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    • 2. 发明公开
    • Safety pipe string elevator
    • SicherheitselevatorfürBohrgestänge。
    • EP0589823A1
    • 1994-03-30
    • EP93630063.1
    • 1993-09-02
    • VARCO INTERNATIONAL, INC.
    • Busink, Cornelis LodewijkMason, David Brianvan Rijzingen, Johannes Wilhelmus
    • E21B19/06
    • E21B19/06E21B19/07
    • The elevator (10) for supporting a string of pipe (15) in a well rig is actuable between a closed condition for gripping of the pipe (15) and an open condition, and includes a safety device for preventing opening of the elevator (10) when a string of pipe (15) is positioned in and supported by the elevator (10), to thus prevent accidental dropping of the string (15) into a well. The elevator (10) may be opened and closed by air pressure, with the safety device preferably including a sensing element positioned to respond to the presence of a well pipe (15) in the elevator (10) at a location to be supported thereby, and valve (67) actuable by the sensing element to control the delivery of pressure fluid to the elevator (10).
    • 用于在钻井平台中支撑一排管子(15)的升降机(10)在用于夹紧管道(15)的关闭状态和打开状态之间可启动,并且包括用于防止电梯(10)的打开的安全装置 )当一串管道(15)被定位在电梯(10)中并由电梯(10)支撑时,从而防止将绳子(15)意外掉入井中。 电梯(10)可以通过空气压力打开和关闭,安全装置优选地包括感测元件,该感测元件定位成响应于在其中被支撑的位置处的电梯(10)中的井管(15)的存在, 以及由感测元件致动的阀(67),以控制到电梯(10)的压力流体的输送。