Rst (bvi), Inc.

Halliburton Energy Services, Inc.

Stephen John McLoughlin

Jeffrey Bowden Lasater

George Brian Sutherland

Feroze M Variava

Emerson Marcellus

Jack P Chance

An apparatus for use in drilling or producing from a well bore, the apparatus comprising a downhole member such as a drilling device or a production device which is capable of being attached to a tubular such as a drill string, production string or the like, means for rotating a tubular, control means for controlling the rotation of said tubular in order to transmit information along said tubular and means for monitoring the rotation of said tubular and for decoding said information transmitted along said tubular such that a magnitude of a parameter can be determined by the drilling member from the rotation or said tubular. The invention also relates to a method for communicating with a downhole tool using the apparatus.

Apparatus and method for transmitting information to and communicating with a downhole device

An apparatus for selectively controlling the direction of a well bore comprising a mandrel rotatable about a rotation axis; a direction controller means comprising at least two parts configured to apply a force to said mandrel with a component perpendicular to the said rotation axis; a housing having an eccentric longitudinal bore forming a weighted side and being configured to freely rotate under gravity; and a driver for selectively varying the angle of the force relative to the weighted side of the housing about said rotation axis, the driver being configured to move the two parts independently of one another.

Wellbore directional steering tool

Growing community of inventors

North Duffield, United Kingdom

Stephen John McLoughlin