Compensating bails

摘要

A pipe handler for assembling and deploying a string of threaded tubulars into a wellbore includes a pair of compensating bails and an elevator pivotally connected to the compensating bails. Each compensating bail includes: a first bail segment; a second bail segment; and a compensator connecting the respective first and second bail segments. Each compensator includes a load cylinder connected to the respective first bail segment and a linear actuator disposed in the respective load cylinder and operable to retract the respective second bail segment from a hoisting position to a ready position. Each second bail segment is engaged with the respective load cylinder in the hoisting position. The compensating bails are capable of supporting string weight in the hoisting position.

主权项

1. A pipe handler for assembling and deploying a string of threaded tubulars into a wellbore, comprising:
at least one compensating bail, comprising: a first bail segment; a second bail segment; and a compensator connecting the first and second bail segments; wherein:
the compensator comprises:
a load cylinder connected to the first bail segment; anda linear actuator disposed in the load cylinder and operable to retract the second bail segment from a hoisting position to a ready position,the second bail segment is engaged with a shoulder of the load cylinder in the hoisting position and disengaged with the shoulder of the load cylinder in the ready position, andthe at least one compensating bail is capable of supporting string weight in the hoisting position.