Pump down wipe plug and cementing/drilling process

Details Pump down wipe plug and cementing/drilling process Pump down wipe plug and cementing/drilling process

1978-09-11

1980-02-26

Leppink, James A.

Wells

Processes

Cementing, plugging or consolidating

166153, 166193, 175 57, E21B 3316

Patent

active

041901126

ABSTRACT:
An improved pump down wipe plug has at least one tooth protruding from its bottom surface capable of engaging, denting and penetrating the surface on which the plug comes in contact within the well. An improved process of cementing and drilling through a plug comprises inserting a pump down wipe plug having at least one tooth protruding from its bottom surface at the interface of wet cement and another fluid within the well, pumping the wet cement and the plug into position so that the tooth engages, 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 the tendency of the plug to rotate over the surface with which it is in contact thereby enhancing the drilling action of the drilling bit.

REFERENCES:
patent: 2075882 (1937-04-01), Brantly
patent: 2165433 (1939-07-01), Wickersham
patent: 2854079 (1958-09-01), Schnitter
patent: 2893493 (1959-07-01), Copas
patent: 3035639 (1962-05-01), Brown et al.
patent: 3552492 (1971-01-01), Mullins

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