公开(公告)号：US5678634A

公开(公告)日：1997-10-21

申请号：US544371

申请日：1995-10-17

申请人： Hans H. Rehbock ,  Gerald Lynde ,  Ed Lueders ,  Bryan Franklin McKinley ,  John J. Johnson ,  Greg Nazzal

发明人： Hans H. Rehbock ,  Gerald Lynde ,  Ed Lueders ,  Bryan Franklin McKinley ,  John J. Johnson ,  Greg Nazzal

IPC分类号： E21B7/06 ,  E21B7/08 ,  E21B23/00

CPC分类号： E21B23/00 ,  E21B7/061

摘要： A retrieval tool for whipstocks is disclosed. A latch is retractable into the tool upon application of hydraulic pressure. A locking pin securely fastens the whipstock and retrieving tool together. The hydraulic pressure acts a cleaning force on the top of the whipstock and the retrieving slot to facilitate engagement. The offset stabilizer, when oriented opposite the lug on the retrieving tool, creates a force in the direction of the lug, whereby latching the retrieving tool will start. A joint of drillpipe or heavyweight drillpipe is run above the eccentric stabilizer. An offset stabilizer is provided to ensure proper initial orientation and avoid sticking the tool. The latch can firmly grip lugs within a slot in the whipstock. A overshot design is also disclosed using a similar hydraulically actuated latch assembly where the latch grabs the whipstock without having to use an opening therein, if for any reason the opening has been fouled with debris or damaged due to milling. Generally, release from the whipstock cannot occur unless hydraulic pressure is reapplied to release the latch and locking pin, thus allowing them to retract toward the body of the retrieval tool.

摘要翻译： 披露了一种造斜器的检索工具。 在施加液压压力时，闩锁可伸缩到工具中。 锁定销牢固地将造斜器和检索工具固定在一起。 液压作用在造斜器和回收槽的顶部上的清洁力以便于接合。 偏移稳定器当与检索工具上的凸耳相对定向时，在凸耳的方向上产生一个力，从而起动检索工具的闭锁。 钻杆或重型钻杆的关节在偏心稳定器上方运行。 提供偏移稳定器以确保正确的初始取向，并避免粘附工具。 闩锁可以牢牢地抓住造斜器中的槽中的凸耳。 还公开了使用类似的液压致动闩锁组件的过冲设计，其中闩锁抓住造斜器而不必在其中使用开口，如果由于任何原因，开口已经被碎屑弄脏或由于铣削而损坏。 通常，除了重新施加液压以释放闩锁和锁定销，从而允许它们朝着检索工具的主体缩回，否则不会发生从造斜器的释放。