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1.发明申请公开(公告)号：US20090283322A1
公开(公告)日：2009-11-19
申请号：US12227661
申请日：2007-06-26
申请人： Norval R. Dove
发明人： Norval R. Dove
CPC分类号： E21B17/06
摘要： A back-off sub apparatus is disclosed. The apparatus includes a connection connecting a rotational section and a non-rotational section. The rotational section is designed to be rotated via a ball dropped into the well under sufficient pressure to cause the rotational section to rotate relative to the non-rotational section supplying a controlled and sufficient torque to the connection to break the connection. The connection then is unthreaded by normal surface action. The disconnected or upper section of the apparatus and the drill string section associated with it can be withdrawn from the well leaving the lower portion and the drill string section associated with it in the well.
摘要翻译： 公开了一种退避子装置。 该装置包括连接旋转部分和非旋转部分的连接。 旋转部分设计成通过在足够的压力下落入井中的球旋转，以使旋转部分相对于非旋转部分旋转，从而向连接提供受控且足够的扭矩以断开连接。 然后通过正常的表面动作使连接无法连接。 设备的断开或上部和与之相关联的钻柱部分可以从井中排出，并将井下部和钻柱段相关联。
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公开(公告)号：US5632349A
公开(公告)日：1997-05-27
申请号：US607325
申请日：1996-02-26
申请人： Norval R. Dove , Stephen K. Smith , W. Gerald Lott
发明人： Norval R. Dove , Stephen K. Smith , W. Gerald Lott
摘要： A drill bit for removing a surface subject to a subsurface pressure and an environmental surface pressure at least equal to the subsurface pressure, which comprises jetting fluid through a nozzle facing and located a predetermined distance from said surface, said nozzle being shaped to eject the fluid in a steam having a higher core pressure than said environmental pressure, said higher pressure stream having adjacent thereto at least one zone of pressure negative relative to said subsurface pressure, said distance being predetermined to expose said surface to said zone of negative pressure, whereby said surface is caused to explode into said zone of negative pressure from the force of said subsurface pressure.
摘要翻译： 一种钻头，用于去除经受地下压力的表面和至少等于地下压力的环境表面压力，该钻头包括通过面向并位于距离所述表面预定距离的喷嘴喷射流体，所述喷嘴被成形为喷射流体 在具有比所述环境压力更高的芯压的蒸汽中，所述较高压力流具有与其相邻的至少一个压力相对于所述地下压力的负压区域，所述距离被预定为将所述表面暴露于所述负压区域，由此所述 由所述地下压力引起表面从所述负压区域爆炸。
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公开(公告)号：US5494124A
公开(公告)日：1996-02-27
申请号：US134085
申请日：1993-10-08
申请人： Norval R. Dove , Stephen K. Smith
发明人： Norval R. Dove , Stephen K. Smith
摘要： A method and abstract of removing a surface subject to a subsurface pressure and an environmental surface pressure at least equal to the subsurface pressure, which comprises jetting fluid through a nozzle facing and located a predetermined distance from said surface, said nozzle being shaped to eject the fluid in a steam having a higher core pressure than said environmental pressure, said higher pressure stream having adjacent thereto at least one zone of pressure negative relative to said subsurface pressure, said distance being predetermined to expose said surface to said zone of negative pressure, whereby said surface is caused to explode into said zone of negative pressure from the force of said subsurface pressure.
摘要翻译： 一种去除表面压力和至少等于地下压力的环境表面压力的表面的方法和摘要，其包括通过面向并位于距离所述表面预定距离的喷嘴喷射流体，所述喷嘴被成形为喷射 在具有比所述环境压力更高的芯压的蒸汽中的流体，所述较高压力流具有相邻的压力至少一个相对于所述地下压力的负压区域，所述距离被预定为将所述表面暴露于所述负压区域，由此 所述表面从所述地下压力的力引起到所述负压区域中。
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