- Industry: Oil & gas
- Number of terms: 8814
- Number of blossaries: 0
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The act of passing the mud around a piece of equipment, such as passing mud returns around the shale shaker screens or going around a hydrocyclone device. From a mud-engineering viewpoint, this can be a bad practice because it can allow drill solids to degrade and accumulate as fines to the degree that they might cause mud problems.
Industry:Oil & gas
The act of adding commercial materials to convert water or a water-clay slurry into a mud. Mudding up is usually done after drilling a well to a certain depth with relatively inexpensive spud mud or other native-clay mud, or with water or air. By delaying the use of drilling fluid, operators can save money in the initial stages of drilling a well.
Industry:Oil & gas
The ability of the slurry to be pumped. Pumpability is usually measured by the API thickening-time test.
Industry:Oil & gas
The ability of set cement to resist deterioration in the presence of sulfate ions.
Industry:Oil & gas
The ability of a circulating drilling fluid to transport rock fragments out of a wellbore. Carrying capacity is an essential function of a drilling fluid, synonymous with hole-cleaning capacity and cuttings lifting. Carrying capacity is determined principally by the annular velocity, hole angle and flow profile of the drilling fluid, but is also affected by mud weight, cuttings size and pipe position and movement.
Industry:Oil & gas
The ability of a cement slurry to maintain homogeneity. Two tests are used as a measure of slurry stability: the free-fluid test and the sedimentation test.
Industry:Oil & gas
The abbreviation for concentration in US oilfield units, pound per barrel. One lbm/bbl is the equivalent of one pound of additive in 42 US gallons of mud. The "m" is used to denote mass to avoid possible confusion with pounds force (denoted by "lbf"). Lbm/bbl is sometimes written as PPB, but must not be confused with parts per billion. In SI units, the conversion factor is one pound per barrel equals 2. 85 kilograms per cubic meter. For example, 10 lbm/bbl = 28. 5 kg/m<sup>3</sup>.
Industry:Oil & gas
Surface free energy that exists between a liquid and air. Surface tension can be observed as a curved meniscus in a small tube of the liquid. This energy barrier prevents a liquid (such as water) from spontaneously mixing with air to form a foam. To make a foam, as used for a drilling fluid, the liquid's surface tension must be lowered by adding a third component (a foamer) that accumulates at the interface. Foam preparation usually requires mechanical energy to break up the bulk liquid into thin films around each gas bubble.
Industry:Oil & gas
Some API procedures for drilling fluids are similar to ASTM procedures.
Industry:Oil & gas
