Method of making an anisotropic filtration media

Patent metadata

Field	Value
Publication number	US-9238316-B2
Application number	US-201213596686-A
Country	US
Kind code	B2
Filing date	Aug 28, 2012
Priority date	Sep 30, 2010
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

A method of making an anisotropic filtration media includes foaming a media, straining the media in a selected direction, and relieving strain of the media in the selected direction.

First claim

The invention claimed is:

1. A method of making an anisotropic filtration media, comprising:
foaming a media into a tubular shape;
straining the media in a longitudinal direction of the tubular shape;
relieving strain of the media in the longitudinal direction;
forming a higher percentage of openings in cell walls of the media that are nearer to parallel to the longitudinal direction than to those further from parallel to the longitudinal direction; and
attaching the media around a perforated pipe.

2. The method of making an anisotropic filtration media of claim 1 , further comprising supporting the anisotropic filtration media in all directions orthogonal to the selected direction during the straining.

3. The method of making an anisotropic filtration media of claim 1 , wherein the straining is performed at room temperature.

4. The method of making an anisotropic filtration media of claim 1 , wherein the straining is performed at other than room temperature.

5. The method of making an anisotropic filtration media of claim 1 , wherein the media is configured to expand radially outwardly after having been attached around the perforated pipe.

6. The method of making an anisotropic filtration media of claim 1 , wherein the straining is compressive strain.

7. The method of making an anisotropic filtration media of claim 1 , further comprising compacting the media radially after having been attached around the perforated pipe.

Assignees

• Carrejo Nicholas
• Johnson Michael H
• Guest Randall V
• Baker Hughes Inc

Inventors

• Carrejo Nicholas
• Johnson Michael H
• Guest Randall V

Classifications

• B29C44/5663 Primary

  by perforating the foam, e.g. to open the cells · CPC title

• B01D2239/10

  Filtering material manufacturing · CPC title

• E21B43/08

  Screens or liners {(expandable screens or liners E21B43/108)} · CPC title

• E21B43/02

  Subsoil filtering · CPC title

• B01D53/00

  Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols, (recovery of volatile solvents by condensation B01D5/00; sublimation B01D7/00; cold traps, cold baffles B01D8/00; working-up undefined gaseous mixtures obtained by cracking hydrocarbon oils C10G70/00; cleaning coal gas C10K; working-up of natural gas, or synthetic natural gas, C10L3/10; separation of difficult-to-condense gases or air by liquefaction F25J; for investigating materials G01N30/00) · CPC title