Wells – Above ground apparatus – With seal for reciprocating member
Patent
1976-10-29
1978-01-31
Leppink, James A.
Wells
Above ground apparatus
With seal for reciprocating member
166 88, 251 1B, E21B 3303
Patent
active
040710858
ABSTRACT:
Well flow control apparatus includes a blow-out preventer or preventers removably installable in a well head. By-pass porting may be provided in the well head to by-pass the preventers; a shroud may be employed over the head to confine gases against leakage; and a special valve assembly may be provided to control production fluid flow.
REFERENCES:
patent: 1511529 (1924-10-01), Standlee
patent: 1709949 (1929-04-01), Rasmussen et al.
patent: 2071197 (1937-02-01), Burns et al.
patent: 2842386 (1958-07-01), Regan
patent: 3084745 (1963-04-01), Floyd
patent: 3939910 (1976-02-01), Bruce
Grable Donovan B.
Laney Bill C.
Haefliger William W.
Leppink James A.
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