US3603392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well packer anchor
Assignee: Schlumberger Technology Corp
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Filing: 1969-09-15
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Granted: 1971-09-07
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Expires: 1989-09-15
Abstract
Abstract A retrievable well-packer apparatus including a body member having upper and lower expander means slidably mounted thereon for movement toward and away from each other, slip means between said expander members and slidably coupled to said body member and one of said expander means, and packing means for sealing off a well bore in response to movement of said body member relative to slip and expander means in one longitudinal direction, said packing means including elastomeric packing elements and pressure responsive parts subject to fluid pressure acting in the opposite longitudinal direction for exerting compressive force on said packing elements.
Inventors
- 👤 Howard L Mcgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:47
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/128; E21B33/129; E21B33/1291; E21B33/1292
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
119 words
Apparatus for use in a well bore comprising: a body member; normally retracted slip means capable of being shifted laterally of said body member; expander means haviNg a slidable spline connection to said slip means so that movement in one direction relative to said slip means causes expansion of said slip means and movement in the opposite direction causes retraction of said slip means; annular ring means having a radially slidable coupling to said slip means for mounting said slip means for sliding movement along said body member; and stop means including coengageable shoulder surfaces on said ring means and said body member for limiting sliding movement of said slip means along said body member in said opposite direction.
Claim 2
Dependent Claim
119 words
Apparatus for use in a well bore comprising: a body member; normally retracted slip means capable of being shifted laterally of said body member; expander means haviNg a slidable spline connection to said slip means so that movement in one direction relative to said slip means causes expansion of said slip means and movement in the opposite direction causes retraction of said slip means; annular ring means having a radially slidable coupling to said slip means for mounting said slip means for sliding movement along said body member; and stop means including coengageable shoulder surfaces on said ring means and said body member for limiting sliding movement of said slip means along said body member in said opposite direction.
Claim 3
Dependent Claim
31 words
The apparatus of claim 1 wherein said radial slidable coupling is provided by recess means in said slip means, portions of said ring means being slidably received in said recess means.
Claim 4
Dependent Claim
44 words
The apparatus of claim 1 further including selectively operable coengageable means on said body member and expander means for securing said expander means to said body member in movement transmitting relationship in spaced longitudinal relative positions of said body member and said expander means.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
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Cited
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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) | 1974-09-06 | 1975-03-08 | 1975-09-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-06 | 1979-03-08 | 1979-09-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-06 | 1983-03-08 | 1983-09-07 | $7700.00 | Window Closed / Lapsed |