دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

Det Norske Veritas: a classification and qualification setting business.

n: the shrinking of the solid volume of rock as limestone turns to dolomite, i.e., the conversion of limestone to dolomite rock by replacement of a portion of the calcium carbonate with magnesium carbonate.

n: (slang) a person who prospects for oil, especially by using seismology. Also called doodlebugger. v: (slang) to explore for oil, especially by using seismic techniques in which explosive charges are detonated in shot holes to create shock waves (name taken from the resemblance of these explosions to the puffs of loose dirt thrown up by the doodlebug, or ant lion, when digging its funnel-shaped hole).

seismograph.

n: a lubricant for the threads of oilfield tubular goods. v: to apply thread lubricant.

n: A generic term applied to all types of thread lubricants. For casing, tubing and line pipe use lubricants specified in API Bulletin 5A. For tool joints and drill collars less than 7 inches OD, use a thread lubricant containing not less than 40-60% by weig

pipe thread dope used to lubricate and seal the threaded connection.

n: a annex with two inverted valves and connected with the bottom of the tail pipe

two successive plugs, each capable of holding maximum pressure, with a vent between them capable of bleeding off all pressure between the plugs. Also – a valve with two seating surfaces which, in the closed position, blocks flow from both valve ends when

n: cutting elements whose cutting pedion is biconical,set in the bit to drill the hard formation and very hard formation

n: a device containing an angle indicator, a timing element, and a replaceable chart that is used to measure the direction and the degree of deviation as a hole is being drilled. The timing element goes off when the tool has come to rest just above the drill bit and descends on the sharply pointed angle indicator, which then punches a hole in the chart. The chart rotates 180., and a second hole is punched to verify a correct reading of the resting angle of the tool.

n: a kind of mechanical inclinometer