EP0787888A3 - Circulating sub - Google Patents

Circulating sub Download PDF

Info

Publication number
EP0787888A3
EP0787888A3 EP96306334A EP96306334A EP0787888A3 EP 0787888 A3 EP0787888 A3 EP 0787888A3 EP 96306334 A EP96306334 A EP 96306334A EP 96306334 A EP96306334 A EP 96306334A EP 0787888 A3 EP0787888 A3 EP 0787888A3
Authority
EP
European Patent Office
Prior art keywords
body member
holes
circulating sub
members
obturated
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.)
Granted
Application number
EP96306334A
Other languages
German (de)
French (fr)
Other versions
EP0787888B1 (en
EP0787888A2 (en
Inventor
Andrew Mcdonald
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.)
National Oilwell UK Ltd
Original Assignee
Specialty Tools Ltd
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
Priority claimed from GBGB9517841.4A external-priority patent/GB9517841D0/en
Priority claimed from GBGB9613894.6A external-priority patent/GB9613894D0/en
Application filed by Specialty Tools Ltd filed Critical Specialty Tools Ltd
Publication of EP0787888A2 publication Critical patent/EP0787888A2/en
Publication of EP0787888A3 publication Critical patent/EP0787888A3/en
Application granted granted Critical
Publication of EP0787888B1 publication Critical patent/EP0787888B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B23/00—Apparatus for displacing, setting, locking, releasing, or removing tools, packers or the like in the boreholes or wells
    • E21B23/004—Indexing systems for guiding relative movement between telescoping parts of downhole tools
    • E21B23/006—"J-slot" systems, i.e. lug and slot indexing mechanisms
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/10—Valve arrangements in drilling-fluid circulation systems
    • E21B21/103—Down-hole by-pass valve arrangements, i.e. between the inside of the drill string and the annulus

Abstract

There is provided a circulating sub apparatus (50; 100) having a tubular outer body member (1; 51, 53, 54, 55, 56, 57) and a tubular inner body member (4; 52, 65). The outer body member (1; 51, 53, 54, 55, 56, 57) and the inner body member (4; 52, 65) each have one or more holes (8, 16; 66, 68) substantially transverse to the longitudinal axis of the outer (1; 51, 53, 54, 55, 56, 57) and inner (4; 52, 65) body members. A displacement mechanism produces relative movement between the outer (1; 51, 53, 54, 55, 56, 57) and inner (4; 52, 65) body members such that the outer (1; 51, 53, 54, 55, 56, 57) and inner (4; 52, 65) body members may be repeatably moved between an aligned position, in which the one or more holes (8, 16; 66, 68) on the inner body member (4; 52, 65) are aligned with the one or more holes (8, 16; 66, 68) on the outer body member (1; 51, 53, 54, 55, 56, 57), and an obturated position, in which the one or more holes (8, 16; 66, 68) on the inner body member (4; 52, 65) are obturated by the outer body member (1; 51, 53, 54, 55, 56, 57).
EP96306334A 1995-09-01 1996-09-02 Circulating sub Expired - Lifetime EP0787888B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB9517841 1995-09-01
GBGB9517841.4A GB9517841D0 (en) 1995-09-01 1995-09-01 A circulating sub apparatus
GBGB9613894.6A GB9613894D0 (en) 1996-07-03 1996-07-03 A circulating sub apparatus
GB9613894 1996-07-03

Publications (3)

Publication Number Publication Date
EP0787888A2 EP0787888A2 (en) 1997-08-06
EP0787888A3 true EP0787888A3 (en) 1998-05-20
EP0787888B1 EP0787888B1 (en) 2005-03-02

Family

ID=26307669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96306334A Expired - Lifetime EP0787888B1 (en) 1995-09-01 1996-09-02 Circulating sub

Country Status (2)

Country Link
EP (1) EP0787888B1 (en)
DE (1) DE69634399T2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9913370D0 (en) * 1999-06-10 1999-08-11 Nat Oilwell Uk Ltd A circulating sub apparatus and method
US6349763B1 (en) * 1999-08-20 2002-02-26 Halliburton Energy Services, Inc. Electrical surface activated downhole circulating sub
CA2473372C (en) 2002-01-22 2012-11-20 Presssol Ltd. Two string drilling system using coil tubing
US6834726B2 (en) 2002-05-29 2004-12-28 Weatherford/Lamb, Inc. Method and apparatus to reduce downhole surge pressure using hydrostatic valve
GB0312180D0 (en) * 2003-05-28 2003-07-02 Specialised Petroleum Serv Ltd Drilling sub
CA2913365C (en) 2007-11-20 2017-01-24 National Oilwell Varco, L.P. Circulation sub with indexing mechanism
US20200308919A1 (en) 2016-06-22 2020-10-01 Advancetech Aps Downhole Tool with Directional Nozzle and a Drill String Thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2054008A (en) * 1979-06-13 1981-02-11 Commissariat Energie Atomique Turbo-coring device equipped with a following pipe
US4298077A (en) * 1979-06-11 1981-11-03 Smith International, Inc. Circulation valve for in-hole motors
US5443129A (en) * 1994-07-22 1995-08-22 Smith International, Inc. Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole
WO1996030621A1 (en) * 1995-03-24 1996-10-03 Uwg Limited Flow control tool

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4632187A (en) * 1984-05-24 1986-12-30 Otis Engineering Corporation Well safety and kill valve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4298077A (en) * 1979-06-11 1981-11-03 Smith International, Inc. Circulation valve for in-hole motors
GB2054008A (en) * 1979-06-13 1981-02-11 Commissariat Energie Atomique Turbo-coring device equipped with a following pipe
US5443129A (en) * 1994-07-22 1995-08-22 Smith International, Inc. Apparatus and method for orienting and setting a hydraulically-actuatable tool in a borehole
WO1996030621A1 (en) * 1995-03-24 1996-10-03 Uwg Limited Flow control tool

Also Published As

Publication number Publication date
DE69634399D1 (en) 2005-04-07
DE69634399T2 (en) 2005-12-29
EP0787888B1 (en) 2005-03-02
EP0787888A2 (en) 1997-08-06

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