Method for configuring weighted drilling fluid

Abstract

The invention provides a preparation method of weighted drilling fluid, wherein, a plurality of pieces of milling equipment are added during the preparation of the weighted drilling fluid on the basis of the conventional processes of stirring and mixing as well as liquid flow shearing, and the series connection, parallel connection or the combination of both is adopted, namely to add a milling procedure. Furthermore, a milling method and the conventional stirring and mixing method, or the milling method and the conventional liquid flow shearing method, are mutually combined to prepare the weighted drilling fluid. The milling equipment comprises any machine product that is provided with the structure of flexible and static cutting discs or a stator and a rotor and generates the milling function by relative motion, such as a colloid mill, an asphalt colloid mill, a food paste mill, etc. By adopting the milling method, the weighted drilling fluid prepared can be not only applied to the laboratory evaluation, but also applied to the factory-like production or the on-site petroleum drilling; the maximum density of the prepared drilling fluid can be up to 3.0 g / cm<3>.

Description

technical field The invention belongs to the field of petroleum drilling, and in particular relates to a method for preparing heavy drilling fluid by grinding. Background technique Drilling fluid is a circulating fluid used in oil drilling. It is a colloidal suspension prepared by adding solid substances to liquid (water or oil). The traditional method of preparing drilling fluid is to add solid substances into the liquid by stirring and mixing (mixer) and liquid flow shearing (nozzle, spray gun), and then repeatedly stir and shear in the circulation process until a stable suspension is formed. body. Due to the large amount of solid substances added in the weighted drilling fluid, it takes a process for the solid substances to dissolve, wet and disperse in the liquid to form a stable suspension. The traditional preparation method mentioned above has a long preparation and cycle time, and the second is to prepare The initial performance of the weighted drilling fluid is poo...

AI Technical Summary

Problems solved by technology

Due to the large amount of solid substances added in the weighted drilling fluid, it takes a process for the solid substances to dissolve, wet and disperse in the liquid to form a stable suspension. The traditional preparation method mentioned above has a long preparation and cycle time, and the second is to prepare The initial performance of the heavy drilling fluid is poor

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