CN105041252A - Internally-lifting safety assembly for pressure-maintaining coring - Google Patents

Internally-lifting safety assembly for pressure-maintaining coring Download PDF

Info

Publication number
CN105041252A
CN105041252A CN201510460275.8A CN201510460275A CN105041252A CN 105041252 A CN105041252 A CN 105041252A CN 201510460275 A CN201510460275 A CN 201510460275A CN 105041252 A CN105041252 A CN 105041252A
Authority
CN
China
Prior art keywords
piston
axis
internally
pressure
piston shaft
Prior art date
Application number
CN201510460275.8A
Other languages
Chinese (zh)
Inventor
罗军
杨立文
孙文涛
王光玥
张国丽
王浩地
许平平
李鹏
王子臣
Original Assignee
中国石油集团长城钻探工程有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中国石油集团长城钻探工程有限公司 filed Critical 中国石油集团长城钻探工程有限公司
Priority to CN201510460275.8A priority Critical patent/CN105041252A/en
Publication of CN105041252A publication Critical patent/CN105041252A/en

Links

Abstract

The invention relates to the technical field of petroleum and natural gas well-drilling coring, in particular to an internally-lifting safety assembly for pressure-maintaining coring. The outer wall of the lower end of a safety male joint of the internally-lifting safety assembly is in threaded connection with a safety female joint while the inner wall of the same is in threaded connection with a piston shaft, a ball seat is arranged on the inner wall of the bottom end of the piston shaft, a piston sleeve is mounted on the outer side of the piston shaft in a sleeving manner, an outer step of the bottom end of the piston shaft and the inner wall of the piston sleeve are sealed, an annular space is formed between the piston shaft and the piston sleeve, the piston sleeve can move up and down along the piston shaft, a pressure relief hole capable of being communicated with the annular space between the piston shaft and the piston sleeve is formed in the side wall of the lower end of the piston shaft, a diversion hole is formed in the side wall of the piston sleeve, and the lower end of the piston sleeve is in threaded connection with an adapter. By the internally-lifting safety assembly, a pressure-maintaining coring inner barrel is enabled to move upwards relative to an outer barrel through a hydraulic internally-lifting function, so that closing of a ball valve is realized. The internally-lifting safety assembly is high in safety, high in resistance to tension and torsion, simple in structure and easy to use in tool assembling and maintaining.

Description

A kind of coring drilling with keep up pressure safe assembly of interior lifting
Technical field:
The present invention relates to oil and gas drilling and coring delivery technical field, particularly a kind of coring drilling with keep up pressure safe assembly of interior lifting.
Background technology:
Coring drilling with keep up pressure be a kind of rock core can be made to remain at stratum reset pressure state under coring method.There is a ball valve coring drilling with keep up pressure instrument inner core lower end, and closed the ball valve of inner core lower end by mechanical action, mechanism general is at present employing six side differential attachment.Its positioning action and difficult in maintenance, and when well depth, its tension torsional property is poor, is difficult to the construction demand meeting deep-well.
Summary of the invention:
The technical problem to be solved in the present invention is to provide the safe assembly of the interior lifting of a kind of coring drilling with keep up pressure, the arrangement achieves and by enhanced feature in hydraulic pressure, the relative urceolus of coring drilling with keep up pressure inner core is moved up, thus realize the closedown of ball valve, security performance is high, tension anti-twisting property is strong, structure is simple, and tool assemble and maintenance are easily.Overcome existing coring drilling with keep up pressure tool positioned operation and maintenance difficulty, the deficiency of tension torsional property difference.
The technical solution used in the present invention is: a kind of coring drilling with keep up pressure safe assembly of interior lifting, comprises safe male joint and security master joint, safe male joint lower end outer wall is threaded security master joint, safe male joint lower end inner wall is threaded the axis of the piston, the axis of the piston bottom inwall is provided with ball seat, piston bush is sleeved on outside the axis of the piston, the axis of the piston bottom outer step and piston bush inner wall sealing, annular space is formed between the axis of the piston and piston bush, piston bush can move up and down along the axis of the piston, the axis of the piston lower end sidewall has the relief hole that can be connected with annular space between the axis of the piston and piston bush, piston bush sidewall has tap hole, piston bush lower end is threaded crossover sub, crossover sub lower end is threaded and adjusts major axis and locked by safetied pin.
The invention has the beneficial effects as follows: the present invention makes the relative urceolus of coring drilling with keep up pressure inner core move up by enhanced feature in hydraulic pressure, thus realizes the closedown of ball valve, and security performance is high, tension anti-twisting property is strong, and structure is simple, and tool assemble and maintenance are easily.
Accompanying drawing illustrates:
Below in conjunction with the drawings and specific embodiments, the present invention will be further described in detail.
Fig. 1 is structural representation of the present invention.
Detailed description of the invention:
As shown in Figure 1, a kind of coring drilling with keep up pressure safe assembly of interior lifting, comprises safe male joint 1 and security master joint 2, safe male joint 1 lower end outer wall is threaded security master joint 2, safe male joint 1 lower end inner wall is threaded the axis of the piston 3, the axis of the piston 3 bottom inwall is provided with ball seat, piston bush 4 is sleeved on outside the axis of the piston 3, the axis of the piston 3 bottom outer step and piston bush 4 inner wall sealing, annular space is formed between the axis of the piston 3 and piston bush 4, piston bush 4 can move up and down along the axis of the piston 3, the axis of the piston 3 lower end sidewall has the relief hole that can be connected with annular space between the axis of the piston 3 and piston bush 4, piston bush 4 sidewall has tap hole, piston bush 4 lower end is threaded crossover sub 5, crossover sub 5 lower end is threaded and adjusts major axis 7 and locked by safetied pin 6.
During use, security master joint 2 connects the urceolus of coring of lower end, adjusts major axis 7 to connect bottom coring inner drum assembly.The present invention in an assembling process, is regulated the gap between inner/outer tube by tune major axis 7, and is locked by safetied pin 6.In drilling process, drilling fluid is flowed in piston bush 4 by the center flow channels of safe male joint 1, the axis of the piston 3, and piston bush 4 has tap hole, drilling fluid is diverted to the circulation realizing drilling fluid outside piston bush 4.After drilling and coring delivery completes, in drilling tool, drop into a steel ball sets on the ball seat of the axis of the piston 3 bottom, drilling fluid is delivered to annular space between the axis of the piston 3 and piston bush 4 by the relief hole on the axis of the piston 3, drilling liquid pressure promotes piston bush 4 and moves up along the axis of the piston 3, inner core assembly is pulled to move relative to urceolus and close pressure keeping ball valve assembly, after moving to assigned address, the tap hole of piston bush 4 aligns with the relief hole of the axis of the piston 3, drilling fluid in the axis of the piston 3 will flow to outside piston bush 4, pressure drop, whole process completes.
The interior hydraulic pressure lift of patent of the present invention, the relative urceolus of coring inner drum moves upward and drives ball valve to close, and drilling tool does not need to carry in advance, reduces dropping of loose crushing rock core, the sand card that simultaneously, lift structure prevents landwaste to cause six sides, dependable performance.
Be understandable that, above about specific descriptions of the present invention, the technical scheme described by the embodiment of the present invention is only not limited to for illustration of the present invention, those of ordinary skill in the art is to be understood that, still can modify to the present invention or equivalent replacement, to reach identical technique effect; Needs are used, all within protection scope of the present invention as long as meet.

Claims (1)

1. the coring drilling with keep up pressure safe assembly of interior lifting, comprises safe male joint (1) and security master joint (2), it is characterized in that: safe male joint (1) lower end outer wall is threaded security master joint (2), safe male joint (1) lower end inner wall is threaded the axis of the piston (3), the axis of the piston (3) bottom inwall is provided with ball seat, piston bush (4) is sleeved on the axis of the piston (3) outside, the axis of the piston (3) bottom outer step and piston bush (4) inner wall sealing, annular space is formed between the axis of the piston (3) and piston bush (4), piston bush (4) can move up and down along the axis of the piston (3), the axis of the piston (3) lower end sidewall has the relief hole that can be connected with annular space between the axis of the piston (3) and piston bush (4), piston bush (4) sidewall has tap hole, piston bush (4) lower end is threaded crossover sub (5), crossover sub (5) lower end is threaded and adjusts major axis (7) and locked by safetied pin (6).
CN201510460275.8A 2015-07-30 2015-07-30 Internally-lifting safety assembly for pressure-maintaining coring CN105041252A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510460275.8A CN105041252A (en) 2015-07-30 2015-07-30 Internally-lifting safety assembly for pressure-maintaining coring

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510460275.8A CN105041252A (en) 2015-07-30 2015-07-30 Internally-lifting safety assembly for pressure-maintaining coring

Publications (1)

Publication Number Publication Date
CN105041252A true CN105041252A (en) 2015-11-11

Family

ID=54448175

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201510460275.8A CN105041252A (en) 2015-07-30 2015-07-30 Internally-lifting safety assembly for pressure-maintaining coring

Country Status (1)

Country Link
CN (1) CN105041252A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952405A (en) * 2016-06-30 2016-09-21 中国石油集团西部钻探工程有限公司 Floating piston device for coring
CN106014314A (en) * 2016-07-05 2016-10-12 中交第四航务工程勘察设计院有限公司 Hydraulic rock core lifting device for exploratory boring
CN106014315B (en) * 2016-07-18 2019-02-01 中国石油集团西部钻探工程有限公司 Hydraulic lock compact form coring apparatus
CN110552644A (en) * 2019-10-05 2019-12-10 中国石油大学(华东) In-situ coal rock heat-preservation pressure-maintaining coring device and application method

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467867A (en) * 1982-07-06 1984-08-28 Baker Oil Tools, Inc. Subterranean well safety valve with reference pressure chamber
CN2402798Y (en) * 1999-12-13 2000-10-25 胜利石油管理局钻井工艺研究院 Shape-retaining seal coring tool
CN2464928Y (en) * 2000-08-29 2001-12-12 辽河石油勘探局工程技术研究院 Pressured coring tool in soft ground
CN2558757Y (en) * 2002-06-18 2003-07-02 大庆石油管理局 Pressure compensator of pressure maintaining seal coring tool
CN101037859A (en) * 2006-03-13 2007-09-19 中交第三航务工程勘察设计院有限公司 Double-tubes single-action valve type coring earth borrowing device
CN201474639U (en) * 2009-07-14 2010-05-19 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 Hydraulic active hermetic core taking tool
CN201581839U (en) * 2009-11-17 2010-09-15 中国石油集团长城钻探工程有限公司 Sealed coring tool
CN104179469A (en) * 2014-08-07 2014-12-03 中国海洋石油总公司 Active pressure maintaining and coring tool and use method thereof

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4467867A (en) * 1982-07-06 1984-08-28 Baker Oil Tools, Inc. Subterranean well safety valve with reference pressure chamber
CN2402798Y (en) * 1999-12-13 2000-10-25 胜利石油管理局钻井工艺研究院 Shape-retaining seal coring tool
CN2464928Y (en) * 2000-08-29 2001-12-12 辽河石油勘探局工程技术研究院 Pressured coring tool in soft ground
CN2558757Y (en) * 2002-06-18 2003-07-02 大庆石油管理局 Pressure compensator of pressure maintaining seal coring tool
CN101037859A (en) * 2006-03-13 2007-09-19 中交第三航务工程勘察设计院有限公司 Double-tubes single-action valve type coring earth borrowing device
CN201474639U (en) * 2009-07-14 2010-05-19 中国石油集团西部钻探工程有限公司克拉玛依钻井工艺研究院 Hydraulic active hermetic core taking tool
CN201581839U (en) * 2009-11-17 2010-09-15 中国石油集团长城钻探工程有限公司 Sealed coring tool
CN104179469A (en) * 2014-08-07 2014-12-03 中国海洋石油总公司 Active pressure maintaining and coring tool and use method thereof

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105952405A (en) * 2016-06-30 2016-09-21 中国石油集团西部钻探工程有限公司 Floating piston device for coring
CN105952405B (en) * 2016-06-30 2018-06-26 中国石油集团西部钻探工程有限公司 It cores and uses float piston device
CN106014314A (en) * 2016-07-05 2016-10-12 中交第四航务工程勘察设计院有限公司 Hydraulic rock core lifting device for exploratory boring
CN106014314B (en) * 2016-07-05 2018-11-20 中交第四航务工程勘察设计院有限公司 A kind of drill takes device with hydraulic rock core card
CN106014315B (en) * 2016-07-18 2019-02-01 中国石油集团西部钻探工程有限公司 Hydraulic lock compact form coring apparatus
CN110552644A (en) * 2019-10-05 2019-12-10 中国石油大学(华东) In-situ coal rock heat-preservation pressure-maintaining coring device and application method

Similar Documents

Publication Publication Date Title
US9133689B2 (en) Sleeve valve
CN105952418B (en) It is a kind of for reservoir reconstruction, production monitoring and the Intellectual valve of control and its construction method
CN201386539Y (en) Fracture used high-pressure sand blast sliding sleeve
CN202731865U (en) Switchable fracturing sliding sleeve
CN102337862B (en) Variable-diameter fracturing valve
CN102979495B (en) Many bunches of Limited entry fracturing tubing strings of open-hole horizontal well and fracturing process thereof
CN103339344B (en) Setting tool
CN104755695B (en) Method for the underground adapter assembly of flow control and for completing pit shaft
CN201513157U (en) Inverse well-flushing double seal check valve
CN103775015A (en) Downhole expansion tool for sleeve and method for using downhole expansion tool for sleeve to expand sleeve
CN101942962A (en) Well drilling method of through tubing of gas lift under-balanced coiled tubing
CN104405321B (en) The pressure of the drill is pushed away plus device
CN202047789U (en) Reservoir isolating valve
US20100206568A1 (en) Devices, Systems and Methods for Equalizing Pressure in a Gas Well
CN204532234U (en) Sliding sleeve of bushing and waterpower bridging plug combined type completion tubular column
CN103899250A (en) Device for improving oil and gas well drilling speed
CN103821477A (en) Self-balancing downhole safety valve
CN102071900B (en) Custom-pressure expandable naked eye packer
CN204252969U (en) Sand control pipe and flow string
CN202560158U (en) Drillable combined bridge plug
CN103046896A (en) Fracturing bridge plug
CN202745795U (en) Hydraulic sealing and de-sealing high-pressure packer
CN102828716B (en) Sealed type hydraulic driving adjustable speed cutter of oil pipe string with diameter being phi 73mm or greater
CN205382923U (en) Packing sand control technology tubular column is segmented to circulate by horizontal well outside of tubes
CN103397863B (en) Double acting compression packer and using method thereof

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20151111

WD01 Invention patent application deemed withdrawn after publication