Rheological properties refer to the Bingham plastic fluid parameters such as yield point (YP) and plastic viscosity (PV). It is one of the several flow characteristics of drilling fluid, workover fluid or completion fluid or cement. At least two shear rates are used to make measurement of shear stress to define drilling fluid properties.
The drilling fluid should have good rheological characteristics for good performance during drilling operation.
Drilling fluids consist of many additives like bentonite, barite and hematite that are mixed in the mud to enhance rheological properties such as density, yield point, plastic viscosity and gel strength. Drilling fluid serves many functions such as lubricating the borehole, cooling and cleaning the drill bit, borehole stability, suspending cuttings in the annulus, transporting the cuttings out of the annulus and assist in cementing and well completion.
钻井流体功能受其流变性质的影响很大。
Synonyms
流变性质
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