CA2001178A1 - Rotary drill bit for drilling through sticky formations - Google Patents

Rotary drill bit for drilling through sticky formations

Info

Publication number
CA2001178A1
CA2001178A1 CA002001178A CA2001178A CA2001178A1 CA 2001178 A1 CA2001178 A1 CA 2001178A1 CA 002001178 A CA002001178 A CA 002001178A CA 2001178 A CA2001178 A CA 2001178A CA 2001178 A1 CA2001178 A1 CA 2001178A1
Authority
CA
Canada
Prior art keywords
drilling
waterways
drill bit
rock flour
rotary 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
CA002001178A
Other languages
French (fr)
Other versions
CA2001178C (en
Inventor
Djurre Hans Zijsling
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.)
Shell Internationale Research Maatschappij BV
Original Assignee
Shell Internationale Research Maatschappij BV
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 Shell Internationale Research Maatschappij BV filed Critical Shell Internationale Research Maatschappij BV
Publication of CA2001178A1 publication Critical patent/CA2001178A1/en
Application granted granted Critical
Publication of CA2001178C publication Critical patent/CA2001178C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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

Abstract

A drill bit for drilling through sticky formations, such as chalk or marl, comprises a plurality of waterways (4) for transporting drilling fluid and rock flour to the gauge of the bit. These waterways have in downstream direction gradually increasing cross-sectional areas A, the increase of size of said areas along the length of a waterway being at least substantially proportional to the squared radius r thereof from the central axis (10). In this manner the rock flour velocity remains equal or decreases in downstream direction in the waterways so that the risk of rock flour accumulation and compaction is reduced.
CA002001178A 1988-10-20 1989-10-20 Rotary drill bit for drilling through sticky formations Expired - Fee Related CA2001178C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8824546 1988-10-20
GB888824546A GB8824546D0 (en) 1988-10-20 1988-10-20 Rotary drill bit for drilling through sticky formations

Publications (2)

Publication Number Publication Date
CA2001178A1 true CA2001178A1 (en) 1990-04-20
CA2001178C CA2001178C (en) 2004-03-16

Family

ID=10645490

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002001178A Expired - Fee Related CA2001178C (en) 1988-10-20 1989-10-20 Rotary drill bit for drilling through sticky formations

Country Status (8)

Country Link
US (1) US5197554A (en)
EP (1) EP0365100B1 (en)
CA (1) CA2001178C (en)
DE (1) DE68912061T2 (en)
DK (1) DK170866B1 (en)
ES (1) ES2048828T3 (en)
GB (1) GB8824546D0 (en)
NO (1) NO180551C (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5803196A (en) * 1996-05-31 1998-09-08 Diamond Products International Stabilizing drill bit
US6125947A (en) * 1997-09-19 2000-10-03 Baker Hughes Incorporated Earth-boring drill bits with enhanced formation cuttings removal features and methods of drilling
US6302223B1 (en) 1999-10-06 2001-10-16 Baker Hughes Incorporated Rotary drag bit with enhanced hydraulic and stabilization characteristics
US8020639B2 (en) * 2008-12-22 2011-09-20 Baker Hughes Incorporated Cutting removal system for PDC drill bits
US8517124B2 (en) * 2009-12-01 2013-08-27 Northbasin Energy Services Inc. PDC drill bit with flute design for better bit cleaning
CN108945640B (en) * 2018-07-12 2021-11-12 江苏恒添源新材料科技有限公司 Chalk film coating machine
CN111520079A (en) * 2020-06-23 2020-08-11 西南石油大学 PDC drill bit blade with crown profile offset
CN112324349B (en) * 2020-11-10 2023-10-03 河南四方达超硬材料股份有限公司 Diamond compact and drill bit of multiple plough

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2371489A (en) * 1943-08-09 1945-03-13 Sam P Daniel Drill bit
US3215215A (en) * 1962-08-27 1965-11-02 Exxon Production Research Co Diamond bit
US4397363A (en) * 1980-01-10 1983-08-09 Drilling & Service U.K. Limited Rotary drill bits and method of use
US4554986A (en) * 1983-07-05 1985-11-26 Reed Rock Bit Company Rotary drill bit having drag cutting elements
US4655303A (en) * 1985-11-22 1987-04-07 Amoco Corporation Drill bit
GB2185506B (en) * 1986-01-21 1989-03-30 Shell Int Research Rotary drill bit
US4696354A (en) * 1986-06-30 1987-09-29 Hughes Tool Company - Usa Drilling bit with full release void areas
GB8628168D0 (en) * 1986-11-22 1986-12-31 Nl Petroleum Prod Rotary drill bits
US4794994A (en) * 1987-03-26 1989-01-03 Reed Tool Company Drag drill bit having improved flow of drilling fluid
EP0295045A3 (en) * 1987-06-09 1989-10-25 Reed Tool Company Rotary drag bit having scouring nozzles

Also Published As

Publication number Publication date
NO180551C (en) 1997-05-07
CA2001178C (en) 2004-03-16
DK170866B1 (en) 1996-02-19
DK519489A (en) 1990-04-21
EP0365100A3 (en) 1991-04-03
DE68912061D1 (en) 1994-02-17
NO180551B (en) 1997-01-27
NO894176L (en) 1990-04-23
EP0365100A2 (en) 1990-04-25
ES2048828T3 (en) 1994-04-01
GB8824546D0 (en) 1988-11-23
DE68912061T2 (en) 1994-04-28
NO894176D0 (en) 1989-10-19
US5197554A (en) 1993-03-30
DK519489D0 (en) 1989-10-19
EP0365100B1 (en) 1994-01-05

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed