دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: 1. in directional drilling, the direction of the wellbore or of the face of a deflection tool in degrees (0-359") clockwise from true north. 2. an arc of the horizon measured between a fixed point (such as true north) and the vertical circle passing through the centre of an object.

n: Reflecting the direction of wellbore deflection.

in a horizontal plane, it is the angle (measured clockwise) of well path departure usually from true or magnetic north. It may also be expressed as the compass direction of the path of the well bore as measured by a borehole survey. (Note: check the speci

v: to reverse the flow of fluid from a water injection well to get rid of sediment that has clogged the wellbore.

v: The verb form of backwashing.

n: The process that drilling fluid is pumped from annular and reverses out from drill pipe. This method is fast than direct flushing.

n: I. the ramp at the side of the drilling rig where pipe is laid to be lifted to the derrick floor by the catline or by an air hoist. See carline. 2. any elevated walkway.

n: a nonprofit organisation sup- ported jointly by the American Petroleum Institute and the Society of Automotive Engineers, Inc. It administers work of the CFR and other committees that correlate test work and other studies on fuels, lubricants, engines, and engine equipment. Address: 219 Perimeter Centre Parkway, Suite 400;Atlanta, GA 30346;(770) 396-3400.

n: an apparent force caused by the rotation of the earth about a vertical axis. This force causes wind or water to move clockwise in the Northern Hemi- sphere and counter clockwise in the South- em Hemisphere.

n: 1. a low-pressure area, around which wind flow is counter-clockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere. The term is sometimes used to describe storms occurring in the atmosphere;in the Indian Ocean it is used to designate a tropical cyclone. 2. a device for the separation of various particles from a drilling fluid, most commonly used as a desander. The fluid is pumped tangentially into a cone, and the fluid rotation provides enough centrifugal force to separate particles by mass weight.

n: A device for the separation of solid particles from a drilling fluid. The most common cyclones used for solids separation are a desander or desilter. In a cyclone, fluid is pumped tangentially into a cone, and the fluid rotation provides enough centrifuga

a device that separates cuttings by centrifugal motion of the fluids.

adj: in reference to a mud pump, the action of the piston moving mud through the cylinder on both its forward and backward stroke. Compare single-acting.