DE69825520D1 - Verbesserungen an Drehbohrmeisseln - Google Patents

Verbesserungen an Drehbohrmeisseln

Info

Publication number
DE69825520D1
DE69825520D1 DE69825520T DE69825520T DE69825520D1 DE 69825520 D1 DE69825520 D1 DE 69825520D1 DE 69825520 T DE69825520 T DE 69825520T DE 69825520 T DE69825520 T DE 69825520T DE 69825520 D1 DE69825520 D1 DE 69825520D1
Authority
DE
Germany
Prior art keywords
drill bit
twist drill
twist
bit
drill
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.)
Expired - Lifetime
Application number
DE69825520T
Other languages
English (en)
Other versions
DE69825520T2 (de
Inventor
Douglas Caraway
John Hayward
Malcolm Roy Taylor
Tom Scott Roberts
Steven Taylor
Graham Watson
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.)
ReedHycalog UK Ltd
Original Assignee
Camco International UK 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
Application filed by Camco International UK Ltd filed Critical Camco International UK Ltd
Publication of DE69825520D1 publication Critical patent/DE69825520D1/de
Application granted granted Critical
Publication of DE69825520T2 publication Critical patent/DE69825520T2/de
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
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/54—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits
    • E21B10/55—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of the rotary drag type, e.g. fork-type bits with preformed cutting elements
    • 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
    • E21B10/00—Drill bits
    • E21B10/003—Drill bits with cutting edges facing in opposite axial directions
    • 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
    • E21B10/00—Drill bits
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • 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
    • E21B10/00—Drill bits
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/602—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a rotary drag type bit with blades
    • 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
    • E21B17/1092—Gauge section of drill bits
DE69825520T 1997-04-16 1998-04-09 Verbesserungen an Drehbohrmeisseln Expired - Lifetime DE69825520T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/835,812 US5904213A (en) 1995-10-10 1997-04-16 Rotary drill bits
US835812 1997-04-16

Publications (2)

Publication Number Publication Date
DE69825520D1 true DE69825520D1 (de) 2004-09-16
DE69825520T2 DE69825520T2 (de) 2005-08-11

Family

ID=25270529

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69825520T Expired - Lifetime DE69825520T2 (de) 1997-04-16 1998-04-09 Verbesserungen an Drehbohrmeisseln

Country Status (4)

Country Link
US (4) US5904213A (de)
EP (1) EP0872624B1 (de)
DE (1) DE69825520T2 (de)
GB (1) GB2326657B (de)

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* Cited by examiner, † Cited by third party
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US5967246A (en) 1999-10-19
EP0872624A2 (de) 1998-10-21
GB2326657B (en) 2002-02-27
US6092613A (en) 2000-07-25
US5904213A (en) 1999-05-18
US5992547A (en) 1999-11-30
GB2326657A (en) 1998-12-30
DE69825520T2 (de) 2005-08-11
EP0872624B1 (de) 2004-08-11
EP0872624A3 (de) 1999-04-14
GB9807554D0 (en) 1998-06-10

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