公开(公告)号：US06439319B1

公开(公告)日：2002-08-27

申请号：US09517967

申请日：2000-03-03

申请人： Steven W. Wentworth ,  Robert F. Crane ,  Randy R. Runquist ,  Mark K. Van Houwelingen

发明人： Steven W. Wentworth ,  Robert F. Crane ,  Randy R. Runquist ,  Mark K. Van Houwelingen

IPC分类号： E21B706

CPC分类号： E21B10/56 ,  E21B4/14 ,  E21B7/068 ,  E21B47/02

摘要： A drill head for an apparatus for directional boring according to the invention includes a bit, a holder for a device for detecting angular orientation of the bit, and a hammer including a striker for delivering impacts to the bit, wherein the bit assembly, holder and hammer are connected head to tail with the bit at a front end. The bit of the invention has a frontwardly facing main cutting surface having a plurality of main cutting teeth disposed thereon and a gage tower extending radially outwardly from the main cutting surface, which gage tower has at least one frontwardly facing gage cutting tooth thereon suitable for cutting over an angle defined by less than a full rotation of the bit. The device for detecting angular orientation is in a predetermined alignment with the gage tower so that it determines the orientation of the gage tower relative to the axis of rotation of the drill head. A starter rod may be used to connect the holder to the string, and the hammer generally follows immediately behind the bit, so that order of components from front to rear is bit, hammer, holder and starter rod. In one preferred embodiment, the main cutting surface is substantially flat and circular and has fluid ejection ports thereon, and the drill head has passages for conducting a drill fluid therethrough to the ejection ports. In another preferred embodiment, the bit has a heel on an outer side surface thereof at a position opposite the gage tower, which heel slopes inwardly from back to front. The heel aids in steering the bit in both rock and soil. Such a drill head can be used for directional boring in mixed conditions including soil, soft rock and even hard rock.

公开(公告)号：US5778991A

公开(公告)日：1998-07-14

申请号：US705007

申请日：1996-08-29

申请人： Randy R. Runquist ,  James R. Rankin ,  Mark VanHouwelingen

发明人： Randy R. Runquist ,  James R. Rankin ,  Mark VanHouwelingen

IPC分类号： E21B7/06 ,  E21B7/08 ,  E21B10/56

CPC分类号： E21B10/56 ,  E21B7/064

摘要： A directional boring apparatus is disclosed where the apparatus is controlled through a method which includes deviating a drill head from a straight path into a desired direction angled away from the straight path. The deviation is achieved by applying an axial force to the drill head when a drill head cutting member is positioned within an arc of rotation through which the desired direction passes. The drill head is retracted when the cutting member is outside of the arc of rotation.

摘要翻译： 公开了一种定向钻孔装置，其中通过包括将钻头从直线路径偏离到远离直线路径的期望方向的方法来控制装置。 当钻头切割构件定位在期望方向通过的旋转弧内时，通过向钻头施加轴向力来实现偏差。 当切割构件在旋转弧之外时，钻头缩回。