heavy weight drill pipe

Product Description

Heavy weight drill pipes are manufactured from AISI ***5H modified drill collar material according to SPI SPEC7, heavy weight drill pipe was developed to provide a gradual transition from the heavy weight drill collars to the relatively light weight drill pipe. This intermediate weight pipe has a wall thickness of approximately. and it helps prevent stress concentration at the top of the drill collars It also reduces torque and differential pressure sticking. It is intended primarily for directional drilling. 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 id appropriate for some straight hole application.