Steering device for bottomhole drilling assemblies
AssigneeBaker Hughes Incorporated
InventorsArthur D. Hay, Mike H. Johnson, Volker Krueger
Life of this patent
Estimating the term…
Abstract
A coring apparatus permitting the taking of a non-rotating core sample and testing of same, as by NMR, prior to breakage and ejection from the apparatus. A core barrel is suspended from a rotating outer sleeve by one or more bearing assemblies which permit the core barrel to remain stationary during rotation of the sleeve with attached core bit for cutting the core. A core test device is fixed with respect to the core barrel on the outside thereof to test the core as it proceeds through the barrel. The apparatus optionally includes a directional detecting device such as an inclinometer and a compact set of circumferentially-spaced steering arms for changing the direction of the apparatus during coring.
Claims20
A steering device for a boffomhole drilling assembly, comprising:
- a housing securable to a drill string;
- and
- a body rotatably mounted with respect to said housing and carrying a plurality of circumferentially-spaced, selectively extendable and retractable arms, each arm of said plurality of arms comprising an elongated member extendable and retractable through respective outward and inward pivoting, relative to said rotatably mounted body, about a pivot point proximate one end of said elongated member.
A steering device for a bottomhole drilling assembly, comprising:
- a housing securable to a drill string;
- a body rotatably mounted with respect to said housing and carrying a plurality of circumferentially-spaced, selectively extendable and retractable arms;
- and
- a selectively expandable and contractable thrust pad disposed between at least a portion of each arm of said plurality of arms and a portion of said rotatably mounted body, each of said thrust pads including a material selectively expandable and contractable responsive to variance of a control input;
- wherein said material comprises a hydro-gel or a metal compound.
A steering device for a bottomhole drilling assembly, comprising:
- a housing securable to a drill string;
- and
- a body rotatably mounted with respect to said housing and carrying a plurality of circumferentially-spaced, selectively extendable and retractable arms, each arm of said plurality of arms being selectively extendable and retractable responsive to activation and deactivation of a thrust pad associated with that arm, each of said thrust pads comprising a hydro-gel activatable and deactivatable through variance of a control input selected from a group comprising electricity, heat, light, solvent concentration, ion composition, and pH.
A steering device for a bottomhole drilling assembly, comprising:
- a housing securable to a drill string;
- and
- a body rotatably mounted with respect to said housing and carrying a plurality of circumferentially-spaced, selectively extendable and retractable arms, each arm of said plurality of arms being selectively extendable and retractable responsive to activation and deactivation of a thrust pad associated with that arm, said thrust pads being comprised of metal responsive to variance of an electrical control input.
A steering device for a bottomhole drilling assembly, comprising:
- a housing securable to a drill string;
- and
- a body rotatably mounted with respect to said housing and carrying a plurality of circumferentially-spaced, selectively extendable and retractable arms, each arm of said plurality of arms being selectively extendable and retractable responsive to activation and deactivation of a thrust pad associated with that arm, each arm of said plurality of arms being hinged to said rotatably mounted body at a longitudinally remote location from the said thrust pad associated with that arm.
Dependencies are inferred from the claim text.