دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

a pump located along the length of a pipeline to raise the pressure and overcome friction or elevation losses.

The pressure at the bottom of the well. In a producing well the BHP may be the bottom hole flowing pressure or the bottom hole shut-in pressure. In a drilling or workover environment, the BHP is exerted by the column of fluid in the hole.

n: The ratio between the sum of the teeth width of cone bit and the length of contact busbar wire in the downhole.

n: a pressure-sensing element consisting of a twisted or curved tube of noncircular cross section, which tends to straighten when pressure is applied internally. By the movements of an indicator over a circular scale, a Bourdon tube indicates the pressure applied.

n: a condition in which the weight on a bit tooth has been so great that the tooth has dulled until its softer inner portion caves over the harder case area.

n: The tipping becomes blunt due to the teeth of cone bit suffers oversized load.

n: the greatest overall dimension measured perpendicular to the longitudinal centreline of the hull of a mobile offshore drilling rig. Also called the beam.

n: the change in the chemistry of a mud from one type to another. Also called conversion.

n: a phenomenon that sometimes occurs when a well blows out. Rocks, sand, clay, and other debris clog the hole and stop the blowout.

n: The wellbore blinding due to borehole wall sloughing.

n: The effect of solids forming an obstruction or bridge in the fluid passages. Bridging in reservoir pores may take place with solids over about a third of pore size. Bridging may be deliberate (additives in fluids to reduce fluid loss) or a problem (rese

collection of materials, usually from the formation that interlocks at some point in the well, often in the annulus and may stop flow or stick the pipe in place.