Reeves Wireline Technologies Limited

Michael John Chaplain

Simon Christopher Ash

Michael Charles Spencer

An apparatus and method for deploying a so-called compact battery/memory logging tool, for acquiring data in deviated or horizontal wells in the oil and gas well data logging industry. A drillpipe assembly ( ) includes a drillpipe ( ) having secured at a downhole end thereof a delatching latching sub ( ) containing an extendable running sub ( ) supporting a battery/memory logging tool ( ). The running sub ( ) occupies an initial, retracted position during deployment of the drillpipe ( ), whereby the logging tool ( ) is protected within one or more drillpipe stands. The running sub is movable by a messenger ( ) to a second, extended position in which its logging tool ( ) protruding from the drillpipe ( ). The drillpipe assembly may therefore be used to protect the logging tool ( ) during running in operations; and then to extend the logging tool permit commencement of logging operations.

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Nuneaton, United Kingdom

Michael John Chaplain