公开(公告)号：US5439331A

公开(公告)日：1995-08-08

申请号：US220730

申请日：1994-03-31

申请人： Bill D. Andrew ,  William D. Duwe ,  Michael L. Wilson

发明人： Bill D. Andrew ,  William D. Duwe ,  Michael L. Wilson

IPC分类号： B23G1/16 ,  B23B39/04 ,  B23B41/00 ,  B23B41/08 ,  F16L41/04

CPC分类号： F16L41/04 ,  Y10T408/16 ,  Y10T408/56275

摘要： An apparatus for tapping an opening into an existing pipeline that is under internal pressure including an elongated tapping machine body having means on one end for attachment to a pipeline, a boring bar having a rotatable feed screw therein by which the boring bar is axially positioned, and a pressure responsive valve actuated by differential pressure between the interior of a pipeline and the interior of the tapping machine body to control hydraulic pressure inside the tapping machine body to thereby counterbalance the hydraulic force applied to the boring bar.

摘要翻译： 一种用于将开口进入到处于内部压力下的现有管道中的装置，包括具有在一端上用于附接到管道上的装置的细长攻丝机主体，具有可旋转进给螺杆的钻杆，钻杆沿轴向定位， 以及通过管道内部和攻丝机本体内部之间的差压致动的压力响应阀，以控制攻丝机主体内的液压，从而抵消施加到镗杆的液压力。

公开(公告)号：US4815557A

公开(公告)日：1989-03-28

申请号：US66919

申请日：1987-06-25

申请人： William D. Duwe

发明人： William D. Duwe

IPC分类号： E21B23/04 ,  G01V1/135 ,  G01V11/00 ,  G01V1/40

CPC分类号： E21B23/04 ,  G01V1/135 ,  G01V11/005 ,  G01V1/52 ,  Y10S367/911

摘要： A seismic energy source provides a bias pressure and oscillating pressure force on a piston mounted transversely to the major axis of the well bore and in pressure contact with the wall of the well bore. A seismographic energy wave is generated in the surrounding earth by oscillating the pressure of the piston against the well wall. This apparatus uses the pressure of ambient fluid in the well bore to reduce the power required to provide pressure contact and to oscillate the piston against the wall.

摘要翻译： 地震能量源在垂直于井筒的长轴安装的活塞上并与井眼的壁压力接触的活塞上提供偏置压力和摆动压力。 通过使活塞的压力相对于井壁振动，在周围的地球中产生地震能量波。 该装置使用井眼中的环境流体的压力来降低提供压力接触所需的功率并使活塞相对于壁振荡。