دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n: The powder manufactured by bucking cretaceous lump. Usually used for heavy weight additive of drill fluid.

a kick control method that circulates the well immediately and mud weight is brought up gradually. (Concurrent method).

n: see concurrent method.

n: A kind of well killing method of handling blowout. Increasing the weight of drill fluid and pumping it into the wellbore at the same time after well shuting in and requesting casing pressure. Completing well killing in a loop cycle.

n: any of several substances - usually organic compounds of high molecular weight-that, when added in low concentrations to a bentonite or to certain other clay slurries, will increase the viscosity of the system. See low-solids mud.

n: The material increasing viscosity by adding into the clay slurry.

a drilling additive to increase the viscosity of water based muds gelled with bentonite.

n pi: special segmented weights attached to the guy wires of a guyed compliant platform that keep the guy wires taut as the platform jacket moves with the waves and current of the water. As tension on a guy wire is lessened, one or more segments of the weight drop to the seafloor and re-establish tension on the wire. As tension increases on a guy wire, the tension pulls one or more segments off the seafloor so that the wire is not over stressed.

n: a casing string with joints of various collapse resistance, internal yield strength, and tensile strength, designed for various depths in a specific well to best withstand the conditions of that well. In deep wens, high tensile strength is required in the top casing joints to carry the load, whereas high collapse resistance and internal yield strength are needed in the bottom joints. In the middle of the casing, average quality is usually sufficient. The most suitable combination of types and weights of pipe helps to ensure efficient production at a minimum cost.

n: A casing string made up of various different grades or weights of casing (sometimes referred to as a tapered string).

n: see equivalent weight.

n: a packer that is locked in its set position by tubing weight set down on it.

a retrievable packer where the slips are set and the seal energized by setting tubing string weight down on the packer. Releases by picking up the string. Useful where annular pressure could unseat a tension-set packer.

n: a rigid offshore drilling platform built of steelreinforced concrete and used to drill development wens. The platform is floated to the drilling site in a vertical position. At the site, one or more tall caissons that serve as the foundation of the platform are flooded so that the platform comes to rest on bottom. Because of the enormous weight of the platform, the force of gravity alone keeps it in place. See platform rig.