- 産業: Oil & gas
- Number of terms: 8814
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The volume percent of oil in a mud. The term should not be used to refer to the amount of synthetic fluid.
Industry:Oil & gas
The volume of slurry obtained when one sack of cement is mixed with the desired amount of water and other additives, usually given in units of m<sup>3</sup>/kg or ft<sup>3</sup>/sk (sack).
Industry:Oil & gas
The volume per unit mass of a dry material plus the volume of the air between its particles.
Industry:Oil & gas
The volume a solid occupies or displaces when added to water divided by its weight, or the volume per unit mass. In the oil field, absolute volume is typically given in units of gallons per pound (gal/lbm) or cubic meters per kilogram (m<sup>3</sup>/kg).
Industry:Oil & gas
The volume occupied by one sack of dry cement after mixing with water and additives to form a slurry of a desired density. Yield is commonly expressed in US units as cubic feet per sack (cu. Ft. /sk).
Industry:Oil & gas
The volume of mud filtrate measured after 30 minutes in API static filtration tests. The volume and cake thickness are the two data points in the test.
Industry:Oil & gas
The viscosity of a fluid measured at a given shear rate at a fixed temperature. In order for a viscosity measurement to be meaningful, the shear rate must be stated or defined.
Industry:Oil & gas
The vertical distance from a point in the well (usually the current or final depth) to a point at the surface, usually the elevation of the rotary kelly bushing (RKB). This is one of two primary depth measurements used by the drillers, the other being measured depth. TVD is important in determining bottomhole pressures, which are caused in part by the hydrostatic head of fluid in the wellbore. For this calculation, measured depth is irrelevant and TVD must be used. For most other operations, the driller is interested in the length of the hole or how much pipe will fit into the hole. For those measurements, measured depth, not TVD, is used. While the drilling crew should be careful to designate which measurement they are referring to, if no designation is used, they are usually referring to measured depth. Note that measured depth, due to intentional or unintentional curves in the wellbore, is always longer than true vertical depth.
Industry:Oil & gas
The velocity gradient measured across the diameter of a fluid-flow channel, be it a pipe, annulus or other shape. Shear rate is the rate of change of velocity at which one layer of fluid passes over an adjacent layer. As an example, consider that a fluid is placed between two parallel plates that are 1. 0 cm apart, the upper plate moving at a velocity of 1. 0 cm/sec and the lower plate fixed. The fluid layer at the lower plate is not moving and the layer nearest the top plate is moving at 1. 0 cm/sec. Halfway between the plate, a layer is moving at 0. 5 cm/sec. The velocity gradient is the rate of change of velocity with distance from the plates. This simple case shows the uniform velocity gradient with shear rate (v1 - v2)/h = shear rate = (cm/sec)/(cm/1) = 1/sec. Hence, shear rate units are reciprocal seconds.
Industry:Oil & gas
The use of coiled tubing with downhole mud motors to turn the bit to deepen a wellbore. Coiled tubing drilling operations proceed quickly compared to using a jointed pipe drilling rig because connection time is eliminated during tripping. Coiled tubing drilling is economical in several applications, such as drilling slimmer wells, areas where a small rig footprint is essential, reentering wells and drilling underbalanced.
Industry:Oil & gas
