Well forming process

Details Well forming process Well forming process

1989-02-28

1990-05-15

Suchfield, George A.

Wells

Processes

Cementing, plugging or consolidating

166292, 175 72, 106 89, 106 98, E21B 33138, E21B 3314, E21B 3316

Patent

active

049249428

ABSTRACT:
A thixotropic preflush fluid is employed in a well drilling operation to prevent loss of cement slurry to an air zone penetrated during the drilling operation. The preflush fluid comprises water, a cement, calcium sulfate, and a quick-hardening accelerator. Optionally, the preflush fluid also comprises a thickening agent.

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