Mark T Penn

US Patent:

20170370151, Dec 28, 2017

Filed:

Dec 29, 2015

Appl. No.:

15/540593

Inventors:

- Houston TX, US
Mark Charles PENN - Katy TX, US
Anthony PINK - Houston TX, US
Joseph Kyle SMITH - Cleveland TX, US

Assignee:

National Oilwell Varco, L.P. - Houston TX

International Classification:

E21B 7/04
E21B 44/00
E21B 47/022
G05B 15/02

Abstract:

Embodiments of systems and methods to control directional drilling in borehole drilling for hydrocarbon wells are disclosed. An actual toolface orientation measurement value and an actual downhole torque on bit (DTOB) or actual downhole weight on bit (DWOB) measurement value for a drill string positioned in a borehole are determined. Responsive to a comparison of target measurement values and actual measurement values, error values are determined. A control command for one or more of a top drive, a drawworks, and a mud pump responsive to the DTOB or DWOB error value and the toolface orientation error value is determined. Additionally, one or more of the top drive, the drawworks, and the mud pump are operated responsive to the control command thereby to correct a toolface orientation of the drill string.