EP2305948A1 - Ensemble de brosse - Google Patents
Ensemble de brosse Download PDFInfo
- Publication number
- EP2305948A1 EP2305948A1 EP09171406A EP09171406A EP2305948A1 EP 2305948 A1 EP2305948 A1 EP 2305948A1 EP 09171406 A EP09171406 A EP 09171406A EP 09171406 A EP09171406 A EP 09171406A EP 2305948 A1 EP2305948 A1 EP 2305948A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- brush assembly
- brushing
- arms
- assembly according
- arm
- 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
- 230000001680 brushing effect Effects 0.000 claims abstract description 63
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 229910000639 Spring steel Inorganic materials 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 2
- 239000003921 oil Substances 0.000 description 9
- 239000012530 fluid Substances 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 4
- 238000007373 indentation Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000010779 crude oil Substances 0.000 description 2
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000011208 reinforced composite material Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000011499 joint compound Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
Definitions
- the present invention relates to a brush assembly for performing a cleaning and/or brushing operation in a casing downhole, the brush assembly having a longitudinal axis and comprising at least one brushing element.
- the brushing element comprises a centre part and a plurality of arms.
- scales may be formed in the well fluid and precipitate onto the sides of the casing wall or onto other elements comprised in a completion, such as a valve.
- Such scales are very rigid and stick easily to the casing wall or valve, and are thus very difficult to remove without damaging the valve or weakening the wall.
- Prior art cleaning tools have individual wires fastened to the side of the tool or a rail in the tool.
- the wires are often too soft to be able to clean scales off a valve and/or of the sides of a casing wall.
- the brushes often get worn fast. When the brushes get worn, they lose their brushing effect and need to be replaced or, in some cases, the entire cleaning tool needs to be substituted by a new tool. Furthermore, replacement of the brushes in the prior art solutions are very cumbersome.
- a brush assembly for performing a cleaning and/or brushing operation in a casing downhole, the brush assembly having a longitudinal axis and comprising:
- a cleaning tool is obtained in which the brushes are strong enough to brush the interior of a casing downhole, cleaning it free off rigid debris and other precipitated materials, such as scales and the like.
- the rectangular cross-sectional configuration of the arm may have two first opposing sides being longer than two second opposing sides.
- the arm is able to bend easier in one direction than in another direction, thus making the arm more flexible in one direction and more rigid in the other direction.
- the centre part may be a longitudinal element, a winded part, or a disc.
- the arms may extend through the centre part, be securely connected to the centre part, or the arms and the centre part is formed as one element.
- the brushing element may be made from a sheet element.
- a cleaning tool is obtained which is easy to manufacture and which facilitates maintenance and replacements of brushing elements.
- the sheet element may be made of metal or a reinforced composite material.
- the metal may e.g. be spring steel.
- Spring steel is extremely stress resistant and has an inherent flexibility, which allows the arms of the brushing element to return to their original shape despite significant bending or twisting.
- the spring steel may comprise 0.50%-2.50% silicon, 0.20%-2.50% manganese, and 0.02%-1.50% carbon.
- the arms of the brushing element may extend radially from the centre part and they may be distributed around the centre part with an even distance and/or an uneven distance between them.
- the arms may have a length and a width.
- part of the arms may be twisted around their length in an angle ⁇ .
- the arm forms a tapered point end.
- the angle ⁇ may be between 0-85°, preferable between 20-65°, more preferably between 30-60°.
- a second part of the arm is given an angle ⁇ in relation to the other first part of the arm.
- the second part of the arm is made flexible in a direction angled by the angle ⁇ in relation to the first part.
- the arm When the part of the arm is twisted in angle ⁇ , the arm does not substantially damage the inside wall of the casing or the valve since the arm is able to bend away from the direction of rotation. If the arm is not twisted, it can only bend in the direction of rotation which will not happen or in a direction perpendicular thereto. By twisting the arm, it is easier for the arm to bend when operating the tool.
- a second part of the arm furthest away from the centre part is twisted.
- the second part is 10-90% of the length of the arm, preferably 30-70% of the length of the arm, and more preferably 40-60% of the length of the arm.
- the thickness of the sheet element may be between 0.2 and 3.0 mm.
- the brushing element may be arranged on a shaft and the centre part of the brushing element may comprise locking means adapted to engage with corresponding locking means of the shaft.
- the purpose of equipping the brushing element with locking means is to hinder the brushing element from rotating around the shaft.
- a plurality of brushing elements may be arranged in succession along the longitudinal axis of the brush assembly, which makes it possible to clean and brush a greater area.
- the brushing elements may be spaced apart by distance bushes.
- the lengths of the arms of the brushing elements may be substantially identical or the arms of the brushing elements may have different lengths.
- the length of the arms near a front end of the brush assembly is shorter than the length of the arms of the subsequent brushing elements.
- the object to be cleaned may thus be cleaned very gently, as the shorter arms near the front end rip up the surface of the elements to be removed before they are removed by the subsequent, longer arms.
- the brush assembly may comprise a first end piece arranged at the front end of the assembly and a second end piece arranged at a back end of the assembly.
- the second end piece may be adapted to engage with a rotatable element, allowing the brushing element to be rotated.
- the invention also relates to a brushing element for use in a brush assembly as described above and to use of such a brush assembly for cleaning or brushing a variety of different objects downhole.
- the invention relates to a downhole tool comprising one or more brush assemblies as described above.
- the downhole tool may also comprise an anchor section for anchoring the tool in a position downhole, e.g. against the inside wall of a casing.
- the invention also relates to a downhole system comprising such a downhole tool and a driving unit, such as a downhole tractor.
- the invention relates to a brush assembly 1 for removing scales from e.g. a valve, a casing wall, or a sleeve and for cleaning the openings in a perforated section of the casing.
- the brush assembly 1 comprises at least one brushing element 2 as shown in Fig. 1 .
- the brushing element 2 is here a plate-shaped element 18, where the brushes are created when the element is cut out from a metal plate or sheet.
- the brushing element 2 is cut into the shape of a flower or a sun, the flower petals or sunbeams constituting the arms 4 of the brush.
- the brush assembly 1 may comprise several brushing elements 2 spaced apart by a distance bush 10.
- the brushing elements 2 and the distance bushes 10 are arranged on a common shaft 7 and are held together by a first 12 and a second end piece 13.
- Each distance bush 10 is in the form of a ring.
- the thickness of the distance bushes 10 may vary along the longitudinal axis of the brush assembly 1.
- the arms and the centre part is formed as one element, such as the brushing element 2 being cut from a single metal sheet, the arms 4 of the brush assembly 1 have been made substantially more rigid than in prior art solutions. During a cleaning operation, the arms 4 may be worn out, or damaged. When the brushing element 2 is manufactured in one piece, the brush assembly may be easily repaired in that damaged arms 4 may be replaced quickly by simply replacing the brushing element. Furthermore, the brushing element 2 is easy to manufacture, avoiding additional mounting processes for fastening the arms in the centre part 3.
- the arms 4 have both a tapering part and a straight part.
- the tapering part is much smaller so that the arm is substantially straight.
- the brush assembly 1 is shown having seven brushing elements 2; however, in another embodiment, it may comprise as few as one or even more than seven brushing elements.
- centre part 3 is shown in the form of a disc 18, the centre part may have a variety of shapes, being a longitudinal element, a winded part, or the like shape.
- the arms may also extend through the centre part, or be securely connected to the centre part.
- securely connected is meant any form of fastening, such as by means of welding, glue, screws, rivets or the like fastening means.
- the brushing elements 2 are provided with locking means 8 for hindering the elements from rotating around the shaft 7.
- the locking means 8 may be indentations 19 matching projections 20 on the shaft 7, preventing the brushing element 2 from rotating.
- the indentations 19 and projections 20 may have any suitable form and, in another embodiment, the locking means may be provided with projections matching indentations in the shaft 7 instead.
- the brush assembly 1 may comprise a rotatable element 15, such as a spindle 21 and a connecting element (not shown) as shown in Fig. 4 .
- the spindle 21 may either slide in relation to the connecting element, so that the spindle rotates and the connecting element is fixed, or the connecting element may slide in relation to spindle, so that the connecting element rotates and the spindle is fixed.
- the shaft 7 or the second end piece 13 is connected with the rotating part, whether this is the connecting element or the spindle 21.
- the brushing elements 2 can be moved back and forth while rotating in order to remove scales from e.g. a valve.
- the spindle 21 may have any suitable pattern 22 in order to engage the connecting element and provide rotation.
- the spindle is shown as a spindle able to return without having to change the direction of rotation.
- the rotatable element 15 may be a shaft rotated by means of hydraulics, pneumatics, an electronic motor, or the like.
- the length of the arms 4 may differ between the brushing elements. Accordingly, the arms 4 of the first brushing element 2 or the first couple of brushing elements situated in the front end of the brush assembly 1, i.e. the end of the assembly first encountering the object to be cleaned, may be shorter than the arms of the subsequent brushing element or elements. Similarly, the arms 4 of these brushing elements 2 may again be shorter than the arms of the subsequent brushing element or elements.
- the brushing element 2 has 20 arms 4 extending radially outwards and the arms are spaced along the periphery of the centre part 3 at an equal distance. However, the arms 4 may also be spaced at an uneven distance.
- Each arm 4 is rectangular in shape and has a width w and a length L and a thickness which is less than the width, which again is less than the length.
- the arms 4 of all the brushing elements 2 have substantially the same thickness; however, they may also have different thicknesses.
- the arms 4 of the first brushing element 2 may e.g. be thinner than the arms of the subsequent brushing element or brushing elements.
- the arms 4 may have a thickness of 0.2-3.0 mm, preferably 0.3-2.0 mm, and more preferably 0.4-1.0 mm.
- the sheet or plate-shaped element 18 from which the brushing element 2 is manufactured may made of any substantially rigid material having the flexibility necessary for the brush to remove the scales without damaging the object to be cleaned.
- the sheet or plate-shaped element 18 may thus be made of a metal sheet or plate or a reinforced composite material. If metal is used, spring steel is advantageous as it is both stress resistant and flexible enough to be able to return to its original shape despite significant bending and twisting.
- the spring steel may comprise 0.50%-2.50% silicon, 0.20%-2.50% manganese, and 0.02%-1.50% carbon.
- the metal sheet may also be made of austenitic stainless steel.
- the brushing element 2 has twenty straight arms 4. Each arm 4 may be twisted in order to provide flexibility to the arm in two directions. The arms 4 may be twisted around their lengths L or have a bended or corrugated shape when seen from one side or in cross-section along the length.
- each arm 4 may be partly twisted so that a first part 23 of the arm closest to the centre part 3 is maintained in the same plane 25 as the original sheet element from which it was made, whereas a second part 24 of the arm is twisted.
- the upper plane 26 of the twisted second part 24 is twisted at an angle ⁇ of approximately 45° to the plane 25 of the first part 23, forming a tapered point end 5.
- the angle ⁇ may be between 0-85°, preferable between 20-65°, more preferably between 30-60°.
- a second part of the arm furthest away from the centre part is twisted.
- the second part is 10-90% of the length of the arm, preferably 30-70% of the length of the arm, and more preferably 40-60% of the length of the arm.
- the second part is approximately 50% of the length of the arm so that the twist is distributed along the middle 6 of the arm.
- the second part of the arm is made flexible in a direction angled by the angle ⁇ in relation to the upper plane 25 of the first part.
- the arm does not substantially damage the inside wall of the casing or the valve since the arm is able to bend away from the direction of rotation. If the arm is not twisted, it can only bend in the direction of rotation which will not occur or in a direction perpendicular thereto. By twisting the arm, it is easier for the arm to bend when operating.
- Fig. 5 shows a downhole tool 16 comprising a brush assembly 1.
- the tool 16 may also comprise an anchor section 17 which may be used to anchor the tool to the inside wall of the casing before the cleaning operation with the brush assembly 1 begins.
- the tool 16 may also have so-called no-gos (not shown), i.e. hindering devices arranged outside the tool.
- the devices abut a restriction (not shown) or a bottleneck (not shown) in the casing preventing the tool 16 from moving any further and the brush assembly 1 is subsequently moved further into the casing in order to clean the casing from within.
- the brush assembly 1 can be used for cleaning a variety of different objects downhole. Due to the stiffness and high yield strength of the brushing elements 2, the brush assembly 1 is highly suitable for removing even very difficult elements from the object, such as scales from a valve, without doing any essential damage to the valve preventing it from functioning properly subsequently.
- the well fluid may also comprise other elements, such as shavings or formation pieces from a drilling process, which are very difficult to remove unless by means of a brush assembly 1 according to the present invention.
- fluid or well fluid any kind of fluid that may be present in oil or gas wells downhole, such as natural gas, oil, oil mud, crude oil, water, etc.
- gas is meant any kind of gas composition present in a well, completion, or open hole
- oil is meant any kind of oil composition, such as crude oil, an oil-containing fluid, etc.
- Gas, oil, and water fluids may thus all comprise other elements or substances than gas, oil, and/or water, respectively.
- a casing all kinds of pipes, tubings, tubulars, liners, strings etc. used downhole in relation to oil or natural gas production.
- a downhole tractor can be used to push the tools all the way into position in the well.
- a downhole tractor is any kind of driving tool capable of pushing or pulling tools in a well downhole, such as a Well Tractor®.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090171406 EP2305948B1 (fr) | 2009-09-25 | 2009-09-25 | Ensemble de brosse |
PCT/EP2010/064132 WO2011036244A1 (fr) | 2009-09-25 | 2010-09-24 | Ensemble de brosse |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP20090171406 EP2305948B1 (fr) | 2009-09-25 | 2009-09-25 | Ensemble de brosse |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2305948A1 true EP2305948A1 (fr) | 2011-04-06 |
EP2305948B1 EP2305948B1 (fr) | 2012-08-08 |
Family
ID=42084604
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP20090171406 Not-in-force EP2305948B1 (fr) | 2009-09-25 | 2009-09-25 | Ensemble de brosse |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP2305948B1 (fr) |
WO (1) | WO2011036244A1 (fr) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103114590A (zh) * | 2013-02-19 | 2013-05-22 | 青岛宝基利工程技术咨询有限公司 | 一种清除钻孔灌注桩钢护筒内壁泥浆的装置及其使用方法 |
CN104632132A (zh) * | 2015-02-03 | 2015-05-20 | 成都大漠石油机械有限公司 | 高效清洁石油管道的清洗机构 |
WO2015137819A1 (fr) * | 2014-03-11 | 2015-09-17 | Altus Intervention As | Outil permettant un nettoyage interne d'une colonne de production ou d'un tubage |
WO2015172030A1 (fr) * | 2014-05-09 | 2015-11-12 | General Electric Company | Canaux de nettoyage |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102644449A (zh) * | 2012-05-03 | 2012-08-22 | 西南石油大学 | 一种电缆式井下除垢装置 |
CN105422048B (zh) * | 2015-11-27 | 2017-12-05 | 中国石油天然气股份有限公司 | 一种分注井不动管柱机电一体化清垢系统及方法 |
CN105370244B (zh) * | 2015-11-27 | 2018-11-16 | 中国石油天然气股份有限公司 | 分注井不动管柱机电一体化清垢仪 |
EP3979888A4 (fr) * | 2019-06-10 | 2023-08-16 | Richard Eckhardt | Plumeau d'accès à distance |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2517017A (en) * | 1948-04-22 | 1950-08-01 | Texaco Development Corp | Erosion-abrasion cleaning device |
WO2001018351A1 (fr) * | 1999-09-06 | 2001-03-15 | Weatherford/Lamb, Inc. | Appareil et procede de nettoyage de trous de forage |
-
2009
- 2009-09-25 EP EP20090171406 patent/EP2305948B1/fr not_active Not-in-force
-
2010
- 2010-09-24 WO PCT/EP2010/064132 patent/WO2011036244A1/fr active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2517017A (en) * | 1948-04-22 | 1950-08-01 | Texaco Development Corp | Erosion-abrasion cleaning device |
WO2001018351A1 (fr) * | 1999-09-06 | 2001-03-15 | Weatherford/Lamb, Inc. | Appareil et procede de nettoyage de trous de forage |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103114590A (zh) * | 2013-02-19 | 2013-05-22 | 青岛宝基利工程技术咨询有限公司 | 一种清除钻孔灌注桩钢护筒内壁泥浆的装置及其使用方法 |
CN103114590B (zh) * | 2013-02-19 | 2014-09-03 | 青岛宝基利工程技术咨询有限公司 | 一种清除钻孔灌注桩钢护筒内壁泥浆的装置及其使用方法 |
WO2015137819A1 (fr) * | 2014-03-11 | 2015-09-17 | Altus Intervention As | Outil permettant un nettoyage interne d'une colonne de production ou d'un tubage |
GB2538435A (en) * | 2014-03-11 | 2016-11-16 | Qinterra Tech As | Tool for internal cleaning of a tubing or casing |
DK179304B1 (en) * | 2014-03-11 | 2018-04-23 | Qinterra Tech As | Tool for internal cleaning of a tubing or casing |
US10273783B2 (en) | 2014-03-11 | 2019-04-30 | Qinterra Technologies As | Tool for internal cleaning of a tubing or casing |
GB2538435B (en) * | 2014-03-11 | 2020-09-02 | Qinterra Tech As | Tool for internal cleaning of a tubing or casing |
WO2015172030A1 (fr) * | 2014-05-09 | 2015-11-12 | General Electric Company | Canaux de nettoyage |
US10837259B2 (en) | 2014-05-09 | 2020-11-17 | Baker Hughes Oilfield Operations Llc | Cleaning channels |
CN104632132A (zh) * | 2015-02-03 | 2015-05-20 | 成都大漠石油机械有限公司 | 高效清洁石油管道的清洗机构 |
Also Published As
Publication number | Publication date |
---|---|
EP2305948B1 (fr) | 2012-08-08 |
WO2011036244A1 (fr) | 2011-03-31 |
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