公开(公告)号：US06427788B1

公开(公告)日：2002-08-06

申请号：US09668613

申请日：2000-09-22

Applicant: William D. Rauchenstein

Inventor： William D. Rauchenstein

IPC: E21B1026

CPC classification number: E21B10/322

Abstract: A drilling apparatus for underreaming includes a top sub, a pressure sleeve mated to the top sub, and a blade body mated to the pressure sleeve. A pilot bit is mated to the lower end of the blade body. A plurality of movable cutting blades are pivotably attached to the blade body by pivot pins. Each of the pins is inserted through the blade body and the cutting blade. Slidable covers, held in place by the pressure sleeve, are used to retain the pins. A mandrel is centrally positioned with respect to the pressure sleeve and the blade body and is axially movable therein. Each of the cutting blades includes an end which is operatively associated with channels transversely formed on one end of the mandrel. Movement of the mandrel in a first axial direction effects retraction of the cutting blades. Movement of the mandrel in a second axial direction effects extension of the cutting blades. The mandrel is held in its blade-retracting position by the biasing force of a spring. A build-up of hydraulic fluid, selectively delivered from the operator, in a pressure chamber formed between the pressure sleeve and the mandrel causes the mandrel to be moved to its blade-extending position when a critical mass of fluid pressure is achieved.

Abstract translation: 用于进一步加压的钻孔装置包括顶部辅助件，与顶部辅助件配合的压力套筒以及与压力套管配合的刀片体。 导向钻头与刀体的下端配合。 多个可移动切割刀片通过枢轴销枢转地附接到刀片主体。 每个销插入刀片主体和切割刀片。 通过压力套保持在适当位置的可滑动盖用于保持销。 心轴相对于压力套筒和叶片主体居中定位并且可在其中轴向移动。 每个切割刀片包括与横向形成在心轴的一端上的通道可操作地相关联的端部。 心轴在第一轴向方向上的运动实现切割刀片的缩回。 心轴在第二轴向方向上的移动影响切割刀片的延伸。 心轴通过弹簧的偏置力保持在其叶片回缩位置。 在压力套筒和心轴之间形成的压力室中，从操作者选择性地输送的液压流体的积聚使得在实现临界质量的流体压力时心轴移动到其叶片延伸位置。

公开(公告)号：US07677334B2

公开(公告)日：2010-03-16

申请号：US11741484

申请日：2007-04-27

Applicant: Curtis G. Blount ,  Charles D. Hailey ,  Tammy S. Halley, legal representative ,  William D. Rauchenstein

Inventor： Curtis G. Blount ,  Charles D. Hailey ,  William D. Rauchenstein

IPC: E21B7/00 ,  E21B4/00

CPC classification number: E21B4/18 ,  E21B17/07 ,  E21B17/076

Abstract: An anti-surge/reverse thrusting tool for reducing the forces on a drill bit used in subterranean well drilling operations along with methods for drilling wells using a drill string employing the tool. The tool utilizes the pressure differential between drilling fluid flowing through the tool and the fluid located in the well bore annulus proximate the tool to reduce the likelihood of drill bit stall. The tool generally comprises an outer housing and a piston assembly that is axially shiftable relative to the housing.

Abstract translation: 一种用于减少地下钻井操作中使用的钻头上的力的防喘振/反向推进工具，以及使用采用该工具的钻柱钻井的方法。 该工具利用流过工具的钻井液与位于靠近工具的井筒环中的流体之间的压差，以减少钻头失速的可能性。 工具通常包括外壳体和相对于壳体可轴向移动的活塞组件。

公开(公告)号：US20080264689A1

公开(公告)日：2008-10-30

申请号：US11741484

申请日：2007-04-27

Applicant: Curtis G. Blount ,  Charles D. Hailey ,  William D. Rauchenstein ,  Tammy S. Halley

Inventor： Curtis G. Blount ,  Charles D. Hailey ,  William D. Rauchenstein ,  Tammy S. Halley

IPC: E21B44/06

CPC classification number: E21B4/18 ,  E21B17/07 ,  E21B17/076

Abstract: An anti-surge/reverse thrusting tool for reducing the forces on a drill bit used in subterranean well drilling operations is provided along with methods for drilling wells using a drill string employing the tool. The tool utilizes the pressure differential between drilling fluid flowing through the tool and the fluid located in the well bore annulus proximate the tool to reduce the likelihood of drill bit stall. The tool generally comprises an outer housing and a piston assembly that is axially shiftable relative to the housing.

Abstract translation: 提供了用于减少地下钻井操作中使用的钻头上的力的防喘振/反向推进工具以及使用采用该工具的钻柱钻井的方法。 该工具利用流过工具的钻井液与位于靠近工具的井筒环中的流体之间的压差，以减少钻头失速的可能性。 工具通常包括外壳体和相对于壳体可轴向移动的活塞组件。