Patent US3885629A successfully refreshed from Google Patents.
US3885629A
Expired / Lapsed
US
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Method and assembly for controlling blow-outs in oil wells
Assignee: CREPACO CORP NV 1801 S OCEAN DRIVE HALLANDALE
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Filing: 1972-07-27
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Granted: 1975-05-27
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Expires: 1992-07-27
Abstract
Abstract The disclosure herein describes a new method of sealing off wells, such as those producing oil and gas in the event of a blowout; the method consists in tapping the well-head with a branch line connected to a supply of liquid carbon dioxide or nitrogen under pressure. The introduction of CO2 or nitrogen into a high-pressure oil rig-pipe has a double purpose; first, if introduced in sufficient quantity, it freezes the pipe and, secondly, in being mixed with the flammable and combustible fluid, it renders the fluid inert, i.e., non-flammable and noncombustible.
Inventors
- 👤 Brian Richard Erb
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:40
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/02; E21B33/03; E21B33/06; E21B35/00; E21B36/00; E21B36/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A METHOD OF SEALING OFF AN EXPLOITARY WELL FOR THE PRODUCTION OF OIL AND GAS, SAID WELL HAVING A WELL-HEAD INCLUDING A CORE THROUGH WHICH EXTENDS A DRILL PIPE, COMPRISING THE STEPS OF INTRODUCING BY PUMPING DOWN THE DRILL PIPE LIQUID CARBON DIOXIDE AT A GIVEN RATE OF FLOW TO A DESIRED HEIGHT IN SAID DRILL PIPE; PUMPING IN SAID DRILL PIPE ABOVE SAID CARON DIOXIDDE AN ALCOHOL SUBSTANCE; AND PUMPING IN SAID DRILL PIPE OVER SAID ALCOHOL SUBSTANCE MUD TO THEREBY PREVENT THE EGRESS OF OIL AND GAS RESULTING FROM THE BLOWOUT AND PREVENT GROUND FRACTURING ADJACENT THE WELL.
Claim 2
Independent Claim
100 words
A METHOD OF SEALING OFF AN EXPLOITARY WELL FOR THE PRODUCTION OF OIL AND GAS, SAID WELL HAVING A WELL-HEAD INCLUDING A CORE THROUGH WHICH EXTENDS A DRILL PIPE, COMPRISING THE STEPS OF INTRODUCING BY PUMPING DOWN THE DRILL PIPE LIQUID CARBON DIOXIDE AT A GIVEN RATE OF FLOW TO A DESIRED HEIGHT IN SAID DRILL PIPE; PUMPING IN SAID DRILL PIPE ABOVE SAID CARON DIOXIDDE AN ALCOHOL SUBSTANCE; AND PUMPING IN SAID DRILL PIPE OVER SAID ALCOHOL SUBSTANCE MUD TO THEREBY PREVENT THE EGRESS OF OIL AND GAS RESULTING FROM THE BLOWOUT AND PREVENT GROUND FRACTURING ADJACENT THE WELL.
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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) | 1978-05-26 | 1978-11-25 | 1979-05-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-26 | 1982-11-25 | 1983-05-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-26 | 1986-11-25 | 1987-05-27 | $7700.00 | Window Closed / Lapsed |