Schlumberger Technology Corporation

David C Hoyle

Bronislaw Seeman

Alain G Delpuech

Alan J Sallwasser

A well logging apparatus adapted to be moved inside a borehole includes an elongate body, a measuring pad adapted to contact the wall of the borehole, a support device for the pad mounted pivotally on one side of the body, and a counter arm which causes the pad to be applied against the wall of the borehole. The support device includes an arm which carries the weight of the pad and is connected to the pad substantially in the central part thereof.

Well logging apparatus comprising a measuring pad and a combinaton

The invention concern a combination well logging device adapted to be moved inside a borehole to measure the properties of geological formations through which the borehole passes. The device according to the invention comprises a series of elongate logging sections mounted end to end, including a first section adapted to be maintained with a generatrix applied against the wall of the borehole, a second section comprising a body and a measurement pad adapted to be spaced radially from the body for application against said wall, a third section adapted to be kept space from said wall, and first and second hinges connecting the second section to the first and third sections respectively in order to allow respective angles of inclination between the second section and the first and third sections.

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Saint-Cloud, France

David C Hoyle