Chemical means to predict end of job in reverse-circulation cementing

Methods and systems for cementing casing in a wellbore are described. The methods include introducing a modified biopolymer into an inner diameter of the casing, reverse-circulating a cement composition in the wellbore, permitting the modified biopolymer to contact the cement composition, and termin...

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Bibliographische Detailangaben
Hauptverfasser:	Rahul Chandrakant Patil, Shreya Mohan, Sandip Prabhakar Patil, Siva,Rama Krishna Jandhyala
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE DYES EARTH DRILLING EARTH DRILLING, e.g. DEEP DRILLING FIXED CONSTRUCTIONS LIME, MAGNESIA MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE METALLURGY MINING MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS PAINTS POLISHES REFRACTORIES SLAG TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	Methods and systems for cementing casing in a wellbore are described. The methods include introducing a modified biopolymer into an inner diameter of the casing, reverse-circulating a cement composition in the wellbore, permitting the modified biopolymer to contact the cement composition, and terminating the reverse-circulation upon detection of an increase in pressure in pumping the cement composition. The modified biopolymer includes a reaction product of a biopolymer and an organic carbonate, and the cement composition has a pH greater than 11.