US3556216A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Deep well pump anchor
Assignee: Individual
•
Filing: 1969-11-10
•
Granted: 1971-01-19
•
Expires: 1989-11-10
Abstract
Abstract A hollow mandrel connected in a pump tubing string above or below the pump, conical cams formed externally in said mandrel expanding wickered slips slot mounted in a tubular sleeve surrounding said mandrel which sleeve is spring biased downwardly to cause expansion of said slips when said sleeve is rotated clockwise by pump vibration and by gravity action produced by steep helical track on sleeve resting on fixed lug on mandrel. Setting of slips thus anchors pump in casing. Release of slips is effected by lifting of slip mounting sleeve relative to mandrel by action of mandrel lug on helical track when pump tubing is rotated clockwise in preparation for withdrawing pump from well.
Inventors
- 👤 Elmo L Condra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 14:29
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/01
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
116 words
A device for anchoring a deep well pump in a surrounding casing, said device comprising: a hollow mandrel having means at its upper end to suspend it from a pumping string; conical cam means exteriorly provided on said mandrel and tapering upwardly; wickered slips fitting said cam means and adapted to be expanded by downward movement of said slips; a sleeve surrounding said mandrel and having slots in which said slips are mounted, there being a helical track provided on the lower end of said sleeve; a lug projecting from sAid mandrel into supporting relation with said sleeve so that said track rests on said lug; and spring means biasing said sleeve downwardly on said mandrel.
Claim 2
Independent Claim
116 words
A device for anchoring a deep well pump in a surrounding casing, said device comprising: a hollow mandrel having means at its upper end to suspend it from a pumping string; conical cam means exteriorly provided on said mandrel and tapering upwardly; wickered slips fitting said cam means and adapted to be expanded by downward movement of said slips; a sleeve surrounding said mandrel and having slots in which said slips are mounted, there being a helical track provided on the lower end of said sleeve; a lug projecting from sAid mandrel into supporting relation with said sleeve so that said track rests on said lug; and spring means biasing said sleeve downwardly on said mandrel.
Claim 3
Dependent Claim
33 words
A device as recited in claim 1 wherein stop means is provided for limiting the degree of relative rotation permitted between said mandrel and said sleeve to the length of said helical track.
Claim 4
Dependent Claim
20 words
A device as recited in claim 2 wherein said track is relatively steeply angled and is approximately 350* in length.
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) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |