دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: A old kind of method of cementing. Packing cement into the formation by closing the casing head and annular and appling pressure to borehole. This method does not need packer, but it cannt gurrantee that cement slurry can be packed into the bed of intere

n: in crane operations, a sling made from a braided wire rope.

a depositional environment with several channels that may or may not be connected.

n: a rope formed by plaiting (braiding) several strands of wire rope.

n: a device for arresting the motion of a mechanism, usually by means of friction. as in the drawworks brake. Compare electrodynamics brake. hydrodynamic brake.

n: The device operated by the driller to stop the motion of the draw-works.

the main device for stopping the travel of the drawworks of a rig when running or pulling a drill string.

n: a part of the brake mechanism consisting of a flexible steel band lined with a material that grips a drum when tightened. On a drilling rig, the brake band acts on the flanges of the drawworks drum to control the lowering of the travelling block and its load of drill pipe, casing, or tubing.

n: Bourdon plate whose inner surface is installed with several brake blocks at definite interval.

n: the surface on a winch, drum, or reel to which the brake is applied to control the movement of the unit by means of friction.

n: a section of the lining of a brake band shaped to conform to the curvature of the band and attached to it with countersunk screws. See brake band.

n: The heatproof, abrasion proof, and high friction coefficient blocklike component part. Made by material pressure stencil or plait pressure stenci. Fixed in the inner surface with head screw. The friction produced by contact of brake drum when working.

n: The maximal brake torque produced by brake gear when laying down safely.