Inventors:
Brian Ellis - Houston TX, US
Beat Kuttel - Houston TX, US
John Thomas Scarborough - Houston TX, US
Chris Papouras - Houston TX, US
Assignee:
Canrig Drilling Technology Ltd. - Houston TX
International Classification:
E21B 7/04
Abstract:
Apparatus and methods to steer a hydraulic motor when elongating a wellbore having a non-vertical component that includes a quill adapted to transfer torque, rotation, or position between a drive assembly and a drillstring, a bottom hole assembly (BHA) including a toolface orientation detector and at least one measurement while drilling (MWD) instrument or wireline-conveyed instrument, and a controller configured to transmit operational control signals to minimize friction between a drillstring and a wellbore, wherein the instrument is configured to detect pressure between an external surface of the BHA and an inner diameter of the wellbore.