WO2001039861A1 - Procede de fabrication de tamis, tamis et systeme de fabrication de tamis - Google Patents

Procede de fabrication de tamis, tamis et systeme de fabrication de tamis Download PDF

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Publication number
WO2001039861A1
WO2001039861A1 PCT/GB2000/004615 GB0004615W WO0139861A1 WO 2001039861 A1 WO2001039861 A1 WO 2001039861A1 GB 0004615 W GB0004615 W GB 0004615W WO 0139861 A1 WO0139861 A1 WO 0139861A1
Authority
WO
WIPO (PCT)
Prior art keywords
roller
glue
screen
layers
screening material
Prior art date
Application number
PCT/GB2000/004615
Other languages
English (en)
Inventor
Charles Newton Grichar
Kenneth Wayne Seyffert
Thomas Cole Adams
David Wayne Largent
David Lee Schulte
Jeffery Earl Walker
Guy Lamont Mcclung, Iii
Vincent Dominick Leone
Original Assignee
Varco I/P, Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Varco I/P, Inc filed Critical Varco I/P, Inc
Priority to EP00981470A priority Critical patent/EP1242158A1/fr
Priority to AU18707/01A priority patent/AU1870701A/en
Priority to CA002382705A priority patent/CA2382705A1/fr
Publication of WO2001039861A1 publication Critical patent/WO2001039861A1/fr
Priority to NO20022119A priority patent/NO20022119D0/no

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4618—Manufacturing of screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/012—Making filtering elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/01—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements
    • B01D29/05—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with flat filtering elements supported
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/62—Regenerating the filter material in the filter
    • B01D29/70—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D29/72—Regenerating the filter material in the filter by forces created by movement of the filter element involving vibrations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00—Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46—Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609—Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4663—Multi-layer screening surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07B—SEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00—Details applicable to machines for screening using sieves or gratings
    • B07B2201/02—Fastening means for fastening screens to their frames which do not stretch or sag the screening surfaces

Definitions

  • Drilling mud typically a mixture of clay, water and various additives
  • Drilling mud is pumped down through a hollow drill string (pipe, drill collar, bit, etc.) into a well being drilled and exits through holes in the drill bit.
  • the mud picks up cuttings (rock) and other solids from the well and carries them upwardly away from the bit and out of the well in a space between the well walls and the drill string.
  • the solids-laden mud is discharged over a shale shaker, a device which typically has a series of screens arranged in tiered or flat disposition with respect to each other.
  • a vibrating screen may be formed from one or more layers of wire mesh.
  • Wire mesh is generally described with reference to the diameter of the wires from which it is woven, the number wires per unit length (called the mesh count) and the shape or size of the openings between wires .
  • Wire mesh comes in various grades . "Market” grade mesh generally has wires of relative large diameter. "Mill” grade has comparatively smaller diameter wires and “bolting cloth” has the smallest diameter wire. The type of mesh chosen depends on the application. Smaller diameter wires have less surface and thus less drag, resulting in greater flow rates. Smaller diameter wires also result, for a given opening size, in a larger percentage of open area over the total area of the screen, thus allowing greater flow rates and increased capacity.
  • screens of bolting cloth tear more easily than market or mill grade screens, especially when used in harsh conditions such as drilling and mining operations .
  • the smaller diameter wires tend to have less tensile strength and break more easily, and the finer mesh also tends not to retain its shape well .
  • Most meshes suffer from what is termed “near sized particle blinding".
  • wires separate enough to allow particles of substantially the same size or slightly larger than the openings to fall between the wires and become lodged, thus “blinding" the openings of the screen and reducing capacity of the screen . If a particle becomes lodged when the wires are at their maximum distance apart, it is almost impossible to dislodge the particle. Sometimes, however, wires will subsequently separate further to release the lodged particle.
  • 4,033,865 describes layering two meshes in a manner that results in at least one wire of the lower of the two meshes bisecting each opening in the upper mesh.
  • the openings in each mesh are at least twice as wide as the diameters of the wires and the lower mesh has openings the same size as or slightly larger than the openings in the upper mesh.
  • the lower mesh when held tightly against the upper mesh, prevents particles from migrating far enough into an opening in the upper mesh to be trapped. Some relative movement of the layers also helps to dislodge particles caught in the upper layer.
  • the two-layer arrangement has the further benefit of a finer "cutting point," allowing smaller particles to be separated out.
  • a third "backing" layer of relatively coarse, mill grade mesh is often used to carry most of the load on the screen and to increase the tensile strength of the screen.
  • a torn screen must be replaced or repaired.
  • the screen layers are bonded to a rigid or semi-rigid support panel that has a pattern of large openings , forming on the screen a plurality of small cells of wire mesh.
  • the mesh remaining within the cell in which the tear occurred is cut out and the cell is plugged.
  • the capacity of the screen is diminished but its life is extended.
  • several cells of a screen can be repaired before its capacity drops far enough to require replacement.
  • bonding the screen to the support panel further restricts relative movement of the layers and the wires in each mesh layer, thus compounding the problem of blinding .
  • the present invention provides a method for making a screen assembly for a vibratory separator, the method comprising the steps of placing at least two layers of screening material one on top of the other, introducing glue to one of the at least two layers of screening material for adhering at least portions of them together, said glue introduced to one of the at least two layers of screening material from a roller with a patterned surface thereon such that the amount of glue is introduced to the at least two layers of screening material in a pattern substantially corresponding to said patterned surface of the roller.
  • the invention also relates to a screen made by the method and to a system for making a screen in accordance with the method.
  • the invention also relates to a screen made by the above method and to a system for making a screen in accordance with the method.
  • Figure 1 is a side schematic view of a first embodiment of an apparatus for making screens in accordance with the present invention, indicating steps in a method of making screens in accordance the present invention ;
  • FIG 3 is an enlarged side view of an alternative roller apparatus for use in the apparatus as shown in Figures 1 or 2 ;
  • Figure 4A is an enlarged front view of part of a pattern roller for apparatus as in Figure 1 ;
  • Figure 5B is a side view of the roller of Figure 5A;
  • Figure 6A is an end view of a second embodiment of pattern roller ;
  • Figure 6B is a side view of the roller of Figure 6A;
  • Figures 7 and 8 are side views of alternative pattern rollers ;
  • Figure 9 is a top view of a screen in accordance with the present invention.
  • Figure 10 is a top view of a screen in accordance with the present invention with parts cut-away; and
  • FIG. 1 shows a system 100 according to the present invention for making a screen 2 according to the present invention by a method according to the present invention .
  • the system 100 produces a screen 2 which includes a lower coarse mesh or screen 4 , an intermediate mesh or screen 6 , and a top mesh or screen 8. Any one of these meshes (or screens) 4, 6, 8 may be omitted. Alternatively one or more additional mesh layers may be added.
  • the coarse mesh 4 is initially wound on a roller 11 from which it is unwound and passes over a rotating roller 13. From the roller 13 the coarse mesh moves to a position beneath a gluing station 20 where glue in a pattern is applied on the coarse mesh 4.
  • the coarse mesh is 19 mesh made of wire with a diameter of about 0.32cm (0.126 inches) .
  • a pattern roller 30 applies a layer of glue in a desired pattern onto the coarse mesh 4.
  • Glue 40 from a reservoir/manifold 50 flows to a space forming a "pond" of glue between a first roller 15 and a transfer roller 17. Either or both of these rollers may be a heated roller.
  • hot air from an optional heater H may be blown at the roller (s) and/or at the "pond", and/or it may heat the glue in the reservoir/manifold 50.
  • the transfer roller 17 rotates counter-clockwise as viewed in Figure 1 and the first roller 15 rotates clockwise; thus a film of glue is deposited on the outer surface of the transfer roller 17 which film, in turn, contacts parts of a pattern in or on an outer surface of the pattern roller 30 which rotates clockwise as viewed in Figure 1.
  • the film on the pattern parts of the pattern roller 30 is applied in the pattern onto the coarse mesh 4 moving beneath the pattern roller 30.
  • glue is applied on top of a combination of two , three , or more meshes prior to entering between the rollers 61 (rather than on top of the coarse mesh when it comes off the roll 11) .
  • the glue is applied only to the mesh from either the roll 9 or the roll 7.
  • the coarse mesh 4 with glue thereon in a desired pattern determined by the pattern on the pattern roller 30 advances to a pressing station 60.
  • the intermediate mesh 6 is fed between rollers 61 and 62 of the pressing station 60 from a roll 7 as is the top mesh 8 from a roll 9.
  • a fine mesh is unwound from the roll 111 and fine, finer, or coarse mesh or meshes are unwound from the rolls 107 and 109.
  • the glue 40, 140 may be any suitable glue, including, but not limited to, polyethylene glues and hot melt glues at a suitable temperature for flowing to and from a reservoir/manifold and onto a mesh, for example, but not limited to at about 121°C (250°F) , between 121°C (250°F) and 204°C (400°F) , or at other suitable temperatures for the particular glue being used.
  • Figures 5A and 5B show a pattern roller 80 useful as the pattern roller 30 of the system 100 in Figure 1. Raised portions 81 on an exterior surface 82 of the pattern roller 80 form the desired pattern for applying glue to a mesh.
  • the roller 80 is solid with end shafts 83 for mounting to suitable supports for rotation.
  • Figures 7 and 8 present pattern rollers with patterns or raised portions different from that of the patterns of the rollers of Figures 5B and 6B .
  • the rollers of Figures 7 and 8 may have any of the options of the rollers of Figures 5B and 6B (including, but not limited to end shafts 83 and bore 84 , or a perforated tube structure) .
  • a roller 85 in Figure 7 has raised lines 86 that define a pattern across the roller.
  • a roller 87 in Figure 8 has raised portions 88 and 89 that define a pattern across the roller.
  • Figure 9 shows a screen 90 produced with a system like the system 100 of Figure 1, using a roller like the roller 85 of Figure 7.
  • Figure 10 shows a screen 92 with a glue layer 93 according to the present invention produced with a system like the system 100 of Figure 1 using a roller like the roller 87 of Figure 8.
  • the screen 92 is like the screens disclosed in U.S. Patent 4,575,421 (incorporated fully herein for all purposes), but made with a system according to the present invention and by a method according to the present invention.
  • the screen 92 has three layers of mesh or screening material 56, 57 and 58 and a lower perforated plate 54. Any of the layers of mesh may be omitted and the glue 93 may be applied on top of any of the layers .
  • Figure 4A shows an enlargement of part of a pattern roller 96 which is similar to the roller 80 of Figure 5B, but which has valleys, recesses or grooves 97 in raised portions 98 of the roller. Glue is received within the grooves 97 so that a relatively higher or thicker level or bead of glue is applied to a mesh by the roller as compared to the layer or film of glue applied by a roller like the roller 80. Any raised portion of any roller disclosed herein may include such a valley recess, or groove to increase the amount of glue applied on a mesh.
  • FIG. 4B shows a cross-section of one glue bead's B profile applied to a screen S with a pattern roller having grooves in raised portions of the pattern.
  • the distance "a” is, in this embodiment, about 0.16cm (one-sixteenth of an inch) .
  • the distance "b" is as thin as possible.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un procédé de fabrication d'un assemblage de tamis, destiné à un séparateur vibrant, qui consiste à placer deux toiles de tamis l'une sur l'autre, à introduire de la colle sur une des deux toiles de tamis afin de faire adhérer au moins des parties de ces toiles ensemble, la colle étant étendue à partir d'un rouleau comportant une surface à motif telle que la quantité de colle soit introduite, sur au moins une des deux toiles de tamis, selon un motif correspondant sensiblement au motif du rouleau. L'invention concerne aussi un procédé de fabrication d'un tamis qui consiste à injecter de la colle sur une première toile de tamis selon un motif prédéterminé, à presser au moins une seconde toile de tamis sur la première afin de former un tamis à couches multiples. Elle concerne aussi un tamis fabriqué selon les procédés, ainsi que les systèmes de fabrication d'un tamis selon les procédé.
PCT/GB2000/004615 1999-12-04 2000-12-04 Procede de fabrication de tamis, tamis et systeme de fabrication de tamis WO2001039861A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP00981470A EP1242158A1 (fr) 1999-12-04 2000-12-04 Procede de fabrication de tamis, tamis et systeme de fabrication de tamis
AU18707/01A AU1870701A (en) 1999-12-04 2000-12-04 A method of making a screen, a screen, and a system for making a screen
CA002382705A CA2382705A1 (fr) 1999-12-04 2000-12-04 Procede de fabrication de tamis, tamis et systeme de fabrication de tamis
NO20022119A NO20022119D0 (no) 1999-12-04 2002-05-03 Fremgangsmåte for å lage en sikt, en sikt og et system for å lage en sikt

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US45472299A 1999-12-04 1999-12-04
US09/454,722 1999-12-04

Publications (1)

Publication Number Publication Date
WO2001039861A1 true WO2001039861A1 (fr) 2001-06-07

Family

ID=23805804

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/004615 WO2001039861A1 (fr) 1999-12-04 2000-12-04 Procede de fabrication de tamis, tamis et systeme de fabrication de tamis

Country Status (5)

Country Link
EP (1) EP1242158A1 (fr)
AU (1) AU1870701A (fr)
CA (1) CA2382705A1 (fr)
NO (1) NO20022119D0 (fr)
WO (1) WO2001039861A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003033102A1 (fr) * 2001-10-19 2003-04-24 Varco I/P, Inc. Procede de fabrication d'un crible pour separateur vibrant, crible et appareil de fabrication d'un tel crible
WO2003061856A1 (fr) * 2002-01-16 2003-07-31 Varco I/P, Inc. Ensemble et procede de criblage
WO2003072344A1 (fr) * 2002-02-26 2003-09-04 Sca Hygiene Products Ab Procede et dispositif de production d'un materiau flexible d'une bande multiplis comme du papier et un non tisse ainsi que materiau multiplis et produit produits selon ce procede
WO2003072345A1 (fr) * 2002-02-26 2003-09-04 Sca Hygiene Products Ab Procede et dispositif pour produire une bande multicouche de matiere souple, telle que du papier ou du non-tisse, et matiere multicouche produite par ce procede
WO2004011160A1 (fr) * 2002-07-31 2004-02-05 Varco I/P, Inc. Procede de realisation de tamis pour crible vibrant
WO2004022252A1 (fr) * 2002-09-05 2004-03-18 Varco I/P, Inc. Procede de fabrication d'un ensemble de criblage pour un separateur a vibrations
WO2004056560A1 (fr) * 2002-12-19 2004-07-08 Sca Hygiene Products Ab Procede et dispositif de production d'une toile imprimee multicouche en materiau flexible, tel que papier et non tisse, et materiau multicouche produit par ce procede
WO2005014187A2 (fr) 2003-07-25 2005-02-17 Varco I/P, Inc. Appareil et procede de production d'ensembles de tamis pour separateurs par vibration
US7153385B2 (en) 2002-12-19 2006-12-26 Sca Hygiene Products Ab Method and device for producing a multi-ply printed web of flexible material, such as paper and nonwoven, and multi-ply material produced by the method

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575421A (en) * 1984-03-08 1986-03-11 Derrick Manufacturing Corporation Non-clogging wear-reducing screen assembly for vibrating screening machine
WO1995017942A2 (fr) * 1993-12-30 1995-07-06 Detroit Holding Limited Procede de fabrication d'un filtre a fluides
GB2312858A (en) * 1996-05-10 1997-11-12 William Myron Cravello Shaker screen assembly
US5858091A (en) * 1995-09-04 1999-01-12 Windmoller & Holscher Device for applying adhesives

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4575421A (en) * 1984-03-08 1986-03-11 Derrick Manufacturing Corporation Non-clogging wear-reducing screen assembly for vibrating screening machine
WO1995017942A2 (fr) * 1993-12-30 1995-07-06 Detroit Holding Limited Procede de fabrication d'un filtre a fluides
US5858091A (en) * 1995-09-04 1999-01-12 Windmoller & Holscher Device for applying adhesives
GB2312858A (en) * 1996-05-10 1997-11-12 William Myron Cravello Shaker screen assembly

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7000777B2 (en) 1998-10-30 2006-02-21 Varco I/P, Inc. Vibratory separator screens
WO2003033102A1 (fr) * 2001-10-19 2003-04-24 Varco I/P, Inc. Procede de fabrication d'un crible pour separateur vibrant, crible et appareil de fabrication d'un tel crible
WO2003061856A1 (fr) * 2002-01-16 2003-07-31 Varco I/P, Inc. Ensemble et procede de criblage
GB2399042B (en) * 2002-01-16 2006-11-29 Varco Int Screen assembly and method for screening
GB2399042A (en) * 2002-01-16 2004-09-08 Varco Int Screen assembly and method for screening
WO2003072344A1 (fr) * 2002-02-26 2003-09-04 Sca Hygiene Products Ab Procede et dispositif de production d'un materiau flexible d'une bande multiplis comme du papier et un non tisse ainsi que materiau multiplis et produit produits selon ce procede
WO2003072345A1 (fr) * 2002-02-26 2003-09-04 Sca Hygiene Products Ab Procede et dispositif pour produire une bande multicouche de matiere souple, telle que du papier ou du non-tisse, et matiere multicouche produite par ce procede
CN100351073C (zh) * 2002-02-26 2007-11-28 Sca卫生产品股份公司 多层软材料匹、如纸和无纺材料的制造方法和装置及由该方法制造的多层材料
GB2407052A (en) * 2002-07-31 2005-04-20 Varco Int Method for making a screen for a vibratory separator
GB2407052B (en) * 2002-07-31 2005-08-10 Varco Int Method for making a screen for a vibratory separator
WO2004011160A1 (fr) * 2002-07-31 2004-02-05 Varco I/P, Inc. Procede de realisation de tamis pour crible vibrant
WO2004022252A1 (fr) * 2002-09-05 2004-03-18 Varco I/P, Inc. Procede de fabrication d'un ensemble de criblage pour un separateur a vibrations
WO2004056560A1 (fr) * 2002-12-19 2004-07-08 Sca Hygiene Products Ab Procede et dispositif de production d'une toile imprimee multicouche en materiau flexible, tel que papier et non tisse, et materiau multicouche produit par ce procede
US7153385B2 (en) 2002-12-19 2006-12-26 Sca Hygiene Products Ab Method and device for producing a multi-ply printed web of flexible material, such as paper and nonwoven, and multi-ply material produced by the method
WO2005014187A2 (fr) 2003-07-25 2005-02-17 Varco I/P, Inc. Appareil et procede de production d'ensembles de tamis pour separateurs par vibration

Also Published As

Publication number Publication date
NO20022119L (no) 2002-05-03
CA2382705A1 (fr) 2001-06-07
NO20022119D0 (no) 2002-05-03
EP1242158A1 (fr) 2002-09-25
AU1870701A (en) 2001-06-12

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