GB8623427D0 - Rotary drill bits - Google Patents

Rotary drill bits

Info

Publication number
GB8623427D0
GB8623427D0 GB868623427A GB8623427A GB8623427D0 GB 8623427 D0 GB8623427 D0 GB 8623427D0 GB 868623427 A GB868623427 A GB 868623427A GB 8623427 A GB8623427 A GB 8623427A GB 8623427 D0 GB8623427 D0 GB 8623427D0
Authority
GB
United Kingdom
Prior art keywords
drill bits
rotary drill
rotary
bits
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.)
Granted
Application number
GB868623427A
Other versions
GB2181173B (en
GB2181173A (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.)
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 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
    • 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
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 true GB8623427D0 (en) 1986-11-05
GB2181173A GB2181173A (en) 1987-04-15
GB2181173B 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
GB2181173B (en) 1988-12-21
GB2181173A (en) 1987-04-15

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Legal Events

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

Effective date: 19940930