Mr. Erik Milito - The House Committee on Natural Resources ...

80 API STANDARD 65-2
Job Execution
A well executed cement job is critical to isolating potential flow zones.
Circulation and
Conditioning
Density Control
Pre-flushes and
Spacers
Placement Rates
Centralizers
Special Blending
Mixing
Liquid Additive
System
Was the well circulated and the drilling fluid conditioned prior to cementing
Was the cement placed across potential flow zones mixed within a density range or solid to liquid ratio
range that did not compromise the slurry performance (static gel strength, thickening time, etc.) required for
flow prevention
Were spacers mixed and pumped as designed including rheology, density and volume
Were the placement rates adequate for effective drilling fluid removal
Were centralizers properly installed as designed
If used, were specialty blended cements prepared, transported and stored in accordance with the suppliers
established guidelines
If used, was the liquid additive system calibrated before the cement job and was an inventory check
performed after the job to verify actual usage
Post Job Monitoring During WOC was the annulus monitored and kept full
Special Operational Considerations
Barrier Acceptance
Diverter or BOP
Obstruction
Hydrostatic
Overbalance
Foamed Cement
Foamer, Stabilizer
and Nitrogen
Injection
(foamed cement)
Cement Plugs
If the criteria for verification of a mechanical barrier or cement cannot be met the operator shall establish an
appropriate course of action with the regulator or permitting authority.
Operators or rig contractors shall not run tubing in the annulus between the casing and the diverter, or
BOP, after completion of the cementing operation and prior to determining the well has no potential for flow.
<strong>The</strong> operator shall perform hydrostatic pressure calculations to verify sufficient hydrostatic overbalance
pressure throughout the well prior to washing out to the mudline suspension hanger.
Operators and cementing service providers shall perform a risk assessment prior to utilizing foamed
cement to isolate a potential flow zone.
<strong>The</strong> results of this assessment shall be incorporated into the cementing plan.
Will the foamer, stabilizer and nitrogen injection be controlled by an automated process system Were the
foamer, stabilizer and nitrogen ratios within design tolerances
Cement plugs shall be installed and verified as required by regulations.