US3236301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Drilling and production apparatus and method
Assignee: Richfield Oil Corp
•
Filing: 1961-07-10
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Granted: 1966-02-22
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Expires: 1981-07-10
Abstract
No abstract record available.
Inventors
- 👤 Robert D Johnstone
- 👤 Jr Charles E Wakefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:13
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/12; E21B33/00; E21B33/02; E21B33/03; E21B33/035
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
AN UNDERWATER DRILLING AND PRODUCTION HEAD APPARATUS FOR CONTROLLING WELL PRESSURE AND THE FLOW OF FLUIDS FROM A WELL DRILLED FROM A FLOATING VESSEL INTO A FORMATION UNDERLYING A BODY OF WATER THROUGH FLUID CONTROL HOSES, AND WHEREIN A LANDING BASE HAVING AN APERTURE THEREIN, AND A WELL HEAD ARE POSITIONED AT THE WELL OPENING, COMPRISING IN COMBINATION: (A) CASING RISER (B) BLOWOUT PREVENTER OPERATIVELY CONNECTED TO SAID RISER, SAID BLOWOUT PREVENTER HAVING A HOUSING AND FLUID OPERATED CONTROL MEANS, (C) CONNECTING MEANS OPERATIVELY CONNECTING SAID WELL HEAD TO SAID BLOWOUT PREVENTER, SAID CONNECTING MEANS HAVING MEANS THEREIN FOR REMOTELY DISCONNECTING SAID BLOWOUT PREVENTER, (D) DISCONNECTABLE MEANS ASSOCIATED WITH SAID BLOWOUT PREVENTER HOUSING FOR COUPLING SAID CONTROL HOSES TO SAID HOUSING, AND (E) GUIDE MEANS COOPERATING WITH SAID RISER FOR CONNECTING SAID CENTRAL HOSES TO SAID BLOWOUT PREVENTER HOUSING.
Claim 2
Dependent Claim
139 words
AN UNDERWATER DRILLING AND PRODUCTION HEAD APPARATUS FOR CONTROLLING WELL PRESSURE AND THE FLOW OF FLUIDS FROM A WELL DRILLED FROM A FLOATING VESSEL INTO A FORMATION UNDERLYING A BODY OF WATER THROUGH FLUID CONTROL HOSES, AND WHEREIN A LANDING BASE HAVING AN APERTURE THEREIN, AND A WELL HEAD ARE POSITIONED AT THE WELL OPENING, COMPRISING IN COMBINATION: (A) CASING RISER (B) BLOWOUT PREVENTER OPERATIVELY CONNECTED TO SAID RISER, SAID BLOWOUT PREVENTER HAVING A HOUSING AND FLUID OPERATED CONTROL MEANS, (C) CONNECTING MEANS OPERATIVELY CONNECTING SAID WELL HEAD TO SAID BLOWOUT PREVENTER, SAID CONNECTING MEANS HAVING MEANS THEREIN FOR REMOTELY DISCONNECTING SAID BLOWOUT PREVENTER, (D) DISCONNECTABLE MEANS ASSOCIATED WITH SAID BLOWOUT PREVENTER HOUSING FOR COUPLING SAID CONTROL HOSES TO SAID HOUSING, AND (E) GUIDE MEANS COOPERATING WITH SAID RISER FOR CONNECTING SAID CENTRAL HOSES TO SAID BLOWOUT PREVENTER HOUSING.
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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) | 1969-02-21 | 1969-08-23 | 1970-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-02-21 | 1973-08-23 | 1974-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-02-21 | 1977-08-23 | 1978-02-22 | $7700.00 | Window Closed / Lapsed |