Panex Corporation

Diamant Boart-stratabit (usa) Inc.

David E Young

Earl T Koskie, Jr

Andrew R Easton

Danny S Sebastian

A coring tool comprises a core cutting section and an actuating section disposed thereabove. The core cutting section includes axially telescoping outer and inner barrels. The inner barrel includes a jaw carrier which carries pivotable core-catching jaws normally covered along their radially inner sides by a driver sleeve. When the driver sleeve is raised by the actuator section the jaws are uncovered. Thereafter, the driver sleeve raises the jaw carrier to bring the jaws into contact with a stationary inclined jaw-deflecting surface to force the jaws laterally inwardly through the core. The actuator section relies upon fluid pressure to release for movement a vertically risible member which is mechanically lifted by a drill string to transmit vertical forces to the driver sleeve from a drill string.

Coring tool

An oilfield pressure gauge carrier for use in supporting pressure gauges on a string of pipe in a wellbore including an elongated carrier with a through bore and outer surface recesses for receiving one or more pressure gauges. A pressure gauge is attached to an outer surface for vertical movement in the event of an applied shock force and provided with spring damping devices at either end to absorb shock effects. A restricted flow passageway to the pressure gauge inhibits application of hydraulic surges to the pressure gauge.

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Seabrook, TX, United States of America

David E Young