Process and composition for cementing casing in a well

Details Process and composition for cementing casing in a well Process and composition for cementing casing in a well

1976-07-12

1977-07-19

Novosad, Stephen J.

Wells

Processes

Cementing, plugging or consolidating

106 96, 106315, 166295, E21B 3314

Patent

active

040363015

ABSTRACT:
A process for reducing the waiting-on-cement (WOC) time associated with the cementing of a casing string in an oil well involving the specific improvement of pumping into the well a highly retarded cement slurry containing a dispersed encapsulated accelerator, such as calcium chloride or anhydrous sodium metasilicate, wherein the encapsulating material is specifically selected such that it will melt at a temperature above the bottom-hole circulating temperature but below the bottomhole static temperature of the well to be cemented. Petroleum-derived waxes and petroleum-derived waxes in combination with vinyl resins, such as wax-compatible copolymers of ethylene and vinyl acetate, are particularly suitable as the meltable encapsulating material exhibiting excellent strength and abrasion resistance as well as serving as a moisture barrier. The improved process is particularly useful in cementing deep hot wells.

REFERENCES:
patent: 2621132 (1952-12-01), Saal
patent: 2848340 (1958-08-01), Haldas
patent: 2985239 (1961-05-01), Shell
patent: 3028913 (1962-04-01), Armentrout
patent: 3368623 (1968-02-01), Carter et al.
patent: 3420299 (1969-01-01), Cloud
patent: 3804058 (1974-04-01), Messenger
patent: 3873332 (1975-03-01), McCreight
Taylor, W. H., Concrete Technology and Practice, (1965), published by American Elsevier Co., Inc., N. Y., pp. 185, 357 and 612.

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