Methods of treating subterranean zones and viscous aqueous...

Details Methods of treating subterranean zones and viscous aqueous... Methods of treating subterranean zones and viscous aqueous...

2006-08-15

2006-08-15

Suchfield, George (Department: 3676)

Wells

Processes

Graveling or filter forming

C166S300000, C166S305100, C166S308500, C507S213000, C507S276000, C507S277000, C507S903000, C507S921000, C507S922000

Reexamination Certificate

active

07090015

ABSTRACT:
Methods of treating subterranean zones and viscous aqueous fluids containing xanthan biopolymer gelling agent and a combination crosslinker and delayed breaker are provided. A viscous cross-linked aqueous treating fluid of the invention comprises water, a xanthan polymer gelling agent, and a combination cross-linker and delayed breaker for said xanthan biopolymer gelling agent.

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Christensen, B. E., et al,Gelation of Periodate Oxidised Scleroglucan(Scleraldehyde),Carbohydrate Polymers 46(2001) 241-248.
Foreign Search Report and Opinion (PCT Appl. No. GB2004/002669), Dec. 3, 2004.

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