Interwell As

William Edmund Rolland Brown

A method and downhole apparatus including a downhole indexer for cyclically varying a configuration or operational mode of a downhole tool according to a predetermined sequence. The apparatus includes tubular body, an indexing member, and a balance piston. The indexing member is selectively moveable relative to the tubular body between a first axial position and a second axial position in response to a signal. The balance piston supports the indexing member at the second position.

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Aberdeenshire, United Kingdom

William Edmund Rolland Brown