CA2132283A1 - Drill Bit Inserts Enhanced with Polycrystalline Diamond - Google Patents

Drill Bit Inserts Enhanced with Polycrystalline Diamond

Info

Publication number
CA2132283A1
CA2132283A1 CA2132283A CA2132283A CA2132283A1 CA 2132283 A1 CA2132283 A1 CA 2132283A1 CA 2132283 A CA2132283 A CA 2132283A CA 2132283 A CA2132283 A CA 2132283A CA 2132283 A1 CA2132283 A1 CA 2132283A1
Authority
CA
Canada
Prior art keywords
particles
carbide
polycrystalline diamond
carbonitride
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.)
Granted
Application number
CA2132283A
Other languages
French (fr)
Other versions
CA2132283C (en
Inventor
Madapusi K. Keshavan
Monte E. Russell
Dah-Ben Liang
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
Madapusi K. Keshavan
Monte E. Russell
Dah-Ben Liang
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
Application filed by Madapusi K. Keshavan, Monte E. Russell, Dah-Ben Liang, Smith International, Inc. filed Critical Madapusi K. Keshavan
Publication of CA2132283A1 publication Critical patent/CA2132283A1/en
Application granted granted Critical
Publication of CA2132283C publication Critical patent/CA2132283C/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
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts

Abstract

A drill bit has means at one end for connecting the bit to a drill string and a plurality of inserts at the other end for crushing the rock to be drilled.
The inserts have a cemented tungsten carbide body partially embedded in the drill bit and at least two layers at the protruding drilling portion of the insert. The outermost layer contains polycrystalline diamond and particles of carbide or carbonitride of elements selected from the group consisting of W, Ti, Ta, Cr, Mo, Cb, V, Hf and Zr. The remaining layers adjacent the polycrystalline diamond layer are transition layers each comprising a composite containing diamond crystals, particles of tungsten carbide, and particles of titanium carbonitride. The average size of the diamond particles in the polycrystalline diamond layer is greater than the average size of the carbide or carbonitride particles; and the average size of the diamond particles in the transition layers is greater than the average sizes of the carbide and carbonitride particles. in particular, the transition layers contain particles of carbide and/or carbonitride with average grain sizes of less than one micrometer. The outermost layer of polycrystalline diamond extends along at least a portion of the length of the grip portion of the carbide body embedded in the drill bit.
CA002132283A 1993-09-20 1994-09-16 Drill bit inserts enhanced with polycrystalline diamond Expired - Fee Related CA2132283C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/123,715 US5370195A (en) 1993-09-20 1993-09-20 Drill bit inserts enhanced with polycrystalline diamond
US08/123,715 1993-09-20

Publications (2)

Publication Number Publication Date
CA2132283A1 true CA2132283A1 (en) 1995-03-21
CA2132283C CA2132283C (en) 2000-11-21

Family

ID=22410426

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002132283A Expired - Fee Related CA2132283C (en) 1993-09-20 1994-09-16 Drill bit inserts enhanced with polycrystalline diamond

Country Status (8)

Country Link
US (1) US5370195A (en)
JP (1) JP2889824B2 (en)
AU (1) AU672332B2 (en)
CA (1) CA2132283C (en)
GB (1) GB2282833B (en)
IE (1) IE79240B1 (en)
SE (1) SE519421C2 (en)
ZA (1) ZA947185B (en)

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CA2132283C (en) 2000-11-21
IE79240B1 (en) 1998-04-22
JPH07150878A (en) 1995-06-13
SE9403134D0 (en) 1994-09-19
SE519421C2 (en) 2003-02-25
SE9403134L (en) 1995-05-04
AU672332B2 (en) 1996-09-26
AU7410094A (en) 1996-04-18
GB9418454D0 (en) 1994-11-02
IE940713A1 (en) 1995-03-22
GB2282833A (en) 1995-04-19
US5370195A (en) 1994-12-06
JP2889824B2 (en) 1999-05-10
GB2282833B (en) 1997-03-12
ZA947185B (en) 1995-05-12

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