GB2376489B - Bi-centre drill bit - Google Patents

Bi-centre drill bit

Info

Publication number
GB2376489B
GB2376489B GB0213641A GB0213641A GB2376489B GB 2376489 B GB2376489 B GB 2376489B GB 0213641 A GB0213641 A GB 0213641A GB 0213641 A GB0213641 A GB 0213641A GB 2376489 B GB2376489 B GB 2376489B
Authority
GB
United Kingdom
Prior art keywords
drill bit
centre drill
centre
bit
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.)
Expired - Fee Related
Application number
GB0213641A
Other versions
GB0213641D0 (en
GB2376489A (en
Inventor
Timothy Paul Beaton
David K Truax
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 US09/345,688 external-priority patent/US6269893B1/en
Application filed by Smith International Inc filed Critical Smith International Inc
Publication of GB0213641D0 publication Critical patent/GB0213641D0/en
Publication of GB2376489A publication Critical patent/GB2376489A/en
Application granted granted Critical
Publication of GB2376489B publication Critical patent/GB2376489B/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
    • E21B10/26—Drill bits with leading portion, i.e. drill bits with a pilot cutter; Drill bits for enlarging the borehole, e.g. reamers
    • E21B10/265—Bi-center drill bits, i.e. an integral bit and eccentric reamer used to simultaneously drill and underream the hole
GB0213641A 1999-06-30 2000-06-20 Bi-centre drill bit Expired - Fee Related GB2376489B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/345,688 US6269893B1 (en) 1999-06-30 1999-06-30 Bi-centered drill bit having improved drilling stability mud hydraulics and resistance to cutter damage
GB0015128A GB2351513B (en) 1999-06-30 2000-06-20 Bi-center drill bit

Publications (3)

Publication Number Publication Date
GB0213641D0 GB0213641D0 (en) 2002-07-24
GB2376489A GB2376489A (en) 2002-12-18
GB2376489B true GB2376489B (en) 2003-05-28

Family

ID=26244519

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0213641A Expired - Fee Related GB2376489B (en) 1999-06-30 2000-06-20 Bi-centre drill bit
GB0213642A Expired - Fee Related GB2376490B (en) 1999-06-30 2000-06-20 Bi-Centre drill bit

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0213642A Expired - Fee Related GB2376490B (en) 1999-06-30 2000-06-20 Bi-Centre drill bit

Country Status (1)

Country Link
GB (2) GB2376489B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8127863B2 (en) 2007-12-10 2012-03-06 Smith International, Inc. Drill bit having enhanced stabilization features and method of use thereof
GB0820063D0 (en) 2008-11-03 2008-12-10 Reedhycalog Uk Ltd Drilling tool
GB2464194B (en) * 2008-10-09 2012-08-15 Reedhycalog Uk Ltd Drilling tool

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328698A (en) * 1997-08-25 1999-03-03 Smith International Drill bit
GB2330599A (en) * 1997-10-21 1999-04-28 Diamond Products International Improvements in or relating to drill bits
EP1039095A2 (en) * 1999-03-19 2000-09-27 Diamond Products International, Inc. Downhole drill bit

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328698A (en) * 1997-08-25 1999-03-03 Smith International Drill bit
GB2330599A (en) * 1997-10-21 1999-04-28 Diamond Products International Improvements in or relating to drill bits
EP1039095A2 (en) * 1999-03-19 2000-09-27 Diamond Products International, Inc. Downhole drill bit

Also Published As

Publication number Publication date
GB0213641D0 (en) 2002-07-24
GB2376490A (en) 2002-12-18
GB2376490B (en) 2003-05-28
GB0213642D0 (en) 2002-07-24
GB2376489A (en) 2002-12-18

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Legal Events

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

Effective date: 20150620