دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

Static condition of the length of tubing in the well, where buoyed tube weight (well fluid sensitive) equals the well pressure acting against the cross-sectional area of the tube. The balance point does not include any frictional forces exerted by frictio

the hydraulic powered chain driven unit that snubs or strips coiled tubing into or out of a well.

n: a special blowout preventer used in snubbing.

an extension of a retrievable tool that is used to set and release the tool.

hydraulic workover, usually working under pressure. Some HWO units are set up with pipe handling capacity as are snubbing units.

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.

a snubbing job in which the well is workover without killing the well with fluid. Usually accomplished by multiple barriers that seal on the tubulars.

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.

a hydraulic workover/snubbing tubing running term – when the weight of the pipe is sufficient to pull the pipe into a well against the surface pressure.

hydraulic workover/snubbing tubing running term – when the weight of the pipe is not sufficient to pull the pipe into a well against the surface pressure and additional force (snubbing) is required.

n: see pulsation dampener.