EP3170964A1 - Selbstverriegelnde bohrlochverrohrungszentriervorrichtung mit unterirdischer öffnung - Google Patents

Selbstverriegelnde bohrlochverrohrungszentriervorrichtung mit unterirdischer öffnung Download PDF

Info

Publication number
EP3170964A1
EP3170964A1 EP15821386.8A EP15821386A EP3170964A1 EP 3170964 A1 EP3170964 A1 EP 3170964A1 EP 15821386 A EP15821386 A EP 15821386A EP 3170964 A1 EP3170964 A1 EP 3170964A1
Authority
EP
European Patent Office
Prior art keywords
stage
support
self
locking
stage support
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.)
Withdrawn
Application number
EP15821386.8A
Other languages
English (en)
French (fr)
Other versions
EP3170964A4 (de
Inventor
Qinghua Xia
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.)
Daqing First Technology Development Ltd Co
Original Assignee
Daqing First Technology Development Ltd Co
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 Daqing First Technology Development Ltd Co filed Critical Daqing First Technology Development Ltd Co
Publication of EP3170964A1 publication Critical patent/EP3170964A1/de
Publication of EP3170964A4 publication Critical patent/EP3170964A4/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
    • E21B17/1014—Flexible or expansible centering means, e.g. with pistons pressing against the wall of the well

Definitions

  • the invention relates to a centralizer capable of centrally fixing a casing in a borehole.
  • Rigid centralizers are further divided into semi-rigid centralizers, spiral rigid centralizers and roller type rigid centralizers.
  • the rigid centralizers have advantages of large support force and small starting force or displacement force so that casings can run smoothly and keep at a high centrality.
  • the rigid centralizers have disadvantages of high requirements for boreholes so that any undergauged interval cannot exist.
  • the rigid centralizers will increase the string rigidity, resulting in difficulty in casing running, and the consumption of rigid centralizers is limited due to high manufacturing cost, complicated manufacturing process and unstable reliability.
  • Another downhole-started elastic centralizer is available. Although the centralizer has centralizing effect in borehole by sufficient restoring force generated by a bow spring leaf opened by differential pressure, the starting pressure thereof is difficult to control, and the maximum starting force is large, thus the centralizer is rarely used.
  • the purpose of the invention is to provide a downhole-started casing centralizer with small starting force.
  • the technical solution of the invention is to provide a downhole-started self-locking casing centralizer, comprising a connecting part (1) and a connecting part (2) on both ends, a central supporting part being arranged between the connecting part (1) and the connecting part (2), and characterized in that the central supporting part comprises a hollow coupler, and at least three N-stage piston self-locking support devices extending by stages under pressure are evenly distributed along the circumference of the coupler, N ⁇ 2; each N-stage piston self-locking support device comprises a support shell fixed to the coupler and a N-stage support consisting of a first stage support through an N th stage support, the first stage support and the support shell are in a sliding fit, the first stage support through the N th stage support are in a sliding fit successively by two adjacent stages so that the N-stage support can extend by stages under pressure from the N th stage support, a supporting part for contacting with wall supports is arranged at the end where the N th stage support goes against the support shell, fracture rings are
  • the fracture ring of the current support and the inner wall of an adjacent support are in an interference fit, and the fracture ring of the first stage support and the inner wall of the support shell are in an interference fit.
  • each of the N-stage piston self-locking support device two adjacent supports as well as the first stage support and the support shell are sealed respectively by a sealing ring.
  • both the connecting part (1) and the connecting part (2) are of casing-connected thread structures.
  • the contact part between the supporting part and the wall supports is a half-arc support contact cap.
  • a downhole-started self-locking casing centralizer provided by the invention comprises a connecting part (1) and a connecting part (2) on both ends, a central supporting part (3) is arranged between the connecting part (1) and the connecting part (2), the connecting part (1) and the connecting part (2) are of casing-connected thread structures, the connecting part (1) uses LTC PIN thread, and the connecting part (2) uses LTC BOX thread.
  • the downhole-started self-locking casing centralizer of the invention is in threaded connection with a casing, replacing couplings and exerting connection function, thus avoiding the problem that an elastic centralizer cannot control the downhole location as the elastic centralizer is sheathed outside a pipe string, and also avoiding the problem of difficulty in casing running as a rigid centralizer increases the string rigidity.
  • replacement of couplings helps save the production cost, and the centralization position is relatively fixed, thus casing running operation is convenient and reliable.
  • the dimensions of connected casings are 41/2" to 51/2".
  • a central supporting part (3) comprises a hollow coupler (5), and at least three N-stage piston self-locking support devices extending by stages under pressure are evenly distributed along the circumference of the coupler (5), N ⁇ 2.
  • N the number of stages under pressure
  • Each 3-stage piston self-locking support device comprises a support shell (4-1) fixed to the coupler (5) and a 3-stage support consisting of a first stage support (4-2) through a third stage support (4-4), a starting orifice (4-10) communicated with the support shell (4-1) and the 3-stage support is arranged on the coupler (5). Fluid pressure enters from the starting orifice (4-10) to the support shell (4-1) and the 3-stage support, and then the 3-stage support extends by stages under the pressure. After three 3-stage supports are extended in place, the casing is centrally fixed and supported in the borehole.
  • the first stage support (4-2) is nested in the support shell (4-1) and in sliding fit with the support shell (4-1)
  • the second stage support (4-3) is nested in the first stage support (4-2) and in sliding fit with the first stage support (4-2)
  • the third stage support (4-4) is nested in the second stage support (4-3) and in sliding fit with the second stage support (4-3).
  • a first stage sealing ring (4-9-1), a second stage sealing ring (4-9-2) and a third stage sealing ring (4-9-3) are respectively arranged between the first stage support (4-2) and the support shell (4-1), between the second stage support (4-3) and the first stage support (4-2) as well as between the third stage support (4-4) and the second stage support (4-3).
  • a first stage fracture ring (4-6-1), a second stage fracture ring (4-6-2) and a third stage fracture ring (4-6-3) are respectively arranged at the bottoms of the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4), the first stage fracture ring (4-6-1) and the inner wall of the support shell (4-1) are in interference fit, the second stage fracture ring (4-6-2) and the inner wall of the first stage fracture ring (4-6-1) are in interference fit, and the third stage fracture ring (4-6-3) and the inner wall of the second stage fracture ring (4-6-2) are in interference fit.
  • three 3-stage piston self-locking support devices are evenly distributed along the circumference. Each device holds a 3-stage support capable of being extended by three stages.
  • the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4) of the 3-stage support have different starting forces due to different sectional areas.
  • the third stage support (4-4) is first started, then the second stage support (4-3) is started after the third stage support (4-4) is moved in place, and the first stage support (4-2) is started after the second stage support (4-3) is moved in place.
  • the first stage fracture ring (4-6-1), the second stage fracture ring (4-6-2) and the third stage fracture ring (4-6-3) are respectively arranged at the bottoms of the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4), the fracture rings have different fracture starting pressures in a fracture sequence from the third stage fracture ring (4-6-3), through the second stage fracture ring (4-6-2) to the first stage fracture ring (4-6-1).
  • P3 2P2
  • P2 and P1 represent the starting pressure of the third stage fracture ring (4-6-3), the second stage fracture ring (4-6-2) and the first stage fracture ring (4-6-1) respectively).
  • the 3-stage support device has the advantage of low starting pressure.
  • the minimum reset force is larger than 3000N during starting, and after each stage is started, each stage will generate a corresponding reset force, and after the three stages are started, the maximum reset force will go far beyond the weight of the pipe string, thus the centralization performance is highly reliable.
  • ratchet-shaped locating slots i.e., a first stage ratchet-shaped locating slot (4-7-1), a second stage ratchet-shaped locating slot (4-7-2) and a third stage ratchet-shaped locating slot (4-7-3), successively from top to bottom are respectively arranged on the outer circumferential surfaces of the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4).
  • a first stage C-shaped locating self-locking ring (4-8-1), a second stage C-shaped locating self-locking ring (4-8-2) and a third stage C-shaped locating self-locking ring (4-8-3) are respectively arranged on the inner walls of the support shell (4-1), the first stage support (4-2) and the second stage support (4-3).
  • the first stage C-shaped locating self-locking ring (4-8-1), the second stage C-shaped locating self-locking ring (4-8-2) and the third stage C-shaped locating self-locking ring (4-8-3) are respectively fitted with the first stage ratchet-shaped locating slot (4-7-1), the second stage ratchet-shaped locating slot (4-7-2) and the third stage ratchet-shaped locating slot (4-7-3).
  • the first stage ratchet-shaped locating slot (4-7-1), the second stage ratchet-shaped locating slot (4-7-2) and the third stage ratchet-shaped locating slot (4-7-3) on the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4) will be locked with the first stage C-shaped locating self-locking ring (4-8-1), the second stage C-shaped locating self-locking ring (4-8-2) and the third stage C-shaped locating self-locking ring (4-8-3).
  • Three ratchet-shaped locating slots i.e., a first stage ratchet-shaped locating slot (4-7-1), a second stage ratchet-shaped locating slot (4-7-2) and a third stage ratchet-shaped locating slot (4-7-3), are respectively arranged on the surfaces of the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4) so that the first stage support (4-2), the second stage support (4-3) and the third stage support (4-4) can be fixed at any extended position and applied to different boreholes.
  • the resultant reset force is constant, and will not change under external forces.
  • the maximum reset force depends on shear strength of the first stage C-shaped locating self-locking ring (4-8-1), the second stage C-shaped locating self-locking ring (4-8-2) and the third stage C-shaped locating self-locking ring (4-8-3), thus the maximum reset force is much higher than the weight of the pipe string.
  • the structural form is not currently present in existing centralizers.
  • a supporting part (4-5) for contacting with wall supports is arranged at an end of each third stage support (4-4), the contact part between the supporting part (4-5) and the wall supports is a half-arc support contact cap (4-5-1).
  • the contact area between supporting points of the centralizer and borehole walls is the key to accurate centralization of the pipe string.
  • the contact area is too small, unit pressure per unit area of the supporting points is large, thus the borehole walls will be damaged and the pipe string cannot be well centralized.
  • the area of the supporting points is large, supporting force on unit area is small, thus the pipe string can be effectively supported for centralization, and damage to the borehole walls will be reduced.
  • the half-arc support and cap support contact form is adopted, so that the support form changes from point contact to surface contact, thus effectively reducing pressure per unit area of the borehole walls while keeping centralization supporting strength for the pipe string unchanged, effectively reducing supporting damage to the borehole, and ensuring casing centralization in the borehole.
  • the centralizer provided by the invention is started by downhole pressure. After the casing arrives at the designated downhole position, pressure in the casing will control the supports to be started to centralize the casing. This starting and support approach will not result in damage to the borehole, and is applied to different boreholes, thus reducing requirements for boreholes, and greatly expanding the scope of application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP15821386.8A 2014-07-16 2015-07-14 Selbstverriegelnde bohrlochverrohrungszentriervorrichtung mit unterirdischer öffnung Withdrawn EP3170964A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201410337155.4A CN104234647B (zh) 2014-07-16 2014-07-16 一种井下开启自锁式套管居中装置
PCT/CN2015/083917 WO2016008400A1 (zh) 2014-07-16 2015-07-14 一种井下开启自锁式套管居中装置

Publications (2)

Publication Number Publication Date
EP3170964A1 true EP3170964A1 (de) 2017-05-24
EP3170964A4 EP3170964A4 (de) 2017-09-20

Family

ID=52223454

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15821386.8A Withdrawn EP3170964A4 (de) 2014-07-16 2015-07-14 Selbstverriegelnde bohrlochverrohrungszentriervorrichtung mit unterirdischer öffnung

Country Status (5)

Country Link
US (1) US20160215574A1 (de)
EP (1) EP3170964A4 (de)
CN (1) CN104234647B (de)
SG (1) SG11201601868RA (de)
WO (1) WO2016008400A1 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104234647B (zh) * 2014-07-16 2017-02-08 大庆福斯特科技开发有限公司 一种井下开启自锁式套管居中装置
CN106089133B (zh) * 2016-08-09 2018-05-18 天津市泓金泰特种机械有限公司 一种石油管线对中装置
CN108316865B (zh) * 2018-03-01 2019-05-10 中国矿业大学(北京) 铆钉固定式表层套管
CN109826662B (zh) * 2019-01-25 2021-08-06 河北工程大学 一种采矿用通风装置
CN111878022B (zh) * 2020-08-05 2022-05-27 吕梁学院 一种水平井下取芯用扩孔辅助稳固装置
CN112253009A (zh) * 2020-12-09 2021-01-22 中国石油天然气集团有限公司 连续油管滚轮减阻器
CN117605428B (zh) * 2024-01-22 2024-04-09 黑龙江省第二地质勘查院 一种具有固定功能的地质物探测井仪用扶正装置

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3390724A (en) * 1966-02-01 1968-07-02 Zanal Corp Of Alberta Ltd Duct forming device with a filter
CA1098894A (en) * 1979-07-19 1981-04-07 Inco Limited Non-rotating spring loaded stabilizer
US4776397A (en) * 1986-10-06 1988-10-11 Ava International Corporation Tool for lowering into centered position within a well bore
US5228518A (en) * 1991-09-16 1993-07-20 Conoco Inc. Downhole activated process and apparatus for centralizing pipe in a wellbore
CN2391002Y (zh) * 1999-09-13 2000-08-09 张洪才 自锁式油管扶正器
US7422069B2 (en) * 2002-10-25 2008-09-09 Baker Hughes Incorporated Telescoping centralizers for expandable tubulars
GB2421744A (en) * 2005-01-04 2006-07-05 Cutting & Wear Resistant Dev Under-reamer or stabiliser with hollow, extendable arms and inclined ribs
US20080035328A1 (en) * 2006-08-09 2008-02-14 Tejas Associates, Inc. Laminate pressure containing body for a well tool
US7798213B2 (en) * 2006-12-14 2010-09-21 Baker Hughes Incorporated Radial spring latch apparatus and methods for making and using same
GB2454697B (en) * 2007-11-15 2011-11-30 Schlumberger Holdings Anchoring systems for drilling tools
US8079416B2 (en) * 2009-03-13 2011-12-20 Reservoir Management Inc. Plug for a perforated liner and method of using same
US9371715B2 (en) * 2010-10-15 2016-06-21 Schlumberger Technology Corporation Downhole extending ports
NO333258B1 (no) * 2011-09-13 2013-04-22 Geir Habesland Verktoy og fremgangsmate for sentrering av fôringsror
CN102322230A (zh) * 2011-09-21 2012-01-18 中特石油器材有限公司 一种扶正器
CN202391354U (zh) * 2011-09-21 2012-08-22 中特石油器材有限公司 一种扶正器
CN102359350B (zh) * 2011-10-09 2013-09-18 中国海洋石油总公司 一种扶正器
CN103670296B (zh) * 2012-09-18 2016-03-09 中国石油天然气股份有限公司 套管扶正器
US9033046B2 (en) * 2012-10-10 2015-05-19 Baker Hughes Incorporated Multi-zone fracturing and sand control completion system and method thereof
CN204082044U (zh) * 2014-07-16 2015-01-07 大庆福斯特科技开发有限公司 井下开启自锁式套管居中装置
CN104234647B (zh) * 2014-07-16 2017-02-08 大庆福斯特科技开发有限公司 一种井下开启自锁式套管居中装置

Also Published As

Publication number Publication date
WO2016008400A1 (zh) 2016-01-21
SG11201601868RA (en) 2016-04-28
CN104234647A (zh) 2014-12-24
EP3170964A4 (de) 2017-09-20
US20160215574A1 (en) 2016-07-28
CN104234647B (zh) 2017-02-08

Similar Documents

Publication Publication Date Title
EP3170964A1 (de) Selbstverriegelnde bohrlochverrohrungszentriervorrichtung mit unterirdischer öffnung
EP1389260B1 (de) Radial ausdehnbares rohr mit gestütztem endteil
US9145753B2 (en) Trapped pressure compensator
US20130248209A1 (en) High pressure tie back receptacle and seal assembly
US20150368990A1 (en) Centralizer with collaborative spring force
CN203847019U (zh) 一种限位式液压套管扶正工具
CN109138856B (zh) 连续油管连接器
US9856704B2 (en) Telescoping slip joint assembly
SG192752A1 (en) System and method for high-pressure high-temperature tieback
BR112017009441B1 (pt) Suspensor de liner, método para acoplar um liner a uma coluna de revestimento de um furo de poço e sistema para realizar operações subterrâneas
US20200040669A1 (en) Methods and systems for reducing drag and friction during drilling
US20130043657A1 (en) S-seal
US9476281B2 (en) High pressure swell seal
CN202970610U (zh) 油气井井下套管封隔器胶筒
CN109441390A (zh) 一种36寸单筒双井口采油装置
US11078743B2 (en) System and methodology for providing bypass through a swellable packer
CN209212173U (zh) 连续油管连接器
CN103835675A (zh) 一种长胶筒压缩式裸眼封隔器
US20210025244A1 (en) Centralizer with dissolvable retaining members
CN207513577U (zh) 一种管外防气窜装置
CN204082044U (zh) 井下开启自锁式套管居中装置
RU2597899C1 (ru) Центратор для колонны труб, спускаемой в наклонно-горизонтальную скважину
CN204186345U (zh) 一种遇油膨胀封隔器
CN204591195U (zh) 一种尾管悬挂器
CN205135579U (zh) 水平井外套式复合射孔用锁紧降阻扶正装置

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20170220

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

A4 Supplementary search report drawn up and despatched

Effective date: 20170822

RIC1 Information provided on ipc code assigned before grant

Ipc: E21B 17/10 20060101AFI20170816BHEP

DAV Request for validation of the european patent (deleted)
DAX Request for extension of the european patent (deleted)
17Q First examination report despatched

Effective date: 20181128

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN WITHDRAWN

18W Application withdrawn

Effective date: 20190227