FILTER ASSEMBLY

• US 20180363427A1
• Filed: 08/28/2018
• Published: 12/20/2018
• Est. Priority Date: 07/27/2015
• Status: Active Grant

• Current Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Original Assignee: Halliburton Energy Services Incorporated (Halliburton Company)
• Inventors: Gao, Bo, Budler, Nicholas, Xin, Linda
• Granted Patent: US 10,233,731 B2
• Time in Patent Office: Days
• CPC Class Codes: E21B 27/005 Collecting means with a strainer
• CPC Class Codes: E21B 33/14 for cementing casings into boreholes
• CPC Class Codes: E21B 34/06 in wells
• CPC Class Codes: E21B 43/02 Subsoil filtering

Abstract

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.

Claims

1. An assembly comprising:

a slotted filter that is generally circular in shape and positionable within a casing string, the slotted filter including multiple filter chambers, each of the multiple filter chambers comprising;

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.

2. The assembly of claim 1, wherein the bottom surface is a solid surface without any slots.

3. The assembly of claim 1, wherein the slots have a width in a range of approximately 0.1 mm to approximately 0.5 mm.

4. The assembly of claim 1, wherein the slotted filter comprises a drillable material.

5. The assembly of claim 1, wherein the centrifuge includes:

a plurality of blades, each of the plurality of blades having non-intersecting slots for filtering the debris particles from a fluid flowing through the centrifuge; and

a groove on an outer edge of each of the plurality of blades for collecting the debris particles filtered from the fluid flowing through the centrifuge.

6. The assembly of claim 1, wherein the slots of the side walls are angled towards the bottom surface for directing debris particles towards the bottom surface of the filter chamber.

7. The assembly of claim 1, wherein the slotted filter has a width that can be in a range of approximate 5% to approximately 15% of an inner diameter of the casing string.