Mark Kenneth Reeves

US Patent:

20200240212, Jul 30, 2020

Filed:

Jan 29, 2019

Appl. No.:

16/261094

Inventors:

- Houston TX, US
William Christian Herben - Magnolia TX, US
Mark Allen Reeves - The Woodlands TX, US
Donald M. Sawyer - Montgomery TX, US
Roger W. Fincher - Conroe TX, US

International Classification:

E21B 4/02
E21B 7/06
E21B 3/00
E21B 21/08
E21B 44/00

Abstract:

A drilling assembly includes a power section with a housing that rotates in a first direction at a drill string rotation rate. An output rotates a drill bit through a transmission shaft in the first direction at a rotor rotation rate relative to the housing. A bent housing between the power section and the drill bit rotates in a second direction at a variable rotation rate relative to the power housing. The transmission shaft extends through the bent housing. A mechanical brake system adjusts the bent housing's variable rotation rate. The bent housing rotates relative to the wellbore in a rotary mode, but not in a sliding mode. The sliding mode maintains the drill bit's direction and inclination while the drill string rotates. In all modes, the drill bit's rotation rate is the sum of the drill string rate and the rotor rate relative to the power housing.

US Patent:

20190330922, Oct 31, 2019

Filed:

Apr 27, 2018

Appl. No.:

15/965330

Inventors:

- Houston TX, US
Mark Allen Reeves - The Woodlands TX, US
William Christian Herben - Magnolia TX, US

International Classification:

E21B 4/00

Abstract:

An integrated bearing section includes a mandrel partially disposed within a housing. The bearing section includes spherical members disposed between the mandrel's outer surface and the housing's inner surface. A radial bearing portion is formed by spherical members disposed partially within grooves and engaging a flat profile opposing surface. The grooves may be in the mandrel's outer surface, an outer surface of a mandrel sleeve, the housing's inner surface, or an outer radial bearing's inner surface. The flat profile opposing surface may be on an outer radial bearing's inner surface, the housing's inner surface, the mandrel's outer surface, or a mandrel sleeve's outer surface. A thrust bearing portion is formed by spherical members disposed partially within grooves in two opposing surfaces, such as the mandrel's outer surface or a mandrel sleeve's outer surface, and the housing's inner surface or an outer thrust bearing's inner surface.