Balanced-activity improved inverse emulsion to inhibit...

Details Balanced-activity improved inverse emulsion to inhibit... Balanced-activity improved inverse emulsion to inhibit...

C - Chemistry, Metallurgy

09

K

31/8

C09K 8/36 (2006.01)

Patent

CA 1189300

A BALANCED-ACTIVITY IMPROVED INVERSE EMULSION TO INHIBIT BRITTLE LUTITE HYDRATION IN OIL FIELDS ABSTRACT OF THE DISCLOSURE This invention refers to an improved inverse emulsion that allows the adjustment of the dispersed- phase activity, when used as a drilling fluid or a fluid to repair oil fields in order to inhibit brittle lutite hydration, or else when it is used as packing fluid to drag or suspend cuttings made by the drilling bit in said wells. The emulsion comprises the following components: heavy oil, brine, viscosity agent, with thermostabilizing properties in addition to being the main controller of filtration properties, as well as secondary emulsifier, main emulsifying agent; thickening agent; gelatinizing additive; and an alkaline earth metal hydroxide. The balanced-activity feature consists of feasibility to equal inverse emulsion brine activity with that pertaining to the formation to be drilled, in such a way as to avoid hole collapsing, causing improved well gage stability.

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