Well cementing compositions and method

Abstract

Abstract AN ADITIVE COMPOSITION FOR ENHANCING THE PROPERTIES OF CEMENT COMPOSITIONS, AND CEMENT COMPOSITION OF ENHANCED PROPERTIES, PARTICULARLY USEFUL IN THE CEMENTING OF WELLS, AND METHODS OF CEMENTING GEOLOGIC FORMATIONS TRAVERSED BY WELL BORES ARE DISCLOSED. THE ADDITIVE COMPOSITION COMPRISES A WATER SOLUBLE LIGNOSULFONATE OR LIGNOSULFONIC ACID OR MIXTURES THEREOF, TARTARIC ACID IR A SALT OF TARTARTIC ACID OR MIXTURES THEREOF AND SODIUM NAPTHALENE SULFONATE, AND PREFERABLY ABOUT 3 PARTS CALCIUM LIGNOSULFONATE, ONE PART TARTARTIC ACID AND FOUR PARTS SODIUM NAPTHALENE SULFONATE, ALTHOUGH GOOD RESULTS ARE OBTAINED WITH 1 TO 19 PARTS LIGNOSULFONATE OR LIGNOSULFONIC ACID AND 19 TO 1 PARTS TARTARTIC ACID OR A SAULT OF TARTARTIC ACID ADMIXED WITH 1 TO 19 PARTS OF SODIUM NAPTHALENE SULFONATE. THE CEMENT COMPOSITION INCLUDES A HYDRAULIC CEMENT AND PREFERABLY ABOUT 2% OF THE ADDITIVE COMPOSITION BASED ON THE WEIGHT OF THE CEMENT; ALTHOUGH, GOOD RESULTS ARE OBTAINED WITH FROM ABOUT 0.30% TO ABOUT 5.00%. ESPECIALLY GOOD RESULTS ARE OBTAINED WHEN THE HYDRAULIC CEMENT HAS BEEN PRETREATED AND AGED AS IN OUR COPENDING APPLICATION FILED JAN. 25, 1971, SER. NO. 109, 606. THE CEMENT COMPOSITION HAS GOOD INITIAL VISCOSITY AND STRENGTH, IDEAL THICKENING TIMES, AND A REDUCED AMOUNT OF MIX WATER MAY BE USED THEREBY INCREASING THE WEIGHT OF THE CEMENT SLURRY TO ABOUT EIGHTEEN POUNDS PER GALLON WITHOUT USING WEIGHT MATERIALS.

Inventors

• 👤 W Haldas
• 👤 J Faust

Bibliographic Details