Patent US4592433A successfully refreshed from Google Patents.
US4592433A
Expired / Lapsed
US
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Cutting blank with diamond strips in grooves
Assignee: Diamant Boart Stratabit USA Inc
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Filing: 1984-10-04
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Granted: 1986-06-03
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Expires: 2004-10-04
Abstract
Abstract A cutting blank, preferably for use on a drill bit for cutting through earth formations, comprises a substrate formed of a hard material and including a cutting surface. A plurality of shallow grooves are formed in the cutting surface and each groove includes opposing side and base portions. Strips of a diamond substance are disposed in the grooves and are adhered to the side and base portions and include a cutting face exposed adjacent to the cutting surface of the substrate. The strips may be arranged in various patterns and may be in non-intersecting relationship, or intersecting relationship. The grooves may include undercut portions to more positively anchor the strips to the substrate. The cutting blank is preferably bonded to a stud, with the stud being mounted in a rotary drill bit.
Inventors
- 👤 Mahlon D. Dennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:03
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5676
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
81 words
A cutting blank comprising: a substrate formed of cemented carbide and including a cutting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions formed of said cemented carbide, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting face.
Claim 2
Dependent Claim
81 words
A cutting blank comprising: a substrate formed of cemented carbide and including a cutting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions formed of said cemented carbide, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting face.
Claim 3
Dependent Claim
18 words
A cutting blank according to claim 1, wherein said strips extend toward a peripheral edge of said substrate.
Claim 4
Dependent Claim
18 words
A cutting blank according to claim 2, wherein said strips extend all the way to said peripheral edge.
Claim 5
Dependent Claim
12 words
A cutting blank according to claim 1, wherein said strips are interconnected.
Claim 6
Dependent Claim
16 words
A cutting blank according to claim 4, wherein said strips are interconnected at their outermost ends.
Claim 7
Dependent Claim
16 words
A cutting blank according to claim 1, wherein at least one of said strips is curvalinear.
Claim 8
Dependent Claim
48 words
A cutting blank according to claim 1, wherein said strips include two sets of strips, each set extending toward a different section of said peripheral edge, the strips of one set being spaced from the strips of the other set by a central region of said cutting surface.
Claim 9
Dependent Claim
16 words
A cutting blank according to claim 1, wherein said strips are interconnected to form a chevron.
Claim 10
Dependent Claim
14 words
A cutting blank according to claim 1, wherein said strips form an undulating pattern.
Claim 11
Dependent Claim
17 words
A cutting blank according to claim 1, wherein said diamond substance comprises a thermally stable polycrystalline diamond.
Claim 12
Dependent Claim
17 words
A cutting blank according to claim 1, wherein said diamond substance comprises a thermally unstable polycrystalline diamond.
Claim 13
Dependent Claim
13 words
A cutting blank according to claim 1, wherein said grooves include undercut portions.
Claim 14
Dependent Claim
22 words
A cutting blank according to claim 1, wherein said grooves have a depth in the range of from 0.080 to 0.135 inches.
Claim 15
Dependent Claim
22 words
A cutting blank according to claim 13, wherein said grooves have a width in the range of from 0.02 to 0.16 inches.
Claim 16
Dependent Claim
15 words
A cutting blank according to claim 1, wherein said substrate is of one-piece integral construction.
Claim 17
Dependent Claim
16 words
A cutting blank according to claim 1, wherein said substrate is formed of a cemented carbide.
Claim 18
Dependent Claim
16 words
A cutting blank according to claim 1, wherein said diamond substance is sintered-in-place in said grooves.
Claim 19
Dependent Claim
16 words
A cutting blank according to claim 1, wherein said diamond substance is brazed in said grooves.
Claim 20
Dependent Claim
115 words
A cutting element for cutting through earth formations, comprising: a stud having an outer end surface, and a cutting blank mounted on said outer end surface and including: a substrate formed of cemented carbide and including a mounting surface bonded to said outer end surface, and a cutting surface disposed opposite said mounting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting surface.
Claim 21
Dependent Claim
115 words
A cutting element for cutting through earth formations, comprising: a stud having an outer end surface, and a cutting blank mounted on said outer end surface and including: a substrate formed of cemented carbide and including a mounting surface bonded to said outer end surface, and a cutting surface disposed opposite said mounting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting surface.
Claim 22
Dependent Claim
113 words
A drill bit comprising: a bit body having a cutting face, a plurality of cutting elements mounted in said cutting face and comprising: a stud having an outer surface, and a cutting blank mounted on said outer surface and including a substrate formed of a hard material and including a cutting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting surface.
Claim 23
Dependent Claim
113 words
A drill bit comprising: a bit body having a cutting face, a plurality of cutting elements mounted in said cutting face and comprising: a stud having an outer surface, and a cutting blank mounted on said outer surface and including a substrate formed of a hard material and including a cutting surface, a plurality of shallow grooves formed in said cutting surface and each including opposing side and base portions, and strips of a diamond substance disposed in respective ones of said grooves and adhered to said side and base portions and extending to said cutting surface of said substrate to define an exposed cutting face lying substantially flush with said cutting surface.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-06-02 | 1989-12-02 | 1990-06-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-02 | 1993-12-02 | 1994-06-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-02 | 1997-12-02 | 1998-06-03 | $7700.00 | Window Closed / Lapsed |