دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a part of turbine. That is lower part clamping joint, at the same time it is also a seal device of main bearings lower ,main bearing and covering.

n: low-temperature separator. A mechanical separator that uses refrigeration obtained by expansion of gas from high pressure to low pressure to increase recovery of gas-entrained liquids.

lower workover riser package.

n: a workover rig. usually lightweight, that is specially built to run a string of 3/4-inch or 1-inch (1.9- or 2.54- centimetre) tubing. See macaroni string.

n: a special light weight type workover rig.

n: an exploration method in which an instrument that measures the intensity of the natural magnetic forces existing in the earths subsurface is passed over the surface or through the water. The instrumentation detects deviations in magnetic forces, and such deviations may indicate the existence of underground formations that favour the entrapment of hydrocarbons.

n: two bands fined with brake pads;the bands fit over the two rims of the drawworks drum. When the driller engages this brake, the pads press down on the rims to stop the drum from hoisting or from letting out drilling line. The main brake also keeps the drum from rotating (and therefore holds the drill stem stationary) when making up or breaking out drill pipe.

n: the brake that resorts the friction of brake block and brake drum. Mainly formed by lever, brake staple, brack block and balance beam.

n: the hot, plastic part of the earth that lies between the core and the crust. It begins 5 to 30 miles (10 to 50 kilometres) beneath the surface and extends to 1,800 miles (2,900 kilometres).

n: The intermediate layer of the Earth beneath the crust that is about 2900 km thick [1820 miles] and overlies the core of the Earth. The mantle consists of dense igneous rocks like pyroxenite and dunite, composed of the minerals pyroxene and olivine. The cr

the middle layer of the earth, laying just below the crust and composed of relatively high density rock.

n: 1. Under TSCA, anyone who manufactures or imports for commercial purposes over 10,000 pounds per year of a substance listed on the TSCA inventory. 2.under HAZCOM, production and drilling companies are considered manufacturers of crude oil, natural gas, and other products and must maintain an MSDS for these products.

n: a federal agency that stipulates construction and equipment requirements for vessels built under federal government subsidies. Address: 400 7th Street SW;Washington, DC 20590;(202) 366-5823.

n: a distinctive, easily identified rock stratum, especially one used as a guide for drilling or correlation of logs.

n: A widespread distinctive rock unit that can be correlated readily over a large area. The most useful marker beds tend to form rapidly, such as during volcanic or geologically instantaneous depositional events, and have unusual seismic, magnetic, electrica