CA2234089A1 - Drill pipe/casing protector assembly - Google Patents

Drill pipe/casing protector assembly

Info

Publication number
CA2234089A1
CA2234089A1 CA002234089A CA2234089A CA2234089A1 CA 2234089 A1 CA2234089 A1 CA 2234089A1 CA 002234089 A CA002234089 A CA 002234089A CA 2234089 A CA2234089 A CA 2234089A CA 2234089 A1 CA2234089 A1 CA 2234089A1
Authority
CA
Canada
Prior art keywords
drill pipe
sleeve
casing
well bore
under pressure
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
CA002234089A
Other languages
French (fr)
Other versions
CA2234089C (en
Inventor
R. Ernst Krueger
N. Bruce Moore
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.)
WWT International Inc
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2234089A1 publication Critical patent/CA2234089A1/en
Application granted granted Critical
Publication of CA2234089C publication Critical patent/CA2234089C/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
    • 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
    • E21B17/1007—Wear protectors; Centralising devices, e.g. stabilisers for the internal surface of a pipe, e.g. wear bushings for underwater well-heads
    • 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
    • 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
    • E21B17/1057—Centralising devices with rollers or with a relatively rotating sleeve
    • E21B17/1064—Pipes or rods with a relatively rotating sleeve

Abstract

A drill pipe/casing protector assembly (18) for an underground drilling system comprises a well bore in an underground formation, a fixed tubular casing (16) installed in the well bore (14), a rotary drill pipe (12) extending through the casing (16) and having an O.D. spaced from an I.D. of casing (or well bore) during normal drilling operation, and a protective sleeve (18) mounted around the drill pipe and spaced from the I.D. of the casing, and upper and lower thrust bearings (22, 24) affixed to the drill pipe above, and below the sleeve to retain the sleeve in a fixed axial position on the drill pipe. The sleeve (18) contacts the I.D. of the casing when the drill pipe (12) deflects off-center to protect the casing from contact with the drill pipe or its tool joints during rotation of the drill pipe. Axial grooves (26) in an I.D. wall of the sleeve allow fluid under pressure to circulate through a space formed between the I.D. of the sleeve (18) and the O.D. of the drill pipe. Generally flat bearing surface regions (32) on the I.D. wall of the sleeve between adjacent grooves (26) are arranged in a polygon configuration for tangentially contacting the O.D. of the drill pipe around the sleeve I.D.
The sleeve (18) separates from the O.D. of the drill pipe upon circulation of a fluid film under pressure between the sleeve (18) and the drill pipe (12) to produce a fluid bearing effect with reduced frictional drag. End slots at the top and the bottom annular end walls of the sleeve provide enhanced fluid bearing effects in the clearance regions between the sleeve and the adjacent thrust bearings (22, 24).
CA002234089A 1995-10-12 1996-10-10 Drill pipe/casing protector assembly Expired - Lifetime CA2234089C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US54209895A 1995-10-12 1995-10-12
US08/542,098 1995-10-12
PCT/US1996/016410 WO1997013951A1 (en) 1995-10-12 1996-10-10 Drill pipe/casing protector assembly

Publications (2)

Publication Number Publication Date
CA2234089A1 true CA2234089A1 (en) 1997-04-17
CA2234089C CA2234089C (en) 2004-03-02

Family

ID=24162326

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002234089A Expired - Lifetime CA2234089C (en) 1995-10-12 1996-10-10 Drill pipe/casing protector assembly

Country Status (6)

Country Link
US (1) US5803193A (en)
AU (1) AU703107B2 (en)
CA (1) CA2234089C (en)
GB (1) GB2320045B (en)
NO (4) NO323756B1 (en)
WO (1) WO1997013951A1 (en)

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BRPI1006152B1 (en) * 2009-11-13 2019-11-26 Wwt Int Inc non-rotating downhole sleeve and torque reduction method
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US20140041946A1 (en) * 2011-07-26 2014-02-13 Keith E. Holtzman Friction reduction device for drill pipe
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US9447648B2 (en) 2011-10-28 2016-09-20 Wwt North America Holdings, Inc High expansion or dual link gripper
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GB201202640D0 (en) * 2012-02-16 2012-04-04 Simpson Neil A A Swaged friction reducing collar
US10309191B2 (en) 2012-03-12 2019-06-04 Managed Pressure Operations Pte. Ltd. Method of and apparatus for drilling a subterranean wellbore
GB2501094A (en) 2012-04-11 2013-10-16 Managed Pressure Operations Method of handling a gas influx in a riser
WO2014071494A1 (en) 2012-11-06 2014-05-15 Evolution Engineering Inc. Universal downhole probe system
WO2014082183A1 (en) * 2012-11-29 2014-06-05 Per Angman Tubular centralizer
US10100588B2 (en) * 2012-11-29 2018-10-16 Per Angman Mixed form tubular centralizers and method of use
CN103233717B (en) * 2013-04-15 2016-02-10 中联重科股份有限公司 Rotary drilling rig and control method, equipment and system
GB201309853D0 (en) 2013-05-29 2013-07-17 Simpson Neil A A Torque reduction sub
CN103321594B (en) * 2013-06-27 2015-11-04 中国海洋石油总公司 The drilling well anti-mud drum centralizer of closed screw wing
US9488020B2 (en) 2014-01-27 2016-11-08 Wwt North America Holdings, Inc. Eccentric linkage gripper
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Also Published As

Publication number Publication date
NO20051297D0 (en) 2005-03-14
NO20051298L (en) 1998-06-12
WO1997013951A1 (en) 1997-04-17
CA2234089C (en) 2004-03-02
NO981654D0 (en) 1998-04-08
GB2320045B (en) 1999-08-25
NO20051299L (en) 1998-06-12
GB9807100D0 (en) 1998-06-03
NO20051297L (en) 1998-06-12
NO323756B1 (en) 2007-07-02
NO20051298D0 (en) 2005-03-14
NO20051299D0 (en) 2005-03-14
AU7444896A (en) 1997-04-30
US5803193A (en) 1998-09-08
NO981654L (en) 1998-06-12
AU703107B2 (en) 1999-03-18
GB2320045A (en) 1998-06-10

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Legal Events

Date Code Title Description
EEER Examination request
MKEX Expiry

Effective date: 20161011