公开(公告)号：US06244340B1

公开(公告)日：2001-06-12

申请号：US09159530

申请日：1998-09-23

Applicant: Jody R. McGlothen ,  Daniel J. Themig ,  Robert T. Brooks ,  Dan P. Saurer ,  Colin M. MacRae ,  David J. Steele ,  William Sloane Muscroft ,  Denis C. Desranleau

Inventor： Jody R. McGlothen ,  Daniel J. Themig ,  Robert T. Brooks ,  Dan P. Saurer ,  Colin M. MacRae ,  David J. Steele ,  William Sloane Muscroft ,  Denis C. Desranleau

IPC: E21B4700

CPC classification number: E21B23/04 ,  E21B23/002 ,  E21B41/0035 ,  E21B47/09 ,  E21B47/091

Abstract: A self-locating reentry system is provided to allow reliable reentry from a primary wellbore into one or more secondary wellbores. The reentry system may include one or more self-locating assemblies which may be engaged with selected portions of a lateral opening disposed between the primary wellbore and a respective secondary wellbore. Each self-locating assembly and respective key or lug cooperate with each other to provide optimum location and alignment relative to the lateral opening for communication of well tools and smaller diameter tubing strings between the primary wellbore and the associated secondary wellbore. A retaining mechanism is preferably provided to maintain the locator lug or key in its first retracted position until the reentry system is at a desired downhole location relative to the selected lateral opening.

Abstract translation: 提供自定位再入系统以允许从主井筒到一个或多个次级井筒的可靠的再入。 折返系统可以包括一个或多个自定位组件，其可以与设置在主井眼和相应的次井眼之间的侧向开口的选定部分接合。 每个自定位组件和相应的键或凸耳彼此配合以提供相对于侧向开口的最佳位置和对准，用于在主井眼和相关联的次井眼之间的井工具和较小直径的油管柱的连通。 优选地提供保持机构以将定位器凸耳或键保持在其第一缩回位置，直到再入系统相对于所选择的横向开口处于期望的井下位置。