Subsurface safety valve apparatus

Details Subsurface safety valve apparatus Subsurface safety valve apparatus

1976-04-23

1977-03-29

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

137155, 251 57, E21B 4312

Patent

active

040143864

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a subsurface safety valve assembly includes a dome precharged with a set reference pressure that tends to close the valve, and means responsive to both ambient pressure and to the pressure of a control fluid for holding the valve open under normal conditions, a decrease in either control fluid pressure or tubing pressure, or both, enabling the dome pressure to cause the valve to automatically close and shut-in the well. The valve does not employ a coil spring to cause closure, which permits installation at great depths in a well, and a narrow spread between valve opening and closing pressures.

REFERENCES:
patent: 3183921 (1965-05-01), Garrett
patent: 3802504 (1974-04-01), Garrett
patent: 3827501 (1974-08-01), Johnson et al.
patent: 3884300 (1975-05-01), Garrett

Affiliated with

Also associated with

Rating

Subsurface safety valve apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Subsurface safety valve apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Subsurface safety valve apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-544820