Valve assembly with a filter chamber
AssigneeWeatherford U.K. Limited
InventorsDaniel George Purkis, William Murray
Life of this patent
Estimating the term…
Abstract
A valve assembly (10) comprises a flow path extending from an assembly inlet (20) to an assembly outlet (22), a valve (24a/26a) arranged within the flow path and a filter assembly arranged within the flow path between the assembly inlet and the valve. The filter assembly comprises a filter chamber defining a particle settlement region, a filter chamber inlet for facilitating inflow of a fluid into the chamber, and a filter chamber outlet for facilitating outflow of fluid from the chamber towards the valve, wherein the filter chamber outlet includes a particle filter.
Claims22
A downhole valve assembly for location within a wellbore, comprising:
- a flow path extending from an assembly inlet to an assembly outlet;
- a valve arranged within the flow path;
- and
- a filter assembly arranged within the flow path on one axial side of the valve and between the assembly inlet and the valve, the filter assembly comprising:
- a filter chamber defining a particle settlement region located at a base of the filter chamber;
- a filter chamber inlet located at a top of the filter chamber for facilitating inflow of a fluid into the filter chamber;
- an inlet tube coupled to the filter chamber inlet and configured to deviate the fluid flow from being aligned with a central axis of the downhole valve assembly;
- and
- an outlet tube defining part of the flow path and extending partially into the filter chamber from the base of the filter chamber and through the particle settlement region, the outlet tube including a filter chamber outlet in a wall thereof such that the filter chamber outlet is located within the filter chamber intermediate the base and the top of said filter chamber for facilitating outflow of fluid from the filter chamber towards the valve, wherein the filter chamber outlet includes a particle filter.
Dependencies are inferred from the claim text.