GB2294070B - Improvements in or relating to rotary drill bits - Google Patents

Improvements in or relating to rotary drill bits

Info

Publication number
GB2294070B
GB2294070B GB9519836A GB9519836A GB2294070B GB 2294070 B GB2294070 B GB 2294070B GB 9519836 A GB9519836 A GB 9519836A GB 9519836 A GB9519836 A GB 9519836A GB 2294070 B GB2294070 B GB 2294070B
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 - Lifetime
Application number
GB9519836A
Other versions
GB9519836D0 (en
GB2294070A (en
Inventor
John Martin Clegg
Alex Newton
Steven Taylor
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 GB9420838A external-priority patent/GB9420838D0/en
Application filed by Camco Drilling Group Ltd filed Critical Camco Drilling Group Ltd
Priority to GB9519836A priority Critical patent/GB2294070B/en
Publication of GB9519836D0 publication Critical patent/GB9519836D0/en
Publication of GB2294070A publication Critical patent/GB2294070A/en
Application granted granted Critical
Publication of GB2294070B publication Critical patent/GB2294070B/en
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
    • E21B10/60—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
GB9519836A 1994-10-15 1995-09-29 Improvements in or relating to rotary drill bits Expired - Lifetime GB2294070B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9519836A GB2294070B (en) 1994-10-15 1995-09-29 Improvements in or relating to rotary drill bits

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9420838A GB9420838D0 (en) 1994-10-15 1994-10-15 Improvements in or relating to rotary drill bits
GBGB9518267.1A GB9518267D0 (en) 1994-10-15 1995-09-08 Improvements in or relating to rotary drill bits
GB9519836A GB2294070B (en) 1994-10-15 1995-09-29 Improvements in or relating to rotary drill bits

Publications (3)

Publication Number Publication Date
GB9519836D0 GB9519836D0 (en) 1995-11-29
GB2294070A GB2294070A (en) 1996-04-17
GB2294070B true GB2294070B (en) 1998-04-22

Family

ID=27267431

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9519836A Expired - Lifetime GB2294070B (en) 1994-10-15 1995-09-29 Improvements in or relating to rotary drill bits

Country Status (1)

Country Link
GB (1) GB2294070B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5904213A (en) * 1995-10-10 1999-05-18 Camco International (Uk) Limited Rotary drill bits
US6089336A (en) * 1995-10-10 2000-07-18 Camco International (Uk) Limited Rotary drill bits
GB9708022D0 (en) * 1997-04-21 1997-06-11 Camco Int Uk Ltd Curved blades and gauge
GB2339811B (en) * 1998-07-22 2002-05-22 Camco Internat Improvements in or relating to rotary drill bits

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB713998A (en) * 1951-11-13 1954-08-18 Reed Roller Bit Co Improvements in or relating to drill bits
US5244039A (en) * 1991-10-31 1993-09-14 Camco Drilling Group Ltd. Rotary drill bits
WO1994012760A1 (en) * 1992-12-03 1994-06-09 Jaervelae Jorma Drilling apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB713998A (en) * 1951-11-13 1954-08-18 Reed Roller Bit Co Improvements in or relating to drill bits
US5244039A (en) * 1991-10-31 1993-09-14 Camco Drilling Group Ltd. Rotary drill bits
WO1994012760A1 (en) * 1992-12-03 1994-06-09 Jaervelae Jorma Drilling apparatus

Also Published As

Publication number Publication date
GB9519836D0 (en) 1995-11-29
GB2294070A (en) 1996-04-17

Similar Documents

Publication Publication Date Title
GB9421924D0 (en) Improvements in or relating to rotary drill bits
GB2315789B (en) Improvements in or relating to rotary drill bits
GB2296880B (en) Improvements in or relating to rotary drill bits
GB2326657B (en) Improvements in or relating to rotary drill bits
GB2326659B (en) Improvements in or relating to rotary drill bits
GB9603402D0 (en) Improvements in or relating to rotary drill bits
GB9708428D0 (en) Improvements in or relating to rotary drill bits
GB2326656B (en) Improvements in or relating to rotary drill bits
GB2325014B (en) Improvements in or relating to rotary drill bits
GB9518267D0 (en) Improvements in or relating to rotary drill bits
GB9505783D0 (en) Improvements in or relating to rotary drill bits
GB9509555D0 (en) Improvements in or relating to rotary drill bits
GB2277760B (en) Improvements in or relating to rotary drill bits
GB2294712B (en) Improvements in or relating to rotary drill bits
GB2294071B (en) Improvements in or relating to rotary drill bits
GB2273946B (en) Improvements in or relating to rotary drill bits
GB2294069B (en) Improvements in or relating to rotary drills bits
GB9420839D0 (en) Improvements in or relating to rotary drill bits
GB2294070B (en) Improvements in or relating to rotary drill bits
GB2361496B (en) Improvements in or relating to rotary drill bits
GB2318994B (en) Improvements in or relating to rotary drill bits
GB2300657B (en) Improvements in or relating to rotary drill bits
GB9600758D0 (en) Improvements in or relating to rotary drill bits
GB9616620D0 (en) Improvements in or relating to rotary drill bits
GB2359838B (en) Improvements in or relating to rotary drill bits

Legal Events

Date Code Title Description
PE20 Patent expired after termination of 20 years

Expiry date: 20150928