Integral heavy weight drill pipe is manufactured from AISI 4145H
modified material according to API 7-1,thick-walled pipe called
integral heavy weight drill pipe was developed to provided a
gradual transition from the heavy drill collars to the relatively
light weight drill pipe. This intermediate weight pipe has a wall
thickness of approximately, and helps prevent stress concentration
at the top of the drill collars. It also allows you to drill at
higher rpms, reducing torque and differential pressure sticking. It
is intended primarily for directional drilling. Because it bends
easily, it simplifies directional control and minimizes connection
fatigue problems common to high angle or horizontal drilling. The
reduced number of pipe failures and increased drill stem service
also make it appropriate for some straight-hole applications.
