Wells – Processes – Cementing – plugging or consolidating
Patent
1984-05-31
1985-05-28
Suchfield, George A.
Wells
Processes
Cementing, plugging or consolidating
166293, E21B 3314, E21B 3604
Patent
active
045194521
ABSTRACT:
A method of drilling and cementing a well using a novel drilling fluid convertible in place by the extrinsic application of heat into a settable cement slurry and composition therefor. The novel drilling fluid comprises an aqueous drilling mud containing in intimate admixture therewith cement and a thermally deactivatable deflocculant which prevents the cement from setting while the fluid is being used as a drilling mud. The method comprises drilling a well with a rotary bit through which the novel drilling fluid is circulated; suspending a casing in the well; removing the fluid from inside the casing; and applying sufficient extrinsic heat to the fluid in place in the annulus of the well to deactivate the deflocculant, thereby converting the fluid in place into a settable cement slurry.
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Binder, Jr. George G.
Tsao Yuh-Hwang
Exxon Production Research Co.
Riley James H.
Suchfield George A.
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