Page 312 - Shale Shakers Drilling Fluid Systems
P. 312
294 SHALE SHAKERS AND DRILLING FLUID SYSTEMS
Distillation Process of first vaporizing a liquid and then condensing the vapor into a
liquid (the distillate), leaving behind nonvolatile solid substances of a
drilling fluid. The distillate is the water and/or oil content of a fluid.
Divided Deck A deck having a screening surface longitudinally divided by partition (s).
Dog Leg The "elbow" caused by a sharp change in drilling direction in the wellbore.
Double Flute The flutes or leads advancing simultaneously at the same angle and 180°
apart. See: Flute, Flight, Blade.
Drill Stem Test (DST) A post-drilling and pre-production test, which allows formation fluids to
flow into the drill pipe under controlled conditions, to determine whether
oil and/or gas in commercial quantities have been encountered in the
penetrated formations.
Drilled Solids Formation solids that enter the drilling fluid system, whether produced by a
bit or from the side of the borehole. See: Low-Gravity Solids, Cuttings.
Drilled Solids Fraction The average volume fraction of drilled solids maintained in the drilling
fluid over a specified interval of footage.
Drilled Solids Removal All equipment and processes used while drilling a well that remove the
System solids generated from the hole and carried by the drilling fluid (i.e., set-
tling, screening, desanding, desilting, centrifuging, and dumping).
Drilled Solids Removal A measure of the performance of a system to remove drilled solids from
System Performance the drilling fluid.
Drilling Fluid The term applied to any liquid or slurry pumped down the drill string and
up the annulus of a hole to facilitate drilling. See.- Drilling Mud, Mud.
Drilling Fluid Additive Any material added to a drilling fluid to achieve a particular effect.
Drilling Fluid Analysis Examination and testing of the drilling fluid to determine its physical and
chemical properties and functional ability. See.- API Bulletin RP 13B.
Drilling Fluid Cycle Time The time necessary to move a fluid from the kelly bushing to the flow
line in a borehole. The cycle in minutes equals the barrels of drilling fluid
in the hole, minus pipe displacement, divided by barrels per minute of
circulation rate: (Hole bbl - Pipe Volume bbl)/Circulation Rate bbl/min.
Drilling Fluid Engineer One versed in drilling fluids, rig operations and solids and waste man-
agement whose duties are to manage and maintain the drilling fluid pro-
gram at the well site. Also called a mud engineer.
Drilling Fluid Program A proposed plan or procedure for application procedure and properties
of drilling fluid(s) used in drilling a well with respect to depth. Some
factors that influence the drilling fluid program are the casing program
and formation characteristics such as type, competence, solubility, tem-
perature, pressure, and so forth.
Drilling In The drilling operation starting at the point of drilling into the producing
formation.
Drilling Mud Drilling Fluid is the preferred term. See: Drilling Fluid.
