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GB2031481B - Drilling bits - Google Patents

Drilling bits

Info

Publication number
GB2031481B
GB2031481B GB7838250A GB7838250A GB2031481B GB 2031481 B GB2031481 B GB 2031481B GB 7838250 A GB7838250 A GB 7838250A GB 7838250 A GB7838250 A GB 7838250A GB 2031481 B GB2031481 B GB 2031481B
Authority
GB
United Kingdom
Prior art keywords
drilling bits
drilling
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
Application number
GB7838250A
Other versions
GB2031481A (en
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.)
Individual
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
Priority to GB7838250A priority Critical patent/GB2031481B/en
Publication of GB2031481A publication Critical patent/GB2031481A/en
Application granted granted Critical
Publication of GB2031481B publication Critical patent/GB2031481B/en
Expired 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
    • E21B10/64—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe
    • E21B10/66—Drill bits characterised by the whole or part thereof being insertable into or removable from the borehole without withdrawing the drilling pipe the cutting element movable through the drilling pipe and laterally shiftable
    • 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
    • E21B10/36—Percussion drill bits
    • E21B10/40—Percussion drill bits with leading portion

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)
GB7838250A 1978-09-26 1978-09-26 Drilling bits Expired GB2031481B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7838250A GB2031481B (en) 1978-09-26 1978-09-26 Drilling bits

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB7838250A GB2031481B (en) 1978-09-26 1978-09-26 Drilling bits

Publications (2)

Publication Number Publication Date
GB2031481A GB2031481A (en) 1980-04-23
GB2031481B true GB2031481B (en) 1982-09-29

Family

ID=10499921

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7838250A Expired GB2031481B (en) 1978-09-26 1978-09-26 Drilling bits

Country Status (1)

Country Link
GB (1) GB2031481B (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE421551B (en) * 1980-03-26 1982-01-04 Sandvik Ab DRILLING TOOL FOR ROTATION AND / OR DRILLING
SE454196C (en) * 1983-09-23 1991-11-04 Jan Persson EARTH AND MOUNTAIN DRILLING DEVICE CONCERNING BORING AND LINING OF THE DRILL
SE460300B (en) * 1986-10-03 1989-09-25 Loevab Loef Och Oestlund Ab ROTARY DRILLING TOOL WITH HEATING PART FOR A SOIL DRILLING MACHINE
GB2216926B (en) * 1988-04-06 1992-08-12 Jumblefierce Limited Drilling method and apparatus
SE8901199L (en) * 1989-04-05 1990-10-06 Uniroc Ab Eccentric drill bit
SE8901200L (en) * 1989-04-05 1990-10-06 Uniroc Ab DEVICE FOR FLUSHING A DRILL
US5361859A (en) * 1993-02-12 1994-11-08 Baker Hughes Incorporated Expandable gage bit for drilling and method of drilling
DE4408514C1 (en) * 1994-03-14 1995-05-24 Wirth Co Kg Masch Bohr Drilling tool for producing holes in ground
US6394200B1 (en) 1999-10-28 2002-05-28 Camco International (U.K.) Limited Drillout bi-center bit
EP1270868B1 (en) * 1999-10-28 2005-09-14 Camco International (UK) Limited A bi-centre bit for drilling out through a casing shoe
US6607046B1 (en) 1999-11-12 2003-08-19 Shell Oil Company Expandable drill bit
US6739416B2 (en) * 2002-03-13 2004-05-25 Baker Hughes Incorporated Enhanced offset stabilization for eccentric reamers
WO2006112763A1 (en) * 2005-04-21 2006-10-26 Loef Uno Drilling tool and method for down-the-hole drilling
US12291925B1 (en) * 2023-10-20 2025-05-06 Center Rock Inc. Underreamer drill hammer

Also Published As

Publication number Publication date
GB2031481A (en) 1980-04-23

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19980925