Patent US4710036A successfully refreshed from Google Patents.
US4710036A
Expired / Lapsed
US
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Bearing assembly
Assignee: Halliburton Co
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Filing: 1986-03-20
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Granted: 1987-12-01
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Expires: 2006-03-20
Abstract
Abstract A unitary sleeve mounts both thrust and radial bearings, the radial bearing being fabricated in a recessed area on an elongated extension and the thrust bearing being mounted in a thrust head at one end of the extension.
Inventors
- 👤 Bela Geczy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:46
CPC Classifications
F; F16; F16C; F16C17/00; F16C17/10; E; E21; E21B; E21B4/00; E21B4/003; F16C33/00; F16C33/02; F16C33/04; F16C33/26; F16C2352/00
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
122 words
In a downhole earth boring motor, apparatus comprising: a drive shaft; a generally cylindrical unitary bearing sleeve having an elongated recessed area on its outer surface and an integrally formed thrust head at one end thereof; a radial bearing comprising tungsten carbide chips in a copper base infiltrant bonded to said sleeve in said elongated recesssed area; a plurality of radially disposed cylindrical openings in said thrust head for mounting thrust bearing elements; a plurality of cylindrical diamond faced thrust bearing elements, one mounted in each of said openings; an eccentric interior locking ring means on said unitary sleeve; and means on said drive shaft cooperating with said interior locking ring means for locking said unitary bearing sleeve to said drive shaft.
Claim 2
Dependent Claim
122 words
In a downhole earth boring motor, apparatus comprising: a drive shaft; a generally cylindrical unitary bearing sleeve having an elongated recessed area on its outer surface and an integrally formed thrust head at one end thereof; a radial bearing comprising tungsten carbide chips in a copper base infiltrant bonded to said sleeve in said elongated recesssed area; a plurality of radially disposed cylindrical openings in said thrust head for mounting thrust bearing elements; a plurality of cylindrical diamond faced thrust bearing elements, one mounted in each of said openings; an eccentric interior locking ring means on said unitary sleeve; and means on said drive shaft cooperating with said interior locking ring means for locking said unitary bearing sleeve to said drive shaft.
Claim 3
Dependent Claim
18 words
The bearing assembly of claim 1 wherein said diamond faced thrust bearing inserts comprise polycrystalline diamond faced inserts.
Claim 4
Dependent Claim
15 words
The bearing assembly of claim 2 further including an annular groove on said thrust head.
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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) | 1990-11-30 | 1991-06-01 | 1991-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-11-30 | 1995-06-01 | 1995-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-11-30 | 1999-06-01 | 1999-12-01 | $7700.00 | Window Closed / Lapsed |