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:
May. 27, 1980
Filed:
Mar. 21, 1978
John L Stalder, New Orleans, LA (US);
Conoco, Inc., Ponca City, OK (US);
Abstract
A method for the insertion of shear degradable aqueous polymer solutions in a polymer thickened flood wherein a series of pumps are used in a multi-branch system, while reducing shear degradation while maintaining pressure and rate control within any branch of said multibranch system comprising utilizing hydraulic drivers for the pumps wherein the hydraulic power source for the drivers is controlled (a) by a pressure sensing loop such that a selected preset pressure will not be exceeded by any branch of the injection system, and (b) by a rate proportioning control loop whereby the injection rate in the various branches of the multi-branch system will be maintained in a given proportion to one another regardless of rate changes in a designated master branch or in the total injection stream. Polymer shear rates are reduced by using plunger pumps, progressive cavity pumps, diaphram pumps or other low shear pumps for the polymer injection while utilizing throttle valves and hydraulic pumps for the hydraulic oil power system. An optional manually controlled variable speed drive can minimize the amount of bypassed hydraulic power oil.