GB2344842A - Drill bit - Google Patents

Drill bit

Info

Publication number
GB2344842A
GB2344842A GB0003248A GB0003248A GB2344842A GB 2344842 A GB2344842 A GB 2344842A GB 0003248 A GB0003248 A GB 0003248A GB 0003248 A GB0003248 A GB 0003248A GB 2344842 A GB2344842 A GB 2344842A
Authority
GB
United Kingdom
Prior art keywords
cutting
drill bit
shearing
borehole
cut
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
GB0003248A
Other versions
GB0003248D0 (en
GB2344842B (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 GB0003248D0 publication Critical patent/GB0003248D0/en
Publication of GB2344842A publication Critical patent/GB2344842A/en
Application granted granted Critical
Publication of GB2344842B publication Critical patent/GB2344842B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E21B10/08—Roller bits
    • E21B10/16—Roller bits characterised by tooth form or arrangement
    • 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
    • E21B10/08—Roller bits
    • E21B10/12—Roller bits with discs cutters

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)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Holo Graphy (AREA)
  • Surgical Instruments (AREA)

Abstract

A rotary drill bit for drilling a borehole in an earth formation is provided. The drill bit comprises a plurality of cutting elements (7, 9) arranged to cut a plurality of substantially circular, radially spaced cuts (22, 24, 26) into the bottom of the borehole, the cutting elements including at least one cutting/shearing element (7), each cutting/shearing element being arranged so as to cut into the bottom of the borehole at an angular interval behind another one of said cutting elements (9). A body of rock material (28) is defined between the trajectories of the cuts created by the cutting/shearing element and said other cutting element. The cutting/shearing element is provided with means for shearing-off said body of rock material in the direction of the cut created by said other cutting element.
GB0003248A 1997-08-28 1998-08-28 Drill bit Expired - Fee Related GB2344842B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP97306602 1997-08-28
PCT/EP1998/005703 WO1999011900A1 (en) 1997-08-28 1998-08-28 Drill bit

Publications (3)

Publication Number Publication Date
GB0003248D0 GB0003248D0 (en) 2000-04-05
GB2344842A true GB2344842A (en) 2000-06-21
GB2344842B GB2344842B (en) 2001-11-28

Family

ID=8229483

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0003248A Expired - Fee Related GB2344842B (en) 1997-08-28 1998-08-28 Drill bit

Country Status (12)

Country Link
CN (1) CN1098400C (en)
AR (1) AR016883A1 (en)
AU (1) AU727657B2 (en)
BR (1) BR9811389A (en)
CA (1) CA2300158A1 (en)
EG (1) EG21701A (en)
GB (1) GB2344842B (en)
ID (1) ID24483A (en)
NO (1) NO318151B1 (en)
OA (1) OA11327A (en)
RU (1) RU2206701C2 (en)
WO (1) WO1999011900A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EG22664A (en) 2000-09-08 2003-05-31 Shell Int Research Drill bit
CN102747960A (en) * 2012-07-11 2012-10-24 江汉石油钻头股份有限公司 Hybrid drill bit
CN112557092B (en) * 2020-12-29 2022-08-09 中国原子能科学研究院 Sampling device

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014433A (en) * 1962-10-23 1965-12-22 Continental Oil Co Apparatus for earth boring
GB1082690A (en) * 1963-12-09 1967-09-06 Continental Oil Co Apparatus for earth boring
DE3339675A1 (en) * 1982-12-28 1984-07-12 Sumitomo Metal Mining Co. Ltd., Tokyo Drilling tool for earth bores
US5111894A (en) * 1990-08-23 1992-05-12 Sybil J. Williams Uninterrupted drill bit
US5311958A (en) * 1992-09-23 1994-05-17 Baker Hughes Incorporated Earth-boring bit with an advantageous cutting structure
GB2281330A (en) * 1993-08-24 1995-03-01 Smith International Core cutting rock bit

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US511894A (en) * 1894-01-02 Display-case

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1014433A (en) * 1962-10-23 1965-12-22 Continental Oil Co Apparatus for earth boring
GB1082690A (en) * 1963-12-09 1967-09-06 Continental Oil Co Apparatus for earth boring
DE3339675A1 (en) * 1982-12-28 1984-07-12 Sumitomo Metal Mining Co. Ltd., Tokyo Drilling tool for earth bores
US5111894A (en) * 1990-08-23 1992-05-12 Sybil J. Williams Uninterrupted drill bit
US5311958A (en) * 1992-09-23 1994-05-17 Baker Hughes Incorporated Earth-boring bit with an advantageous cutting structure
GB2281330A (en) * 1993-08-24 1995-03-01 Smith International Core cutting rock bit

Also Published As

Publication number Publication date
BR9811389A (en) 2000-08-29
WO1999011900A1 (en) 1999-03-11
ID24483A (en) 2000-07-20
RU2206701C2 (en) 2003-06-20
AU727657B2 (en) 2000-12-21
EG21701A (en) 2002-02-27
AU9537898A (en) 1999-03-22
CN1098400C (en) 2003-01-08
GB0003248D0 (en) 2000-04-05
AR016883A1 (en) 2001-08-01
GB2344842B (en) 2001-11-28
NO20000938L (en) 2000-02-25
CN1268991A (en) 2000-10-04
NO318151B1 (en) 2005-02-07
NO20000938D0 (en) 2000-02-25
OA11327A (en) 2003-12-09
CA2300158A1 (en) 1999-03-11

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Legal Events

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

Effective date: 20090828