Halliburton Energy Services, Inc.

Larry Lucius Cox

Michael Linley Fripp

Christopher Allen Grace

A reinforced seal for maintaining a pressure differential in a well bore includes an elastomeric layer and a backup layer between a drill pipe and the elastomeric layer at the wellhead. The backup layer has a first end portion, a second end portion, and a tapered portion, wherein the first end portion has a larger inner diameter than the second end portion and the tapered portion connects the first end portion and second end portion. In addition, the backup layer includes a plurality of slats substantially aligned with the longitudinal axis of the drill pipe and arranged circumferentially about the perimeter of the drill pipe along the internal surface of the backup layer such that a portion of each slat underlies a portion of each adjacent slat.

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Richardson, TX, United States of America

Larry Lucius Cox