CN106481299A - A kind of subsidy expansion tube hangs sealing structure - Google Patents

A kind of subsidy expansion tube hangs sealing structure Download PDF

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Publication number
CN106481299A
CN106481299A CN201611123684.XA CN201611123684A CN106481299A CN 106481299 A CN106481299 A CN 106481299A CN 201611123684 A CN201611123684 A CN 201611123684A CN 106481299 A CN106481299 A CN 106481299A
Authority
CN
China
Prior art keywords
sealing
expansion tube
subsidy
suspension
expansion
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
CN201611123684.XA
Other languages
Chinese (zh)
Inventor
吕能
李德君
武刚
刘强
白强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi`an Sanhuan Science & Technology Development Corp
Original Assignee
Xi`an Sanhuan Science & Technology Development Corp
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 Xi`an Sanhuan Science & Technology Development Corp filed Critical Xi`an Sanhuan Science & Technology Development Corp
Priority to CN201611123684.XA priority Critical patent/CN106481299A/en
Publication of CN106481299A publication Critical patent/CN106481299A/en
Pending legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH DRILLING; MINING
    • E21BEARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B33/00Sealing or packing boreholes or wells
    • E21B33/02Surface sealing or packing
    • E21B33/03Well heads; Setting-up thereof
    • E21B33/04Casing heads; Suspending casings or tubings in well heads

Abstract

The invention belongs to production of hydrocarbons technical field, more particularly, to a kind of be applied to temperature and be not higher than the subsidy expansion tube of 100 degrees Celsius of operating modes hang sealing structure, in order to solve, sealing property in prior art is not good, hang hypodynamic defect.Including multiple be attached on expansion tube hang sealing units and the expansion cone that are arranged on expansion tube one end, described suspension sealing unit includes primary suspension device and main sealing device, described primary suspension device and main sealing device be shaped as tubular.The technical program can overcome the impact to suspension force and sealing property for the actual subsidy internal surface of sleeve pipe physical dimension deviation, reduce the sensitivity coefficient to sealing property and suspension force for the physical dimension deviation, realize suspension force and sealing property meets design requirement.The present invention adopts sulfuration process simultaneously, is attached to hanging sealing structure on expansion tube, it is easy to accomplish the assembly line work of product.

Description

A kind of subsidy expansion tube hangs sealing structure
Technical field
The invention belongs to production of hydrocarbons technical field, more particularly, to one kind are applied to temperature is not higher than 100 degrees Celsius of operating modes Subsidy expansion tube hang sealing structure.
Background technology
Subsidy bulged tube technology is exactly by expansion tube lower going-into-well bottom, makes pipe with expansion cone with the method for fluid power or mechanical force Material permanent deformation so that the expandable tubular entering under new the leak rupturing the pipes such as sleeve pipe, etch pit pipe is realized repairing or Permanent seal, the expansion tube after subsidy will be close to impaired internal surface of sleeve pipe.
Subsidy expansion tube suspended structure is at expanding between pipe outer wall and outer layer sleeve inwall, mainly has in construction Two aspect effects, are can to produce sufficiently large frictional force it is ensured that work progress can be smoothed out on one side, and were constructing The weight of subsidy tubing string can be hung afterwards;It is that suspension seal modules at damaged sleeve pipe hole two ends can have enough on the other hand Sealing normal pressure, the pressure reduction inside and outside tubing string can be sealed, it is to avoid reveal.
The single hardness thin-walled rubber ring adopting at present, during subsidy construction, very sensitive to the physical dimension of steel pipe, The groove defect of particularly expansion tube ovality and required subsidy internal surface of sleeve pipe;Ovality directly affects suspension sealing structure with outward The effective contact area of layer internal surface of sleeve pipe, rubs in fixation and examines under coefficient and equal normal pressure, greatly reduce suspension force, and oval The contact of degree is uneven, causes to seal uneven, not reaching or contact little place becomes leakage path, and causing can not be close The problems such as envelope, suspension force deficiency.
Content of the invention
The technical problem to be solved is:A kind of subsidy expansion tube is provided to hang sealing structure, in order to solve In prior art, sealing property is not good, hang hypodynamic defect.
For solving above-mentioned technical problem, the technical solution of the present invention is as follows:A kind of subsidy hangs sealing with expansion tube Structure, it is characterized in that:Including multiple suspension sealing units being attached on expansion tube and be arranged on expansion tube one end Expansion cone, described suspension sealing unit includes primary suspension device and main sealing device, described primary suspension device and primary seal dress That puts is shaped as tubular.
Hanging sealing unit described in above-mentioned technical solution can adopt sulfuration process between employing etc. on expansion tube Away from arrangement, preferred quantity is 2-4, and adjacent suspension sealing unit center dot spacing is 2000mm-3000mm;Described expansion tube Upper end is away from adjacent suspension sealing unit edge 50mm-80mm.
Layout is covered, based on layout type between primary suspension device described in above-mentioned technical solution and main sealing device employing Suspension arrangement-main sealing device-primary suspension device, primary suspension device and main sealing device Distances Between Neighboring Edge Points 40mm-60mm.
The material of primary suspension device described in above-mentioned technical solution is nitrile rubber, and Shore A hardness is 80 90, wide Spend for 50mm-70mm, thickness is 2.5mm-3.5mm;The material of described main sealing device is nitrile rubber, and Shore A hardness is 50 60, width is 40mm-60mm, and thickness is 3.5mm-4.5mm.
The invention has the beneficial effects as follows:The present invention by the functional realiey mode of primary seal and main suspension separately, can be using not Stack pile, different hardness, the nitrile rubber of different in width.The module that hardness is little, fillibility is good is made to realize primary seal function;Make hard Degree is big, and the big module of intensity realizes main hanging function.Therefore, the technical program can overcome actual subsidy internal surface of sleeve pipe dimensioning The impact to suspension force and sealing property for the very little deviation, reduces the sensitivity coefficient to sealing property and suspension force for the physical dimension deviation, Realize suspension force and sealing property meets design requirement.The present invention adopts sulfuration process simultaneously, is attached to hanging sealing structure On expansion tube, it is easy to accomplish the assembly line work of product.
Brief description
Fig. 1 is embodiment of the present invention structural representation;
Fig. 2 is schematic diagram after embodiment of the present invention construction subsidy;
In figure:1- hangs sealing unit, 2- primary suspension device, 3- main sealing device, 4- expansion tube, and 5- expansion cone, outside 6- Layer sleeve pipe, 7- outer layer sleeve damaged part.
Specific embodiment
With reference to specific embodiments and the drawings, the present invention is described in detail.
Embodiment provides a kind of subsidy expansion tube and hangs sealing structure, hangs sealing structure and hangs sealing list by 2 Unit's composition, hanging sealing unit center dot spacing is 2000mm.Hang sealing unit by 2 primary suspension devices and 1 primary seal Device forms, and covers layout, layout type is primary suspension device-main sealing device-primary suspension device, by sulfuration process between adopting It is attached on expansion tube.Primary suspension device and main sealing device Distances Between Neighboring Edge Points are 60mm;Hang sealing unit edge far from expansion tube Upper end distance is 80mm.The material of primary suspension device is nitrile rubber, and Shore A hardness is 89, and width is 50mm, and thickness is 3.0mm;The material of main sealing device is nitrile rubber, and Shore A hardness is 52, and width is 50mm, and thickness is 3.5mm.
Work process:Expansion tube is through arriving down-hole outer layer sleeve damaged part under drilling rod or oil pipe, first solid by oil pipe or drilling rod Determine holding position constant, expansion cone, under mechanical force or hydraulic coupling drive, moves from bottom to top, make expansion tube occur forever to mould Property deformation, the expansion pipe outer wall after increase by hang sealing structure crimp be close on outer layer sleeve, realize hang and Sealing function.
Under the expansion cone that suspension sealing structure is 15% in expansion rate acts on, can achieve big suspension force and high sealing:Applying After work expands, primary suspension device, its wall thickness reduction 17%, realizes suspension force 291kN;Main sealing device, its wall thickness reduction Rate 23%, realizes sealing normal pressure 18.5MPa.

Claims (5)

1. a kind of subsidy with expansion tube hang sealing structure it is characterised in that:Close including multiple suspensions being attached on expansion tube Envelope unit and the expansion cone being arranged on expansion tube one end, described suspension sealing unit includes primary suspension device and primary seal dress Put, described primary suspension device and main sealing device be shaped as tubular.
2. subsidy according to claim 1 with expansion tube hang sealing structure it is characterised in that:Described suspension sealing unit Using sulfuration process on expansion tube using being equally spaced, quantity is 2-4, and adjacent suspension sealing unit center dot spacing is 2000mm-3000mm;Described expansion tube upper end is away from adjacent suspension sealing unit edge 50mm-80mm.
3. subsidy according to claim 2 with expansion tube hang sealing structure it is characterised in that:Described primary suspension device and Main sealing device covers layout between adopting, and layout type is primary suspension device-main sealing device-primary suspension device, primary suspension device With main sealing device Distances Between Neighboring Edge Points 40mm-60mm.
4. subsidy according to claim 3 with expansion tube hang sealing structure it is characterised in that:Described primary suspension device Material is nitrile rubber, and Shore A hardness is 80 90, and width is 50mm-70mm, and thickness is 2.5mm-3.5mm;Described primary seal The material of device is nitrile rubber, and Shore A hardness is 50 60, and width is 40mm-60mm, and thickness is 3.5mm-4.5mm.
5. subsidy according to claim 4 with expansion tube hang sealing structure it is characterised in that:The expansion of described expansion cone Rate is 15%.
CN201611123684.XA 2016-12-08 2016-12-08 A kind of subsidy expansion tube hangs sealing structure Pending CN106481299A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201611123684.XA CN106481299A (en) 2016-12-08 2016-12-08 A kind of subsidy expansion tube hangs sealing structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201611123684.XA CN106481299A (en) 2016-12-08 2016-12-08 A kind of subsidy expansion tube hangs sealing structure

Publications (1)

Publication Number Publication Date
CN106481299A true CN106481299A (en) 2017-03-08

Family

ID=58276003

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201611123684.XA Pending CN106481299A (en) 2016-12-08 2016-12-08 A kind of subsidy expansion tube hangs sealing structure

Country Status (1)

Country Link
CN (1) CN106481299A (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001004535A1 (en) * 1999-07-09 2001-01-18 Enventure Global Technology Two-step radial expansion
CN202300265U (en) * 2011-10-31 2012-07-04 中国石油化工股份有限公司 Double-bellmouth type expandable casing packer tool
CN202417366U (en) * 2011-12-26 2012-09-05 中国石油集团长城钻探工程有限公司 Anchoring and sitting hanging device of expansion restoration pipe embedded with slip sleeves
CN204402383U (en) * 2015-01-08 2015-06-17 中国石油大学(华东) A kind of expandable liner hanger joint carrying based on metal-rubber and seal
CN205805473U (en) * 2016-07-01 2016-12-14 中国海洋石油总公司 A kind of expansion pipe structure for the outside seal modules of righting and protection
CN206376801U (en) * 2016-12-08 2017-08-04 西安三环科技开发总公司 A kind of subsidy hangs sealing structure with expansion tube

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001004535A1 (en) * 1999-07-09 2001-01-18 Enventure Global Technology Two-step radial expansion
CN202300265U (en) * 2011-10-31 2012-07-04 中国石油化工股份有限公司 Double-bellmouth type expandable casing packer tool
CN202417366U (en) * 2011-12-26 2012-09-05 中国石油集团长城钻探工程有限公司 Anchoring and sitting hanging device of expansion restoration pipe embedded with slip sleeves
CN204402383U (en) * 2015-01-08 2015-06-17 中国石油大学(华东) A kind of expandable liner hanger joint carrying based on metal-rubber and seal
CN205805473U (en) * 2016-07-01 2016-12-14 中国海洋石油总公司 A kind of expansion pipe structure for the outside seal modules of righting and protection
CN206376801U (en) * 2016-12-08 2017-08-04 西安三环科技开发总公司 A kind of subsidy hangs sealing structure with expansion tube

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Application publication date: 20170308

WD01 Invention patent application deemed withdrawn after publication