Methods of forming a chemical casing

Details Methods of forming a chemical casing Methods of forming a chemical casing

2005-02-01

2005-02-01

Suchfield, George (Department: 3672)

Boring or penetrating the earth

Processes

Chemical reaction with earth formation or drilling fluid...

C166S295000, C166S300000, C175S065000, C175S072000, C507S110000, C507S118000, C507S119000, C507S120000, C507S140000, C507S220000, C507S903000

Reexamination Certificate

active

06848519

ABSTRACT:
Methods of forming chemical casings include drilling a well bore with a drilling fluid having a pH in the range of from about 6 to 10 and comprising water, a water soluble or water dispersible polymer which is capable of being cross-linked by a thermoset resin and causing the resin to be hard and tough when cured, a particulate curable solid thermoset resin, a water soluble or dispersible thermoset resin, and a delayed dispersible acid-catalyst for curing the solid thermoset resin and the water soluble thermoset resin, whereby the drilling fluid forms a filter cake on the walls of the wellbore that cures into a hard and tough cross-linked chemical casing thereon.

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