دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

opening or closing a sliding sleeve.

n: a thin, often tapered piece of material used to fill in space between things (such as for support, leveling, or adjustment of fit). ship drift n: a method that uses a ship itself as an instrument to measure cruuents. Navigation equipment on board measures the currents effect on the vessel.

n: A layer material be used as spacer or for protection.

n: a floating offshore drilling structure that is towed to and from the drilling site. The unit has a streamlined bow and squared-off stern, a drilling derrick usually located near the middle of the barge, and a moon pool below the derrick through which drilling tools pass to the seafloor. It is identical in appearance to a drill ship, but is not self-propelled. It must therefore be towed to the drill site. Shipshaped barges are most often used for drilling wells in deep, remote waters. See floating offshore drilling rig.

n: drill ship.

n: the part of a drilling bit on which the cone is anchored. Shirt-tails extend below the threaded pin of the bit and are usually rounded on bottom, thus acquiring the name.

n: A kind of safety relief expansion joint ,which be used to decrease the vibration.



a mechanical dampener above a perforating gun that attenuates some of the acceleration force created by firing the gun.

n: The internal-aerating sealing container at the exit of the pump,which can decrease the unequal of delivery capacity and fluctuation of pressure.

n: The internal-aerating sealing container at the import of the suction valve,which can make the velocity of fluid stability.

n: the sudden application of force by a moving body on a resisting body so that a great deal of stress is produced in the resisting body.

n: a vibration dampener.