Compositions and processes for treating subterranean formations

Details Compositions and processes for treating subterranean formations Compositions and processes for treating subterranean formations

2006-03-21

2006-03-21

Glessner, Brian E. (Department: 3676)

Boring or penetrating the earth

Processes

Chemical reaction with earth formation or drilling fluid...

C175S065000, C175S072000, C166S294000, C166S300000

Reexamination Certificate

active

07013995

ABSTRACT:
A method and materials for stabilizing a wellbore against excess fluid pressure is described. It comprises forming or placing a flexible and essentially impermeable lining on or in the wellbore wall. The flexibility of the lining ensures that it remains in compression as the pressure in the wellbore is increased above the fluid pressure in the surrounding rock and it therefore does not need high tensile strength. The lining may be a preformed elastomer sleeve or formed in situ by the use of a reactive drilling fluid. Appropriate reactive formulations are described for the situation where the rock contains significant quantities of clay.

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