GB2181173B - Improvements in or relating to rotary drill bits - Google Patents

Improvements in or relating to rotary drill bits

Info

Publication number
GB2181173B
GB2181173B GB08623427A GB8623427A GB2181173B GB 2181173 B GB2181173 B GB 2181173B GB 08623427 A GB08623427 A GB 08623427A GB 8623427 A GB8623427 A GB 8623427A GB 2181173 B GB2181173 B GB 2181173B
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
Application number
GB08623427A
Other versions
GB2181173A (en
GB8623427D0 (en
Inventor
John Denzil Barr
John Fuller
Malcolm Roy Taylor
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.)
NL Petroleum Products Ltd
Original Assignee
NL Petroleum Products 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 GB858524146A external-priority patent/GB8524146D0/en
Application filed by NL Petroleum Products Ltd filed Critical NL Petroleum Products Ltd
Priority to GB08623427A priority Critical patent/GB2181173B/en
Publication of GB8623427D0 publication Critical patent/GB8623427D0/en
Publication of GB2181173A publication Critical patent/GB2181173A/en
Application granted granted Critical
Publication of GB2181173B publication Critical patent/GB2181173B/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
    • E21B10/60—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 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
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Drilling Tools (AREA)
GB08623427A 1985-10-01 1986-09-30 Improvements in or relating to rotary drill bits Expired GB2181173B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08623427A GB2181173B (en) 1985-10-01 1986-09-30 Improvements in or relating to rotary drill bits

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB858524146A GB8524146D0 (en) 1985-10-01 1985-10-01 Rotary drill bits
GB08623427A GB2181173B (en) 1985-10-01 1986-09-30 Improvements in or relating to rotary drill bits

Publications (3)

Publication Number Publication Date
GB8623427D0 GB8623427D0 (en) 1986-11-05
GB2181173A GB2181173A (en) 1987-04-15
GB2181173B true GB2181173B (en) 1988-12-21

Family

ID=26289827

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08623427A Expired GB2181173B (en) 1985-10-01 1986-09-30 Improvements in or relating to rotary drill bits

Country Status (1)

Country Link
GB (1) GB2181173B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4883132A (en) * 1987-10-13 1989-11-28 Eastman Christensen Drag bit for drilling in plastic formation with maximum chip clearance and hydraulic for direct chip impingement
CA1302393C (en) * 1987-10-13 1992-06-02 Gordon A. Tibbitts Drag bit for drilling in plastic formations with maximum chip clearance and hydraulics for direct chip impingement
US5651420A (en) * 1995-03-17 1997-07-29 Baker Hughes, Inc. Drilling apparatus with dynamic cuttings removal and cleaning
US5904213A (en) * 1995-10-10 1999-05-18 Camco International (Uk) Limited Rotary drill bits

Also Published As

Publication number Publication date
GB2181173A (en) 1987-04-15
GB8623427D0 (en) 1986-11-05

Similar Documents

Publication Publication Date Title
GB2161849B (en) Improvements in or relating to rotary drill bits
EP0219992A3 (en) Improvements in or relating to rotary drill bits
GB2197676B (en) Improvements in or relating to rotary drill bits
GB2238334B (en) Improvements in or relating to rotary drill bits
GB2218131B (en) Improvements in or relating to rotary drill bits
GB2238336B (en) Improvements in or relating to rotary drill bits
GB2150616B (en) Improvements in or relating to rotary drill bits
GB8501702D0 (en) Rotary drill bits
GB8508621D0 (en) Rotary drill bits
GB9025464D0 (en) Improvements in or relating to rotary drill bits
GB2190024B (en) Improvements in or relating to rotary drill bits
GB8811390D0 (en) Improvements in/relating to rotary drill bits
DE3569403D1 (en) Improvements in rotary drill bits
DE3664799D1 (en) Improvements in or relating to rotary drill bits
DE3663973D1 (en) Improvements in or relating to cutting assemblies for rotary drill bits
DE3570718D1 (en) Improvements in or relating to rotary drill bits
DE3478628D1 (en) Improvements in or relating to rotary drill bits
GB8505244D0 (en) Rotary drill bits
GB2190120B (en) Improvements in or relating to rotary drill bits
GB8516776D0 (en) Rotary drill bits
GB2181173B (en) Improvements in or relating to rotary drill bits
GB8508622D0 (en) Rotary drill bits
IE56735B1 (en) Improvements in or relating to percussive drills
GB8521924D0 (en) Rotary drill bits
GB8522435D0 (en) Rotary drill bits

Legal Events

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

Effective date: 19940930