دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see breakout cathead, cathead. makeup cathead.

n: The general form of address of mechanized cathead. Used for winding wire line automatically and draw the tongs to make up and breakout.

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

n: A kind of explosive package used for breakouting pack of dynamic. It is sent by cable to first thread above the sticking point. Pull the drill stem and rotate left the

n: The wrench used to seizure another pipe or screw when make up and breakout.

n pl: the tongs latched on the drill pipe joint hanging in the totary by the slips, used to keep the pipe from turning as the makeup or breakout tongs (the lead tongs) apply torque to make up or break out the tightened tool joint connection. Compare lead tongs.

n: A tong suspended in the derrick, normally on the drillers right, used to hold box end of the tool joint while the pin end is loosened and unscrewed. Also called a make-up tong, as it is moved to pin end to tighten the joint to the recommended torque after

n: See emulsion.

an enlargement of the borehole.

n: a heavy plate that fits in the rotary table and holds the drill bit while it is being unscrewed from the drill collar. See bit breaker.

n: See bit breaker.

n: a device attached to the catshaft of the drawworks that is used as a power source for unscrewing drill pipe;usually located opposite the drillers side of the drawworks. See cathead.

n: The self-releasing cathead installed in the cat shaft of drawworks.

n pi: tongs that are used to start unscrewing one section of pipe from another section, especially drill pipe coming out of the hole. Compare makeup tongs. See also tongs.

n: See tong.