Wells – With eduction pump or plunger – Receptacles
Patent
1987-04-02
1988-11-08
Massie, Jerome W.
Wells
With eduction pump or plunger
Receptacles
166324, E21B 4300
Patent
active
047828951
ABSTRACT:
An apparatus for automatically closing a bottom safety valve in a pumped oil well in case of a cessation of pumping, and reopening the valve when pumping resumes. A conventional valve pump is installed in the production tube. A channel, which is connected to the production tube, passes through the valve body, and is blocked by a controllable flap. The valve body also contains a second channel, the two channels communicating by means of a cavity which is located upstream of the flap. A push rod slidably retained in the second channel is actuated by a piston for opening and closing the flap. A conduit connects the downstream portion of the production tube to an admission chamber and thereby transmits pressure to the piston; such that, when the downstream pressure of the valve pump is greater than that at the bottom of the well, the flap remains open; and when the difference in the pressures is reversed, the push rod causes the flap to close.
REFERENCES:
patent: 739042 (1903-09-01), White
patent: 3078923 (1963-02-01), Tausch
patent: 3788595 (1974-01-01), Colonna
patent: 3865141 (1975-01-01), Young
patent: 3958633 (1976-05-01), Britch et al.
patent: 4440221 (1984-04-01), Taylor et al.
patent: 4519457 (1985-05-01), Holland et al.
patent: 4641707 (1987-02-01), Akkerman
Jacob Jean-Luc
Mourlevat Jean
Massie Jerome W.
Neuder William P.
Societe Nationale Elf Aquitaine (Production)
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