Methods of forming isocyanate polymers for earth-sealing operati

Details Methods of forming isocyanate polymers for earth-sealing operati Methods of forming isocyanate polymers for earth-sealing operati

1980-06-02

1982-12-28

Cockeram, H. S.

Wells

Processes

Cementing, plugging or consolidating

521124, 521126, 521127, 521129, 521174, 521914, 521917, 524906, 524476, 524590, 528 54, 528 55, 528 61, 528 64, 528 59, 528 75, C08G 1814, C08G 1822, E21B 3113

Patent

active

043656706

ABSTRACT:
Methods of sealing particular areas, including subterranean well formations, are provided wherein the methods utilize an isocyanate polymer suitable as a sealing agent having a controllable gelation time in the presence of water without formation of excess foam by using one or more typical di- or polyisocyanates with one or more alcoholic or acidic compounds and a particular catalyst namely, triethylene-diamine, Groups 3 and 4 metal-organic compounds or mixtures thereof. A particularly useful catalyst is tributyl titanate.

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