Tool actuator

Details Tool actuator Tool actuator

1990-07-05

1992-08-25

Melius, Terry L.

Boring or penetrating the earth

With means movable relative to tool below ground to stop...

With longitudinally spaced valve seats

175320, 166319, 166386, E21B 2304

Patent

active

051410621

ABSTRACT:
A tool actuator which comprises a casing containing a pipe, which is movable from a locking position to an unlocking position, under the action of a fluid pumped through the casing. When the pipe is in the locking position it locks a mandrel in an activating or deactivating position. When the pipe is in the unlocking position it does not contact the mandrel which is therefore free to move between the activating and a deactivating positions. The fluid pressure will be different for each of the positions of the pipe and mandrel and consequently their position can be monitored by monitoring the pressure of the fluid, for a given fluid flow rate.

REFERENCES:
patent: 4106823 (1978-08-01), Bassinger
patent: 4821817 (1989-04-01), Cendre
patent: 4848490 (1989-07-01), Anderson
patent: 4851760 (1989-07-01), Cendre
patent: 4893675 (1990-01-01), Skipper
patent: 4917191 (1990-04-01), Hopmann et al.

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