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GB2294712B - Improvements in or relating to rotary drill bits - Google Patents

Improvements in or relating to rotary drill bits

Info

Publication number
GB2294712B
GB2294712B GB9519863A GB9519863A GB2294712B GB 2294712 B GB2294712 B GB 2294712B GB 9519863 A GB9519863 A GB 9519863A GB 9519863 A GB9519863 A GB 9519863A GB 2294712 B GB2294712 B GB 2294712B
Authority
GB
United Kingdom
Prior art keywords
relating
drill bits
rotary drill
rotary
bits
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 - Fee Related
Application number
GB9519863A
Other versions
GB9519863D0 (en
GB2294712A (en
Inventor
Alex Newton
Malcolm Roy Taylor
John Fuller
Andrew Murdock
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.)
Camco Drilling Group Ltd
Original Assignee
Camco Drilling Group 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 GB9421924A external-priority patent/GB9421924D0/en
Application filed by Camco Drilling Group Ltd filed Critical Camco Drilling Group Ltd
Priority to GB9519863A priority Critical patent/GB2294712B/en
Publication of GB9519863D0 publication Critical patent/GB9519863D0/en
Publication of GB2294712A publication Critical patent/GB2294712A/en
Application granted granted Critical
Publication of GB2294712B publication Critical patent/GB2294712B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • E21B10/00—Drill bits
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other cutting elements
    • 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
    • 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 OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK 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

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)
GB9519863A 1994-11-01 1995-09-29 Improvements in or relating to rotary drill bits Expired - Fee Related GB2294712B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9519863A GB2294712B (en) 1994-11-01 1995-09-29 Improvements in or relating to rotary drill bits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9421924A GB9421924D0 (en) 1994-11-01 1994-11-01 Improvements in or relating to rotary drill bits
GB9519863A GB2294712B (en) 1994-11-01 1995-09-29 Improvements in or relating to rotary drill bits

Publications (3)

Publication Number Publication Date
GB9519863D0 GB9519863D0 (en) 1995-11-29
GB2294712A GB2294712A (en) 1996-05-08
GB2294712B true GB2294712B (en) 1998-06-24

Family

ID=26305896

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9519863A Expired - Fee Related GB2294712B (en) 1994-11-01 1995-09-29 Improvements in or relating to rotary drill bits

Country Status (1)

Country Link
GB (1) GB2294712B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9717505D0 (en) * 1997-08-20 1997-10-22 Camco Int Uk Ltd Improvements in or relating to cutting structures for rotary drill bits
GB9708022D0 (en) * 1997-04-21 1997-06-11 Camco Int Uk Ltd Curved blades and gauge
GB9712342D0 (en) * 1997-06-14 1997-08-13 Camco Int Uk Ltd Improvements in or relating to rotary drill bits
US6349780B1 (en) * 2000-08-11 2002-02-26 Baker Hughes Incorporated Drill bit with selectively-aggressive gage pads
DE60140617D1 (en) 2000-09-20 2010-01-07 Camco Int Uk Ltd POLYCRYSTALLINE DIAMOND WITH A SURFACE ENRICHED ON CATALYST MATERIAL
US6615934B2 (en) * 2001-08-15 2003-09-09 Smith International, Inc. PDC drill bit having cutting structure adapted to improve high speed drilling performance
GB2453875C (en) 2006-10-02 2009-09-16 Smith International Drill bits with dropping tendencies
US7703557B2 (en) 2007-06-11 2010-04-27 Smith International, Inc. Fixed cutter bit with backup cutter elements on primary blades
US9016407B2 (en) 2007-12-07 2015-04-28 Smith International, Inc. Drill bit cutting structure and methods to maximize depth-of-cut for weight on bit applied
US8100202B2 (en) 2008-04-01 2012-01-24 Smith International, Inc. Fixed cutter bit with backup cutter elements on secondary blades
US8327956B2 (en) 2008-12-19 2012-12-11 Varel International, Ind., L.P. Multi-set PDC drill bit and method
CN103510860A (en) * 2013-10-09 2014-01-15 无锡中地地质装备有限公司 Staggered tooth-shaped drill bit for exploratory drilling

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252574A (en) * 1991-02-01 1992-08-12 Reed Tool Co Rotary drill bits and methods of designing such drill bits
US5239075A (en) * 1991-08-21 1993-08-24 Eli Lilly And Company Process for the preparation of benzo (f) quinolinones

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2252574A (en) * 1991-02-01 1992-08-12 Reed Tool Co Rotary drill bits and methods of designing such drill bits
US5239075A (en) * 1991-08-21 1993-08-24 Eli Lilly And Company Process for the preparation of benzo (f) quinolinones

Also Published As

Publication number Publication date
GB9519863D0 (en) 1995-11-29
GB2294712A (en) 1996-05-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20060929