Patent ID: 8776890

Claim:
A tool usable in a well, comprising: an operator having a head disposed within a cavity of a housing of the tool, the cavity being selectively supplied with hydraulic fluid through a passageway; a switch positioned in the passageway to selectively communicate a first force to the operator to actuate the tool by opening the passageway to flow of the hydraulic fluid; a compensator coupled to the passageway to supply the hydraulic fluid under pressure via a compensator piston exposed to well pressure in a surrounding annulus; and an indexer operated by a piston head exposed to a force generated by well pressure on one side and to an opposed force generated by a resilient member on the other side, the indexer being able to cycle through a sequence of positions in response to the force and the opposed force, the sequence including a position to cause the switch to open the passageway to flow of the hydraulic fluid to shift the operator.