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SE9800295L - Roll cone drill bit with improvements in cutting element placement and material for optimizing cutting work at the corner of the borehole - Google Patents

Roll cone drill bit with improvements in cutting element placement and material for optimizing cutting work at the corner of the borehole

Info

Publication number
SE9800295L
SE9800295L SE9800295A SE9800295A SE9800295L SE 9800295 L SE9800295 L SE 9800295L SE 9800295 A SE9800295 A SE 9800295A SE 9800295 A SE9800295 A SE 9800295A SE 9800295 L SE9800295 L SE 9800295L
Authority
SE
Sweden
Prior art keywords
cutter elements
cutting
experiencing
bottom hole
duty
Prior art date
Application number
SE9800295A
Other languages
Unknown language ( )
Swedish (sv)
Other versions
SE9800295D0 (en
Inventor
Gary Ray Portwood
James Carl Minikus
Dennis Cisneros
Gary Edward Garcia
Per Ivar Nese
Chris Edward Cathorne
Original Assignee
Smith International
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 US08/630,517 external-priority patent/US6390210B1/en
Application filed by Smith International filed Critical Smith International
Publication of SE9800295D0 publication Critical patent/SE9800295D0/en
Publication of SE9800295L publication Critical patent/SE9800295L/en

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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/50—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type
    • E21B10/52—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of roller type with chisel- or button-type inserts
    • 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

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)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

A rolling cone bit (10) includes a cone cutter (14, 15, 16) having a pair of adjacent rows of cutter elements (70, 80) that are positioned so as to divide the sidewall (5) and bottom hole (7) duty. The wear resistance, hardness and toughness of the cutter elements (70, 80) in the adjacent rows are optimized depending upon the type of cutting the respective rows perform. In most applications, the cutter elements (70) experiencing the sidewall cutting will have cutting surfaces that are more resistant or harder than the cutting surfaces of the cutter elements (80) in the rows experiencing more bottom hole duty. Likewise, the cutter elements (80) exposed to the bottom hole duty will generally be tougher than those (70) experiencing substantial sidewall cutting. The material enhancements include varying the grades of tungsten carbide used in the cutter elements (70, 80) and by selectively employing layers of superhard abrasives, such as PCD or PCBN. The cutter elements (70, 80) may be either inserts or steel teeth.
SE9800295A 1996-04-10 1998-02-02 Roll cone drill bit with improvements in cutting element placement and material for optimizing cutting work at the corner of the borehole SE9800295L (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/630,517 US6390210B1 (en) 1996-04-10 1996-04-10 Rolling cone bit with gage and off-gage cutter elements positioned to separate sidewall and bottom hole cutting duty
US08/667,758 US5833020A (en) 1996-04-10 1996-06-21 Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty
PCT/US1997/005948 WO1997038205A1 (en) 1996-04-10 1997-04-10 Rolling cone bit with enhancements in cutter element placement and materials to optimize borehole corner cutting duty

Publications (2)

Publication Number Publication Date
SE9800295D0 SE9800295D0 (en) 1998-02-02
SE9800295L true SE9800295L (en) 1998-02-10

Family

ID=27091174

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9800295A SE9800295L (en) 1996-04-10 1998-02-02 Roll cone drill bit with improvements in cutting element placement and material for optimizing cutting work at the corner of the borehole

Country Status (5)

Country Link
AU (1) AU2725997A (en)
CA (1) CA2228156C (en)
GB (1) GB2319549B (en)
SE (1) SE9800295L (en)
WO (1) WO1997038205A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5979575A (en) * 1998-06-25 1999-11-09 Baker Hughes Incorporated Hybrid rock bit
US6345673B1 (en) * 1998-11-20 2002-02-12 Smith International, Inc. High offset bits with super-abrasive cutters
GB2378725B (en) * 1998-11-20 2003-06-11 Smith International Earth boring bit
GB2362905B (en) * 2000-05-18 2004-09-15 Smith International Earth-boring bit

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5353885A (en) * 1991-05-01 1994-10-11 Smith International, Inc. Rock bit
US5542485A (en) * 1993-07-08 1996-08-06 Baker Hughes Incorporated Earth-boring bit with improved cutting structure

Also Published As

Publication number Publication date
WO1997038205A1 (en) 1997-10-16
GB2319549A (en) 1998-05-27
SE9800295D0 (en) 1998-02-02
AU2725997A (en) 1997-10-29
GB2319549B (en) 2000-09-06
CA2228156A1 (en) 1997-10-16
GB9802230D0 (en) 1998-04-01
CA2228156C (en) 2006-08-22

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