Abstract
Abstract Correlation of anticipated and actual cement slurry performance has been improved by combining microprocessor-based density control with a recirculating cement mixer. After desired density is set from a membrane keypad, the system's electrically and pneumatically operated controls keep the slurry density within ±.1 lb/gal of selected density. Density setpoint may be changed during the job. The density of cement slurry as mixed on the surface is critical to the ultimate performance of the slurry downhole. In deep, hot holes, density control is especially critical, and the need for dependable performance is intensified. Accuracy of the automated system exceeds human capabilities to maintain slurry density throughout an entire cement job. Subject paper presents operating description and specifications of the system, including schematic diagrams. The manual backup system is described. Density control documentation from actual cement jobs is presented.
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