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The important functions of drilling fluid shear pump

Shear pump is already used and the theory confirms efficiency and specialized machine that can shear polymer and clay. In drilling system, after the polymer and clay is fully sheared enter into drilling fluid system that can give full play to its function and improve drilling fluid performance.

If it can’t be fully sheared, polymer maybe block shaker screen in first circulation loss large polymer, increase drilling cost and make the large size solid phase particles is harden and difficult to eliminate.

Because don’t have fully shearing in completion fluid the polymer will produce many “fisheye”. The fisheye will damage stratum and make its permeability is decreased, the oil gas level is reduction of output.

shear pump

Shear pump provides high shearing for high molecular polymer to rapidly hydration, solving the problems that the polymer can’t be well hydrated in drilling fluid or completion fluid.

Using shear pump can decrease above 15% of polymer dosage, the dosage of bentonite will be decreased above 30% and improve mud cake and fluid loss, decrease drilling fluid shearing ration rate, improve jelly strength, the shaft seal structure is more reliable has excellent performance and use maintenance is more convenient.

shearing pump

The function of shear pump.

Shear pump can improve the extent of hydration of move soil particles.

The dispersion of move soil particles in water and extent hydration is decided: the content of electrolyte, time, temperature, the number of replacement cationic and concentration. All other things were equal use shear pump can save above 30% bentonite

Shear pump can make polymer shear dilute and hydrate rapidly.
The molecular weight of high-molecular polymer is higher which is used in mud, it is difficult to hydrate is directly added, so to high molecular polymer need be sheared. Shear pump can provide high shearing efficiency and to speed up the polymer dilution, hydration process.
Shear pump can provide higher head and displacement can meet the requirement of matching and dispose mud.


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