دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

v: the procedure whereby one threaded piece (such as a pipe) is unscrewed from another.

v: To disconnect a string of pipe by unscrewing one threaded piece from another.

unscrewing a tool or equipment. In pipe recovery, back-off of a joint precedes recovery of the upper section in a well. Common in plug and abandonment or sidetrack operations.

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: To unscrew one threaded piece (as a section of pipe) from another

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: any wrench used to hold a pipe or a blot to prevent its turning while another length of pipe or a nut is being screwed into or out of it.

n: 1. a member of a cable-tool drilling crew who repairs bits. 2. a machine used to repair, sharpen, and gauge bits.

n: the threaded portion of the top of the bit that is screwed into the drill collar. Also called the pin.

n: a training procedure to determine that rig crews are familiar with correct operating practices to be followed in the use of blowout prevention equipment.

n: an electric heater screwed onto lengths of tubing and lowered into the well. It raises the bottomhole temperature of the well to prevent solidification of paraffin in subsurface equipment.