US4303136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fluid passage formed by diamond insert studs for drag bits
Assignee: Smith International Inc
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Filing: 1979-05-04
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Granted: 1981-12-01
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Expires: 1999-05-04
Abstract
Abstract Diamond drag bits with a multiplicity of individual diamond insert studs standing-off from the face of the bit require fluid over and around each separate insert to cool and clean the stud. An axially aligned fluid passage formed within the insert stud communicates with a fluid-filled chamber formed by the drag bit. The fluid exits the passage in the stud in front of the diamond cutting face of the stud to assure cooling and cleaning of each insert stud inserted in the face of the drag bit.
Inventors
- 👤 Harry N. Ball
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:15
CPC Classifications
E; E21; E21B; E21B10/00; E21B10/60; E21B10/61; E21B10/46; E21B10/56; E21B10/567
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A man-made synthetic diamond insert stud comprising: a substantially cylindrical stud body having a first extended diamond faced cutter end and a second base end, a fluid passage having a first exit end and second entry end formed by said body of said stud, said fluid passage being substantially aligned with the axis of said body, said first exit end of said passage formed by said stud being substantially aligned and flared to diffuse fluid exiting said first exit end over and around said diamond face of said first extended diamond faced cutter end of said stud body.
Claim 2
Dependent Claim
98 words
A man-made synthetic diamond insert stud comprising: a substantially cylindrical stud body having a first extended diamond faced cutter end and a second base end, a fluid passage having a first exit end and second entry end formed by said body of said stud, said fluid passage being substantially aligned with the axis of said body, said first exit end of said passage formed by said stud being substantially aligned and flared to diffuse fluid exiting said first exit end over and around said diamond face of said first extended diamond faced cutter end of said stud body.
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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) | 1984-11-30 | 1985-06-01 | 1985-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-30 | 1989-06-01 | 1989-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-30 | 1993-06-01 | 1993-12-01 | $7700.00 | Window Closed / Lapsed |