Method and apparatus to remove composite frac plugs from...

Details Method and apparatus to remove composite frac plugs from... Method and apparatus to remove composite frac plugs from...

2011-06-14

2011-06-14

Bagnell, David J (Department: 3676)

Wells

Processes

Destroying or dissolving well part

C166S055600, C175S398000, C175S428000

Reexamination Certificate

active

07958940

ABSTRACT:
A process is provided to drill through a composite frac plug. The plug is in an oil well. The process utilizes an improved mill. The process also rotates drill pipe at one hundred to five hundred rpm and circulates drilling fluid such that the velocity of the fluid upwardly over the exterior of the drill pipe is in the range of three hundred to four hundred and seventy-five feet per minute. One thousand to three thousand pounds of slack off weight is applied during the process.

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patent: 2008/0173453 (2008-07-01), Misselbrook

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