Invention Application
- Patent Title: COMPENSATING BAILS
- Patent Title (中): 补充贝
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Application No.: US15277290Application Date: 2016-09-27
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Publication No.: US20170016285A1Publication Date: 2017-01-19
- Inventor: Brittan S. PRATT , Karsten HEIDECKE
- Applicant: Weatherford Technology Holdings, LLC
- Main IPC: E21B19/06
- IPC: E21B19/06 ; E21B19/16

Abstract:
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.
Public/Granted literature
- US09951570B2 Compensating bails Public/Granted day:2018-04-24
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