公开(公告)号：US20050145417A1

公开(公告)日：2005-07-07

申请号：US10999811

申请日：2004-11-30

申请人： Steven Radford ,  Kelly Ireland ,  Robert Laing ,  Daryl Pritchard ,  James Overstreet ,  Greg Presley ,  Scott Shu ,  Mark Anderson ,  Mathias Mueller

发明人： Steven Radford ,  Kelly Ireland ,  Robert Laing ,  Daryl Pritchard ,  James Overstreet ,  Greg Presley ,  Scott Shu ,  Mark Anderson ,  Mathias Mueller

IPC分类号： E21B10/32 ,  E21B34/14 ,  E21B7/28

CPC分类号： E21B10/322 ,  E21B4/00 ,  E21B4/04 ,  E21B7/00 ,  E21B10/32 ,  E21B17/1014 ,  E21B34/14 ,  E21B44/005 ,  E21B47/18 ,  E21B2034/007

摘要： An expandable reamer apparatus and methods for reaming a borehole are disclosed, including at least one laterally movable blade carried by a tubular body selectively positioned at an inward position and an expanded position. The at least one movable blade, held inwardly by at least one blade-biasing element, may be forced outwardly by drilling fluid selectively allowed to communicate therewith or by at least one intermediate piston element. For example, an actuation sleeve may allow communication of drilling fluid with the at least one movable blade in response to an actuation device being deployed within the drilling fluid. Alternatively, a chamber in communication with an intermediate piston element in structural communication with the movable blade may be pressurized by way of a movable sleeve, a downhole turbine, or a pump.

摘要翻译： 公开了一种用于铰孔钻孔的可扩展铰刀装置和方法，包括至少一个横向可移动的刀片，其由选择性地定位在向内位置和扩张位置的管状体承载。 通过至少一个叶片偏置元件保持在内部的至少一个可动刀片可以通过钻选择性地允许与其连通的流体或通过至少一个中间活塞元件而被向外推动。 例如，致动套筒可以允许钻井流体与至少一个可动刀片响应于在钻井液体内展开的致动装置的连通。 或者，与可移动刀片结构连通的中间活塞元件连通的腔室可以通过可移动套筒，井下涡轮机或泵来加压。