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井下脉冲技术同震击器相比具有极大的优越性。它不需要高强度地打捞管柱,而且发生中心管从封隔器中脱开和打捞管柱与封隔器粘住退不开的现象同用震击器打捞相比也少得多。脉冲波与超额负荷是相互独立的,所以对水平井或大位移井来说脉冲打捞技术非常理想。该技术的另一个优点是打捞管柱不需要像震击器那样做大量的上下往复运动。从井内起出打捞管柱时,封隔器悬挂在类似于套管接箍一样的限制环内,不会掉到井内。井下脉冲工具靠泵入的流体来工作,它可以在任何时候通过启动循环系统来激发脉冲波,不需要向下活动打捞管柱。同常规震击器打捞方式相比,脉冲打捞技术作业效果非常明显,经济效益十分显著。
Downhole pulse technology has great superiority compared with jars. It does not require high-strength fishing string, and the occurrence of central tube detachment from the packer and salvage string and packer sticky not open the phenomenon with the use of jars salvage compared to much less. Pulse and overburden are independent of each other, so pulse salvage technology is ideal for horizontal wells or extended-reach wells. Another advantage of this technique is that the tubing string does not require a lot of up and down reciprocation like a jar. When retrieving the string from the well, the packer is suspended in a restraining ring similar to a sleeve coupling and does not fall into the well. Downhole pulse tools work on pumped fluid, which can at any time activate the circulatory system to excite pulsating waves without the need to salvage the pipe string down. Compared with the conventional fishing way, the effect of the pulse salvage technology is very obvious, and the economic benefit is very significant.