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Dynamic HTHP Filtration

Dynamic HTHP Filtration

There are two kinds of filtrations during drilling and completion operations. One is the static filtration after stopping the circulation of drilling fluids. The mud cake thickness increases gradually and the filtration rate decreases with time. Another is the dynamic filtration when the mud cake formed is eroded by circulating drilling fluids. There is no a proportional relationship between static filtration and dynamic filtration of differential drilling fluids. Therefore, the measurement of dynamic filter loss is particularly important.

Utilizing a wide range of available filter mediums, the DYNAMIC HPHT filtration system can be heated and pressurized to provide the closest possible simulation of down-hole conditions. Several safety features have been designed into the system to protect the user and help ensure reliable test results. It can be used to measure the filtration property of drilling fluids and cement slurry accurately and safely under static and dynamic conditions. 

Applications: It is an instrument used to measure the filter loss of drilling fluids and cement slurries used in deep wells. It can be applied in the following aspects:

(1) The experiments of static filtration and mud cake preparation. The temperature range is from room temperature to 232 and the maximum of working pressure of mud sample cup is less than 7.1MPa. Pressure difference of filtration is 3.5MPa. The filtration area is 22.6cm2.

(2) The experiments of dynamic filtration and mud cake preparation. The temperature range is from room temperature to 150 and the maximum of working pressure of mud sample cup is less than 7.1MPa. Pressure difference of filtration is 3.5MPa. The filtration area is 22.6cm2.

(3) It has double filter screens and is suitable for the measurements of cement slurries.

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