Expansion Cell Mold
Model #: Expansion Cell Mold
Cement Test Equipment expansion cell molds are designed to simulate the expansion properties of cement compositions placed into the annulus of a well. In a typical well cementing operation, a cement slurry is run into the annulus between the well casing and the bore hole, frequently at more than one location in the bore hole. As the cement slurry hardens to a solid during the setting-up period, it is essential that the cement composition expand sufficiently to provide a good bond with the well casing and also the wall of the borehole. Otherwise, if the cement should shrink during hardening, it can leave channels between the borehole wall and the cement column and between the cement column and the well casing. This “channeling” effect is undesirable for several reasons. One reason is that gas or oil from a producing formation could leak into these channels and thus by-pass the production tubing which carries it to the well head.
The expansion mold’s cylindrical outer sleeve has a vertical slit on one
side to allow the sleeve to expand. Pins are located on opposite sides of
the slit. A spring is utilized across the pins to keep the sleeve in a closed
position before a test has begun. In the test procedure, the sleeve is filled
with wet cement, which is then cured to a solid phase. As the cement
cures it causes the sleeve to expand along with the spring. The actual
expansion of the sleeve represents an expansion factor for the cement.
This factor is calculated by measuring the distance across the pins,
before and after the cured cement expands the sleeve. CTE offers two
sizes of expansion molds, one to fit CTE curing chamber pressure vessels
and another to fit CTE UCA pressure vessels. Mold units are stackable.
The molds may also be used in waters baths for example. Made from
high-quality, stainless steel in the USA. The material is non-corrosive,
ultra durable and will last a long time with proper handling and
maintanence. An optional stainless steel bucket is available for water/
oil separation testing requirements on the larger curing chamber size
only. Please also specify if you require the appropriate micrometer.
Part #; Model; Height; Diameter; Weight; AVG ID
05-0100-1; UCA; 1.16” (2.95cm); 2.18” (5.5cm); 0.51lbs (0.23kg); 1.79” (4.55cm)
05-0100-2; Curing Chamber; 1.29” (3.3cm); 3.9” (10cm); 2.2lbs (1kg); 3.35” (8.5cm)
Suitable micrometers and stainless steel buckets available upon request.