GB2386631B - Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability - Google Patents

Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability

Info

Publication number
GB2386631B
GB2386631B GB0312614A GB0312614A GB2386631B GB 2386631 B GB2386631 B GB 2386631B GB 0312614 A GB0312614 A GB 0312614A GB 0312614 A GB0312614 A GB 0312614A GB 2386631 B GB2386631 B GB 2386631B
Authority
GB
United Kingdom
Prior art keywords
drill
centered
out capability
directional stability
drill bit
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 - Fee Related
Application number
GB0312614A
Other versions
GB2386631A (en
GB0312614D0 (en
Inventor
Timothy Paul Beaton
Carl Hoffmaster
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.)
Smith International Inc
Original Assignee
Smith International Inc
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 US09/874,922 external-priority patent/US6659207B2/en
Application filed by Smith International Inc filed Critical Smith International Inc
Publication of GB0312614D0 publication Critical patent/GB0312614D0/en
Publication of GB2386631A publication Critical patent/GB2386631A/en
Application granted granted Critical
Publication of GB2386631B publication Critical patent/GB2386631B/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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • 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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • 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
    • E21B10/42—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits
    • E21B10/43—Rotary drag type drill bits with teeth, blades or like cutting elements, e.g. fork-type bits, fish tail bits characterised by the arrangement of teeth or other 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
    • 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
GB0312614A 2001-06-05 2002-05-29 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability Expired - Fee Related GB2386631B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/874,922 US6659207B2 (en) 1999-06-30 2001-06-05 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability
GB0212389A GB2376251B (en) 2001-06-05 2002-05-29 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability

Publications (3)

Publication Number Publication Date
GB0312614D0 GB0312614D0 (en) 2003-07-09
GB2386631A GB2386631A (en) 2003-09-24
GB2386631B true GB2386631B (en) 2004-01-07

Family

ID=27767109

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0312613A Expired - Fee Related GB2386630B (en) 2001-06-05 2002-05-29 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability
GB0312614A Expired - Fee Related GB2386631B (en) 2001-06-05 2002-05-29 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB0312613A Expired - Fee Related GB2386630B (en) 2001-06-05 2002-05-29 Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability

Country Status (1)

Country Link
GB (2) GB2386630B (en)

Also Published As

Publication number Publication date
GB2386631A (en) 2003-09-24
GB2386630B (en) 2004-01-07
GB0312614D0 (en) 2003-07-09
GB2386630A (en) 2003-09-24
GB0312613D0 (en) 2003-07-09

Similar Documents

Publication Publication Date Title
GB2376251B (en) Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability
GB2368360B (en) Drill bit
GB2364340B (en) Drill bit
GB0125685D0 (en) Drilling wells and drilling fluids
GB2364079B (en) Drill bits
NO20020594L (en) drill bit
GB2358653B (en) Bit for directional drilling
AU2002351326A8 (en) Casing while drilling
GB2375123B (en) Downhole impact drilling
GB2362905B (en) Earth-boring bit
GB2371573A9 (en) Drill bit construction for particular use with directional drilling
PL366519A1 (en) Drill bit
DE50212781D1 (en) drill bit
GB2383059B (en) Downhole percussion drills
ZA200210052B (en) Rock core drill bit.
ATE287024T1 (en) DRILL BIT
HUP0201313A3 (en) Rock drill
GB2386630B (en) Bi-centered drill bit having enhanced casing drill-out capability and improved directional stability
EG22664A (en) Drill bit
NO20014799D0 (en) Drill bit
GB2399373B (en) Earth-boring bit
GB0018309D0 (en) Casing drilling bit
AU4896401A (en) Rock drilling rig
GB2402688B (en) Drill bit
CA94253S (en) Drill bit

Legal Events

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

Effective date: 20150529