The Constant Speed Blender is designed to prepare a cement slurry by mixing it at constant speeds according to API guidelines. The blender begins by mixing at 4000 rpm for 30 seconds. It then increases the speed to 12000 rpm for 60 seconds. As the slurry thickens, the onboard controller continuously adjusts the current to the motor in order to maintain the proper mixing speed.
The new Model 25 Constant Speed Blender from OFITE brings you the same functionality as the older Model 20 Blender in a more compact, economical package. The timer and speed controls are now integrated into the blending unit, eliminating the need for a separate control box. The result is a smaller, lighter unit that takes up less space in your lab and is easily portable.
Cement slurries used in the oil field are dynamic fluids with complex chemistries. Laboratories tasked with the development of slurries used for cement pumping operations strive to prepare these mixtures under conditions that reflect those found out in the field. With the replication of conditions that are as close as possible to those found out at the wellsite, technicians are able to make accurate predictions the behavior of cement slurries under those same conditions.
The most basic way to ensure that lab-prepared slurries match the performance of field-prepared counterparts begins with a properly mixed slurry. Cement laboratories use a constant speed mixer to ensure that mixed cement slurries are a homogeneous blend. The proper amount of mixing energy ensures that individual cement grains are completely surrounded by water which kicks off the cement hydration process. Laboratory technicians are then able to perform the remainder of their evaluation tests confident with the knowledge that any results produced properly predict the performance of the cement slurry under field conditions.