Casing hanger running tool using string tension

Details Casing hanger running tool using string tension Casing hanger running tool using string tension

1988-12-16

1990-02-27

Novosad, Stephen J.

Wells

Processes

Placing or shifting well part

166182, 166348, 166383, 166387, 285 18, 285140, E21B 33043, E21B 2304

Patent

active

049037765

ABSTRACT:
A tool for setting the packoff between the casing hanger and the wellhead utilizes differential area pistons. The tool has a mandrel which connects to a string of drill pipe. The mandrel carries a body and is axially movable relative to the body. A setting sleeves is carried by the body for connection to the packoff. A setting sleeve piston is carried by the body for relative movement relative to the body. A mandrel piston is carried by the mandrel for movement with the mandrel. Passages in the body communicate the mandrel piston with a setting sleeve piston and contain an incompressible fluid. Axial movement of the mandrel causes the pressure to increase to drive the setting sleeve piston downward to set the packoff.

REFERENCES:
patent: 4595053 (1986-06-01), Watkins et al.
patent: 4597448 (1986-07-01), Baugh
patent: 4712621 (1987-12-01), Wightman et al.
patent: 4736799 (1988-04-01), Ahlstone
patent: 4749047 (1988-06-01), Taylor
patent: 4790572 (1988-12-01), Slyker

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