دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a clause in an oil and gas lease that includes the lease lands that may be owned by the lessor and inadvertently omitted from the legal description. These are usually oddly-shaped bits owned by the lessor and adjoining the described tract. Also called coverall clause.

n: the procedure by which a new joint of pipe is added to the drill string. The new joint is already placed in the mousehole before the connection is made. The kelly is broken out from the top of the string and swung over to the mousehole where it is made up

n: a fishing tool used to recover a parted string of sucker rods from a well.

n: the semisolid, gel-like masses of water-in-oil emulsions that form from heavier crude oils after a spill. Sometimes called chocolate mousse." The masses may contain up to 80% water and are more viscous than the component oil. Mousse weathers slowly, with the oil retaining its initial toxicity, and may become tar balls that float at or near the sea surface and strand on beaches. The transport of mousse and tar balls can increase the area and duration over which a spill is felt.

n: the liquid circulated through the wellbore during rotary drilling and workover operations. In addition to its function of bringing cuttings to the surface, drilling moo cools and lubricates the bit and the drill stem, protects against blowouts by holding back subsurface pressures, and deposits a mud cake on the wall of the borehole to prevent loss of fluids to the formation. Although it originally was a suspension of earth solids (especially clays) in water, the mud used in modem drilling operations is a more complex, three-phase mixture of liquids, reactive solids, and inert solids. The liquid phase may be fresh water, diesel oil, or crude oil and may contain one or more conditioners. See drilling fluid.

n: common term for drilling fluid.

drilling mud. Usually a slurry of weighting and fluid-loss control solids in a liquid.

n: a continuous examination of the drilling fluid circulating in the wellbore for the purpose of discovering evidence of oil or gas regardless of the quantities entrained in the fluid. When this service is utilised, a portable mud logging laboratory is set up at the well. Also called mud logging.

n: the procedure that processes the mud and recovers the performance when the mud is polluted.

n: wholly investigation of exponents that all used mud in location.

n: affected by the outer influenceduring the drilling, the mud characteristic deteriorate. Then adjust by chemical agent, recovery the original performance. The process of above called mud chemical treatment.

n: the process of pumping mud downward to the bit and back up to the surface in a drilling or workover operation. See normal circulation, reverse circulation. mud cleaner n: a cone-shaped device, a hydro-cyclone, designed to remove very fine solid particles from the drilling mud.

n: the procedure that pump the mud through the bit and then reture to the ground when drilling or workover.