FINGER LATCH ACTUATION SENSOR

摘要

LATCH ACTUATION SENSOR In a hydraulically operated pipe handling system, there is a finger board for restraining substantial movement of drill pipe when in its storage position adjacent the side of a well drilling derrick. The finger board will typically have an array of spaced-apart locations for containing the individual drill pipe lengths. Forming the individual locations may be latch mechanisms, which are selectively controllable, each latch mechanism having two positions, either opened or closed. There is provided a sensing mechanism for determining the actuation of an individual finger latch, the sensor comprising a fluid actuated switch and may have associated therewith fluid pressure maintaining devices.