Latch mechanism for subsea test tree

Details Latch mechanism for subsea test tree Latch mechanism for subsea test tree

1981-08-07

1984-03-13

Novosad, Stephen J.

Wells

Submerged well

Connection or disconnection of submerged members remotely...

166375, 166364, 166332, E21B 4312, E21B 3410

Patent

active

044361572

ABSTRACT:
A test assembly is provided for incorporation within a blowout preventer stack above a subterranean well and provides inner and outer latching connections between upper and lower portions of a tubular conduit extendible to a production zone within the well. The test assembly has valve means in the lower conduit portion manipulatable between open and closed positions by a reciprocable actuator to control flow of fluid within the conduit. Retaining means are provided for each of the inner and outer latches to insure that such latches may not be disengaged when the valve means is in other than an open position. The retaining means are operable by either the application of fluid pressure or through mechanical manipulation of the tubing string to be shifted to a non-retaining position relative to both the inner and outer latches, thus permitting selective disconnection and reconnection of the upper and lower portions of the tubular conduit.

REFERENCES:
patent: Re27464 (1972-08-01), Taylor, Jr.
patent: 3870101 (1975-03-01), Helmus
patent: 4062406 (1977-12-01), Akkerman et al.
patent: 4077473 (1978-03-01), Watkins
patent: 4161960 (1979-07-01), Watkins
patent: 4294315 (1981-10-01), Yonker et al.

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