Patent US3207221A successfully refreshed from Google Patents.
US3207221A
Expired / Lapsed
US
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Automatic blow-out preventor means
Assignee: Baker Hughes Holdings LLC
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Filing: 1963-03-21
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Granted: 1965-09-21
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Expires: 1983-03-21
Abstract
No abstract record available.
Inventors
- 👤 Chudleigh B Cochran
- 👤 James D Mott
- 👤 Jr Joseph E Edwards
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 10:23
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
153 words
AUTOMATIC BLOW-OUT PREVENTOR MEANS FOR USE WHEN RUNNING PIPE STRINGS INTO AND OUT OF A WELL UNDER PRESSURE, COMPRISING A TUBULAR HOUSING MOUNTABLE ON A WALL HEAD FITTING AND THROUGH WHICH A PIPE STRING IS PASSED, SPACED APART UPPER AND LOWER CONTRACTIBLE AND EXPANDIBLE SEAL ELEMENTS MOUNTED IN THE HOUSING ACTUATABLE TO SEAL OFF THE ANNULAR SPACE BETWEEN THE HOUSING AND THE PIPE STRING, AN ENLARGEMENT-SENSING MEANS MOUNTED IN THE HOUSING ADJACENT EACH OF THE RESPECTIVE SEAL ELEMENTS INCLUDING FLUID PRESSURE SIGNAL-TRANSMITTING MEANS OPERABLE TO PROVIDE SIGNALS INDICATING THE APPROACH OF AN ENLARGEMENT ON THE PIPE STRING SUCCESSIVELY TOWARD THE RESPECTIVE SEAL ELEMENTS, FLUID PRESSURE-OPERATED MEANS OPERABLY CONNECTED TO SAID SIGNAL-TRANSMITTINMG MEANS ACTUATABLE IN RESPONSE TO SAID SIGNALS AND ARRANGED TO SUCCESSIVELY ACTUATED SAID SEAL ELEMENTS IN INVERSE ORDER WITH RESPECT TO THE DIRECTION OF MOVEMENT OF SAID ENLARGEMENT, WHEREBY TO AUTOMATICALLY CONTRACT EACH SEAL ELEMENT AS IT IS APPROACHED BY SAID ENLARGEMENT.
Claim 2
Dependent Claim
153 words
AUTOMATIC BLOW-OUT PREVENTOR MEANS FOR USE WHEN RUNNING PIPE STRINGS INTO AND OUT OF A WELL UNDER PRESSURE, COMPRISING A TUBULAR HOUSING MOUNTABLE ON A WALL HEAD FITTING AND THROUGH WHICH A PIPE STRING IS PASSED, SPACED APART UPPER AND LOWER CONTRACTIBLE AND EXPANDIBLE SEAL ELEMENTS MOUNTED IN THE HOUSING ACTUATABLE TO SEAL OFF THE ANNULAR SPACE BETWEEN THE HOUSING AND THE PIPE STRING, AN ENLARGEMENT-SENSING MEANS MOUNTED IN THE HOUSING ADJACENT EACH OF THE RESPECTIVE SEAL ELEMENTS INCLUDING FLUID PRESSURE SIGNAL-TRANSMITTING MEANS OPERABLE TO PROVIDE SIGNALS INDICATING THE APPROACH OF AN ENLARGEMENT ON THE PIPE STRING SUCCESSIVELY TOWARD THE RESPECTIVE SEAL ELEMENTS, FLUID PRESSURE-OPERATED MEANS OPERABLY CONNECTED TO SAID SIGNAL-TRANSMITTINMG MEANS ACTUATABLE IN RESPONSE TO SAID SIGNALS AND ARRANGED TO SUCCESSIVELY ACTUATED SAID SEAL ELEMENTS IN INVERSE ORDER WITH RESPECT TO THE DIRECTION OF MOVEMENT OF SAID ENLARGEMENT, WHEREBY TO AUTOMATICALLY CONTRACT EACH SEAL ELEMENT AS IT IS APPROACHED BY SAID ENLARGEMENT.
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) | 1968-09-20 | 1969-03-22 | 1969-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-20 | 1973-03-22 | 1973-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-20 | 1977-03-22 | 1977-09-21 | $7700.00 | Window Closed / Lapsed |