Hydraulic-pneumatic weight control and compensating apparatus
    1.
    发明授权
    Hydraulic-pneumatic weight control and compensating apparatus 失效
    液压气动重量控制和补偿装置

    公开(公告)号:US3718316A

    公开(公告)日:1973-02-27

    申请号:US3718316D

    申请日:1970-09-04

    发明人: LARRALDE E BEAUFORT R

    摘要: Apparatus automatically compensating for relative vertical movement between a hoisting or supporting mechanism and a load carried thereby, which load, for example, may be a running string connected to a drill bit used in drilling a sub-aqueous well bore, the mechanism supporting the running string being mounted on a floating vessel anchored over the well bore. The compensating apparatus includes a cylinder and piston device containing a hydraulic fluid exerting a lifting or tensioning force on the running string, or other load, the pressure on the hydraulic fluid being maintained generally constant by a gaseous medium despite relative axial movement between the cylinder and piston portions of the device, that might result from heaving of the vessel due to wind and wave action, or the lowering of the running or drilling string as the bit drills the hole.

    摘要翻译: 设备自动补偿提升或支撑机构与由此承载的负载之间的相对垂直运动,该负载例如可以是连接到用于钻探次水下井的钻头的运行柱,该机构支撑运行 弦安装在锚定在井眼上的浮动船上。 补偿装置包括气缸和活塞装置,其包含在运行管柱或其它负载上施加提升或张紧力的液压流体,尽管气缸和缸体之间的相对轴向运动,液压流体上的压力通常保持恒定, 该装置的活塞部分可能由于风和波浪作用而导致容器的起伏,或者钻头钻孔时降低了行进或钻柱。