drill pipe 200ft per day, page-3

Why do you say six foot per day.

Baker oil tools supplies to the Rocky Mountain area - here is their range of milling tools - rates they quota are much higher than six foot per day (more like over sixty foot per day!)

http://www.bakerhughes.com/Bot/Thru_Tubing/pdf/fs_pg31_34.pdf

See the "metal muncher" on page 32

METAL MUNCHER
JUNK MILL
Product Family No. H15102
DESCRIPTION/APPLICATION
The METAL MUNCHER Junk Mill is
designed for milling stationary obstructions.
The junk mill utilizes the
patented METAL MUNCHER technology
as the lead cutting structure
while being backed up by SUPERLOY
tungsten carbide. With the SUPERLOY
backing, if the METAL
MUNCHER inserts become damaged
the mill will perform like a standard
junk mill until a new row of inserts are
exposed.
The mills have been used to mill cemented
tubing, in some cases, at rates exceeding
30 ft per hour. Cemented drill collars and
drillpipes have in many cases been milled
faster than they could be washed over and
recovered.
FEATURES/BENEFITS
• Increased penetration rates
• Increased mill life
• Smaller, more uniform cuttings
• SUPERLOY backing