Apparatus and process for removing liquids from drill cuttings

Boring or penetrating the earth – Processes – Boring with specific fluid

Reexamination Certificate

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Details

C134S025100, C134S025500, C134S105000, C175S206000, C175S207000, C210S770000, C210S771000, C588S900000

Reexamination Certificate

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07337860

ABSTRACT:
Drill cuttings associated with drilling fluid are thermally cleaned. The wet cuttings are fed into a vessel chamber having mechanical mixers, such as ribbon blenders, extending lengthwise of the chamber. Direct heating is applied to the chamber contents by introducing hot combustion gas from a heater. A combination of direct heating and mechanical back mixing of wet colder cuttings with drier hotter cuttings results in conditioning and conduction heating of the wet cuttings. The drilling fluid is evaporated and removed as gas. Dried cuttings are separately recovered. Caking and agglomeration of the solids is reduced.

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