Abb Vetco Gray Incorporated

Vetco Gray Inc.

Dale B Marietta

Lawrence A Eckert

Norman Brammer

Charles D Bridges

Garry R Stephen

Alistair MacDonald

Allan C Sharp

Casimir J Fritshe

A well completion system utilizes a seal which carries its own load ring. The seal is lowered into the bore of a wellhead housing around a tubular member. The seal carries a split load ring, which once positioned will move outward into engagement with a groove formed in the wellhead housing. A locking assembly will lock the seal to the wellhead housing. The locking assembly has a casing lock ring which will secure to the upper end of a section of casing, if the casing has been cut due to an emergency stuck condition. A tubing hanger lands over the locking assembly. The tubing hanger is retained by an actuating ring and lock ring that are independent of the tubing hanger seal.

Wellhead completion system

A connector assembly connects a hub connector to a wellhead housing by utilizing a collet. The collet has an upper internal projection that engages the hub connector and a lower internal projection that engages the flange on the wellhead housing. An actuator ring moves the collet from an unlocked to a locked position, the actuator ring moving axially. A drive nut, when rotated, will move the actuator ring downward. Load screws extending through the drive nut force the actuator ring further downward after the drive nut has reached its lower position. Release pins extending through the actuator ring, when rotated inward, will pry against a release surface to move the actuator ring upward relative to the drive nut.

Mechanically locked wellhead connector

A connector for connecting a tubular starter head to a casing of a well allows connection without special tools. The tubular head has an annular recess extending upward from its lower end. The connector includes a seal actuating ring and a slips actuating ring, one of the rings having a recess. A seal ring locates in one of the recesses and slips locate in the other recess. Upward movement of one of the actuating rings sets either the slips or the seal ring first while the other remains unset. Then upward movement of the other actuating ring sets the other.

Well starter head

A locking device for locking the threaded connection of two tubular members together utilizes a key. The threaded members have an overlapping section. One of the sections has a slot machined in it. A key is driven into this slot. The key fits in an interference fit to secure the members. The key has an enlarged head to enable the key to be extracted if the connection needs to be loosened.

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Singapore, Singapore

Dale B Marietta