公开(公告)号：WO2003100209A1

公开(公告)日：2003-12-04

申请号：PCT/US2003/015366

申请日：2003-05-15

Applicant: WEATHERFORD/LAMB, INC.

Inventor： HOSIE, David ,  BANSAL, RK ,  CUTHBERTSON, Robert, L.

IPC: E21B21/10

CPC classification number: E21B21/08 ,  E21B21/10 ,  E21B33/03 ,  E21B2021/006

Abstract: A method and an apparatus for a dynamic mudcap drilling and well control comprises of a tubular body (185) disposable in a well casing (180) forming an outer annulus (155) there between and an inner annulus (150) formable between the body and a drill string (190) disposed therein. The apparatus further includes a sealing member (110) to seal the inner annulus at a location above a lower end of the tubular body and a pressure control member (150) disposable in the inner annulus at a location above the lower end of the tubular body. In another embodiment, the assembly uses two rotating control heads (RCH, RBOP) (110, 115), one at the top of the wellhead assembly in a conventional manner and a specially designed downhole unit. Thus, creating dual barriers. Finally, the assembly provides a method for allowing the well to produce hydrocarbons while tripping the drill string.

Abstract translation: 用于动态泥浆钻井和井控制的方法和设备包括：管状体（185），其在一个井壳体（180）中可弃置，形成在其间的外环（155）和内环（150）之间，该内环可形成在主体和 设置在其中的钻柱（190）。 所述装置还包括密封构件（110），用于在所述管状体的下端上方的位置处密封所述内环状空间;以及压力控制构件（150），其在所述内环形空间中在所述管状体的下端 。 在另一个实施例中，组件使用两个旋转控制头（RCH，RBOP）（110,115），一个在井口组件的顶部以常规方式和一个专门设计的井下单元。 因此，创造双重障碍。 最后，组件提供了一种允许井在产生钻杆的同时产生烃的方法。

公开(公告)号：WO2003100208A1

公开(公告)日：2003-12-04

申请号：PCT/US2003/016686

申请日：2003-05-28

Applicant: WEATHERFORD/LAMB, INC.

Inventor： HOSIE, David ,  BANSAL, RK ,  MOYES, Peter, B.

IPC: E21B21/08

CPC classification number: E21B4/02 ,  E21B21/00 ,  E21B21/08 ,  E21B2021/006

Abstract: The present invention generally provides apparatus and methods for reducing the pressure of a circulating fluid in a wellbore. In one aspect of the invention an ECD (equivalent circulation density) reduction tool provides a means for drilling extended reach deep (ERD) wells with heavyweight drilling fluids by minimizing the effect of friction head on bottomhole pressure so that circulating density of the fluid is close to its actual density. With an ECD reduction tool located in the upper section of the well, the friction head is substantially reduced, which substantially reduces chances of fracturing a formation.

Abstract translation: 本发明通常提供用于降低井眼中循环流体的压力的装置和方法。 在本发明的一个方面，ECD（等效循环密度）减小工具提供了一种用于通过最小化摩擦头对井底压力的影响来钻出具有重型钻井液的延伸到达深（ERD）井的装置，使得流体的循环密度接近 到其实际密度。 使用位于井的上部的ECD减速工具，摩擦头基本上减小，这大大减少了压裂地层的机会。