公开(公告)号：US09915121B2

公开(公告)日：2018-03-13

申请号：US14740670

申请日：2015-06-16

申请人： BAKER HUGHES INCORPORATED

发明人： Christopher J. Limb ,  Larry J. Urban ,  Frank Maenza

IPC分类号： E21B33/128 ,  E21B33/129

CPC分类号： E21B33/128 ,  E21B33/129

摘要： A retrievable packer has its sealing system unloaded before the slip system is relaxed by separation of slip cones from slips that flank the seal assembly. The mandrel is cut so that the portion above the cut can be raised to take a cone up and away from collet heads which previously were trapped by the cone. The collet heads are disposed between opposed sloping surfaces so that the retraction of the cone from under the heads allows the residual rubber pressure to force the heads toward the mandrel into the space created by relative movement of the mandrel that took the wedge cone uphole. The heads are at ends of fingers having a radially inward bias to further assist retraction of the heads toward the mandrel. With the heads retracted the sealing element stretches out before slip cones are moved relative to the slips.

公开(公告)号：US20170122063A1

公开(公告)日：2017-05-04

申请号：US14928597

申请日：2015-10-30

申请人： BAKER HUGHES INCORPORATED

发明人： Larry J. Urban ,  Gary L. Anderson

IPC分类号： E21B33/129 ,  E21B23/01

CPC分类号： E21B33/1293 ,  E21B23/01 ,  E21B33/128

摘要： A retrievable compression set packer is sequentially released. First the sealing element is allowed to relax. Then the upper slip has wedging action that forces it against a surrounding tubular relaxed. After that the upper slips are pulled up to retract them fully allowing the packer to come out. These sequential actions are done with a mandrel movement in one direction. The sealing element is released with undermining a collet by aligning collet heads with a recess on the mandrel. The slip force release happens with mandrel movement forcing a ring into a wedge such that circumferential force on slip segments is reduced or eliminated when the wedge is pushed out of its conforming slot allowing for circumferential flexibility of the slip seat. The mandrel then picks up a slip ring that retracts the slip segments on the slip seat and the packer is removed.

公开(公告)号：US20160369585A1

公开(公告)日：2016-12-22

申请号：US14740670

申请日：2015-06-16

申请人： BAKER HUGHES INCORPORATED

发明人： Christopher J. Limb ,  Larry J. Urban ,  Frank Maenza

IPC分类号： E21B33/128 ,  E21B33/129

CPC分类号： E21B33/128 ,  E21B33/129

摘要： A retrievable packer has its sealing system unloaded before the slip system is relaxed by separation of slip cones from slips that flank the seal assembly. The mandrel is cut so that the portion above the cut can be raised to take a cone up and away from collet heads which previously were trapped by the cone. The collet heads are disposed between opposed sloping surfaces so that the retraction of the cone from under the heads allows the residual rubber pressure to force the heads toward the mandrel into the space created by relative movement of the mandrel that took the wedge cone uphole. The heads are at ends of fingers having a radially inward bias to further assist retraction of the heads toward the mandrel. With the heads retracted the sealing element stretches out before slip cones are moved relative to the slips.

摘要翻译： 可回收的封隔器在通过将滑动锥体与密封组件侧面的滑移件分离之前松开滑动系统之前将其密封系统卸载。 心轴被切割，使得切口上方的部分可以升高以使锥体向上并远离预先被锥体捕获的夹头。 夹头位于相对的倾斜表面之间，使得锥体从头下方缩回允许残余的橡胶压力将头朝向心轴压入通过将楔形锥体的孔的相对运动产生的空间中。 头部在具有径向向内偏置的手指的端部，以进一步辅助头朝向心轴的缩回。 随着头部缩回，密封元件在滑动锥体相对于滑动件移动之前伸出。