دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a flow control valve that provides some control when running or pulling a string.

n: The included angle between the table of PDC and the line paralleling bit axis.

sudden backflow of a well, usually to clean the perforations.

v: to hold one section of an object such as pipe while another section is being screwed into or out of it.

v: To hold one section of pipe while another is being screwed into or out of it (as in back up tongs).

n: The chain tongs that seizure the strings when make up and breakout.

n: The small sized handcart used to transport devices and pipes.