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61. 发明公开

EP0020091A1 Drilling jar 失效
标题翻译： SchlagschieberfürBohrloch。
公开(公告)号：EP0020091A1
公开(公告)日：1980-12-10
申请号：EP80301693.0
申请日：1980-05-22
申请人： INTORALA LTD.
发明人： Ferrier, John Eric
IPC分类号： E21B31/113 , F16F15/03
CPC分类号： F16F9/532 , E21B31/005 , E21B31/113
摘要： This invention relates to a drilling jar. Known drilling jars are of only limited efficiency.
According to the present invention a drilling jar has a member (1) for receiving a mechanical impact and a second member (2) for transmitting a force in response to said impact, said second member (2) being slidable relative to said first member (1) in use of the drill jar in a longitudinal direction parallel to the direction of drilling, between an extended position and a contracted position, passage means (3) for containing electro-viscous fluid extending between said first and second members (12) and/or from a relief chamber (5) whose capacity is reduced when said members move towards said contracted position, electrical field generation means (12) disposed adjacent said passage means for producing an alternating current electrical field in electro-viscous fluid in said passage means (3) in use of the drill jar; sensing means arranged for directly or indirectly sensing at least one of impact on said first member (1) and relative movement between said members (12) from said extended position towards said contracted position; and control means arranged for activating said electric field generation means (12, 13) in response to said sensing by said sensing means so that passage of electro-viscous fluid through the passage means (3) during contraction is periodically restrained whereby an impact on said first member (1) is transmitted by said second member (2) at least partially in the form of a vibratory force.
摘要翻译：本发明涉及一种钻孔罐。已知的钻孔罐效率有限。根据本发明，钻孔罐具有用于接收机械冲击的构件（1）和用于响应于所述冲击传递力的第二构件（2），所述第二构件（2）可相对于所述第一构件（ 1）在平行于钻孔方向的纵向方向上在钻孔的使用中，在延伸位置和收缩位置之间使用通道装置（3），用于容纳在所述第一和第二构件（12）之间延伸的电粘性流体和 /或当所述构件朝向所述收缩位置移动时容量减小的释放室（5），邻近所述通道装置设置的电场产生装置（12），用于在所述通道装置中产生电粘性流体中的交流电场（3）使用钻孔器; 感测装置，其布置成直接或间接地感测到所述第一构件（1）上的冲击和所述构件（12）中的至少一个从所述延伸位置朝向所述收缩位置的相对运动; 以及控制装置，其被布置成响应于所述感测装置的所述感测而激活所述电场产生装置（12,13），使得在收缩期间电粘性流体通过通道装置（3）被周期性地抑制，从而对所述电场产生装置第一构件（1）由所述第二构件（2）至少部分地以振动力的形式传递。

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