دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: a rotary tool that is hung from the hook and the traveling block to suspend and permit free rotation of the drill stem. It also provides a connection for the rotary hose and a passage- way for the flow of drilling fluid into the drill stem.

n: A mechanical device that must simultaneously suspend the weight of the drillstring, provide for rotation of the drillstring beneath it while keeping the upper portion stationary, and permit high-volume flow of high-pressure drilling mud from the fixed por

n: an AC motor designed to keep time" with the AC power supply;it rotates at the same speed as the alternator that supplies the current or at a fixed multiple of that speed.

n: a trough-shaped configuration of folded rock layers. Compare anticline.

a down-fold in the rock where the sides tilt upwards. Opposite of a trap.

n: a chart comprising oceanic wave data collected simultaneously from vessels and computed wave heights for areas lacking reports.

n: A kind of oil soluble substance,which usually used as filtrate reducer of completion fluid and workover fluid.

n: connection for transforming three-phase power using two transformers;a variation of the open-delta connection.

thermal alteration index;an estimate of how maturation has altered the source rock in the creation of hydrocarbons.

n: a contract clause that guarantees payment to a seller for gas, even though the particular gas volume is not taken during a specified time period. Some contracts stipulate a time period for the buyer to take later delivery without penalty.

n: under ESA, killing, capturing, hunting, harassing, or modifying or destroying the habitat so that breeding, feeding, or sheltering of a species is significantly impaired. Consequently, clearing an area that is the actual or potential habitat of an endangered or threatened species could constitute a violation of the act.