GB8711255D0 - Rotary drill bits - Google Patents

Rotary drill bits

Info

Publication number
GB8711255D0
GB8711255D0 GB878711255A GB8711255A GB8711255D0 GB 8711255 D0 GB8711255 D0 GB 8711255D0 GB 878711255 A GB878711255 A GB 878711255A GB 8711255 A GB8711255 A GB 8711255A GB 8711255 D0 GB8711255 D0 GB 8711255D0
Authority
GB
United Kingdom
Prior art keywords
drill bits
rotary drill
rotary
bits
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.)
Pending
Application number
GB878711255A
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.)
NL PETROLEUM PROD
Nl Petroleum Products Ltd
Original Assignee
NL PETROLEUM PROD
Nl Petroleum Products Ltd
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 NL PETROLEUM PROD, Nl Petroleum Products Ltd filed Critical NL PETROLEUM PROD
Priority to GB878711255A priority Critical patent/GB8711255D0/en
Publication of GB8711255D0 publication Critical patent/GB8711255D0/en
Application status is Pending legal-status Critical

Links

GB878711255A 1987-05-13 1987-05-13 Rotary drill bits Pending GB8711255D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB878711255A GB8711255D0 (en) 1987-05-13 1987-05-13 Rotary drill bits

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB878711255A GB8711255D0 (en) 1987-05-13 1987-05-13 Rotary drill bits
EP88304325A EP0291314A3 (en) 1987-05-13 1988-05-12 Cutting structure and rotary drill bit comprising such a structure
GB08811390A GB2204625A (en) 1987-05-13 1988-05-13 Improvements in or relating to rotary drill bits

Publications (1)

Publication Number Publication Date
GB8711255D0 true GB8711255D0 (en) 1987-06-17

Family

ID=10617240

Family Applications (2)

Application Number Title Priority Date Filing Date
GB878711255A Pending GB8711255D0 (en) 1987-05-13 1987-05-13 Rotary drill bits
GB08811390A Withdrawn GB2204625A (en) 1987-05-13 1988-05-13 Improvements in or relating to rotary drill bits

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB08811390A Withdrawn GB2204625A (en) 1987-05-13 1988-05-13 Improvements in or relating to rotary drill bits

Country Status (2)

Country Link
EP (1) EP0291314A3 (en)
GB (2) GB8711255D0 (en)

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4981184A (en) * 1988-11-21 1991-01-01 Smith International, Inc. Diamond drag bit for soft formations
US5314033A (en) * 1992-02-18 1994-05-24 Baker Hughes Incorporated Drill bit having combined positive and negative or neutral rake cutters
GB2273946B (en) * 1992-12-31 1996-10-09 Camco Drilling Group Ltd Improvements in or relating to rotary drill bits
GB2274474B (en) * 1993-01-21 1996-07-31 Camco Drilling Group Ltd Improvements in or relating to cutter assemblies for rotary drill bits
FR2735522B1 (en) * 1995-06-16 1997-09-05 Total Sa Cutting monobloc drilling tool
US5667028A (en) * 1995-08-22 1997-09-16 Smith International, Inc. Multiple diamond layer polycrystalline diamond composite cutters
BE1010801A3 (en) * 1996-12-16 1999-02-02 Dresser Ind Drilling tool and / or core.
US5979578A (en) * 1997-06-05 1999-11-09 Smith International, Inc. Multi-layer, multi-grade multiple cutting surface PDC cutter
US6510906B1 (en) * 1999-11-29 2003-01-28 Baker Hughes Incorporated Impregnated bit with PDC cutters in cone area
US6843333B2 (en) 1999-11-29 2005-01-18 Baker Hughes Incorporated Impregnated rotary drag bit
US7726420B2 (en) 2004-04-30 2010-06-01 Smith International, Inc. Cutter having shaped working surface with varying edge chamfer
GB2438319B (en) * 2005-02-08 2009-03-04 Smith International Thermally stable polycrystalline diamond cutting elements and bits incorporating the same
US8002859B2 (en) 2007-02-06 2011-08-23 Smith International, Inc. Manufacture of thermally stable cutting elements
US7942219B2 (en) 2007-03-21 2011-05-17 Smith International, Inc. Polycrystalline diamond constructions having improved thermal stability
US7730976B2 (en) 2007-10-31 2010-06-08 Baker Hughes Incorporated Impregnated rotary drag bit and related methods
US9297211B2 (en) 2007-12-17 2016-03-29 Smith International, Inc. Polycrystalline diamond construction with controlled gradient metal content
US8083012B2 (en) 2008-10-03 2011-12-27 Smith International, Inc. Diamond bonded construction with thermally stable region
GB2481957B (en) * 2009-05-06 2014-10-15 Smith International Methods of making and attaching tsp material for forming cutting elements, cutting elements having such tsp material and bits incorporating such cutting
WO2012149120A2 (en) 2011-04-26 2012-11-01 Smith International, Inc. Methods of attaching rolling cutters in fixed cutter bits using sleeve, compression spring, and/or pin(s)/ball(s)
WO2012149086A2 (en) 2011-04-26 2012-11-01 Smith International, Inc. Polycrystalline diamond compact cutters with conic shaped end

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106973A (en) * 1960-09-26 1963-10-15 Christensen Diamond Prod Co Rotary drill bits
US4148368A (en) * 1976-09-27 1979-04-10 Smith International, Inc. Rock bit with wear resistant inserts
US4339009A (en) * 1979-03-27 1982-07-13 Busby Donald W Button assembly for rotary rock cutters
ZA8006249B (en) * 1979-11-19 1982-01-27 Gen Electric Compacts for diamond drill and saw applications
US4660659A (en) * 1983-02-22 1987-04-28 Nl Industries, Inc. Drag type drill bit
US4529047A (en) * 1983-02-24 1985-07-16 Norton Christensen, Inc. Cutting tooth and a rotating bit having a fully exposed polycrystalline diamond element
US4491188A (en) * 1983-03-07 1985-01-01 Norton Christensen, Inc. Diamond cutting element in a rotating bit
US4499959A (en) * 1983-03-14 1985-02-19 Christensen, Inc. Tooth configuration for an earth boring bit
GB2138864B (en) * 1983-04-28 1986-07-30 Sumitomo Metal Mining Co Roller drill bits
EP0156235B1 (en) * 1984-03-26 1989-05-24 Eastman Christensen Company Multi-component cutting element using consolidated rod-like polycrystalline diamond
GB8418481D0 (en) * 1984-07-19 1984-08-22 Nl Petroleum Prod Rotary drill bits
US4646857A (en) * 1985-10-24 1987-03-03 Reed Tool Company Means to secure cutting elements on drag type drill bits
GB8612012D0 (en) * 1986-05-16 1986-06-25 Nl Petroleum Prod Rotary drill bits

Also Published As

Publication number Publication date
GB8811390D0 (en) 1988-06-15
EP0291314A3 (en) 1989-09-20
GB2204625A (en) 1988-11-16
EP0291314A2 (en) 1988-11-17

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