US4976324A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drill bit having diamond film cutting surface
Assignee: Baker Hughes Holdings LLC
•
Filing: 1989-09-22
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Granted: 1990-12-11
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Expires: 2009-09-22
Abstract
Abstract An improved diamond drill bit is provided which has a diamond film cutting surface. The drill bit comprises a body member and a plurality of cutting members, each including a diamond cutting face formed from a diamond substrate coated with a diamond film.
Inventors
- 👤 Gordon A. Tibbitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:40
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/56; E21B10/567; E21B10/5673
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
43 words
A drill bit for earth boring, comprising: a body member; and a plurality of cutting members disposed on and protruding from the surface of said body member, said cutting members including diamond cutting faces comprising a diamond substrate coated with a diamond film.
Claim 2
Dependent Claim
43 words
A drill bit for earth boring, comprising: a body member; and a plurality of cutting members disposed on and protruding from the surface of said body member, said cutting members including diamond cutting faces comprising a diamond substrate coated with a diamond film.
Claim 3
Dependent Claim
17 words
A drill bit as defined in claim 1 wherein said diamond substrate comprises a polycrystalline diamond compact.
Claim 4
Dependent Claim
18 words
A drill bit as defined in claim 1 wherein said diamond substrate comprises a thermally stable diamond product.
Claim 5
Dependent Claim
18 words
A drill bit as defined in claim 1 wherein said diamond substrate comprises a unitary piece of diamond.
Claim 6
Dependent Claim
18 words
A drill bit as defined in claim 1 wherein said diamond substrate comprises a plurality of diamond pieces.
Claim 7
Dependent Claim
17 words
A drill bit as defined in claim 5 wherein said film covers joints between said diamond pieces.
Claim 8
Dependent Claim
18 words
A drill bit as defined in claim 1 wherein said diamond film is formed by chemical vapor deposition.
Claim 9
Dependent Claim
20 words
A drill bit as defined in claim 1 wherein said diamond film also coats exposed sides of said cutting members.
Claim 10
Dependent Claim
30 words
A cutting member for an earth boring drill bit comprising: a cutting face secured to said supporting structure, said cutting face comprising a diamond substrate coated with a diamond film.
Claim 11
Dependent Claim
30 words
A cutting member for an earth boring drill bit comprising: a cutting face secured to said supporting structure, said cutting face comprising a diamond substrate coated with a diamond film.
Claim 12
Dependent Claim
17 words
A cutting member as defined in claim 9 wherein said diamond substrate comprises a polycrystalline diamond compact.
Claim 13
Dependent Claim
18 words
A cutting member as defined in claim 9 wherein said diamond substrate comprises a thermally stable diamond product.
Claim 14
Dependent Claim
18 words
A cutting member as defined in claim 9 wherein said diamond substrate comprises a unitary piece of diamond.
Claim 15
Dependent Claim
18 words
A cutting member as defined in claim 9 wherein said diamond substrate comprises a plurality of diamond pieces.
Claim 16
Dependent Claim
17 words
A cutting member as defined in claim 13 wherein said film covers joints between said diamond pieces.
Claim 17
Dependent Claim
18 words
A cutting member as defined in claim 9 wherein said diamond film is formed by chemical vapor deposition.
Claim 18
Dependent Claim
20 words
A cutting member as defined in claim 9 wherein said diamond film also coats exposed sides of said cutting members.
Claim 19
Dependent Claim
85 words
A drill bit for drilling a subterranean formation, comprising: a body member secured to a shank for connecting said drill bit to a drill stem; and a plurality of cutting members disposed on and protruding from said body member, at least one of said cutting members including a substantially planar diamond cutting face comprising a diamond substrate coated with a diamond film, said cutting face having a leading cutting edge for engaging said formation substantially comprising said film at the periphery of said cutting face.
Claim 20
Dependent Claim
85 words
A drill bit for drilling a subterranean formation, comprising: a body member secured to a shank for connecting said drill bit to a drill stem; and a plurality of cutting members disposed on and protruding from said body member, at least one of said cutting members including a substantially planar diamond cutting face comprising a diamond substrate coated with a diamond film, said cutting face having a leading cutting edge for engaging said formation substantially comprising said film at the periphery of said cutting face.
Claim 21
Dependent Claim
17 words
A drill bit as defined in claim 17 wherein said diamond substrate comprises a pollycrystalline diamond compact.
Claim 22
Dependent Claim
18 words
A drill bit as defined in claim 17 wherein said diamond substrate comprises a thermally stable diamond product.
Claim 23
Dependent Claim
18 words
A drill bit as defined in claim 17 wherein said diamond substrate comprises a unitary piece of diamond.
Claim 24
Dependent Claim
18 words
A drill bit as defined in claim 17 wherein said diamond substrate comprises a plurality of diamond pieces.
Claim 25
Dependent Claim
17 words
A drill bit as defined in claim 21 wherein said film covers joints between said diamond pieces.
Claim 26
Dependent Claim
18 words
A drill bit as defined in claim 17 wherein said diamond film is formed by chemical vapor deposition.
Claim 27
Dependent Claim
20 words
A drill bit as defined in claim 17 wherein said diamond film also coats exposed sides of said cutting members.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-12-10 | 1994-06-11 | 1994-12-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-12-10 | 1998-06-11 | 1998-12-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-12-10 | 2002-06-11 | 2002-12-11 | $7700.00 | Window Closed / Lapsed |