Patent US4033640A successfully refreshed from Google Patents.
US4033640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seal bearing apparatus
Assignee: ExxonMobil Upstream Research Co
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Filing: 1976-07-20
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Granted: 1977-07-05
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Expires: 1996-07-20
Abstract
Abstract A liner hanger assembly and method of installation for use in oil and gas well operations having multiple individual hanger units arranged in series for even load distribution. Each individual hanger unit carries a proportional amount of the weight load of a suspended well pipe (casing liner) and has a balanced pressure, sealed bearing which facilitates rotation of the casing liner in the well bore during cementing operations.
Inventors
- 👤 Juan A. Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 20:52
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
107 words
A balanced pressure, sealed bearing apparatus, comprising: a. a plurality of balls; b. an upper hard metallic race; c. a lower hard metallic race; d. an upper shoulder abutting said upper race fabricated of a metal which is softer than said upper race; e. a lower shoulder abutting said lower race fabricated of a metal which is softer than said lower race; f. a seal sleeve closing off and defining a space for sealing lubricant about the interior of said bearing, and g. a lower seal assembly having a plurality of movable seals which are pressure responsive to balance internal bearing pressure with the ambient external pressure.
Claim 2
Dependent Claim
107 words
A balanced pressure, sealed bearing apparatus, comprising: a. a plurality of balls; b. an upper hard metallic race; c. a lower hard metallic race; d. an upper shoulder abutting said upper race fabricated of a metal which is softer than said upper race; e. a lower shoulder abutting said lower race fabricated of a metal which is softer than said lower race; f. a seal sleeve closing off and defining a space for sealing lubricant about the interior of said bearing, and g. a lower seal assembly having a plurality of movable seals which are pressure responsive to balance internal bearing pressure with the ambient external pressure.
Claim 3
Dependent Claim
33 words
The sealed bearing of claim 1 in which said lower seal assembly includes a plurality of spaced apart seals separated by shim sleeves and includes a biasing spring engageable with a hanger cone.
Claim 4
Dependent Claim
20 words
The sealed bearing of claim 1 in which the interior of said bearing is packed with a heat resistant lubricant.
Claim 5
Dependent Claim
137 words
A balanced pressure, sealed bearing apparatus, comprising: a. an upper annular ring bearing plate having a shoulder engageable with a b. lower annular ring bearing plate, the interface surfaces of the upper and lower bearing plates being formed of a resilient material having a low coefficient of friction; c. an upper shoulder abutting said upper bearing plate fabricated of a metal softer than that of said upper bearing plate; d. A lower shoulder abutting said lower bearing plate fabricated of a metal softer than that of said lower bearing plate; e. a seal sleeve closing off and defining a space for sealing lubricant about the interior of said bearing; and f. a lower seal assembly having a plurality of movable seals which are pressure responsive to balance internal bearing pressure with the external ambient well bore pressure.
Claim 6
Dependent Claim
137 words
A balanced pressure, sealed bearing apparatus, comprising: a. an upper annular ring bearing plate having a shoulder engageable with a b. lower annular ring bearing plate, the interface surfaces of the upper and lower bearing plates being formed of a resilient material having a low coefficient of friction; c. an upper shoulder abutting said upper bearing plate fabricated of a metal softer than that of said upper bearing plate; d. A lower shoulder abutting said lower bearing plate fabricated of a metal softer than that of said lower bearing plate; e. a seal sleeve closing off and defining a space for sealing lubricant about the interior of said bearing; and f. a lower seal assembly having a plurality of movable seals which are pressure responsive to balance internal bearing pressure with the external ambient well bore pressure.
Claim 7
Dependent Claim
33 words
The sealed bearing of claim 4 in which said lower seal assembly includes a plurality of spaced apart seals separated by shim sleeves and includes a biasing spring engageable with a hanger cone.
Claim 8
Dependent Claim
20 words
The sealed bearing of claim 4 in which the interior of said bearing is packed with a heat resistant lubricant.
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) | 1980-07-04 | 1981-01-03 | 1981-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-04 | 1985-01-03 | 1985-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-04 | 1989-01-03 | 1989-07-05 | $7700.00 | Window Closed / Lapsed |