Well devices with annulus check valve and hydraulic by-pass

Details Well devices with annulus check valve and hydraulic by-pass Well devices with annulus check valve and hydraulic by-pass

1981-09-21

1984-05-22

Purser, Ernest R.

Wells

With below and above ground modification

Above ground actuating means for below ground device

166 87, 166321, 166332, E21B 3410, E21B 3412

Patent

active

044495838

ABSTRACT:
Hanger apparatus for suporting pipe in a well, the apparatus including both an annulus check valve, via which communication is established with the annulus between the suspended pipe and surrounding casing, and a pressure fluid by-pass, via which communication with a down-hole device such as a safety valve is established. Opening of the check valve and establishment of communication via the by-pass are accomplished by a simple stabbing operation with, e.g., a handling tool or a production upper body. Alternately, the check valve is opened by hydraulic pressure delivered via the production upper body.

REFERENCES:
patent: 2080610 (1937-05-01), Humason
patent: 3171489 (1965-03-01), Cole et al.
patent: 3310107 (1967-03-01), Yancey
patent: 3324951 (1967-06-01), Balmer et al.
patent: 3492026 (1970-01-01), Ahlstone
patent: 3739846 (1973-06-01), Beson
patent: 3786863 (1974-01-01), Tausch
patent: 4109712 (1978-08-01), Regan
patent: 4333526 (1982-06-01), Watkins

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