Well head shut-off device

Details Well head shut-off device Well head shut-off device

1986-02-11

1987-04-07

Leppink, James A.

Wells

Above ground apparatus

With seal for reciprocating member

166 88, 277111, E21B 3306

Patent

active

046552847

ABSTRACT:
Well head shut-off device having a housing with a bore for connection to the upper end of production tubing, upper and lower shoulders in the bore and an annular pack-off element with an internal tapering expansion member driveable reciprocably between the shoulders whereby compression of the pack-off element against the shoulders expands the element tightly between the bore and a cylindrical shaft passing through the middle of the pack-off element, whereby a pack-off can be achieved at upper or at lower positions. This allows rapid pack-off to be achieved regardless of the direction in which the pack-off member is driven.

REFERENCES:
patent: 1844409 (1932-02-01), Rypinski
patent: 1902097 (1933-03-01), Penick et al.
patent: 2670689 (1952-09-01), Eckel
patent: 2780233 (1957-02-01), Volpin
patent: 4071085 (1978-01-01), Grable et al.
patent: 4289294 (1981-09-01), McLean
patent: 4384726 (1983-05-01), Meyer
patent: 4386783 (1983-06-01), Davis
patent: 4522368 (1985-06-01), Sable
Sketch A.
Double-E Blowout Preventer Brochure, pp. 15 and 16.
Guiberson Dresser Blowout Preventers Brochure, 2610-16.

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