دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The gas-holder tank connected with discharge line of reciprocal pump. It is a air cushion aerated by compressive air, used to absorb or decrease fluctuation of pressure and delivery capacity disproportion when reciprocal pump works.

n: Used compressive air which replaces flushing fluid as circulation media to cool the bit and carry over cuttings.

n: A rig whose every clutch and drawworks brakestaff are controled by compressive air. Usually assisted with hydraulic brake and dynamic brake.

polarization to a higher oxidizing potential to achieve a reduced corrosion rate (promotes passivity).

n pi: balls made of nylon, hard rubber, or both and used to shut off perforations through which excessive fluid is being lost.

n: Made by nylon or ebonite. Used to block off the opening in the capital string and prevent fluid lossing when fracturing.

small, rubber-covered, hard centered balls that can seal individual perforations during a chemical treatment.

n: the surface that separates each successive layer of a stratified rock from the preceding layer. It is here that minor changes in sediments or depositional conditions can be observed.

surface separating layers in a sandstone. Usually bedding planes mark the transition of the particle transport event. An accumulation of minerals or other materials laid down at the time of rock deposition or generated by reworking, that may create signif

n: an area of reduced diameter in pipe caused by excessive longitudinal strain or by a combination of longitudinal strain and the swaging action of a body. A bottleneck may result if the downward motion of the drill pipe is stopped with the slips instead of the brake.

n: the active ingredient of slaked (hydrated) lime, and the main constituent in cement (when wet). Referred to as lime" in field terminology. Its symbol is Ca(OH)2

n: Ca(OH)2, white powder. The pH value of its saturated solution is 12.4. Usually used for depressant of inorganic salt, calcium mud and clearing excessive carbanion in drill fluid.

Ca(OH)2, slaked lime.

n: Used for clearing excessive calcium ion in drill fluid to prevent or overcome the additive producing defective effect to drill fluid.

n: liquid chemical compounds that are injected into lines carrying fluids that contain H2S, Most of these inhibitors are designed to coat equipment surfaces to physically isolate them from compressive substances. Others react with sulfur compounds to form less-destructive compounds.