OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
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OFITE’s Model 20 Constant Speed Blender was designed to prepare well
cements for testing according to the guidelines stated within API Specification
10. Research has demonstrated that the properties of well cements are
highly dependent upon mixing procedures. In addition, studies have indicated
that when constant speed blenders/mixers are used, data obtained from
thickening time tests has greater reproducibility and generally correlates
better with data obtained from other laboratories. The Model 20 was designed
to provide a means of consistently preparing cement slurries for testing
purposes and can be utilized to mix cements according to the procedures
stated by the API.
The proper amount of mix water is carefully weighed and poured into the
mixing container of the blender. The rotational speed is set to 4,000 RPM
and allowed to stabilize at this speed. The “TIMER” switch is pressed and
the cement is immediately added to the mix water. The cement should be
uniformly added to the water in less than 15 seconds. After 15 seconds the
rotational speed is automatically increased to 12,000 RPM and the slurry is
mixed an additional 35 seconds. A microprocessor is utilized to maintain the
rotational speed within the recommendations established by the API and is
independent of fluctuations in line voltage and the viscosity of the cement
slurry.
The 120-60-F Constant Speed Blender is intended for testing Fracturing
Fluids. The rotational speeds are set to 500 and 1,000 RPM respectively.
Intro
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