Weatherford Holding U.S., Inc.
Patent Applications and Registrations
Patent applications and USPTO patent grants for Weatherford Holding U.S., Inc..The latest application filed is for "method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling".
- Weatherford Holding U.S., Inc. - Houston TX
| Patent | Date |
|---|---|
| Method and system for return of drilling fluid from a sealed marine riser to a floating drilling rig while drilling Grant 6,263,982 - Hannegan , et al. July 24, 2 | 2001-07-24 |
| Method and apparatus for drilling a borehole into a subsea abnormal pore pressure environment Grant 6,138,774 - Bourgoyne, Jr. , et al. October 31, 2 | 2000-10-31 |
| Pump drive head backspin retarder Grant 6,135,740 - Hult , et al. October 24, 2 | 2000-10-24 |
| Pump drive head pump assembly with a hydraulic pump circuit for preventing back-spin when the drive head has been shut off Grant 6,113,355 - Hult , et al. September 5, 2 | 2000-09-05 |
uspto.report is an independent third-party trademark research tool that is not affiliated, endorsed, or sponsored by the United States Patent and Trademark Office (USPTO) or any other governmental organization. The information provided by uspto.report is based on publicly available data at the time of writing and is intended for informational purposes only.
While we strive to provide accurate and up-to-date information, we do not guarantee the accuracy, completeness, reliability, or suitability of the information displayed on this site. The use of this site is at your own risk. Any reliance you place on such information is therefore strictly at your own risk.
All official trademark data, including owner information, should be verified by visiting the official USPTO website at www.uspto.gov. This site is not intended to replace professional legal advice and should not be used as a substitute for consulting with a legal professional who is knowledgeable about trademark law.
| 