Patent US4787396A successfully refreshed from Google Patents.
US3301063A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pressure recorder
Assignee: Schlumberger Well Surveying Corp
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Filing: 1964-12-10
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Granted: 1967-01-31
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Expires: 1984-12-10
Abstract
No abstract record available.
Inventors
- 👤 Iii James W Kisling
- 👤 John E Stachowiak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:54
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A PRESSURE-MEASURING APPARATUS FOR USE IN A WELL BORE WHERE THE APPARATUS INCLUDING A HOUSING, MEANS WITHIN THE HOUSING WHICH ARE RESPONSIVE TO CHANGES OF PRESSURE FOR PROVIDING INDICATIONS OF PRESSURES ENCOUNTERED IN THE WELL BORE, AND MEANS PROVIDING ACCESS FOR WELL FLUIDS TO THE HOUSING TO AFFECT SAID PRESSURE-RESPONSIVE MEANS, THE IMPROVEMENT COMPRISING: METAL BELLOWS MEANS HERMETICALLY SEALING OFF THE INTERIOR OF SAID HOUSING FROM GAS CONTAINED IN WELL FLUIDS AND PERMITTING THE INTERIOR OF SAID HOUSING TO BE FILLED WITH A PRESSURE-TRANSMITTING FLUID; ELASTOMER MEANS SEALING OFF SAID BELLOWS MEANS FROM ACCESS TO WELL FLUIDS AND FORMING A SPACE FOR RECEIVING A PRESSURE-TRANSMITTING FLUID; AND PRESSURE RELIEF VALVE MEANS IN COMMUNICATION WITH THE SPACE BETWEEN SAID BELLOWS AND ELASTOMER MEANS, SAID BELLOWS MEANS AND ELASTOMER MEANS PERMITTING PRESSURE IN THE WELL BORE TO BE SENSED WITHIN SAID HOUSING WITH EXPOSING THE INTERIOR OF SAID HOUSING TO GAS OR FLUID FOUND IN A WELL.
Claim 2
Dependent Claim
156 words
IN A PRESSURE-MEASURING APPARATUS FOR USE IN A WELL BORE WHERE THE APPARATUS INCLUDING A HOUSING, MEANS WITHIN THE HOUSING WHICH ARE RESPONSIVE TO CHANGES OF PRESSURE FOR PROVIDING INDICATIONS OF PRESSURES ENCOUNTERED IN THE WELL BORE, AND MEANS PROVIDING ACCESS FOR WELL FLUIDS TO THE HOUSING TO AFFECT SAID PRESSURE-RESPONSIVE MEANS, THE IMPROVEMENT COMPRISING: METAL BELLOWS MEANS HERMETICALLY SEALING OFF THE INTERIOR OF SAID HOUSING FROM GAS CONTAINED IN WELL FLUIDS AND PERMITTING THE INTERIOR OF SAID HOUSING TO BE FILLED WITH A PRESSURE-TRANSMITTING FLUID; ELASTOMER MEANS SEALING OFF SAID BELLOWS MEANS FROM ACCESS TO WELL FLUIDS AND FORMING A SPACE FOR RECEIVING A PRESSURE-TRANSMITTING FLUID; AND PRESSURE RELIEF VALVE MEANS IN COMMUNICATION WITH THE SPACE BETWEEN SAID BELLOWS AND ELASTOMER MEANS, SAID BELLOWS MEANS AND ELASTOMER MEANS PERMITTING PRESSURE IN THE WELL BORE TO BE SENSED WITHIN SAID HOUSING WITH EXPOSING THE INTERIOR OF SAID HOUSING TO GAS OR FLUID FOUND IN A WELL.
References Cited (Backward Citations)
US2816440A
Cited
US3177707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-30 | 1970-08-01 | 1971-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-30 | 1974-08-01 | 1975-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-30 | 1978-08-01 | 1979-01-31 | $7700.00 | Window Closed / Lapsed |