دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: This kind of nozzle has a up opening from the body of bit.

a semipermeable membrane that will allow water to pass but not salt. Salt water is pressured into the face of the membrane, the water passes through but the salt cannot pass. The filter has be be backwashed regularly to remove the accumulated salt. The pr

v: to displace the wellbore fluid back to the surface;to displace tubing volume back to the pit.

removing gravel or cement by shifting the packer or opening the sleeve and circulating out of a well by reverse circulating.

n: A kind of phenomenon when building the pressure of bit is serious,which can make the drill pipe reverse.

n: A kind of well control ways, which blowing out the overflow from the inner of drill pipe through pressed in drilling fluid from the annular space.

n: a device that increases an engines speed by decreasing the positive voltage going to the electric actuator and governor. As the engine needs more fuel to go faster, the reverse-acting actuator decreases the positive voltage to make the governor increase the fuel. Compare direct-acting electric actuator. See governor.

n: in reference to tubing under the effects of temperature changes, sucker rod pumping, or high external pressure, to decrease in diameter while increasing in length. Compare balloon.

n: a fishing tool that is lowered into the hole during nonnal circulation and then produces reverse circulation to create a vacuum so that junk is sucked inside the tool. Also called a jet-powered junk basket.

n: see anticirculating fishing basket.

n: see perforate underbalanced.

n: see perforating with negative pressure.