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The Guide to Oilwell Fishing Operations, 2nd Edition by Joe P. DeGeare

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Chapter 17

Section Milling

Abstract

Section milling and pilot milling are similar in that both operations mill away large sections of casing or pipe, but they are not the same. Section milling creates an exit point in a string of casing that is equal to the bit size of the casing being milled. Pilot milling completely removes an entire casing string from the top to the point where milling stops. The resulting hole is larger than the outside diameter (OD) of the casing being milled.

Keywords

Cutting blades

Drill collars

Pilot milling

Section milling

Tungsten carbide buttons

Section milling and pilot milling (discussed in Chapter 12) are similar in that both operations mill away large sections of casing or pipe, but they are not the same. ...

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