دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: in pipeline construction, the person with responsibility for running the spread. The spread superintendent represents the contractors interests in the field.

n: see spreader bar.

n: a rod positioned between two lifting lines so that the weight of a joint being lifted off the trailer is evenly distributed and the pipe does not buckle in the center.

n: a spring-actuated metal band or ring (ferrule) used to expand a liner patch when making casing repairs. See liner patch.

n: A kind of metal liner actuated by spring .

n: a tide that has the highest range at a given location. This type of tide occurs when the sun and the moon are aligned (during new and full moons).

n: 1. a wheel with projections on the periphery to engage with the links of a chain. 2. a projection on the periphery of a wheel that engages the links of a chain.

n: in a chain-and-sprocket drive, the amount of difference in size between the two sprockets.

v: 1. to move the drill stem up and down in the hole over a short distance without rotation. Careless execution of this operation creates pressure surges that can cause a formation to break down, resulting in lost circulation. 2. to force a wireline tool or tubing down the hole by using a reciprocating motion. 3. to begin drilling a well;i.e., to spud in.

n: To start the well drilling process by removing rock ,dirt and other sedimentary material with the drill bit.

to begin drilling.