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:
Feb. 05, 1980
Filed:
Aug. 30, 1978
Thomas C Mondshine, Houston, TX (US);
Texas Brine Corporation, Houston, TX (US);
Abstract
A nondamaging work over and completion fluid having water soluble bridging agents includes a saturated brine solution having at least one water soluble salt which is insoluble in the saturated brine solution and having particle size range of about 5 microns to about 800 microns and wherein greater than about 5% of the particles are coarser than 44 microns. Viscosifier and suspension additive is added to provide the desired viscosity and assist in maintaining the water soluble sized salt suspended in the saturated brine solution. If desired or necessary a fluid loss control agent may be added to enhance the fluid loss control or filtration control of the completion fluid. The invention may be practiced by pumping or discharging the fluid or a slug or pill of the fluid into an oil, gas, water, injection or storage well where operations are to be conducted in which it is desired to temporarily plug the permeable zone while such operations are carried out. Thereafter, the water soluble bridging agents are removed by connate water from the permeable zone, or a nonsaturated brine wash, or ordinary water circulated in the well.