2- RHEOLOGY

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((The laboratory measured mud parameters))

  a-Funnel Viscosity (vis)

  b-Plastic Viscosity (PV)

  c- Yield Point (YP)

  d- Gel strength 

  e- ph

  f- Filtration

  g- Alkalinity

  h- Chloride Content

  i– Calcium

  j- Retort


b-Plastic viscosity (Pv)

is that part of flow resistance in a mud caused primarily by the friction between the suspended particles and by the viscosity of the continuous liquid phase. i.e. it is a representation of the concentration, size and shape of the solid particles.

c-Yield point (Yp)

is a measurement under flowing conditions of the forces in the mud which cause gel structure to develop when the mud is at rest.


  • d-Gel strength (Gel)

is a measurement under static conditions of the forces in the mud which cause gel structure to develop when the mud is at rest. 

   


e- pH

is a measure of acidity or alkalinity of drilling mud as expressed in the hydrogen ion concentration . It is used as an aid in determining for type of mud treatment and as indication of contaminants such as cement, gypsum .

f- Filtration (Wl)

is a measurement liquid filtrate of the drilling mud. It measure the ability of the solid components to form a thin, low permeability filter cake.