Patent US5147001A successfully refreshed from Google Patents.
US5147001A
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Drill bit cutting array having discontinuities therein
Assignee: Saint Gobain Abrasives Inc
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Filing: 1991-05-28
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Granted: 1992-09-15
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Expires: 2011-05-28
Abstract
Abstract The present invention comprises a cutting structure for earth boring drill bits and a bit including at least one such structure comprising a substantially planar array of cutting elements arranged in substantially contiguous mutual proximity, the array incorporating at least one discontinuity therein dividing it into a plurality of sub-arrays.
Inventors
- 👤 Jacob Chow
- 👤 Ralph M. Horton
- 👤 Mark L. Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:18
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/54; E21B10/48; E21B10/485
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
92 words
A drill bit for drilling a subterranean formation, including at least one substantially planar cutting face disposed at an acute angle to the longitudinal axis of said drill bit, facing generally in the direction of the bit rotation and comprised of a plurality of discrete cutting elements, said substantially planar cutting face incorporating at least one discontinuity therein substantially dividing said substantially planar cutting face into a plurality of laterally adjacent segments, each of said laterally adjacent segments including a plurality of said discrete cutting elements in substantially contiguous mutual lateral proximity.
Claim 2
Dependent Claim
92 words
A drill bit for drilling a subterranean formation, including at least one substantially planar cutting face disposed at an acute angle to the longitudinal axis of said drill bit, facing generally in the direction of the bit rotation and comprised of a plurality of discrete cutting elements, said substantially planar cutting face incorporating at least one discontinuity therein substantially dividing said substantially planar cutting face into a plurality of laterally adjacent segments, each of said laterally adjacent segments including a plurality of said discrete cutting elements in substantially contiguous mutual lateral proximity.
Claim 3
Dependent Claim
15 words
The drill bit of claim 1, wherein said at least one discontinuity is substantially linear.
Claim 4
Dependent Claim
20 words
The drill bit of claim 2, wherein said at least one discontinuity comprises a plurality of substantially linear, intersecting discontinuities.
Claim 5
Dependent Claim
24 words
The drill bit of claim 2, wherein said at least one discontinuity is aligned substantially parallel to the longitudinal axis of said drill bit.
Claim 6
Dependent Claim
26 words
The drill bit of claim 2, further including at least a second substantially linear discontinuity oriented substantially perpendicularly to said at least one substantially linear discontinuity.
Claim 7
Dependent Claim
31 words
The drill bit of claim 1, wherein said at least one discontinuity comprises a plurality of substantially linear discontinuities oriented at acute angles to the longitudinal axis of said drill bit.
Claim 8
Dependent Claim
16 words
The drill bit of claim 6, wherein at least two of said plurality of discontinuities intersect.
Claim 9
Dependent Claim
41 words
The drill bit of claim 1, wherein said cutting face is secured in a volume of matrix material supporting structure, and said at least one discontinuity comprises matrix material extending between and dividing said cutting face into said plurality of segments.
Claim 10
Dependent Claim
32 words
The drill bit of claim 1, wherein said at least one discontinuity is defined by the offset of said segments from one another in the direction of rotation of said drill bit.
Claim 11
Dependent Claim
15 words
The drill bit of claim 9, wherein said at least one discontinuity is substantially linear.
Claim 12
Dependent Claim
19 words
The drill bit of claim 9, further including at least a second substantially linear discontinuity intersecting said first discontinuity.
Claim 13
Dependent Claim
24 words
The drill bit of claim 9, wherein said at least one discontinuity is aligned substantially parallel to the longitudinal axis of said drill bit.
Claim 14
Dependent Claim
26 words
The drill bit of claim 12, further including at least a second substantially linear discontinuity oriented substantially perpendicularly to said at least one substantially linear discontinuity.
Claim 15
Dependent Claim
59 words
The drill bit of claim 9, wherein said at least one discontinuity comprises a plurality of substantially linear discontinuities oriented at acute angles to the longitudinal axis of said drill bit, at least one of said discontinuities being defined by the offset of at least two segments from one another in the direction of rotation of said drill bit.
Claim 16
Dependent Claim
16 words
The drill bit of claim 14, wherein at least two of said plurality of discontinuities intersect.
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) | 1995-09-15 | 1996-03-16 | 1996-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-09-15 | 2000-03-16 | 2000-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-09-15 | 2004-03-16 | 2004-09-15 | $7700.00 | Window Closed / Lapsed |