Michael Hunt

Address:

9100 Fondren Rd APT 168, Houston, TX 77074

VIN:

4T1BE46K87U520780

Make:

TOYOTA

Model:

CAMRY

Year:

2007

US Patent:

6510895, Jan 28, 2003

Filed:

Nov 6, 2000

Appl. No.:

09/706958

Inventors:

Bashir M. Koleilat - Spring TX
David E. Cain - Houston TX
Qiu Shi Zheng - Spring TX
Michael Hunt - Houston TX

Assignee:

FMC Technologies - Chicago IL

International Classification:

E21B 3304

US Classification:

166208, 166217, 277328, 285348

Abstract:

A mechanically energized annular packoff seal cartridge for metal-to-metal sealing with substantially concentrically arranged tubular members, such as the tubular wellhead housing and well casing of an oil and gas well. A tubular pressure responsive energizing mandrel having downwardly converging frusto-conical seal actuating surfaces is of a dimension for entry into the annulus between the wellhead seal bore and the rough outer surface of the well casing. Elastomer seals are carried by the energizing mandrel and establish sealing of the energizing mandrel with the wellhead housing and well casing A pair of soft metal seal rings are carried by the seal cartridge and are forced radially into metal-to-metal sealing with the wellhead housing and the rough outer surface of the well casing respectively by the double tapered seal actuating surfaces responsive to pressure induced downward force on the energizing mandrel. A locking mandrel and the seal actuating mechanism are restrained against actuating movement during running of the seal cartridge by a running tool by shear pins, thus enabling the cartridge to pass through various well equipment. The shear pin of the locking mandrel is sheared by downward force applied by the running tool to lock the seal cartridge within the wellhead housing.