Related Oil & Gas Terms

• Filter cake

  1. compacted solid or semisolid material remaining on a filter after pressure filtration of mud with a standard filter press. thickness of the cake is reported in thirty-seconds of an inch or in millimeters. 2. the layer of concentrated solids from the drilling mud or cement slurry that forms on the walls of the borehole...

• Differential sticking

  A condition in which the drill stem becomes stuck against the wall of the wellbore because part of the drill stem (usually the drill collars) has become embedded in the filter cake. necessary conditions for differential-pressure sticking, or wall sticking, are a permeable formation and a pressure differential across a nearly impermeable filter cake and...

• Filter cake thickness

  A measurement of the solids deposited on filter paper in thirty-seconds of an inch during standard 30-min api filter test. see cake thickness. in certain areas the filter cake thickness is a measurement of the solids deposited on filter paper for 7-1/2-min....

• Cake consistency

  The character or state of the drilling mud filter cake. from api rp 13b: notations such as “hard,” “soft,” “tough,” rubbery,” and “firm” may be used to convey some idea of cake consistency....

• Surge loss

  The flux of fluids and solids that occurs in the initial stages of any filtration before pore openings are bridged and a filter cake is formed. also called spurt loss....