Back to results
US 10,871,063 B2Granted
Toolface control with pulse width modulation
AssigneeHalliburton Energy Services, Inc.
InventorRavi P. Nanayakkara
Life of this patent
Estimating the term…
Abstract
In accordance with some embodiments of the present disclosure, systems and methods for a toolface control system is disclosed. The system includes, a rotating drill string of a drilling tool, an assembly located within the rotating drill string representing a current toolface of the drilling tool, and a controller configured to use pulse width modulation to adjust a rotational speed of the assembly to maintain the current toolface at a desired toolface.
Claims16
A drilling system comprising:
- a rotating drill string of a drilling tool;
- an assembly located within the rotating drill string representing a current toolface of the drilling tool, the assembly rotating opposite the rotating drill string during a drilling operation;
- and
- a controller configured to use pulse width modulation to control a flow of fluid across a turbine, the turbine adjusting a rotational speed of the assembly to be approximately equal and opposite the rotating drill string in order to maintain the current toolface at a desired toolface.
1 more element
A method of forming a wellbore comprising:
- determining a desired toolface of a rotating drilling tool;
- calculating a toolface error by determining a distance between a current toolface and the desired toolface of the rotating drilling tool;
- rotating an assembly located within a rotating drill string of the rotating drilling tool opposite the rotating drill string, the assembly representing the current toolface of the rotating drilling tool;
- using a pulse width modulation to control a flow of fluid across a turbine, the turbine adjusting the rotational speed of the assembly to be approximately equal and opposite the rotating drill string to minimize the toolface error;
- and
- drilling a wellbore with a drill bit coupled to the rotating drilling tool.
3 more elements
Dependencies are inferred from the claim text.