Subsea test tree and methods of servicing a subterranean well

Details Subsea test tree and methods of servicing a subterranean well Subsea test tree and methods of servicing a subterranean well

1998-03-19

2000-02-22

Lillis, Elieen Dunn

Wells

Submerged well

Testing

166363, E21B 712, E21B 3404

Patent

active

060269057

ABSTRACT:
A subsea test tree and associated methods of servicing a well provide enhanced safety in testing operations. In a described embodiment, a subsea test tree includes a latch head assembly, a valve assembly, and a ramlock assembly interconnected between the latch head assembly and the valve assembly. The valve assembly includes two safety valves, one of which is operable by displacing a piston within the latch head assembly. The other safety valve is operable by applying fluid pressure to a line connected to the latch head assembly.

REFERENCES:
patent: 4256282 (1981-03-01), Goldschild et al.
patent: 4658904 (1987-04-01), Doremus et al.
patent: 5771974 (1998-06-01), Stewart et al.

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