Method and means for emergency shearing and sealing of well casi

Details Method and means for emergency shearing and sealing of well casi Method and means for emergency shearing and sealing of well casi

1980-04-23

1982-04-06

Leppink, James A.

Wells

Means for perforating, weakening, bending or separating pipe...

With disparate below ground feature

102307, 166361, 166 63, E21B 2908, E21B 3306

Patent

active

043231179

ABSTRACT:
Natural gas deposits vented by oil or gas wells may pressurize a well beyond the capacity of installed apparatus to contain damage in the event of equipment failure, blow-out, or fire with the result that a well may flow out of control. The means and method of this invention provide for emergency action to shear a well casing together with internal piping or tubing and to seal a well if blow-out preventers otherwise provided do not prove effective. The apparatus of this invention may be self-powering.

REFERENCES:
patent: 1851894 (1932-03-01), Clough
patent: 2543057 (1951-02-01), Porter
patent: 2737115 (1956-03-01), Bissell
patent: 2761384 (1956-09-01), Sweetman
patent: 3561526 (1971-02-01), Williams, Jr.
patent: 3828408 (1974-08-01), Ortiz
patent: 4140041 (1979-02-01), Frelau

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