Patent US3396799A successfully refreshed from Google Patents.
US3396799A
Expired / Lapsed
US
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Descent-facilitating apparatus for well tools
Assignee: Schlumberger Technology Corp
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Filing: 1966-09-02
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Granted: 1968-08-13
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Expires: 1986-09-02
Abstract
No abstract record available.
Inventors
- 👤 Ronald A Anderson
- 👤 George H Pardue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:43
CPC Classifications
E; E21; E21B; E21B23/00; E21B23/14; E21B7/00; E21B7/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
101 words
APPARATUS PARTICULARLY FOR USE IN DEVIATED WELL BORES HAVING LIQUIDS THEREIN AND COMPRISING: A WELL TOOL; AND GUIDING MEANS COUPLED TO THE LOWER END OF SAID WELL TOOL AND INCLUDING AN ELONGATED BODY HAVING A LENGTH GREATER THAN ITS TRANSVERSE WIDTH AND ITS TRANSVERSE WIDTH GREATER THAN ITS HEIGHT, SAID BODY HAVING MEANS EXTENDING ALONG ITS LENGTH FOR SPACING SAID BODY ABOVE THE UPWARDLY FACING SURFACES OF A DEVIATED WELL BORE TO PERMIT WELL BORE LIQUIDS TO FLOW UNDER SAID B ODY AND EXERT PRESSURE FORCES THEREON TENDING TO LIFT SAID BODY AS SAID WELL TOOL PROGRESSES DOWN THE WELL BORE.
Claim 2
Dependent Claim
101 words
APPARATUS PARTICULARLY FOR USE IN DEVIATED WELL BORES HAVING LIQUIDS THEREIN AND COMPRISING: A WELL TOOL; AND GUIDING MEANS COUPLED TO THE LOWER END OF SAID WELL TOOL AND INCLUDING AN ELONGATED BODY HAVING A LENGTH GREATER THAN ITS TRANSVERSE WIDTH AND ITS TRANSVERSE WIDTH GREATER THAN ITS HEIGHT, SAID BODY HAVING MEANS EXTENDING ALONG ITS LENGTH FOR SPACING SAID BODY ABOVE THE UPWARDLY FACING SURFACES OF A DEVIATED WELL BORE TO PERMIT WELL BORE LIQUIDS TO FLOW UNDER SAID B ODY AND EXERT PRESSURE FORCES THEREON TENDING TO LIFT SAID BODY AS SAID WELL TOOL PROGRESSES DOWN THE WELL BORE.
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) | 1971-08-13 | 1972-02-12 | 1972-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-13 | 1976-02-12 | 1976-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-13 | 1980-02-12 | 1980-08-13 | $7700.00 | Window Closed / Lapsed |