WO2006121341A1 - Method and device for filtering in a well. - Google Patents

Method and device for filtering in a well. Download PDF

Info

Publication number
WO2006121341A1
WO2006121341A1 PCT/NO2006/000171 NO2006000171W WO2006121341A1 WO 2006121341 A1 WO2006121341 A1 WO 2006121341A1 NO 2006000171 W NO2006000171 W NO 2006000171W WO 2006121341 A1 WO2006121341 A1 WO 2006121341A1
Authority
WO
WIPO (PCT)
Prior art keywords
well
filter medium
accordance
filter
pipe
Prior art date
Application number
PCT/NO2006/000171
Other languages
French (fr)
Other versions
WO2006121341B1 (en
Inventor
Rune Freyer
Original Assignee
Easy Well Solutions As
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 Easy Well Solutions As filed Critical Easy Well Solutions As
Publication of WO2006121341A1 publication Critical patent/WO2006121341A1/en
Publication of WO2006121341B1 publication Critical patent/WO2006121341B1/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • 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
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B01D29/216—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets with wound sheets
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21B—EARTH DRILLING, e.g. DEEP 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
    • E21B43/10—Setting of casings, screens, liners or the like in wells
    • E21B43/103—Setting of casings, screens, liners or the like in wells of expandable casings, screens, liners, or the like
    • E21B43/108—Expandable screens or perforated liners

Definitions

  • This invention relates to a filter. More particularly it relates to a band-shaped filter medium that is made into a tubular shape and run into a well.
  • the filter may, with advantage, be brought to envelop a production pipe as the production pipe is run into the well.
  • the invention also includes a device for practising the method.
  • a filter often in the form of a sand screen, in the production zone of the well.
  • a sand screen of this kind most commonly forms part of the production pipe and must be assembled from sand screen sections before being run into the well.
  • control lines are to be extended through sand screens according to the prior art, it is necessary for lines to be extended in cable passages arranged for them in the sand screen. As the completion string is being installed, the lines must be joined at the end portions of the sand screens. This work is relatively extensive and may lead to the establishing of electrical connections which may fail during operation.
  • a filter is placed in a well by rounding a band-shaped filter medium into a tubular shape and running it into a well.
  • edge portions of the band-shaped filter medium are joined into a fold.
  • the filter medium may, with advantage, be wrapped around a production pipe as the production pipe is run into the well.
  • the filter medium is most advantageously formed by a band, which, before it is going to be used, is wound on a reel.
  • the filter medium When the filter medium is to be run into the well, typically enveloping a production pipe, the filter medium is pulled off the reel and is shaped, in a manner known itself, round the production pipe while the production pipe is run into the well. Simultaneously, the filter medium is folded, also in a manner known in itself, along its side edges to form a continuous encircling filter round the production pipe.
  • a filter of this kind which is continuous in its longitudinal direction, may extend across several pipe lengths and may envelop sand screens, perforated production pipes, pipe connections, valves or other pipe elements in connection with a production pipe.
  • the filter medium may be formed by, for example, a metal or fibre mesh, a mat made of synthetic fibre or other suitable materials or combinations of materials. Further, it maybe advantageous for the filter medium to be expandable.
  • the filter may be run into the well without the presence of a production pipe in the ordinary sense.
  • the filter may be brought to be laid out against a casing or formation wall in that the filter medium is expandable.
  • An example of an expandable material is EPDM rubber which swells on contact with well fluid.
  • the use of the method and device according to the invention forms a novel technique for filtering well fluid.
  • the invention may reduce, to a considerable degree, the costs relating to sand filters and adjacent equipment.
  • Figure 1 shows a principle drawing of a filter according to the invention.
  • Figure 2 shows an arrangement for transferring a filter medium from a roll to a production pipe.
  • the reference numeral 1 identifies a filter which includes a band-shaped filter medium 2 and which is located in a well 3 and encircles a production pipe 4.
  • the filter 1 may extend over a desired length of the production pipe 4, and the production pipe 4 may be formed by, for example, not shown perforated pipes, sand screens, valves, pipe connections and other equipment, known in itself, which is present in connection with a production pipe 4.
  • a cable 10 may, with advantage, be extended between the production pipe 4 and the filter 1, wherein the cable 10 which may include electrical and hydraulic lines, for example, may extend uninterrupted within the filter 1.
  • the band-shaped filter medium 2 is rolled off from a reel 12 and guided in an encircling manner onto the production pipe 4, as the production pipe 4 is simultaneously run into the well via a rotary table 14, for example.
  • the lower end of the filter medium 2 is connected to the production pipe 4.
  • Machines for wrapping a band and folding should be well known to a person skilled in the art and are not described in any further detail here.
  • the filter medium 2 is cut, after which the upper portion of the filter medium 2 is connected to the production pipe 4.
  • the filter medium 2 may be wound round the production pipe 4 while the edge portions 6 of the filter medium band 2 are joined together into a helical fold 8.

Abstract

A method and a device for placing a filter (1) in a well (3), wherein a band-shaped filter medium (2) is rounded into a tubular shape and run into the well (3).

Description

A METHOD AND A DEVICE FOR FILTERING
This invention relates to a filter. More particularly it relates to a band-shaped filter medium that is made into a tubular shape and run into a well. The filter may, with advantage, be brought to envelop a production pipe as the production pipe is run into the well. The invention also includes a device for practising the method.
During production from an underground well it may be a problem that sand, for example, is entrained in the well fluid into the production pipe.
According to the prior art it is usual to place a filter, often in the form of a sand screen, in the production zone of the well. A sand screen of this kind most commonly forms part of the production pipe and must be assembled from sand screen sections before being run into the well.
It has also become more usual to place controlled valves, for example, in connection with inlet openings into the production pipe. Equipment of this kind is often controlled electrically or hydraulically from the surface, and a connection line must, therefore, be extended from the surface down to the equipment in question.
If control lines are to be extended through sand screens according to the prior art, it is necessary for lines to be extended in cable passages arranged for them in the sand screen. As the completion string is being installed, the lines must be joined at the end portions of the sand screens. This work is relatively extensive and may lead to the establishing of electrical connections which may fail during operation.
Due to such unfavourable conditions, it is common, according to the prior art, to use an inner pipe which is set within the sand screen, and which includes the necessary cables and valves, and which involves considerable extra costs. The invention has as its object to remedy or reduce at least one of the drawbacks of the prior art.
The object is realized according to the invention through the features specified in the description below and in the following Claims.
According to the invention a filter is placed in a well by rounding a band-shaped filter medium into a tubular shape and running it into a well.
It is advantageous that the edge portions of the band-shaped filter medium are joined into a fold.
The filter medium may, with advantage, be wrapped around a production pipe as the production pipe is run into the well.
The filter medium is most advantageously formed by a band, which, before it is going to be used, is wound on a reel.
When the filter medium is to be run into the well, typically enveloping a production pipe, the filter medium is pulled off the reel and is shaped, in a manner known itself, round the production pipe while the production pipe is run into the well. Simultaneously, the filter medium is folded, also in a manner known in itself, along its side edges to form a continuous encircling filter round the production pipe.
The upper and lower end portions of the filter medium are clamped to the production pipe. A filter of this kind, which is continuous in its longitudinal direction, may extend across several pipe lengths and may envelop sand screens, perforated production pipes, pipe connections, valves or other pipe elements in connection with a production pipe.
It is a further advantage that cables, hydraulic pipes and similar my extend uninterrupted in the space between the production pipe and the filter. The filter medium may be formed by, for example, a metal or fibre mesh, a mat made of synthetic fibre or other suitable materials or combinations of materials. Further, it maybe advantageous for the filter medium to be expandable.
If suitable, the filter may be run into the well without the presence of a production pipe in the ordinary sense. The filter may be brought to be laid out against a casing or formation wall in that the filter medium is expandable.
An example of an expandable material is EPDM rubber which swells on contact with well fluid.
The use of the method and device according to the invention forms a novel technique for filtering well fluid. The invention may reduce, to a considerable degree, the costs relating to sand filters and adjacent equipment.
In what follows, there will be described a non-limiting example of a preferred embodiment which is visualized in the accompanying drawings, in which:
Figure 1 shows a principle drawing of a filter according to the invention; and
Figure 2 shows an arrangement for transferring a filter medium from a roll to a production pipe.
In the drawings the reference numeral 1 identifies a filter which includes a band-shaped filter medium 2 and which is located in a well 3 and encircles a production pipe 4.
Longitudinal edge portions 6 of the band-shaped filter medium 2 are joined together into a fold 8.
The filter 1 may extend over a desired length of the production pipe 4, and the production pipe 4 may be formed by, for example, not shown perforated pipes, sand screens, valves, pipe connections and other equipment, known in itself, which is present in connection with a production pipe 4. A cable 10 may, with advantage, be extended between the production pipe 4 and the filter 1, wherein the cable 10 which may include electrical and hydraulic lines, for example, may extend uninterrupted within the filter 1.
When the filter 1 is to be wrapped round the production pipe 4, the band-shaped filter medium 2 is rolled off from a reel 12 and guided in an encircling manner onto the production pipe 4, as the production pipe 4 is simultaneously run into the well via a rotary table 14, for example.
The lower end of the filter medium 2 is connected to the production pipe 4.
During the wrapping operation, the longitudinal edge portions 6 of the band-shaped filter medium 2 are joined together into the fold 8.
Machines for wrapping a band and folding should be well known to a person skilled in the art and are not described in any further detail here.
When the desired length of filter medium 2 is wrapped around the production pipe 4, the filter medium 2 is cut, after which the upper portion of the filter medium 2 is connected to the production pipe 4.
In an alternative embodiment, not shown, the filter medium 2 may be wound round the production pipe 4 while the edge portions 6 of the filter medium band 2 are joined together into a helical fold 8.

Claims

1. A method for placing a filter (1) in a well (3), c h a r a c t e r i z e d i n that a band-shaped filter medium (2) is rounded into a tubular shape and ran into the well (3).
2. A method in accordance with claim 1, c h a r a c t e r i z e d i n that edge portions (6) of the band-shaped filter medium (2) are joined together into a fold (8).
3. A method in accordance with claim 1, c h a r a c t e r i z e d i n that the filter medium (2) is wrapped around a production pipe (4) during the running-in of the production pipe (4) into the well (3).
4. A method in accordance with claim 1, c h a r a c t e r i z e d i n that the filter medium (2) is pulled out from a reel (12) before it is given a tubular shape and run into the well (3).
5. A filter device (1) in a well (3), c h a r a c t e r i z e d i n that a band- shaped filter medium (2) has been given a tubular shape and placed in a well (3).
6. A device in accordance with claim 5, c h a r a c t e r i z e d i n that the edge portions (6) of the band-shaped filter medium (2) are joined together into a fold (8).
7. A device in accordance with claim 5, c h a r a c t e r i z e d i n. that the filter (1) encircles a production pipe (4).
8. A device in accordance with claim 5, c h a r a c t e r i z e d i n that the filter (1) extends continuously in the longitudinal direction of the well and is arranged to extend over at least one of several pipe lengths, envelop sand screens, perforated production pipes, pipe connections, valves and other pipe elements in connection with a production pipe.
9. A device in accordance with claim 5, c h a r a c t e r i z e d i n that a cable or hydraulic pipe (10) or similar may extend uninterrupted between the production pipe (4) and the filter (1).
10. A device in accordance with claim 5, c h a r a c t e r i z e d i n that the filter medium 2 may be formed by at least one out of several from the group of metal or fibre mesh, mat made of synthetic fibre.
11. A device in accordance with claim 5, c h a r a c t e r i z e d i n that the filter medium (2) is expandable.
PCT/NO2006/000171 2005-05-09 2006-05-08 Method and device for filtering in a well. WO2006121341A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20052258 2005-05-09
NO20052258A NO323791B1 (en) 2005-05-09 2005-05-09 Filter method and arrangement

Publications (2)

Publication Number Publication Date
WO2006121341A1 true WO2006121341A1 (en) 2006-11-16
WO2006121341B1 WO2006121341B1 (en) 2006-12-28

Family

ID=35277011

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000171 WO2006121341A1 (en) 2005-05-09 2006-05-08 Method and device for filtering in a well.

Country Status (2)

Country Link
NO (1) NO323791B1 (en)
WO (1) WO2006121341A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7717180B2 (en) 2006-06-29 2010-05-18 Halliburton Energy Services, Inc. Swellable elastomers and associated methods
US8592352B2 (en) 2009-06-15 2013-11-26 Halliburton Energy Services, Inc. Cement compositions comprising particulate foamed elastomers and associated methods

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611399A (en) * 1995-11-13 1997-03-18 Baker Hughes Incorporated Screen and method of manufacturing
US20040004110A1 (en) * 2002-07-03 2004-01-08 Tubular Perforating Mfg., Ltd. Filter cartridge assembly and method of manufacture
US20040026313A1 (en) * 2002-08-09 2004-02-12 Arlon Fischer Todd Kenneth Multi-micron, multi-zoned mesh, method of making and use thereof
US20040118570A1 (en) * 2001-11-09 2004-06-24 Weatherford/Lamb, Inc. Wellscreen having helical support surface

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5611399A (en) * 1995-11-13 1997-03-18 Baker Hughes Incorporated Screen and method of manufacturing
US20040118570A1 (en) * 2001-11-09 2004-06-24 Weatherford/Lamb, Inc. Wellscreen having helical support surface
US20040004110A1 (en) * 2002-07-03 2004-01-08 Tubular Perforating Mfg., Ltd. Filter cartridge assembly and method of manufacture
US20040026313A1 (en) * 2002-08-09 2004-02-12 Arlon Fischer Todd Kenneth Multi-micron, multi-zoned mesh, method of making and use thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7717180B2 (en) 2006-06-29 2010-05-18 Halliburton Energy Services, Inc. Swellable elastomers and associated methods
US8592352B2 (en) 2009-06-15 2013-11-26 Halliburton Energy Services, Inc. Cement compositions comprising particulate foamed elastomers and associated methods
US8807216B2 (en) 2009-06-15 2014-08-19 Halliburton Energy Services, Inc. Cement compositions comprising particulate foamed elastomers and associated methods
US10087357B2 (en) 2009-06-15 2018-10-02 Halliburton Energy Services, Inc. Cement compositions comprising particulate foamed elastomers and associated methods

Also Published As

Publication number Publication date
NO323791B1 (en) 2007-07-09
NO20052258D0 (en) 2005-05-09
WO2006121341B1 (en) 2006-12-28
NO20052258L (en) 2006-11-10

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