Downhole actuating apparatus

摘要

A downhole tool comprises a housing defining a main bore and an actuatable member moveable from a first configuration to a second configuration to permit actuation of the tool. The tool includes an indexer mounted within the housing and arranged to progress linearly in a first direction along the main bore of the housing in a predetermined number of discrete sequential and progressive steps of linear movement in said first direction by passage of a corresponding number of objects through the indexer to cause said actuatable member to move towards its second configuration.

主权项

1. A downhole tool, comprising:
a housing defining a main bore; an actuatable member moveable from a first configuration to a second configuration; an indexer mounted within and engaged with the housing and arranged to progress linearly in a first direction along the main bore of the housing in a predetermined number of discrete sequential and progressive steps of linear movement in said first direction by passage of a corresponding number of objects through the tool to cause said actuatable member to move towards its second configuration; and an object interface arrangement to be engaged by an object and to transfer a drive energy or force from the object to the indexer such that the object drives the indexer to move at least one discrete step.