API Mixing Energy Proposal June 24 28 2013

API Mixing Energy Proposal June 24 -28, 2013 Presented by Jim Davison, Ametek-Chandler Engineering with Terry Dammel & Joe Day, Schlumberger

Project Goals Assign a Mixing Energy to each Cement Slurry • Step 1 - Laboratory testing with a Lab Blender • Time to reach a vortex at 4000 rpm • Calculate a Mixing Energy value • Step 2 – Field Mixing Equipment • Determine the Mixing Energy of your Field Equipment • Calculate the time needed to Mix the Cement Slurry

Parameters Standard API Lab Blender • Exception to Standard API Mix • Alter 15 seconds at 4000 rpm • Time mix at 4000 rpm until a stable vortex is reached. • Once a vortex is reached mix at 12, 000 rpm for 35 seconds. • Calculate Mixing Energy • The energy needed to hydrate a slurry

Mixing Energy Calculations for the Lab Blender

API Specification 10 A

Mixing Energy Video

Mixing Energy Values

Mixing Energy Values

Questions • Why does this brand of Class H cement require a high mixing energy? • Why the difference between two buckets of the same lot? • Will it be able to be mixed in the field? • Will it be able to be pumped on the fly?

Questions for API • How do we know if a cement slurry can be mixed? • Can this procedure be adapted as a part of API testing? • Should 15 seconds at 4000 rpm be applied once a vortex is achieved?

API RP 10 B-2 Proposal 5. 3. 4 Mixing of Cement and Water REWRITE TO INCLUDE THE FOLLOWING: Document the time to reach a vortex and calculate this as the mixing energy to completely wet the cement blend.