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    • 2. 发明授权
    • Printer calibration system and method
    • 打印机校准系统和方法
    • US06829456B2
    • 2004-12-07
    • US10144088
    • 2002-05-10
    • Laurent A. RegimbalDavid E. Smith
    • Laurent A. RegimbalDavid E. Smith
    • G03G1500
    • G03G15/0194G03G2215/0119G03G2215/0158
    • A printer calibration system and method enables images to be properly aligned over a printable medium in printing systems that use (i) one or more non-ideally shaped image transfer elements and/or (ii) when the one or more image transfer elements behave eccentrically. The systems and methods greatly improve color plane registration and correct for repetitive alignment problems associated with image transfer elements. Non-circularity imperfections associated with image transfer elements are determined. Then the image transfer elements are moved at a non-constant angular velocity to compensate for the circular imperfections.
    • 打印机校准系统和方法使得能够在使用(i)一个或多个非理想形状的图像传送元件和/或(ii)当一个或多个图像传送元件偏心地行进的打印系统中的图像在可打印介质上正确对准时 。 这些系统和方法极大地改善了颜色平面配准,并纠正了与图像传输元件相关的重复对齐问题。 确定与图像转印元件相关联的非圆形缺陷。 然后,图像传送元件以非恒定角速度移动以补偿圆形缺陷。
    • 7. 发明授权
    • Return line mounted pump for riserless mud return system
    • 回流管式泵,用于立管泥浆返回系统
    • US07913764B2
    • 2011-03-29
    • US11833010
    • 2007-08-02
    • David E. SmithNils Lennart RollandHarald HufthammerRoger Stave
    • David E. SmithNils Lennart RollandHarald HufthammerRoger Stave
    • E21B7/12
    • E21B21/001E21B21/08E21B21/10
    • Systems and methods for drilling a well bore in a subsea formation from an offshore structure positioned on a water surface with a drill string that is suspended from the structure and includes a bottom hole assembly adapted to form a top hole portion of the well bore. A drilling fluid source on the offshore structure supplies drilling fluid through the drill string to the bottom hole assembly where the drilling fluid exits from the bottom hole assembly during drilling and returns up the well bore. A suction module is disposed at the sea floor and collects the drilling fluid emerging from the well bore. A pump module is disposed on a return line, which is in fluid communication with the suction module, at a position below the water surface and above the sea floor. The pump module is operable to receive drilling fluid from the suction module and pump the drilling fluid through the return pipe to the same offshore structure or a different offshore structure.
    • 用于从位于水面上的海上结构的海底结构钻井井的系统和方法,所述钻井钻柱从所述结构悬挂并且包括适于形成所述井孔的顶孔部分的底孔组件。 海上结构上的钻井液源将钻井液通过钻柱提供给井底组件,在钻井过程中钻井液在钻井期间从井底组件中排出并返回井眼。 抽吸模块设置在海底,并收集从井筒出来的钻井液。 泵模块设置在与吸水模块流体连通的返回管线上,位于水面下方和海底上方。 泵模块可操作以从抽吸模块接收钻井液,并将钻井液通过返回管泵送到相同的海上结构或不同的海上结构。