Fluid communication method for hydraulic fracturing

Abstract

Aspects of the disclosed technology provide techniques for facilitating hydrocarbon extraction from a wellbore. In some aspects, the disclosed technology encompasses a novel casing string that includes at least one casing section, an aperture disposed on a surface of the casing section, and an insert affixed around a periphery of the aperture. The casing string can further include a plug disposed within the insert, wherein the plug is configured to be selectively removable to allow fluid communication between an interior volume of the casing string and an exterior of the casing string, e.g., adjacent to a geologic formation.

Description

TECHNICAL FIELD[0001]The present disclosure relates generally solutions for preventing erosive enlargement of fluid communication holes in a wellbore casing and in particular, to the fitting of casing perforations with wear-resistant inserts to protect against erosion and ensure consistent perforation aperture size.BACKGROUND[0002]To obtain hydrocarbons such as oil and gas, wellbores are typically drilled by rotating a drill bit that is attached at the end of the drill string. Modern drilling systems frequently employ a drill string having a bottom hole assembly and a drill bit at an end thereof. The drill bit is rotated by a downhole motor of the bottom hole assembly and / or by rotating the drill string. Pressurized drilling fluid is pumped through the drill string to power the downhole motor, provide lubrication and cooling to the drill bit and other components, and carry away formation cuttings.[0003]A large proportion of drilling activity involves directional drilling, e.g., dril...

AI Technical Summary

Benefits of technology

The patent describes a casing string for use in oil wells that allows for fluid communication between the wellbore and the formation. The casing string includes an aperture, an insert, and a removable plug. The insert prevents erosion of the internal edge of the aperture to maintain its size. The plug can be removed using an explosive charge, heat, chemical cutters, or dissolution. The chemical solution can include bromine tri-fluoride or an acid. The method includes using the casing string and plug in oil wells to facilitate the production of oil. The technical effect of the invention is to improve the efficiency and safety of oil well drilling, minimize damage to the wellbore, and facilitate the extraction of oil from geological formations.

Problems solved by technology

One challenge in maintaining fluid communication through the perforations is that the size of the perforations (aperture size or aperture diameter) in the wellbore casing sections begins to change as the edges erode.

These erosions introduce uncertainties in otherwise controllable parameters, such as fluid pressure and flow rates.

These logging and telemetry assemblies consume power, which must often be routed through the directional sensor section of the drill string, thereby producing stray EM fields which interfere with the magnetic sensors.

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