hyoplastron can damage hyoplastron along with the hyoplastron shut-in time increases and increases.Do not grasp negative pressure value under the hyoplastron owing to ground in addition, thereby can't accurately control the pressure of pit shaft, bring hidden danger for the switch of underbalance downhole hole-closure device hyoplastron, misoperation can be damaged hyoplastron.The 2nd, because the opening of hyoplastron can't be accurately grasped on ground, if underbalance downhole hole-closure device hyoplastron is not opened fully, then this bores at present and can damage hyoplastron in underbalance downhole hole-closure device open and close process.
Summary of the invention
The object of the present invention is to provide a kind of underbalance downhole casing valve of hydraulic control, can measure, realize the effective monitoring of drilling operation course bottom pressure to bottom pressure.
The present invention mainly is made up of top connection 1, inner core 2, last urceolus 3, following urceolus 4, pipe valve assembly 5, lower contact 6, and last urceolus 3 is with top connection 1 and play urceolus 4 by being threaded.Last urceolus 3 inner surfaces are staged, and pipe valve assembly 5 is in urceolus 3, plays in the annular space between urceolus 4 and the inner core 2; Top connection 1 inner chamber has a boss, at the external surface of inner core 2 boss is arranged also, and last urceolus 3 be a matched in clearance with inner core 2, reaches urceolus 3 inner surfaces formation hydraulic cavities 8 at the boss of the boss of top connection 1 inner chamber and inner core 2 external surfaces; Boss lower part at inner core 2 forms hydraulic cavities 9 with last urceolus 3 inner chambers; There are several axial holes last urceolus 3 upper ends; Hydraulic control system links to each other with the hole by pipeline; Wherein two holes communicate with hydraulic cavities 8,9 hydraulic cavities respectively, form an annular space between last urceolus 3 bottoms and the inner core 2, and the hole 7 on the last urceolus 3 is connected with this annular space, and the annular space of formation between this annular space and last urceolus 3 and the pipe valve assembly 5 communicates.
Beneficial effect of the present invention is: when casing valve is a closed condition, casing valve is opened, only must be suppressed in a looped pipeline, pressure enters hydraulic cavities 8 promotion inner cores 2 and moves downward through the hole of last urceolus 3, and the hyoplastron that inner core 2 promotes on the pipe valve assemblies 5 is opened.Casing valve is closed, so only must suppress in another root looped pipeline, pressure enters hydraulic cavities 9 promotion inner cores 2 and moves upward through the hole of last urceolus 2, and the hyoplastron on the pipe valve assembly 5 is closed under the effect of auxilliary spring.When casing valve is closed condition, can carry out the down-hole pressure monitoring by the hole 7 of last urceolus 3.
Description of drawings
Fig. 1 structural representation of the present invention
The specific embodiment
The present invention will be further described in detail below in conjunction with accompanying drawing.
Can log well the as shown in drawings a kind of underbalance downhole casing valve of hydraulic control of bottom pressure, mainly by top connection 1, inner core 2, go up urceolus 3, urceolus 4, pipe valve assembly 5, lower contact 6 are formed down, last urceolus 3 and top connection 1 reach down urceolus 4 by being threaded.Last urceolus 3 inner surfaces are staged, and pipe valve assembly 5 is in urceolus 3, plays in the annular space between urceolus 4 and the inner core 2; Top connection 1 inner chamber has a boss, at the external surface of inner core 2 boss is arranged also, and last urceolus 3 be a matched in clearance with inner core 2, reaches urceolus 3 inner surfaces formation hydraulic cavities 8 at the boss of the boss of top connection 1 inner chamber and inner core 2 external surfaces; Boss lower part at inner core 2 forms hydraulic cavities 9 with last urceolus 3 inner chambers; There are several axial holes last urceolus 3 upper ends; Hydraulic control system links to each other with the hole by pipeline; Wherein two holes communicate with hydraulic cavities 8,9 hydraulic cavities respectively, form an annular space between last urceolus 3 bottoms and the inner core 2, and the hole 7 on the last urceolus 3 is connected with this annular space, and the annular space of formation between this annular space and last urceolus 3 and the pipe valve assembly 5 communicates.
When being lowered to protective casing, on protective casing, insert casing valve in advance, be connected to two looped pipelines at the annular space of casing valve and upper level sleeve pipe.When casing valve is a closed condition, casing valve is opened, only must in a looped pipeline, suppress, pressure enters hydraulic cavities 8 promotion inner cores 2 and moves downward through the hole of last urceolus 3, and the hyoplastron that inner core 2 promotes on the pipe valve assemblies 5 is opened.Casing valve is closed, so only must suppress in another root looped pipeline, pressure enters hydraulic cavities 9 promotion inner cores 2 and moves upward through the hole of last urceolus 2, and the hyoplastron on the pipe valve assembly 5 is closed under the effect of auxilliary spring.When casing valve is closed condition, can carry out the down-hole pressure monitoring by the hole 7 of last urceolus 3.
Claims (1)
1, a kind of underbalance downhole casing valve of hydraulic control, mainly form by top connection (1), inner core (2), last urceolus (3), following urceolus (4), pipe valve assembly (5), lower contact (6), last urceolus (3) reaches following urceolus (4) by being threaded with top connection (1), it is characterized in that: last urceolus (3) inner surface is a staged, and pipe valve assembly (5) is in urceolus (3), plays in the annular space between urceolus (4) and the inner core (2); Top connection (1) inner chamber has a boss, external surface at inner core (2) also has a boss, last urceolus (3) is a matched in clearance with inner core (2), reaches upward urceolus (3) inner surface formation hydraulic cavities (8) at the boss of top connection (1) inner chamber and the boss of inner core (2) external surface; Boss lower part and last urceolus (3) inner chamber at inner core (2) form hydraulic cavities (9); There are several axial holes last urceolus (3) upper end; Hydraulic control system links to each other with the hole by pipeline; Wherein two holes communicate with hydraulic cavities (8,9) hydraulic cavities respectively, form an annular space between last urceolus (3) bottom and the inner core (2), hole (7) on the last urceolus (3) is connected with this annular space, and the annular space that forms between this annular space and last urceolus (3) and the pipe valve assembly (5) communicates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101377185A CN101338657B (en) | 2007-07-06 | 2007-07-06 | Hydraulically controlled underbalance downhole casing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007101377185A CN101338657B (en) | 2007-07-06 | 2007-07-06 | Hydraulically controlled underbalance downhole casing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101338657A true CN101338657A (en) | 2009-01-07 |
| CN101338657B CN101338657B (en) | 2012-07-11 |
Family
ID=40212810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101377185A Expired - Fee Related CN101338657B (en) | 2007-07-06 | 2007-07-06 | Hydraulically controlled underbalance downhole casing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101338657B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493785A (en) * | 2011-12-02 | 2012-06-13 | 中国石油集团长城钻探工程有限公司 | Automatic control sleeve valve |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4306623A (en) * | 1979-08-06 | 1981-12-22 | Baker International Corporation | Valve assembly for a subterranean well conduit |
| CN2612797Y (en) * | 2002-12-24 | 2004-04-21 | 宝鸡石油机械有限责任公司 | Pressure transposition annular pressure control spherical test switch valve |
| CN2697310Y (en) * | 2004-04-22 | 2005-05-04 | 新疆石油管理局钻井工艺研究院 | Under-balance downhole casing-valve |
| CN2690586Y (en) * | 2004-04-28 | 2005-04-06 | 新疆石油管理局钻井工艺研究院 | Under balance under well casing valve |
| CN200978652Y (en) * | 2006-08-07 | 2007-11-21 | 新疆石油管理局钻井工艺研究院 | Hydraulic control under-balanced downhole casing valve |
-
2007
- 2007-07-06 CN CN2007101377185A patent/CN101338657B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102493785A (en) * | 2011-12-02 | 2012-06-13 | 中国石油集团长城钻探工程有限公司 | Automatic control sleeve valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101338657B (en) | 2012-07-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20090206 Address after: Hongyan road Karamay City, No. 80 the Xinjiang Uygur Autonomous Region Applicant after: KARAMAY DRILLING TECHNOLOGY Research Institute WESTERN DRILLING ENGINEERING CORPORATION OF CNPC Address before: Hongyan road Karamay City, No. 80 the Xinjiang Uygur Autonomous Region Applicant before: Drilling Technology Research Institute of Xinjiang Petroleum Administration Bure |
|
| ASS | Succession or assignment of patent right |
Owner name: WEST DRILLING KARAMAY DRILLING CRAFT RESEARCH INST Free format text: FORMER OWNER: DRILLING WELL TECHNOLOGY INSTITUTE, PETROLEUM ADMINISTRATION BUREAU, XINJIANG Effective date: 20090206 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 |