公开(公告)号：US5340182A

公开(公告)日：1994-08-23

申请号：US941233

申请日：1992-09-04

申请人： Cornelis L. Busink ,  Johannes W. H. van Rijzingen ,  David B. Mason

发明人： Cornelis L. Busink ,  Johannes W. H. van Rijzingen ,  David B. Mason

IPC分类号： E21B19/06 ,  E21B19/07

CPC分类号： E21B19/06 ,  E21B19/07

摘要： An elevator for supporting a string of pipe in a well rig is actuable between a closed condition for gripping of the pipe and an open condition, and includes a safety device for preventing opening of the elevator when a string of pipe is positioned in and supported by the elevator, to thus prevent accidental dropping of the string into a well. The elevator 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 in the elevator at a location to be supported thereby, and a valve actuable by the sensing element to control the delivery of pressure fluid to the elevator.

摘要翻译： 用于在钻井平台中支撑一串管子的升降机在用于夹持管道的打开状态和打开状态的关闭状态之间是可启动的，并且包括用于当一排管被定位并由其支撑时防止电梯打开的安全装置 电梯，从而防止字符串意外掉入井中。 电梯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，该感测元件被定位成响应于在其中被支撑的位置处的电梯中的井管的存在，以及由感测元件致动的阀门 控制向电梯输送压力流体。