دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. a hand tool that is powered pneumatically. 2. a chamber filled with compressed air, often used offshore in seismic exploration. As the gun is trailed behind a boat, air is released, making a low frequency popping noise, which penetrates the subsurface rock layers and is reflected by the layers. Sensitive hydrophones receive the reflections and transmit them to recording equipment on the boat.

seismic source for ocean seismic work.

n: a hoist operated by compressed air;a pneumatic hoist. Air hoists are often mounted on the rig floor and are used to lift joints of pipe and other heavy objects.

n: an adjustable choke that is power-operated to control pressure of flow. See adjustable choke.

n: The adjustable choke controled by pneumatics or hydraulic pressure. Used for controlling the pressure and circulating rate.

n pi: a device, operated by air or hydraulic fluid, that fits into the opening in the rotary table when the drill stem must be suspended in the wellbore (as when a connection or trip is being made). Automatic slips, also called power slips, eliminate the need for roughnecks to set and take out slips manually. See slips.

n: A tool operated by pneumatics or hydraulic pressure.Used for chafing the drill stem when pipe connection or tripping.

n: The device that provides air for pneumatic system of drill fixture. Consisted by air compressor, processing unit of compressed air, gas receiver and controlling apparatus.

n: a device that is operated by a power source other than the fluid being sampled, for example, an electric or pneumatic motor.

n: a pneumatic or hydraulic device used to provide a constant tension on the wire ropes that run from the subsea guide base back to a floating drilling rig.

n: the relatively small pneumatically operated engine on an air hoist, or tugger.

n: 1. a rock drill that is pneumatically powered and usually held by the operator.2. an air hammer.

n: a pneumatically operated device mounted on top of the kelly that, when actuated, causes the kelly to turn or spin. It is useful when the kelly or a joint of pipe attached to it must be spun up, that is, rotated rapidly for being made up.

n: a pneumatically operated device mounted on the top of the kelly which,when actuated ,causesthe kelly to rotate.it may be used to make connections by spanning up the kelly.

a pneumatic device fitted to the top of the kelly that can spin the kelly.