Pump down wipe plug and cementingdrilling process

专利名称：Pump down wipe plug and

cementing/drilling process

发明人：Carl A. Davis申请号：US05/941162申请日：19780911公开号：US04190112A公开日：19800226

摘要：An improved pump down wipe plug has at least one tooth protruding from itsbottom surface capable of engaging, denting and penetrating the surface on which theplug comes in contact within the well. An improved process of cementing and drillingthrough a plug comprises inserting a pump down wipe plug having at least one toothprotruding from its bottom surface at the interface of wet cement and another fluidwithin the well, pumping the wet cement and the plug into position so that the toothengages, dents and penetrates the surface below it, then when the cement has set,lowering a drill bit onto the plug and drilling the plug, the tooth or teeth retarding thetendency of the plug to rotate over the surface with which it is in contact therebyenhancing the drilling action of the drilling bit.

申请人：DAVIS, CARL A

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