Halliburton Energy Services, Inc.

Linda Xin

Nicholas Frederick Budler

Bo Gao

A method of filtering a wellbore fluid can include receiving a wellbore fluid in a chamber. The chamber can be defined by an inner surface of a casing string that is positioned downhole in a wellbore. The method can further include filtering debris particles from the wellbore fluid by a filter assembly positioned within an inner region of the casing string. The filter assembly may include a plurality of slots and the filter assembly may be rotated by the wellbore fluid passing through the plurality of slots in the filter assembly.

Method of filtering a wellbore fluid

An assembly can include a filter body having an open end and a closed end. The filter body can also include a plurality of perforations. A fan may be positionable within the filter body. The fan may include a mount that extends along a length of the fan. A blade may be coupled to and extend from the mount. The fan may also include an outer edge of the blade for contacting an inner surface of the filter body.

Self-cleaning filter

An assembly may include a diverter extending inwardly from a casing string and extending along a length of the casing string. The assembly may also include a cavity defined by the diverter and the casing string. The cavity may be for receiving debris particles accumulated by a centrifuge positioned proximate to the diverter. The assembly may also include a valve extending between an inner surface of the casing string and an outer surface of the casing string, the valve may be in fluid communication with the cavity.

Centrifugal particle accumulator and filter

An apparatus may include a slotted filter that is generally circular in shape and positionable within a casing string. The slotted filter may include multiple filter chambers. Each of the multiple filter chambers may include a rear wall; side walls that intersect the rear wall; slots in the rear wall and the side walls; a bottom surface; and an open end positionable proximate to a centrifuge in the casing string for receiving a fluid containing debris particles collected by the centrifuge.

Filter assembly

An apparatus can include a first curved blade for use in a centrifuge. The centrifuge can be for collecting debris particles in a fluid flowing through the centrifuge. The first curved blade can include a plurality of eccentric slots. The first curved blade can include a groove positioned at an outer edge of the curved blade. The first curved blade can also include a first mating element and a second mating element. The first and second mating elements can be for coupling the first curved blade to a second curved blade about a central axis.

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Spring, TX, United States of America

Linda Xin