The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1994
Filed:
Aug. 02, 1989
Greg Cedillo, Houston, TX (US);
Thomas A Robertson, Houston, TX (US);
Frank C South, Jr, Spring, TX (US);
Robert A Baten, Houston, TX (US);
Bruce A Vicknair, Baytown, TX (US);
Stewart & Stevenson Services, Inc., Houston, TX (US);
Abstract
An automated density and chemical controller automatically controls the density and chemical proportions of a slurry that is injected into a well during a well fracturing operation to produce a slurry with a desired density. The automated controller automatically controls the addition of a proppant to water based on the parameters of the fracturing operation, the incoming flow of water into a blender tub, the incoming flow rate of chemicals, and the performance characteristics of the mechanism used to deliver the proppant. The automated density controller also measures the flow of the slurry discharged from the blender tub and calculates the actual density of the slurry. After comparing the calculated actual density with the desired density, the automated density controller calculates a correction factor and recalibrates the performance characteristics of the proppant delivery mechanism. The automated density controller also includes a densiometer for measuring the actual density of the slurry. The actual density measured by the densiometer is compared with the calculated actual density to provide an indication of whether the controller is operating correctly.