Production filtering system and methods

摘要

Systems and methods for filtering a production stream downhole that involves creating a basepipe annulus and a casing annulus and forcing the production stream through a filter between the casing annulus and the basepipe annulus before combining the production stream with a previously filtered production stream. Other systems and methods are disclosed.

主权项

1. A system for filtering a production stream radially exterior to a tailpipe and radially interior to a casing in order to produce a first filtered production stream for introduction into the tailpipe having a second filtered production stream, the system comprising:
the tailpipe having a tailpipe inside diameter and a tailpipe outside diameter, the tailpipe for coupling to a lower end of a production stream and for disposing within the casing having a casing inside diameter; a basepipe having a basepipe inside diameter and a basepipe outside diameter, wherein the basepipe inside diameter is greater than the tailpipe outside diameter to create a basepipe annulus and wherein the basepipe outside diameter is less than the casing inside diameter to create a casing annulus and wherein the basepipe has a first end and a second end and a medial portion between the first end and second end; a first tailpipe attachment device and a second tailpipe attachment device, wherein the second tailpipe attachment device is coupled to the second end of the basepipe and to the tailpipe to create a fluid seal at one end of the basepipe annulus between the basepipe and the tailpipe, and wherein the first tailpipe attachment device is for centering the first end of basepipe; a flow diverter coupled to an exterior of the basepipe for substantially sealing flow in the casing annulus; a plurality of filter apertures formed on the medial portion of the basepipe upstream of the flowed diverter; a screening device coupled over the plurality of apertures to create a filter on the basepipe; and a plurality of return apertures for fluidly coupling the base annulus with the casing annulus downstream of the flow diverter.