Wells – Above ground apparatus – Inner member anchor or seal with valve
Patent
1979-05-10
1982-06-08
Pate, III, William F.
Wells
Above ground apparatus
Inner member anchor or seal with valve
166 72, 166 88, E21B 3402
Patent
active
043335268
ABSTRACT:
An annulus valve apparatus integrated within a tubing hanger controls fluid flow through a tubing-casing annulus formed between a casing and a tubing string located within and generally concentric to the casing and connected to the tubing hanger. The tubing hanger is landed within the casing and sealing relation thereto and divides the annulus into an upper and lower portion. Fluid flow passages located within the hanger body communicate between the portions of the annulus above and below the hanger. An annulus opening means, mounted to the hanger body, allows fluid to pass between the fluid flow passages and the portion of the annulus below the hanger. The opening means is spring biased to close the passages to fluid flow. A plurality of control fluid passages in the hanger body communicate between the opening means and the hanger bore, which is aligned with the tubing bore, and pass a hydraulic control fluid from the hanger bore to the opening means. The control fluid communicates with a shoulder on the inner surface of the opening means. When the pressure of the control fluid on the shoulder portion of the opening means is greater than the biasing force on the opening means provided by the springs, the opening means is moved by the fluid along the hanger body to a position which opens the passages to fluid flow between upper and lower portions of the annulus. The hydraulic fluid is supplied to the hanger bore by means of a tubing mandrel positioned therein.
REFERENCES:
patent: 1902540 (1933-03-01), Brown
patent: 3360048 (1967-12-01), Watkins
patent: 4049052 (1977-09-01), Arendt
patent: 4109712 (1978-08-01), Regan
patent: 4125155 (1978-11-01), Brock, Jr.
Felsman Robert A.
Hughes Tool Company
Pate III William F.
Smith Guy Porter
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