公开(公告)号：US06318466B1

公开(公告)日：2001-11-20

申请号：US09519445

申请日：2000-03-06

申请人： Herve Ohmer ,  Mark W. Brockman ,  Platon Koptilov ,  Adrian Vuyk, Jr.

发明人： Herve Ohmer ,  Mark W. Brockman ,  Platon Koptilov ,  Adrian Vuyk, Jr.

IPC分类号： E21B2906

CPC分类号： E21B7/061 ,  E21B29/06

摘要： A method and apparatus that comprises releasably securing a milling tool to a deflecting tool using a securing mechanism. The securing mechanism comprises a member that is adapted to be broken by milling action of the milling tool. In addition, in some arrangements, a protective mechanism protects abrasive inserts on a pilot mill of the milling tool.

摘要翻译： 一种方法和装置，其包括使用固定机构将铣削工具可释放地固定到偏转工具。 固定机构包括适于通过铣削工具的铣削作用而被破坏的构件。 此外，在一些布置中，保护机构保护研磨刀片在研磨工具的先导磨机上。

公开(公告)号：US06267179B1

公开(公告)日：2001-07-31

申请号：US09518350

申请日：2000-03-03

申请人： Herve Ohmer ,  Platon Koptilov ,  Mark W. Brockman

发明人： Herve Ohmer ,  Platon Koptilov ,  Mark W. Brockman

IPC分类号： E21B2906

CPC分类号： E21B7/061 ,  E21B29/06

摘要： A method and apparatus for predictable downhole milling of a casing window having predetermined location, orientation, dimension and contour geometry. An elongate substantially rigid milling shaft has at least one casing window milling element in fixed relation therewith and has a pilot mill in articulated and rotary driven connection with the milling shaft. The milling shaft is in articulated and rotary driven connection with a rotary drive mechanism. The articulated connection of the pilot mill and milling shaft may incorporate an articulation control system to permit the pilot mill to be maintained substantially coaxial with the milling shaft so that its trajectory at a predetermined stage of window milling can be controlled by the milling shaft when positive guiding by a deflecting tool can no longer be ensured. The deflecting tool is adapted to be set within the well casing and defines an inclined pilot mill guide surface for guiding the pilot mill along a predetermined inclined trajectory for milling into the well casing. The deflecting tool incorporates a generally cylindrical bearing for guiding and providing rotational stabilization to the pilot mill during initial window milling to ensure the accuracy of the pilot bore being milled through the well casing and into the surrounding formation. During window milling the pilot mill guides the milling shaft so that the string mills of the milling shaft remove a portion of the pilot mill guide bearing and form a guide face of predetermined contour on the deflecting tool for guiding other tools through the casing window and into the lateral bore. The deflecting tool may be of tubular geometry so as to guide not only the pilot mill but also the string mill and may also receive the rotary drive motor for guiding and stabilizing thereof.

摘要翻译： 一种具有预定位置，方向，尺寸和轮廓几何形状的壳体窗口可预测井下铣削的方法和装置。 细长的基本上刚性的铣削轴具有与其固定关系的至少一个壳体窗铣削元件，并且具有与铣削轴铰接和旋转驱动连接的先导磨。 铣削轴与旋转驱动机构铰接和旋转驱动连接。 先导磨机和铣削轴的铰接连接可以包括铰接控制系统，以允许先导磨机与铣削轴保持基本上同轴，使得其在窗铣的预定阶段的轨迹可以由铣削轴当正时 不能确保由偏转工具引导。 偏转工具适于设置在井套内并且限定倾斜的先导式轧机引导表面，用于沿着预定的倾斜轨迹引导先导式铣刀，用于铣削到井套管中。 偏转工具包括一个大体上圆柱形的轴承，用于在初始窗铣过程中引导和提供旋转稳定性到先导式磨机，以确保先导孔的精度通过井套被铣削并进入周围地层。 在铣削铣削期间，先导铣刀引导铣削轴，使得铣削轴的线铣刀移除导向铣刀导向轴承的一部分，并在偏转工具上形成预定轮廓的引导面，用于引导其他工具穿过套管窗口并进入 横向孔。 偏转工具可以是管状几何形状，以便不仅引导先导磨机而且还引导串磨机，还可以接收用于引导和稳定旋转驱动马达。