US3879243A - Porous filament wound pipe and method for making same - Google Patents
Porous filament wound pipe and method for making same Download PDFInfo
- Publication number
- US3879243A US3879243A US321205A US32120573A US3879243A US 3879243 A US3879243 A US 3879243A US 321205 A US321205 A US 321205A US 32120573 A US32120573 A US 32120573A US 3879243 A US3879243 A US 3879243A
- Authority
- US
- United States
- Prior art keywords
- matrix material
- resin
- winding
- pipe
- matrix
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/56—Winding and joining, e.g. winding spirally
- B29C53/58—Winding and joining, e.g. winding spirally helically
- B29C53/583—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features
- B29C53/587—Winding and joining, e.g. winding spirally helically for making tubular articles with particular features having a non-uniform wall-structure, e.g. with inserts, perforations, locally concentrated reinforcements
Definitions
- ABSTRACT An improved resin bonded, wound filament pipe is disclosed having a wall with a precisely determined and accurately controlled porosity.
- the method for forming the pipe includes building up the wall thereof with a combination of a resin bonded fibers and a removable matrix material.
- the matrix material is removed such as by the application of heat, a solvent, the application of a vacuum etc. depending upon different considerations, for example the type of material used for the matrix.
- One presently used method for winding the screen described above is to use a wire of trapezoidal cross section for forming openings that are smaller on the outside diameter of the pipe and larger on the inside diameter of the pipe.
- the purpose of this type of con struction is to trap the larger sand particles on the outside diameter of the pipe so that the sand particles cannot get into the openings and thereby clog the screen.
- a wire wound screen such as is commonly used in the prior art is extremely expensive to produce and costs approximately $65.00 per foot in stainless steel for a 6 inch screen.
- the wall of the pipe is thereby weakened by the quantity of material that is taken out of the pipe.
- the slotting technique has an additional detrimental effect in that individual strands ofthe pipe that are wound continuously are thereby cut so that even in those areas where material is not removed the pipe is weakened because the cuts have been provided adjacent the solid areas and failure may occur under load.
- slot cutting ofthe pipe cuts down on the crush and tensile strength of the pipe. In addition, whatever material is removed at the slots is thereby wasted.
- Another method that is used in well production is to dig a hole larger than the outside diameter of the pipe.
- an annular dimension of at least three inches is provided around the screen and, after the holes are drilled and the screen and casing are set, gravel is packed in the annular opening in order to insure that fine material is trapped in the gravel.
- the gravel pack consists of granules that are large enough not to enter the openings in the screen.
- a drawback to the gravel packing technique is that the gravel must frequently be shipped over large distances and escessive costs are incurred in packing the gravel into the wells. It should be noted that unless the gravel packing of the well is done absolutely perfectly there is always the possibility of collapsing the well due to the weight of the gravel.
- the permeability will progressively increase away from the paper with the glass fiber structure having the greatest permeability, the paper having an intermediate permeability and a thin layer of a reverse-osmosis membrane having a small and selective permeability allowing only for purified water and the like to pass therethrough.
- the end product consists of a multi-layer, multicomposition wall.
- the present invention provides a pipe having a porous, monolithic wall.
- Layers of resin bonded glass fibers are wound, for example, in a helical pattern on a mandrel together with a matrix material that is removable by any convenient means such as the application of heat, a solvent or a vacuum.
- the matrix material may be formed of polyvinyl alcohol or the like.
- appropriate means such as the application of heat or a solvent are used, depending upon the composition of the matrix material for the removal of the matrix material.
- the resulting structure is a pipe having a wall whose porosity is determined by the volume of the matrix material that is initially applied and which is subsequently removed.
- the matrix material may either be in granular form or may be a plurality of filaments or a slit film. All of the foregoing materials may be included in the mixture of filamentary winding material as the pipe is made.
- the matrix material keeps its form and shape while the resin gels but may subsequently be removed by heating to a high temperature or by washing out with water or some other appropriate solvent solution or by the application of suction at the appropriate time.
- Some examples of granular materials that could be included in the manufacture of the pipe comprising the present invention and which can subsequently be removed from the pipe wall in order to form voids are salt, wax beads, polyvinyl alcohol granules, carboxymethyl cellulose or other soluble cellulose materials.
- thread, twine, strips of polyvinyl alcohol, carboxymethyl cellulose, wax etc. could be used for winding and could be subsequently removed from the finished product either be melting or dissolving the material out.
- Combinations of the foregoing material may be used in order to form a tube or pipe with a known void content and path so that the porosity may be accurately controlled with respect to both the size of the opening and the degree of porostiy.
- the bandwidth of the filamentary material and the matrix material may be varied as the winding head passes over the mandrel.
- a wider mesh may be provided on the inside diameter of the pipe with a finer mesh on the outside diameter of the pipe so as to selectively filter out different size particles.
- different bandwidths of matrix strips may be used in order to vary and control the size of the openings in a radial direction with respect to the longitudinal axis of the pipe.
- a particular object of the present invention is to pro vide a method for forming a porous walled pipe wherein a matrix material is applied to the mandrel in addition to the filamentary material and the matrix material is subsequently removed after the resin used to bond the filamentary material has cured.
- FIG. 1 is a schematic diagram illustrating several steps comprising the method of the present invention
- FIG. 2 is a perspective view schematically illustrating one embodiment of the method of operation of the present invention
- FIG. 3 and FIG. 4 are fragmentary, schematic sectional side and end views, respectively, illustrating the formation of a porous tube in accordance with the method of the present invention.
- FIG. 5 is another schematic view illustrating an alternative mode of the method comprising the present invention.
- FIG. 1 there is shown a schematic diagram illustrating the several steps comprising the method of this invention.
- a filamentary material such as glass fibers or the like is wound about a mandrel.
- the filamentary material may be preimpregnated with a suitable resin or the resin may be applied after the filamentary material is wound about the mandrel.
- a removable matrix such as fibers of polyvinyl alcohol or the like are also wound about the mandrel.
- step b also encompasses the application of soluble granules such as described hereinabove.
- the resin is cured (step c) by any suitable means well known in the art.
- means are provided for removing the matrix material as shown by step d.
- the means for re moving the matrix material may be the application of an elevated temperature, the application of a suitable solvent and/or the application of a vacuum.
- the bandwidth of the filamentary material and the matrix material may, as an alternative feature, be altered by changing the winding angle during the winding process so as to provide variable size openings in the wall of the pipe, for example, openings that increase from the outside diameter to the inside diameter of the pipe.
- FIG. 2 there is shown a mandrel 10 that is adapted to be rotated about the longitudinal axis thereof by conventional drive means such as a motor, a gear train etc., (not shown).
- a source 12 of filamentary material is arranged to apply bundles of filaments 14 to the mandrel 10 through a feed eye 16. Apparatus well known in the filament winding art may be used for this purpose. Typically, a bundle of glass fibers of about 0.0035 inch diameter may be used.
- a source 18 for the removable matrix material which, in this embodiment, is in the form of a plurality of filaments 20 that are fed, for purposes of illustration, through a second feed eye 22. Any one of the matrix materials hereinbefore described may be used.
- the filaments 14 may be passed through a resin bath 24 or the filaments 14 may be of the preimpregnated type which is also well known in the art.
- a resin material such as epoxy has been found to be satisfactory with a complete cure being achieved at 400F for l /2 hours.
- FIGS. 3 and 4 schematically illustrate a porous tube 30 that may be formed by the method of the present invention.
- the tube 30 includes a wall that is comprised of fiber bundles 12 defining a plurality of layers 34 of filamentary material 14.
- the layers 34 are also intially comprised of the removable filamentary matrix material 20.
- the filamentary matrix material 20 is removed, such as by any of the methods described hereinabove, there will be a plurality of intersecting voids through the wall 32.
- the voids are shown schematically in FIG. 3 and in FIG. 4 and are designated by the reference character 20a.
- a removable granular material 36 may be applied from a suitable source 38 as shown in FIG. 5. After the resin is cured the granular matrix material 36 may then be removed by any of the means previously described so as to result in a porous walled tube.
- a method for forming a well pipe having a porous wall that permits passage of a liquid therethrough comprising the steps of:
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
Description
Claims (8)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US321205A US3879243A (en) | 1973-01-05 | 1973-01-05 | Porous filament wound pipe and method for making same |
AU64233/74A AU487233B2 (en) | 1973-01-08 | 1974-01-07 | Dual function thermal valve |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US321205A US3879243A (en) | 1973-01-05 | 1973-01-05 | Porous filament wound pipe and method for making same |
Publications (1)
Publication Number | Publication Date |
---|---|
US3879243A true US3879243A (en) | 1975-04-22 |
Family
ID=23249639
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US321205A Expired - Lifetime US3879243A (en) | 1973-01-05 | 1973-01-05 | Porous filament wound pipe and method for making same |
Country Status (1)
Country | Link |
---|---|
US (1) | US3879243A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4105548A (en) * | 1977-02-22 | 1978-08-08 | E. I. Du Pont De Nemours And Company | Separation device of rigid porous inorganic hollow filament and use thereof |
US4740104A (en) * | 1980-12-31 | 1988-04-26 | Akzo N V | Underground irrigation or watering of soil |
EP0312167A2 (en) * | 1987-10-12 | 1989-04-19 | Dsm N.V. | Laminate structure |
EP0824956A2 (en) * | 1996-08-21 | 1998-02-25 | ESSEF Corporation | Filament wound housing for a reverse osmosis filter cartridge |
WO1998036975A3 (en) * | 1997-02-10 | 1998-12-10 | Universal Propulsion Co | Case for combustible materials and methods for making and using the same |
USH1779H (en) * | 1996-06-30 | 1999-02-02 | The United States Of America As Represented By The Secretary Of The Navy | Process and material for warhead casings |
US20080264854A1 (en) * | 2005-03-04 | 2008-10-30 | Pall Corporation | Corrugated Fluid Treatment Packs and Methods of Making Them |
US20120021165A1 (en) * | 2010-02-04 | 2012-01-26 | Bell Hellicopter Textron Unc. | Composite Core and Method of Making Same |
WO2017053388A1 (en) * | 2015-09-21 | 2017-03-30 | Exotex, Inc. | Thermally insulating pipes |
US20180045341A1 (en) * | 2015-02-23 | 2018-02-15 | Exotex, Inc. | Method and Apparatus of Making Porous Pipes and Panels Using a Treated Fiber Thread to Weave, Braid or Spin Products |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3293095A (en) * | 1962-10-10 | 1966-12-20 | Formica Corp | Method of producing oil absorptive laminates |
US3457170A (en) * | 1966-04-14 | 1969-07-22 | Havens Intern | Solvent separation process and apparatus |
US3473985A (en) * | 1964-08-28 | 1969-10-21 | Us Navy | Porous plastic |
US3601159A (en) * | 1968-02-07 | 1971-08-24 | Us Interior | Tubular membrane and membrane support manufacturing process |
US3671375A (en) * | 1969-02-26 | 1972-06-20 | Uniroyal Inc | Leather-like three layer laminate |
-
1973
- 1973-01-05 US US321205A patent/US3879243A/en not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3293095A (en) * | 1962-10-10 | 1966-12-20 | Formica Corp | Method of producing oil absorptive laminates |
US3473985A (en) * | 1964-08-28 | 1969-10-21 | Us Navy | Porous plastic |
US3457170A (en) * | 1966-04-14 | 1969-07-22 | Havens Intern | Solvent separation process and apparatus |
US3601159A (en) * | 1968-02-07 | 1971-08-24 | Us Interior | Tubular membrane and membrane support manufacturing process |
US3671375A (en) * | 1969-02-26 | 1972-06-20 | Uniroyal Inc | Leather-like three layer laminate |
Cited By (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4105548A (en) * | 1977-02-22 | 1978-08-08 | E. I. Du Pont De Nemours And Company | Separation device of rigid porous inorganic hollow filament and use thereof |
FR2381000A1 (en) * | 1977-02-22 | 1978-09-15 | Du Pont | DEVICE FOR SEPARATION CONSISTING OF HOLLOW FILAMENTS OF RIGID POROUS INORGANIC MATERIAL AND ITS USE |
US4740104A (en) * | 1980-12-31 | 1988-04-26 | Akzo N V | Underground irrigation or watering of soil |
EP0312167A2 (en) * | 1987-10-12 | 1989-04-19 | Dsm N.V. | Laminate structure |
EP0312167A3 (en) * | 1987-10-12 | 1992-07-01 | Dsm N.V. | Laminate structure |
US6038979A (en) * | 1996-06-30 | 2000-03-21 | The United States Of America As Represented By The Secretary Of The Navy | Insensitive warhead casings |
USH1779H (en) * | 1996-06-30 | 1999-02-02 | The United States Of America As Represented By The Secretary Of The Navy | Process and material for warhead casings |
EP0824956A2 (en) * | 1996-08-21 | 1998-02-25 | ESSEF Corporation | Filament wound housing for a reverse osmosis filter cartridge |
EP0824956A3 (en) * | 1996-08-21 | 1998-08-19 | ESSEF Corporation | Filament wound housing for a reverse osmosis filter cartridge |
US5866001A (en) * | 1996-08-21 | 1999-02-02 | Essef Corporation | Filament wound housing for a reverse osmosis filter cartridge |
US5976293A (en) * | 1997-02-10 | 1999-11-02 | Universal Propulsion Company, Inc. | Method for making a case for combustible materials |
WO1998036975A3 (en) * | 1997-02-10 | 1998-12-10 | Universal Propulsion Co | Case for combustible materials and methods for making and using the same |
US20080264854A1 (en) * | 2005-03-04 | 2008-10-30 | Pall Corporation | Corrugated Fluid Treatment Packs and Methods of Making Them |
US8236210B2 (en) | 2005-03-04 | 2012-08-07 | Pall Corporation | Corrugated fluid treatment packs and methods of making them |
US20120021165A1 (en) * | 2010-02-04 | 2012-01-26 | Bell Hellicopter Textron Unc. | Composite Core and Method of Making Same |
US9713913B2 (en) * | 2010-02-04 | 2017-07-25 | Textron Innovations Inc. | Composite core and method of making same |
US20180045341A1 (en) * | 2015-02-23 | 2018-02-15 | Exotex, Inc. | Method and Apparatus of Making Porous Pipes and Panels Using a Treated Fiber Thread to Weave, Braid or Spin Products |
US11754205B2 (en) | 2015-02-23 | 2023-09-12 | Exotex, Inc. | Method and apparatus of making pipes and panels using a treated fiber thread to weave, braid or spin products |
WO2017053388A1 (en) * | 2015-09-21 | 2017-03-30 | Exotex, Inc. | Thermally insulating pipes |
US11913592B2 (en) | 2015-09-21 | 2024-02-27 | Exotex, Inc. | Thermally insulating pipes |
Also Published As
Publication number | Publication date |
---|---|
AU6423374A (en) | 1975-07-10 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE2701167C2 (en) | Process for the production of a seamless, tubular filter element and seamless, tubular filter element | |
US3879243A (en) | Porous filament wound pipe and method for making same | |
KR930000401B1 (en) | Storage tanks with fabricated support ribs | |
FI59430C (en) | CONTAINER CONTAINING FRAMEWORK FRAMEWORK | |
US4032688A (en) | Seamless tubular nonwoven webs and filters thereof | |
US4512836A (en) | Method of producing composite structural members | |
US3457170A (en) | Solvent separation process and apparatus | |
CN102741045B (en) | Composite core material and preparation method thereof | |
US4021281A (en) | Continuous production of nonwoven tubular webs from thermoplastic fibers and products | |
JPS58122013A (en) | Corrugated cylindrical filter with spiral tape outside support | |
US4415613A (en) | Method for making strengthened porous pipe and resulting product | |
US3601159A (en) | Tubular membrane and membrane support manufacturing process | |
US3623930A (en) | Composite reinforced plastic pipe | |
JPH0133206B2 (en) | ||
JPH049816B2 (en) | ||
US3700527A (en) | Transverse filament reinforcing tape and methods and apparatus for the production thereof | |
US3399092A (en) | Process of making impregnated filter tubes | |
US4220489A (en) | Method of fabricating a hollow filament separator module | |
DE69935432T2 (en) | FILTER ELEMENT AND METHOD FOR THE PRODUCTION THEREOF | |
DE2749478C3 (en) | Explosives detonating cord as well as method and device for their manufacture and their use | |
US3111442A (en) | Method and apparatus for providing temperature and ablation resistant structures | |
US3676246A (en) | Method for longitudinal reinforcing plastic pipes | |
EP1565255B1 (en) | Method for the continuous production of tubular composite membranes | |
DE2042073C3 (en) | Fiber-reinforced, flexible sandwich plastic pipe and process for its production | |
US10532323B2 (en) | Hollow-fiber membrane device and method for the production thereof |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIBERGLASS RESOURCES CORPORATION, 222 SHERWOOD AVE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MEDNEY, JONAS;REEL/FRAME:004164/0354 Effective date: 19830728 Owner name: KOCH ENGIEERING COMPANY, INC., 4111 EAST 37TH ST., Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:FIBERGLASS RESOURCES CORPORATION;REEL/FRAME:004154/0265 Effective date: 19830728 |
|
AS | Assignment |
Owner name: SMITH FIBERGLASS PRODUCTS INC., 2700 W. 65TH STREE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:KOCH ENGINEERING COMPANY, INC.,;REEL/FRAME:004833/0983 Effective date: 19871231 Owner name: SMITH FIBERGLASS PRODUCTS INC., A DE. CORP.,ARKA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KOCH ENGINEERING COMPANY, INC.,;REEL/FRAME:004833/0983 Effective date: 19871231 |