Multi-directionally rotating downhole drilling assembly and method
US9506335B1 · kind B1 · utility
Inventor
Key dates
| Filing date | May 26, 2015 |
| Grant date | Nov 29, 2016 |
| Priority date | — |
| Expiry date | Jun 25, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45129
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Embodiments of a downhole drilling assembly generally include a rotatable lower drilling assembly, a rotatable upper drilling assembly, and a drill bit, wherein the upper drilling assembly contains a mud motor adapted for clockwise rotation of its stator and counter-clockwise rotation of its rotor, whereby the lower drilling assembly is rotatable in the opposite direction of the upper drilling assembly or maintainable in a non-rotating state. The apparatus further includes sensors adapted to continuously measure physical properties and/or drilling parameters and a mechanism for continuously transmitting information relating thereto to the surface.Embodiments of a method for operating a downhole drilling assembly generally include continuously measuring physical properties and/or drilling parameters proximate the drill bit, continuously transmitting information relating thereto to the surface, and controlling rotation of a lower drilling assembly in a non-rotating state or in the opposite direction of an upper drilling assembly by varying drill string rotation.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.