Ge Oil Gas Pressure Control LP

Cactus Wellhead, LLC

Jerry D Smith

Martin Anthony Trumbull

Danny R Wilkins

Thomas H Holtkamp

A casing hanger and running tool system and method for rotating a casing string in a borehole include a selectively engageable connection between the casing hanger and the running tool whereby upon rotation of the casing hanger and running tool in a first direction, a length of casing may be rotated without any substantial tightening of a threaded connection between the running tool and the casing hanger, and upon rotation of the running tool in a second direction, the threaded connection between the running tool and the casing hanger may be disengaged.

Casing hanger and running tool system

A method of drilling and fracturing a well includes installing a drilling/frac adapter on a lower wellhead housing. The drilling/frac adapter has a higher internal pressure rating than the lower wellhead housing. The operator drills through the drilling/frac adapter to a desired depth, then runs and cements a casing string in the well. A lower packoff is installed in an annulus between the casing hanger and the lower wellhead housing and an upper packoff is set in an annulus between the drilling/frac adapter and the casing hanger. Frac fluid is pumped through the frac tree into the casing string at a higher pressure than the pressure rating of the lower housing but less than the pressure rating of the drilling/frac adapter. Then, the upper packoff and the drilling/frac adapter are removed from the lower housing and installing an upper wellhead housing on the lower wellhead housing.

Drilling/frac adapter and method of use

A method for rotating a casing string in a borehole and a mandrel casing hanger and running tool system, include a selectively engageable connection between a mandrel casing hanger and a running tool; and a rotational force may be applied to the mandrel casing hanger, running tool, and casing string, without substantially tightening a threaded connection between the running tool and the mandrel casing hanger, by transmitting the rotational force through the selectively engageable connection.

Growing community of inventors

Spring, TX, United States of America

Jerry D Smith