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    • 31. 发明公开
    • Continuous flow drilling systems and methods
    • 连续流动钻井系统和方法
    • EP2532828A3
    • 2013-11-06
    • EP12182726.5
    • 2008-07-25
    • Weatherford/Lamb Inc.
    • Iblings, DavidBailey, Thomas F.Bansal, Ram KumarSteiner, AdrianLynch, MichaelHarrall, Simon John
    • E21B19/16E21B21/10E21B21/12
    • E21B21/002E21B19/16E21B21/10E21B21/106E21B21/12E21B2034/005
    • In one embodiment, a method for drilling a wellbore includes injecting drilling fluid into a top of a tubular string disposed in the wellbore at a first flow rate. The tubular string includes: a drill bit disposed on a bottom thereof, tubular joints connected together, a longitudinal bore therethrough, and a port through a wall thereof. The drilling fluid exits the drill bit and carries cuttings from the drill bit. The cuttings and drilling fluid (returns) flow to the surface via an annulus defined between the tubular string and the wellbore. The method further includes rotating the drill bit while injecting the drilling fluid; remotely removing a plug from the port, thereby opening the port; and injecting drilling fluid into the port at a second flow rate while adding a tubular joint or stand of joints to the tubular string. The injection of drilling fluid into the tubular string is continuously maintained between drilling and adding the joint or stand to the drill string. The method further includes remotely installing a plug into the port, thereby closing the port. The first and second flow rates may be substantially equal or different.
    • 在一个实施例中,一种用于钻探井筒的方法包括以第一流速将钻井流体注入设置在井筒中的管柱的顶部。 管柱包括:设置在其底部的钻头,连接在一起的管状接头,穿过其中的纵向孔以及穿过其壁的端口。 钻井液离开钻头并携带来自钻头的钻屑。 钻屑和钻井液(返回)通过在管柱和井筒之间限定的环形空间流到地表。 该方法还包括在注入钻井液的同时旋转钻头; 从端口远程移除插头,从而打开端口; 以及以第二流速将钻井液注入端口,同时向管柱添加接头的管接头或支架。 在钻井和将接头或支架添加到钻柱之间连续保持钻井液注入管柱。 该方法还包括将插头远程安装到端口中,从而关闭端口。 第一和第二流率可以基本上相等或不同。