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    75.
    发明专利
    未知

    公开(公告)号：NO20071421L

    公开(公告)日：2007-04-10

    申请号：NO20071421

    申请日：2007-03-16

    Applicant: BAKER HUGHES INC

    Inventor： ARONSTAM PETER S ,  KRUEGER VOLKER ,  FINCHER ROGER W ,  GRIMMER HARALD ,  KRUEGER SVEN ,  WATKINS LARRY A ,  FONTANA PETER

    IPC: E21B21/08 ,  B63B21/50 ,  E21B7/00 ,  E21B7/12 ,  E21B7/128 ,  E21B7/28 ,  E21B17/20 ,  E21B19/00 ,  E21B19/09 ,  E21B19/22 ,  E21B21/00 ,  E21B21/10 ,  E21B33/076 ,  E21B43/12

    Abstract: An active differential pressure device (APD device) in fluid communication with a returning fluid creates a differential pressure across the device, which controls pressure below the APD Device. In embodiments, a control unit controls the APD Device to provide a selected pressure differential at a wellbore bottom, adjacent a casing shoe, in an intermediate wellbore location, or in a casing. In one arrangement, the control system is pre-set at the surface such that the APD Device provides a substantially constant pressure differential. In other arrangements, the control system adjusts an operating parameter of the APD Device to provide a desired pressure differential in response to one or more measured parameters. Devices such as an adjustable bypass can be used to control the APD Device. In other embodiments, one or more flow control devices coupled to the return fluid reduce the effective pressure differential provided by the APD Device.

    Apparatus and methods for self-powered communication and sensor network
    76.
    发明专利
    Apparatus and methods for self-powered communication and sensor network 未知

    公开(公告)号：GB2430688A

    公开(公告)日：2007-04-04

    申请号：GB0625466

    申请日：2005-06-14

    Applicant: BAKER HUGHES INC

    Inventor： CHEMALI ROLAND E ,  KRUEGER VOLKER ,  ARONSTAM PETER S ,  WATKINS LARRY A ,  FINCHER ROGER

    IPC: E21B17/02 ,  E21B41/00 ,  E21B47/12 ,  E21B47/14 ,  E21B47/16 ,  G01V11/00

    Abstract: A system for communicating between a first location and a second location comprises a jointed tubular string (4) having a first section (21) and a second section (22) connected at a connection joint (4), with the tubular string having a fluid (11) in an internal passage thereof. A first acoustic transducer (23) is mounted in the internal passage of the first section (21) proximate the connection joint (4), and a second acoustic transducer (25) is mounted in the internal passage of the second section (22) proximate the connection joint (4). A signal transmitted from the first location to the second location is transmitted across the connection joint as an acoustic signal in the fluid (11) from the first acoustic transducer (23) to the second acoustic transducer (25).

    Apparatus and method for self-powered communication and sensor network
    77.
    发明专利
    Apparatus and method for self-powered communication and sensor network 未知

    公开(公告)号：GB2419365A

    公开(公告)日：2006-04-26

    申请号：GB0526058

    申请日：2004-06-14

    Applicant: BAKER HUGHES INC

    Inventor： FINCHER ROGER ,  ARONSTAM PETER S ,  WATKINS LARRY A ,  GOLD RANDY

    IPC: E21B41/00 ,  E21B47/12 ,  E21B47/16

    Abstract: A measurement and communication system for use with a tubular string (3), comprises a tubular string having a plurality of self-powered, autonomous telemetry stations (20) disposed at predetermined locations along the tubular string. Each autonomous telemetry station is adapted to receive (25) at least one first signal and transmit (23) at least one second signal related to the at least one first signal. Power is extracted from potential energy sources proximate each autonomous telemetry station. A method of communicating information along a tubular string comprises, disposing an autonomous telemetry station at predetermined locations along the tubular string. A preferred transmission path is autonomously determined at each of the autonomous telemetry stations. Information is transmitted along the tubular string according to the autonomously determined preferred path.

    Drilling fluid circulation system and method
    79.
    发明专利
    Drilling fluid circulation system and method 未知

    公开(公告)号：GB2411921A

    公开(公告)日：2005-09-14

    申请号：GB0510605

    申请日：2005-05-24

    Applicant: BAKER HUGHES INC

    Inventor： WATKINS LARRY A ,  FONTANA PETER ,  FINCHER ROGER ,  ARONSTAM PETER S

    IPC: E21B21/00 ,  E21B21/08

    Abstract: The present invention provides drilling systems for drilling wellbores. The drilling system includes an umbilical that passes through a wellhead and carries a drill bit. A drilling fluid system (18) supplies drilling fluid into an annulus (35) (supply line) between the umbilical and the wellbore, which discharges at the drill bit bottom and returns to the wellhead through the umbilical (return line) (24) carrying the drill cuttings. A fluid circulation device (30), such as a turbine or centrifugal pump, is operated in the return line to provide the primary motive force for circulating drilling fluid through a fluid circuit formed by the supply line (22) and return line (24). Optionally, a secondary fluid circulation device in fluid communication with the return line can cooperate with the fluid circulation device to circulate drilling fluid and/or a near bit fluid circulation device can be used to provide localized flow control or suction pressure to improve bit cleaning.

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