Occasionally, segregation can occur in a cement slurry. This segregation may be in the form of water separation (known as free fluid) or in solid particle sedimentation. In either case, a material to suspend the solids is used to maintain slurry integrity, and our oil and gas anti-settling agents created by Petrochem are highly compatible with multiple types of additives that have positive side effects when mixed. Prevent segregation with free water in cement slurries by controlling water separation with anti-settling agents.
These three properties depend on maintaining a solids-to-fluid ratio throughout the wellbore:
Under wellbore conditions within a graduated cylinder, free water in cement slurries can take the form of channels along one side of a deviated wellbore or pockets of water within a vertical column of set cement. Our anti-settling agent for oilfield cement is important because free water is present in all cement but reacts differently with additives:
The mixing energy needs to be considered a factor within the design phase of a P-HTAS slurry. Lower mixing energies in the field and high mixing energies in a laboratory will produce high fluid loss values and higher rheologies. Processes should be changed in order to take into consideration of field mixing problems including:
What is a stable slurry?
A stable slurry is when a cement slurry remains consistent. There are two ways to measure the slurry stability; through a free-fluid test and a sedimentation test. When the terminal velocity of the particles is very minuscule, this is when stable slurries have been acquired.
What are the rheological properties of concrete?
Rheological properties of concrete deal with the water in the cement and the chemical interactions in the cement. The rheological properties of concrete rely on the formation and gradation of the aggregates within the cement mixture. The rheological properties of concrete is how the materials in the cement circulate.
How does gradation affect the concrete mix?
The gradation affects the concrete mix because it decides how much paste will be required in order for the concrete to be viable. The gradation is a vital aspect to increase or decrease the durability of the cement. The density and workability of the mix are directly correlated to the grading of aggregate.
Contact an Anti Settling Specialist today
At Petrochem, our oil and gas anti-settling additives help to increase rheological values which in exchange reduces sedimentation, free water, and density gradation. Water separation is an occasional problem that happens for field workers that need a solution to make sure the water/cement ratio is close to perfect to get the best product out of a slurry. Contact a concrete additive manufacturer today to learn how anti-settling additives can help your businesses’ needs in the oil field industry.