US3747699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diamond bit
Assignee: Shell USA Inc
•
Filing: 1972-03-29
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Granted: 1973-07-24
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Expires: 1992-03-29
Abstract
Abstract In a diamond bit having mud channels formed in the face thereof, a single row of diamonds is arranged along each mud channel. The diamonds are positioned so that the scraping edge of each diamond is between two perpendicularly arranged planes of the diamond and so that one of these planes lies in the wall of the mud channel.
Inventors
- 👤 R Feenstra
- 👤 A Pols
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:33
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
141 words
In a diamond bit for drilling a hole in a subsurface earth formation of the type wherein a single row of diamonds is arranged along one substantially flat side wall of each of a plurality of mud channels which extend through the outer surface of a diamond-carrying bit body hAving a face portion for cutting the bottom of the hole, the improvement which comprises: diamonds having at least two substantially flat outer surfaces which intersect to form a scraping edge; said diamonds being positioned in said diamond-carrying bit body in single rows along the substantially flat mud channel side walls so that said scraping edge is in a scraping position with respect to the hole to be drilled and so that one of said intersecting substantially flat outer surfaces of said diamonds lies in the substantially flat mud channel side wall.
Claim 2
Dependent Claim
141 words
In a diamond bit for drilling a hole in a subsurface earth formation of the type wherein a single row of diamonds is arranged along one substantially flat side wall of each of a plurality of mud channels which extend through the outer surface of a diamond-carrying bit body hAving a face portion for cutting the bottom of the hole, the improvement which comprises: diamonds having at least two substantially flat outer surfaces which intersect to form a scraping edge; said diamonds being positioned in said diamond-carrying bit body in single rows along the substantially flat mud channel side walls so that said scraping edge is in a scraping position with respect to the hole to be drilled and so that one of said intersecting substantially flat outer surfaces of said diamonds lies in the substantially flat mud channel side wall.
Claim 3
Dependent Claim
29 words
The diamond bit of claim 1 wherein the scraping edge of diamonds positioned in the face portion of the bit lies in the outer surface of the bit body.
Claim 4
Dependent Claim
78 words
The diamond bit of claim 1 wherein at least a portion of the second of said intersecting substantially flat outer surfaces of said diamonds is positioned within said bit body adjacent said bit body outer surface; said second of said intersecting flat outer surfaces intersecting said bit body outer surface at a relief angle different from zero of the bit body along the line of intersection of said scraping edge and sand outer surface of said bit body.
Claim 5
Dependent Claim
28 words
The diamond bit of claim 1 wherein at least some of said diamonds having at least two substantially flat outer surfaces have at least one triangular outer surface.
Claim 6
Dependent Claim
29 words
The diamond bit of claim 1 wherein at least some of said diamonds have at least two substantially flat outer surfaces which perpendicularly intersect to form a scraping edge.
Claim 7
Dependent Claim
28 words
The diamond bit of claim 5 wherein at least some of said diamonds having outer surfaces which perpendicularly intersect are diamonds having the shape of a quarter sphere.
Claim 8
Dependent Claim
22 words
The diamond bit of claim 5 wherein at least some of said diamonds having outer surfaces which perpendicularly intersect are cube shaped.
Claim 9
Dependent Claim
62 words
The diamond bit of claim 7 wherein said bit body and each of said mud channels has a central axis and wherein at least a portion ofthe central axis of at least some of said mud channels is arranged in a flat plane which is slanted at an angle different from zero with respect to the central axis of the bit body.
Claim 10
Dependent Claim
19 words
The diamond bit of claim 8 wherein the angle different from zero is an angle between 1* and 5*.
References Cited (Backward Citations)
US2371489A
Cited
US2425132A
Cited
US2818233A
Cited
US3027952A
Cited
US3058535A
Cited
US3605923A
Cited
US3640356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |