دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: see rotary locking device. locking mandrels n pi: slickline tools with slips and rubber cups to contain pressure and pack-off tubing in wells not equipped with landing nipples.

n: a device with an elastomer packing element that depends on pressure below the packing to effect a seal in the annulus. Used primarily to run or pull pipe under low or mederate pressures, this device is not dependable for high differential pressures. Also called a stripper.

a seal between or around equipment to isolate pressure or areas within the well. .

n: a preventer having a unit of packing material whose closure depends on well pressure coming from below. It is used primarily to strip pipe through the hole or allow pipe to be moved with pressure on the annulus.

a polished nipple is run below blast joints to allow a pack-off set point when by-passing a damaged joint.

positive pressure pack-off test – tubing.