公开(公告)号：US5109925A

公开(公告)日：1992-05-05

申请号：US642491

申请日：1991-01-17

申请人： Lee W. Stepp ,  Richard L. Giroux ,  Joseph B. Crump ,  Jerome F. Borges

发明人： Lee W. Stepp ,  Richard L. Giroux ,  Joseph B. Crump ,  Jerome F. Borges

IPC分类号： E21B33/127 ,  E21B33/14 ,  E21B33/16

CPC分类号： E21B33/16 ,  E21B33/127 ,  E21B33/146

摘要： A multiple stage inflation packer with secondary opening rupture disc. The inflatable packer comprises a case with a closing sleeve, an opening sleeve and a releasing sleeve therein. An opening plug is dropped into the casing string and is allowed to free fall, or is pumped down, to actuate the opening sleeve to allow inflation of the packer element. A back check valve prevents the packer from deflating. After the packer is inflated, additional pressure is applied which ruptures a rupture disc to open a port to the well annulus above the set packer element. Cementing may be carried out through this port, and after the cementing operation, a closing plug is pumped down the well casing behind the cement to actuate the releasing sleeve and move the closing sleeve to seal off the ports. Another check valve insures that pressure is equalized on both sides of the rupture disc as the packer is run into the well bore. After cementing is complete, the center of the packer may be drilled out, leaving the closing sleeve to permanently seal the ports.

摘要翻译： 具有次级开口破裂盘的多级膨胀包装机。 充气封隔器包括具有闭合套筒的壳体，开口套筒和其中的释放套筒。 打开塞子落入套管柱中并被允许自由下落或被抽下来致动开启套筒以允许封隔器元件的膨胀。 后止回阀防止包装机放气。 在封隔器膨胀之后，施加额外的压力，其破裂破裂盘以将端口打开到设置的封隔器元件上方的井环。 可以通过该端口进行水泥化，并且在固井操作之后，将密封塞从水泥井下方的井套管中泵送以致动释放套筒并移动关闭套筒以密封端口。 另一个止回阀确保当隔离器进入井眼时，破裂盘两侧的压力相等。 固井完成后，可以钻出封隔器的中心，使密封套永久密封。