87116376
Jul 26, 2016
Jan 17, 2017
WEATHERFORD TECHNOLOGY HOLDINGS LLC
Active Trademark
Power-operated downhole tools, namely, a rotating control device and valve used to automatically manage wellbore pressure and fluid circulation during oil and gas drilling operations
MachineryFlow control machines and apparatus, namely, an electrically controlled valve and rotating control device used to automatically manage wellbore pressures and fluid circulation during oil and gas drilling
Electrical and Scientific Apparatus