US4333540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cutter element and cutter for rock drilling
Assignee: General Electric Co
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Filing: 1980-02-11
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Granted: 1982-06-08
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Expires: 2000-02-11
Abstract
Abstract A fixed cutting tool shape for improved rock drilling performance of drag-type rotary bits includes a cemented tungsten carbide cutter body and a plow-shaped cutter element. In a preferred embodiment, the cutter element is a composite compact of polycrystalline diamond on a cemented tungsten carbide substrate, and defines a generally V-shaped cutter to create a plowing action and direct rock ship flow away from the working surface.
Inventors
- 👤 William H. Daniels
- 👤 John B. Cheatham, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:28
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/46; E21B10/58
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
92 words
An improved drag type oil and rock drill bit having composite compact cutter elements each comprising a polycrystalline layer of diamond cubic boron nitride, wurtzite boron nitride or mixtures thereof bonded to a substrate made of a cemented carbide selected from tantalum, titanium or tungsten carbide, wherein the improvement comprises compact cutting elements having a generally V-shape configuration in which the polycrystalline diamond layer forms the legs of said V-shape, said V-shape defining an included angle of from 60°-90°, to cause a plowing effect and rock chip flow along the cutter elements.
Claim 2
Dependent Claim
92 words
An improved drag type oil and rock drill bit having composite compact cutter elements each comprising a polycrystalline layer of diamond cubic boron nitride, wurtzite boron nitride or mixtures thereof bonded to a substrate made of a cemented carbide selected from tantalum, titanium or tungsten carbide, wherein the improvement comprises compact cutting elements having a generally V-shape configuration in which the polycrystalline diamond layer forms the legs of said V-shape, said V-shape defining an included angle of from 60°-90°, to cause a plowing effect and rock chip flow along the cutter elements.
Claim 3
Dependent Claim
20 words
The improved drill bit as recited in claim 1 wherein the included angle of the V-shaped cutting elements is 75°.
References Cited (Backward Citations)
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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) | 1985-06-07 | 1985-12-07 | 1986-06-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-07 | 1989-12-07 | 1990-06-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-07 | 1993-12-07 | 1994-06-08 | $7700.00 | Window Closed / Lapsed |