GB2306894A - Wire mesh well filters - Google Patents
Wire mesh well filters Download PDFInfo
- Publication number
- GB2306894A GB2306894A GB9522662A GB9522662A GB2306894A GB 2306894 A GB2306894 A GB 2306894A GB 9522662 A GB9522662 A GB 9522662A GB 9522662 A GB9522662 A GB 9522662A GB 2306894 A GB2306894 A GB 2306894A
- Authority
- GB
- United Kingdom
- Prior art keywords
- layers
- filter
- mesh
- wire
- superimposed
- 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.)
- Granted
Links
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 229910000990 Ni alloy Inorganic materials 0.000 claims abstract description 8
- 238000005245 sintering Methods 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 229910000851 Alloy steel Inorganic materials 0.000 claims abstract description 6
- 239000010959 steel Substances 0.000 claims description 14
- 229910000831 Steel Inorganic materials 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 239000010935 stainless steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 5
- 230000032798 delamination Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 239000010964 304L stainless steel Substances 0.000 description 1
- 229910000619 316 stainless steel Inorganic materials 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/02—Subsoil filtering
- E21B43/08—Screens or liners
- E21B43/084—Screens comprising woven materials, e.g. mesh or cloth
-
- 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
- B01D29/11—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 bag, cage, hose, tube, sleeve or like filtering elements
- B01D29/111—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
- B01D29/50—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 multiple filtering elements, characterised by their mutual disposition
- B01D29/56—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 multiple filtering elements, characterised by their mutual disposition in series connection
- B01D29/58—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 multiple filtering elements, characterised by their mutual disposition in series connection arranged concentrically or coaxially
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/10—Filter screens essentially made of metal
- B01D39/12—Filter screens essentially made of metal of wire gauze; of knitted wire; of expanded metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D39/00—Filtering material for liquid or gaseous fluids
- B01D39/14—Other self-supporting filtering material ; Other filtering material
- B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
- B01D39/2027—Metallic material
- B01D39/2041—Metallic material the material being filamentary or fibrous
- B01D39/2044—Metallic material the material being filamentary or fibrous sintered or bonded by inorganic agents
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Textile Engineering (AREA)
- Filtering Materials (AREA)
Abstract
A deep well filter comprises a tubular assembly of at least two superposed wire mesh layers, the aperture size and wire diameter of any adjacent two layers both being different. Seven layers may be provided in which layers 1,7 are the same but differ from layers 2,4,6 which are the same and all layers differ from layers 3,5 which are the same or different. To make the filter, flat meshes of nickel or steel alloy may be passed though rollers to bond them, followed by sintering, forming into a tube and welding the edges. The meshes may heated in a reducing atmosphere before rolling or during sintering.
Description
DEEP WELL FILTERS
This invention relates to deep well filters.
Deep well filters are used to remove sand and other granular contaminants during downhole recovery of oil and gas from onshore and offshore reserves. Such filters generally form part of the overall length of the tube through which oil and gas pass from the respective reserve to the well head. They are conventionally positioned at either the tube base or at another position within the bottom third of the tube. Typical filter lengths are between lOm and 100m with an average length of 30m. Recent investigations have been carried out into the use of horizontal tubes which would require longer filter lengths.
Conventional filters include gravelpack filters in which a specially graded gravel typically of 30 to 40 mesh is used in conjunction with a wire wrapped ribbed screen to prevent formation sand from entering the well bore; wire wrapped pipe based welded screens in which a stainless steel wrapping wire is welded to each rib wire of the screen which is in turn welded to a perforated pipe; and wire wrapped rod based welded screens which are similar to pipe-based screens but without a perforated pipe.
The wall thickness of these known filters is typically of the order of 0.5 inches. For a given outside diameter there is a smaller inside diameter which limits the gas and oil flow rates obtainable and restricts the diameter of the tooling which can be accommodated in the tube. The limited wall thickness often requires the use of some form of supporting structure whose presence also reduces the available internal space of the tube. Also conventional filters have an open area which equates approximately to 10% only of the total filter area. This has the effect of increasing within the filter build-up of scale and from mud residue of the original drilling process. Both of these factors have an effect on service life.
The present invention sets out to provide a deep well filter which overcomes or at least alleviates these and other problems present in conventional deep well filters.
According to the present invention in one aspect there is provided a deep well filter which comprises a tubular assembly of at least two superimposed wire mesh layers, the aperture size and wire diameter of any one mesh layer being different from the aperture sizes and wire diameter(s) of its neighbouring mesh layer or layers.
The layers may each be produced from steel or nickel alloy. The steel is preferably a stainless steel and may be, for example, a 304 or 316 stainless steel.
In a preferred arrangement, the tubular assembly comprises at least five superimposed steel wire mesh layers.
The superimposed wire mesh layers are preferably roll bonded together.
In one arrangement the aperture size and wire diameter of the inner and outer mesh layers are the same. The aperture sizes and wire diameters of the mesh layers which lie next to the inner and outer mesh layers may also be the same, although different from those of the inner and outer mesh layers.
Seven steel mesh layers may be provided the aperture size and wire diameter of the first and seventh such layers being the same, those of the second fourth and sixth layers being the same but different from the first and seventh, and those of the third and fifth layers being different from those of the other five layers. The third and fifth layers may be of the same or different aperture size and wire diameters.
In another aspect the invention provides a method for producing a deep well filter which comprises passing at least two superimposed layers of steel or nickel alloy mesh through the nip of a rolling mill at a rolling load sufficient to produce a relatively flat bonded panel substantially free of delaminations, passing the roll bonded panel through a furnace to promote sintering of the superimposed mesh layers, forming the panel into a tube, and welding the adjoining edges of the panel together.
The superimposed layers may be passed through a furnace with a reducing atmosphere before entering the nip of the rolling mill to remove any oil residue and to soften the mesh layers. The steel of mesh layers is preferably a stainless steel, especially a stainless steel of 304L specification.
Before rolling, the edges of the super imposed mesh sheets are preferably spot welded together. Sintering is preferably effected within a reducing atmosphere.
The tubular assembly may be produced by spiral welding of continuous lengths of the steel or nickel alloy layers. After welding, the tubular assembly may be coiled.
The invention will now be described by way of example only with reference to the accompanying diagrammatic drawing in which the sole
Figure is an elevational view of a tubular deep well filter in accordance with the invention.
As will be seen from the accompanying drawing, the deep well filter comprises seven superimposed sheets of stainless steel or nickel alloy wire mesh. The individual sheet layers are bonded together to form a panel which is free of all delaminations. The abutting panel edges are spotwelded together. Alternatively, the layers may be produced in continuous lengths which are spirally welded into tube form. The continuously formed tube may then be coiled.
Individual tubes are typically of 5 feet in length, these tubes being circumferentially welded together as required to produce longer filter lengths. The aperture size and wire diameter of each of the bonded sheets are different from its neighbouring sheet or sheets. A typical arrangement of steel mesh sheets is:
Layer No. Layer Code Aperture Wire Diameter (mm) (mm > 1 A 5.00 2.00 2 B 1.49 0.63 3 C 0.16 0.10 4 B 1.49 0.63 5 D 0.26 0.16 6 B 1.49 0.63 7 A 5.00 2.00 The outside diameters of filter tubes in accordance with the invention are typically 177.8mm and 82.5mm.
The arrangement of steel mesh sheets is effected to increase significantly the open area of the filter. Typically the open area of a tubular filter in accordance with the invention is of the order of 45%. This compares with an open area of 10% for conventional screen filters. The increased open area has the effect of reducing scale build-up and build-up from mud residue from the original drilling process leading to longer service life. Also, filters in accordance with the invention are both stronger and stiffer than conventional screen filters in terms of resistance to axial compression. This is important when additional force is being applied to the tubular filter to overcome obstacles during downhole installation.
To produce a deep well filter in accordance with the invention, appropriate sheets of steel mesh conveniently to a 304L stainless steel specification are initially passed through a furnace with a reducing atmosphere to remove any oil residue and to soften the mesh sheets. The sheets are then assembled in the appropriate configuration and the edges of the assembled sheets are spot-welded together. The assembled sheets are then passed through a rolling mill at a rolling load sufficient to produce a flat bonded panel free of delaminations.
The roll panel is then passed through a furnace with a reducing atmosphere to promote sintering of the various mesh sheets.
The panel is then formed into its required tubular shape by a bending operation and the adjoining side edges of the panel are welded to form a welded seam. Individual tubular filters may then be circumferentially welded together to produce a deep well filter of the
required length.
It will be appreciated that the foregoing is merely exemplary of deep
well filters in accordance with the invention and that various modifications
may readily be made thereto without departing from the true scope of the
invention.
Claims (17)
1. A deep well filter which comprises a tubular assembly of at least two
superimposed wire mesh layers, the aperture size and wire diameter
of any one mesh layer being different from the aperture sizes and
wire diameter(s) of its neighbouring mesh layer or layers.
2. A filter as claimed in claim 1 wherein each layer is produced from
steel.
3. A filter as claimed in claim 2 wherein the steel is a stainless steel.
4. A filter as claimed in claim 1 wherein each layer is produced from a
nickel alloy.
5. A filter as claimed in any one of claims 1 to 4 wherein the tubular
assembly comprises at least five superimposed wire mesh layers.
6. A filter as claimed in any one of claims 1 to 5 wherein the
superimposed wire mesh layers are roll bonded together.
7. A filter as claimed in any one of claims 1 to 6 wherein the aperture
size and wire diameter of the inner and outer mesh layers are the
same.
8. A filter as claimed in any one of claims 1 to 7 wherein the aperture
sizes and wire diameters of the mesh layers which lie next to the
inner and outer mesh layers are the same, although different from
those of the inner and outer mesh layers.
9. A filter as claimed in any one of claims 1 to 8 wherein seven wire
mesh layers are provided the aperture size and wire diameter of the
first and seventh such layers being the same, those of the second
fourth and sixth layers being the same but different from the first
and seventh, and those of the third and fifth layers being different
from those of the other five layers.
10. A filter as claimed in claim 9 wherein the third and fifth layers are
of the same aperture size and wire diameters.
11. A method for producing a deep well filter which comprises passing
at least two superimposed layers of steel or nickel alloy mesh
through the nip of a rolling mill at a rolling load sufficient to
produce a relatively flat bonded panel substantially free of
delaminations, passing the roll bonded panel through a furnace to
promote sintering of the superimposed mesh layers, forming the
panel into a tube, and welding the adjoining edges of the panel
together.
12. A method as claimed in claim 11 wherein the superimposed layers are
passed through a furnace with a reducing atmosphere before
entering the nip of the rolling mill to remove any oil residue and to
soften the mesh layers.
13. A method as claimed in claim 12 wherein before rolling, the edges of
the superimposed wire mesh sheets are spot welded together.
14. A method as claimed in any one of claims 11 to 13 wherein sintering
is effected within a reducing atmosphere.
15. A method as claimed in any one of claims 11 to 14 wherein the tubular
assembly is produced by spiral welding of continuous lengths of the
steel or nickel alloy layers.
16. A method as claimed in claim 15 wherein after welding, the tubular
assembly is coiled.
17. A deep well filter substantially as herein described and as described
with reference to the sole Figure of the accompany diagrammatic
drawing.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9522662A GB2306894B (en) | 1995-11-04 | 1995-11-04 | Deep well filters |
PCT/GB1996/002665 WO1997017525A1 (en) | 1995-11-04 | 1996-10-31 | Deep well filters |
AU73214/96A AU7321496A (en) | 1995-11-04 | 1996-10-31 | Deep well filters |
EP96935136A EP0858549A1 (en) | 1995-11-04 | 1996-10-31 | Deep well filters |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB9522662A GB2306894B (en) | 1995-11-04 | 1995-11-04 | Deep well filters |
Publications (3)
Publication Number | Publication Date |
---|---|
GB9522662D0 GB9522662D0 (en) | 1996-01-03 |
GB2306894A true GB2306894A (en) | 1997-05-14 |
GB2306894B GB2306894B (en) | 1999-06-02 |
Family
ID=10783425
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB9522662A Expired - Fee Related GB2306894B (en) | 1995-11-04 | 1995-11-04 | Deep well filters |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0858549A1 (en) |
AU (1) | AU7321496A (en) |
GB (1) | GB2306894B (en) |
WO (1) | WO1997017525A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2003012254A1 (en) * | 2001-07-30 | 2003-02-13 | Weatherford/Lamb, Inc. | Sintered wellscreen |
US6799686B2 (en) * | 2000-05-18 | 2004-10-05 | Halliburton Energy Services, Inc. | Tubular filtration apparatus |
JP2020110804A (en) * | 2020-04-07 | 2020-07-27 | 富士フィルター工業株式会社 | Filter element |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114460115A (en) * | 2021-07-26 | 2022-05-10 | 中海油能源发展股份有限公司 | Indoor scale sample treatment device and treatment method thereof |
Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB324924A (en) * | 1928-08-01 | 1930-02-03 | Joseph Allen Pickard | Improvements in or relating to filters |
GB416097A (en) * | 1933-03-15 | 1934-09-13 | Auto Klean Strainers Ltd | Improvements in or relating to filtering or straining apparatus |
GB423088A (en) * | 1934-08-24 | 1935-01-24 | Western States Machine Co | Improvements relating to filter sieves for use in filtration of liquid bodies carrying suspended solid material |
GB1285574A (en) * | 1969-04-17 | 1972-08-16 | Atomic Energy Authority Uk | Improvements in or relating to filters |
GB1419780A (en) * | 1971-12-03 | 1975-12-31 | Ctre Et Rech Etats Surface | Filtering element |
GB1510799A (en) * | 1974-04-24 | 1978-05-17 | Neratoom | Filter means for cold trap devices |
EP0228262A2 (en) * | 1985-12-27 | 1987-07-08 | Nagaoka Kanaami Kabushiki Kaisha | Double cylinder screen |
US4696751A (en) * | 1986-08-04 | 1987-09-29 | Dresser Industries, Inc. | Vibratory screening apparatus and method for removing suspended solids from liquid |
GB2227947A (en) * | 1988-11-24 | 1990-08-15 | Maurice Gray | A board game |
US5004049A (en) * | 1990-01-25 | 1991-04-02 | Otis Engineering Corporation | Low profile dual screen prepack |
US5308370A (en) * | 1992-01-23 | 1994-05-03 | Dynamit Nobel Aktiengesellschaft | Filter device for filtering a gas flow |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2388640A (en) * | 1943-12-17 | 1945-11-06 | Edward J Moore | Well point |
GB926911A (en) * | 1958-07-08 | 1963-05-22 | Sintered Products Ltd | Improvements in or relating to porous metallic material |
CH462783A (en) * | 1968-05-16 | 1968-09-30 | Bopp & Co G | Filter bodies made of metal fibers |
US3780872A (en) * | 1968-05-27 | 1973-12-25 | Pall Corp | Filters comprising anisometric compressed and bonded multilayer knitted wire mesh composites |
GB1271867A (en) * | 1968-10-04 | 1972-04-26 | Amf Inc | Filter element |
DE2541383C3 (en) * | 1975-09-17 | 1978-05-24 | Haver & Boecker, 4740 Oelde | Process for the production of multi-layer filter hollow bodies for gaseous or liquid media and then produced filter hollow bodies |
US4858691A (en) * | 1988-06-13 | 1989-08-22 | Baker Hughes Incorporated | Gravel packing apparatus and method |
DE3925596A1 (en) * | 1989-08-02 | 1991-02-07 | Schwaebische Huettenwerke Gmbh | METHOD FOR PRODUCING A FILTER AND FILTER THEREFORE PRODUCED |
JP3396246B2 (en) * | 1993-01-18 | 2003-04-14 | 株式会社ナガオカ | Multilayer composite screen |
US5411084A (en) * | 1994-06-13 | 1995-05-02 | Purolator Products N.A., Inc. | Sand filter system for use in a well |
-
1995
- 1995-11-04 GB GB9522662A patent/GB2306894B/en not_active Expired - Fee Related
-
1996
- 1996-10-31 EP EP96935136A patent/EP0858549A1/en not_active Withdrawn
- 1996-10-31 WO PCT/GB1996/002665 patent/WO1997017525A1/en not_active Application Discontinuation
- 1996-10-31 AU AU73214/96A patent/AU7321496A/en not_active Abandoned
Patent Citations (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB324924A (en) * | 1928-08-01 | 1930-02-03 | Joseph Allen Pickard | Improvements in or relating to filters |
GB416097A (en) * | 1933-03-15 | 1934-09-13 | Auto Klean Strainers Ltd | Improvements in or relating to filtering or straining apparatus |
GB423088A (en) * | 1934-08-24 | 1935-01-24 | Western States Machine Co | Improvements relating to filter sieves for use in filtration of liquid bodies carrying suspended solid material |
GB1285574A (en) * | 1969-04-17 | 1972-08-16 | Atomic Energy Authority Uk | Improvements in or relating to filters |
GB1419780A (en) * | 1971-12-03 | 1975-12-31 | Ctre Et Rech Etats Surface | Filtering element |
GB1510799A (en) * | 1974-04-24 | 1978-05-17 | Neratoom | Filter means for cold trap devices |
EP0228262A2 (en) * | 1985-12-27 | 1987-07-08 | Nagaoka Kanaami Kabushiki Kaisha | Double cylinder screen |
US4696751A (en) * | 1986-08-04 | 1987-09-29 | Dresser Industries, Inc. | Vibratory screening apparatus and method for removing suspended solids from liquid |
GB2227947A (en) * | 1988-11-24 | 1990-08-15 | Maurice Gray | A board game |
US5004049A (en) * | 1990-01-25 | 1991-04-02 | Otis Engineering Corporation | Low profile dual screen prepack |
US5308370A (en) * | 1992-01-23 | 1994-05-03 | Dynamit Nobel Aktiengesellschaft | Filter device for filtering a gas flow |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6799686B2 (en) * | 2000-05-18 | 2004-10-05 | Halliburton Energy Services, Inc. | Tubular filtration apparatus |
WO2003012254A1 (en) * | 2001-07-30 | 2003-02-13 | Weatherford/Lamb, Inc. | Sintered wellscreen |
US6612481B2 (en) | 2001-07-30 | 2003-09-02 | Weatherford/Lamb, Inc. | Wellscreen |
GB2391571A (en) * | 2001-07-30 | 2004-02-11 | Weatherford Lamb | Sintered wellscreen |
GB2391571B (en) * | 2001-07-30 | 2005-05-11 | Weatherford Lamb | Sintered wellscreen |
JP2020110804A (en) * | 2020-04-07 | 2020-07-27 | 富士フィルター工業株式会社 | Filter element |
Also Published As
Publication number | Publication date |
---|---|
GB2306894B (en) | 1999-06-02 |
AU7321496A (en) | 1997-05-29 |
GB9522662D0 (en) | 1996-01-03 |
EP0858549A1 (en) | 1998-08-19 |
WO1997017525A1 (en) | 1997-05-15 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20001104 |