AIM: To prepare a Neat Cement Slurry.
Neat cement slurry is used in cementing fresh
water zones to prevent the contamination of fresh water.
Neat cement slurry is useful for cementing top
hole section where cement rheology is important
This experiment covers the experimental preparation
of neat cement slurry.
THEORY: Cement slurry is a mixture of cement and water only,
Neat cement slurry, that is, cement without additives is used during, cementing
operations to isolate fresh water zones, thereby, avoiding freshwater
792g Of cement (dry) should be measured out
using Analytical balance.
349Ml of water should be measured out using the
The measured quantity of water should be placed
in the mixing blender and mixed at a speed of 400rpm
The measured cement sample should be added in not more than 15 seconds into the
water in mixing blender
When the cement is added the mixing blender
should be stirred continuously using a spatula and the speed of rotation
increased to 12,000rpm
The cement and water mixture should left on the
blender for at least 35 seconds at a speed of 12,000rpm, after the blender
should be switched off.
It will be observed that the temperature of the mixing blender container increased during the blending, this shows that cement mixing and setting is an exothermic reaction.
1. Care must be taken when transferring the dry cement into the mixing blender to prevent spillage.
2. Ensure that the analytical balance was zeroed before taking measurement