دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: on a drilling rigs hook, a device inside the hook that is filled with hydraulic fluid. It dampens the tendency of the hook to bounce (move rapidly up and down) when crew members break out a joint of drill pipe. As the last engaged threads of the tool joint pin clears the box threads, the release may be sudden and, if not dampened, the pin could easily strike the box and damage the threads on both.

n: using the drilling rising system and a term of tool , the equipment that obligeds the drilling rig to lower the holebore under the condition of shut in.

n: see pulsation dampener.

n: 1. a device that mechanically or hydraulically forces pipe or tools into the well against pressure. 2. a device within some hooks that acts as a shock absorber in eliminating the bouncing action of pipe as it is picked up.

n: A suit of equipment be controled by hydraulic pressure,which can tripping in at definite pressure.

Snubbing usually requires an array of wireline blocks and wire rope that forces the pipe or tools into the well through a stripper head or blowout preventer until the weight of the string is sufficient to overcome the lifting effect of the well pressure on the pipe in the preventer. In workover opera- tions, snubbing is usually accomplished by using hydraulic power to force the pipe through the stripping head or blowout preventer. 2. to tie up short with a line.

n pi: see snubber defn. 1.