Glued screens for shale shakers

• US 20020130064A1
• Filed: 02/19/2002
• Published: 09/19/2002
• Est. Priority Date: 10/30/1998
• Status: Active Grant

• Current Assignee: Varco I/P Incorporated (NOV, Inc.)
• Original Assignee: Varco I/P Incorporated (NOV, Inc.)
• Inventors: Walker, Jeffrey E., McClung, Guy L. III, Grichar, Charles N., Ward, Kerry, Seyffert, Kenneth W., Schulte, David L. Jr., Adams, Thomas C., Leone, Vincent D., Largent, David W.
• Granted Patent: US 6,736,270 B2
• Time in Patent Office: Days
• US Class Current: 209/399
• CPC Class Codes: B01D 2201/188 Multiple filtering elements having filtering areas of different size
• CPC Class Codes: B01D 2201/52 Filter identification means
• CPC Class Codes: B01D 29/012 Making filtering elements making bag, cage, hose, tube, sleeve or like filtering elements B01D29/111
• CPC Class Codes: B01D 29/05 supported
• CPC Class Codes: B01D 29/07 with corrugated, folded or wound filtering sheets
• CPC Class Codes: B01D 29/445 Bar screens
• CPC Class Codes: B01D 29/52 in parallel connection
• CPC Class Codes: B01D 29/72 involving vibrations
• CPC Class Codes: B01D 33/0183 supported
• CPC Class Codes: B01D 33/0376 supported
• CPC Class Codes: B01D 33/0384 with corrugated, folded or wound filtering sheets
• CPC Class Codes: B07B 1/00 Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like ash-sifters for domestic stoves or ranges F24B15/007
• CPC Class Codes: B07B 1/46 Constructional details of screens in general; Cleaning or heating of screens
• CPC Class Codes: B07B 1/4618 Manufacturing of screening surfaces
• CPC Class Codes: B07B 1/4627 Repairing of screening surfaces
• CPC Class Codes: B07B 1/4645 Screening surfaces built up of modular elements
• CPC Class Codes: B07B 1/4654 Corrugated Screening surfaces
• CPC Class Codes: B07B 1/4663 Multi-layer screening surfaces
• CPC Class Codes: B07B 1/4672 Woven meshes
• CPC Class Codes: B07B 1/469 Perforated sheet-like material
• CPC Class Codes: B07B 1/48 : Stretching devices for screens
• CPC Class Codes: B07B 1/49 : stretching more than one screen or screen section by the same or different stretching means
• CPC Class Codes: B07B 2201/02 : Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces
• CPC Class Codes: B07B 2201/04 : Multiple deck screening devices comprising one or more superimposed screens
• CPC Class Codes: B21F 27/005 : Wire network per se
• CPC Class Codes: B32B 2305/38 : Meshes, lattices or nets
• CPC Class Codes: B32B 37/1292 : selectively, e.g. in stripes, in patterns B32B37/0076 takes precedence
• CPC Class Codes: C07D 471/06 : Peri-condensed systems
• CPC Class Codes: E21B 21/06 : Arrangements for treating drilling fluids outside the borehole
• CPC Class Codes: E21B 21/065 : Separating solids from drilling fluids
• CPC Class Codes: Y10T 156/1025 : to form undulated to corrugated sheet and securing to base with parts of shaped areas out of contact
• CPC Class Codes: Y10T 156/1056 : Perforating lamina

Abstract

Screens and screen assemblies for a vibratory separator or shale shaker, such screens and screen assemblies made by a method including applying glue in a glue pattern to at least one layer of screening material, said applying done by powered moving mechanical glue application apparatus; in one aspect moving with powered mechanical screen movement apparatus the at least one layer of screening material beneath the powered moving mechanical glue application apparatus; in one aspect, using hot melt moisture-curing glue, and in one aspect facilitating the cure of moisture-curing glue by applying moisture to it.

Claims

1. A screen assembly for a shale shaker, the screen assembly made by an automated method, the automated method comprising

applying glue in a glue pattern to at least one layer of screening material useful for screening fluid introduced to a shale shaker, said applying done by powered moving mechanical glue application means.

2. The screen assembly of claim 1 wherein the glue is heated moisture-curing hot melt glue.

3. The screen assembly of claim 2 wherein moisture is applied to glue in the glue pattern following application of the moisture-curing hot melt glue to the at least one layer of screening material.

4. The screen assembly of claim 1 wherein the automated method further comprising

moving with powered mechanical screen movement apparatus the at least one layer of screening material beneath the powered moving mechanical glue application means.

5. The screen assembly of claim 1 wherein the at least one layer of screening material is three layers of screening material.

6. The screen assembly of claim 1 wherein the powered moving mechanical glue application means includes a patterned roller having a glue pattern thereon for applying glue in said glue pattern to the at least one layer of screening material.

7. The screen assembly of claim 1 wherein the method includes moving at least one glue dispensing manifold with a plurality of spaced-apart glue dispensing nozzles above the at least one layer of screening material to apply the glue pattern.

8. The screen assembly of claim 1 wherein the method includes moving two spaced-apart glue dispensing manifolds each with a plurality of spaced-apart glue dispensing nozzles above the at least one layer of screening material to apply the glue pattern.

9. The screen assembly of claim 1 wherein the screen assembly is mounted on screen assembly support means.

10. The screen assembly of claim 9 wherein the screen assembly support means is from the group consisting of frame, strip support, perforated sheet metal, and perforated plate.

11. The screen assembly of claim 1 further comprising

hookstrip apparatus on each of two spaced-apart sides of the screen assembly.

13. The screen assembly of claim 12 wherein the glue application apparatus includes at least one glue nozzle secured immovably to a main body, the method further comprising

applying with the at least one glue nozzle secured immovably to the main body at least one shearable glue bead having a length to the screening material so that shearing the screening material along the length of the at least one shearable glue bead produces separate sections of the screening material.

14. The screen assembly of claim 13 wherein the at least one nozzle secured immovably to the main body is a plurality of spaced-apart glue nozzles, each for applying a separate shearable glue bead to the screening material, the method further comprising

applying a plurality of spaced-apart shearable glue beads to the screening material.

15. The screen assembly of claim 12 wherein the method further comprises continuously moving the at least one layer of screening material beneath the glue application apparatus.

16. The screen assembly of claim 12 wherein a rate of movement of the at least one layer of screening material beneath the glue application apparatus is between 5 feet per minute to 30 feet per minute.

17. The screen assembly of claim 12 wherein the glue is heated moisture-curing hot melt glue.

18. The screen assembly of claim 17 wherein the method further comprises applying moisture to the heated moisture-curing hot melt glue to facilitate curing of it.

19. The screen assembly of claim 12 wherein the method further comprises tensioning the at least one layer of screening material below the glue application apparatus.

20. The screen assembly of claim 12 wherein the method further comprises rolling the at least one layer of screening material in a roll following application of glue thereto.

21. The screen assembly of claim 20 wherein the method further comprises positioning separator material with respect to at least one layer of screening material to prevent undesired gluing together of screening material within the roll.

22. The screen assembly of claim 12 wherein the method further comprises combining at least one additional layer of screening material with the at least one layer of screening material.

23. The screen assembly of claim 22 wherein the at least one additional layer of screening material is combined with the at least one layer of screening material following application of glue to the at least one layer of screening material.

24. The screen assembly of claim 12 wherein the at least one layer of screening material is a layer of coarse mesh.

25. The screen assembly of claim 12 wherein the pattern includes a plurality of intersections of lines of glue.

26. The screen assembly of claim 12 wherein the method further comprises

corrugating the at least one layer of screening material.

27. The screen assembly of claim 26 wherein the method further comprises

corrugating the at least one layer of screening material.

28. The screen assembly of claim 12 wherein the glue application apparatus includes at least one glue nozzle secured immovably to a main body, the method further comprising

applying with the at least one glue nozzle secured immovably to the main body at least one shearable glue bead across a width of the screening material so that shearing the screening material along the length of the at least one shearable glue bead produces separate sections of the screening material.

29. The screen assembly of claim 28 wherein the at least one nozzle secured immovably to the main body is a plurality of spaced-apart glue nozzles, each for applying a separate shearable glue bead to the screening material, the method further comprising

applying a plurality of spaced-apart shearable glue beads to the screening material across the width thereof.

12. A screen assembly made by a method for making a screen assembly for a vibratory separator, the method comprising

moving with screen movement apparatus at least one layer of screening material below a glue application apparatus, the glue application apparatus including a main body and a plurality of movable glue nozzles movably connected to the main body,

moving the movable glue nozzles with nozzle movement apparatus above the at least one layer of screening material,

applying with the movable glue nozzles an amount of glue flowing from the glue nozzles in a pattern to at least a portion of the at least one layer of screening material, and

allowing the glue to cure.

30. A screen assembly made by a method for making a screen assembly for a vibratory separator, the method comprising

moving with screen movement apparatus at least one layer of screening material below a glue application apparatus, the glue application apparatus including a main body a plurality of movable glue nozzles movably connected to the body,

moving the movable glue nozzles with nozzle movement apparatus above the at least one layer of screening material,

applying with the movable glue nozzles an amount of glue flowing from the glue nozzles in a pattern to at least a portion of the at least one layer of screening material, and

allowing the glue to cure,

wherein the glue is heated moisture-curing hot melt glue, and

rolling the at least one layer of screening material in a roll following application of glue thereto.

31. Any invention disclosed herein.