OFITE, 11302 Steeplecrest Dr., Houston, TX 77065 USA / Tel: 832-320-7300 / Fax: 713-880-9886 / www.ofite.com
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Fluid Expansion Space
Cells should never be filled completely with fluid. Always leave some room for
the fluid to expand under temperature. This keeps the cell caps from becom
-
ing overstressed and possibly leading to a cell pressure failure or even a loss
of the cell cap completely.
Periodically check all gauges to ensure the proper pressures are in the cell,
as the pressure often increases or decreases depending upon the test proce
-
dure and conditions.
Cell Corrosion
Test fluids under high tempreature and pressure can corrode the cell body
and caps. Carefully inspect the cell body and calls for corrosion before and
after each test.
Some materials are more susceptible to corrosion than other. Also, some
fluids and additives are more corrosive than others. OFITE offers a variety of
cell materials for different levels of corrosion resistance and cost.
API Recommended Void Space
Fluid / Temperature
Void Space
Fluid Volume
Water-based drilling fluid. < 300°F
0.6" (1.5 cm)
138 mL
Water-based drilling fluid. > 300°F
1.5" (4.0 cm)
86 mL
Oil-based drilling fluid. < 350°F (176°C)
1" (2.5 cm)
115 mL
Oil-based drilling fluid. > 350°F (176°C)
Not Recommended-
Use 500 mL Cell
Void Space in a 1,500 psi rated cell body
