Casing hanger running tool using annulus pressure

Details Casing hanger running tool using annulus pressure Casing hanger running tool using annulus pressure

1990-01-31

1991-09-03

Neuder, William P.

Wells

Processes

Placing or shifting well part

166182, 166348, 166383, 166387, 285 18, 285140, E21B 3343, E21B 2304

Patent

active

050444425

ABSTRACT:
A running tool will set a packoff between a casing hanger and a wellhead housing utilizing weight and hydraulic pressure. The running tool has a mandrel which connects to the drill string. A lower and an upper body are carried by the mandrel. The lower body releasably connects to the casing hanger for supporting the casing hanger as it is lowered into the well. The packoff mounts to the upper body. An elastomeric seal locates on the upper body of the packoff. The upper body will move downward relative to the lower body once the casing has been cemented. In this lower position, weight of the drill string transmits from a collar to the elastomeric seal to form a seal against the wellhead housing. Hydraulic pressure may then be applied. The hydraulic pressure creates a force on the upper body to set the packoff. The running tool along with the elastomeric seal will be retrieved to the surface.

REFERENCES:
patent: 4790572 (1988-12-01), Slyker
patent: 4903776 (1990-02-01), Nobileau et al.

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