GB2342372A - Apparatus for cleaning well casings or pipes - Google Patents
Apparatus for cleaning well casings or pipes Download PDFInfo
- Publication number
- GB2342372A GB2342372A GB9923374A GB9923374A GB2342372A GB 2342372 A GB2342372 A GB 2342372A GB 9923374 A GB9923374 A GB 9923374A GB 9923374 A GB9923374 A GB 9923374A GB 2342372 A GB2342372 A GB 2342372A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cleaning apparatus
- cleaning
- tubing
- spring member
- well casings
- 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.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 31
- 238000007790 scraping Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000010959 steel Substances 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
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
- E21B37/02—Scrapers specially adapted therefor
- E21B37/04—Scrapers specially adapted therefor operated by fluid pressure, e.g. free-piston scrapers
- E21B37/045—Free-piston scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/0436—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes provided with mechanical cleaning tools, e.g. scrapers, with or without additional fluid jets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/043—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes
- B08B9/047—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved by externally powered mechanical linkage, e.g. pushed or drawn through the pipes the cleaning devices having internal motors, e.g. turbines for powering cleaning tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/02—Cleaning pipes or tubes or systems of pipes or tubes
- B08B9/027—Cleaning the internal surfaces; Removal of blockages
- B08B9/04—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes
- B08B9/053—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction
- B08B9/055—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes moved along the pipes by a fluid, e.g. by fluid pressure or by suction the cleaning devices conforming to, or being conformable to, substantially the same cross-section of the pipes, e.g. pigs or moles
- B08B9/0553—Cylindrically shaped pigs
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Cleaning In General (AREA)
Abstract
Apparatus for cleaning a well casing or a pipe comprises a helical spring member 10 having sharp corners arranged outwardly to scrape accumulated deposits off the internal wall of a well casing or pipe. The spring member may be mounted on a length of tubing or be provided with a piston to enable it to be hydraulically or pneumatically driven along the inside of a tube. When mounted on a length of tubing, movement of the spring member 10 up and down the tubing is constrained by collars 12,13 catching upon a saddle 22. An hydraulic or pneumatic motor may be provided to induce rotational movement in the spring member.
Description
Cleaning Apparatus
The present invention relates to a cleaning apparatus, in particular, a apparatus for scraping the inner bore of pipework, for example a well casing.
Oil is usually extract from a well by some type of conduit, such as a well casing. When oil has been produced for some time from the well, it is often found that matter from the oil has become encrusted upon the inner surface of the conduit. These deposits may be of very viscous oil, or of other mineral matter carried up with the oil, such as limescale, sand or corrosion of the base metal.
The result of these deposits is a reduction in the effect inner diameter of the well casing, and so a reduction in the flow of the oil from the reservoir.
A known device for attempting to alleviate these deposits comprises scraping blades which are moved through the well casing. Such blades are prone to break off or become caught in the deposit. Another known method uses a plurality of pads, which when moved through a well casing scour the inner surface. The bristles of such pads are usually inefficient at loosening tough deposits. Both these systems are relatively complex to make, involving many components and tend to clog up and become ineffective.
The object of the present invention is to provide an easily fabricated apparatus for removing or reducing deposits from inner surfaces of pipeworks.
According to the present invention there is provided cleaning apparatus for cleaning well casings and the like, comprising a resilient member comprising an external surface and being arranged in helical form such that the external surface of the resilient member acts against the internal wall, of a well casing, with a predetermined force.
The resilient member may arranged upon the end of a length of tubing.
Preferably the helical form is substantially cylindrical with a curved axial profile.
Preferably the resilient member forming the helix has an angular section providing a vertex which points radially and outwardly of the cleaning apparatus to engage the internal wall of a tube.
Hydraulic or pneumatic piston means may be associated with the cleaning apparatus which enable the apparatus to be propelled along a tube.
Preferably hydraulic or pneumatic motor means are provided to induce a rotational movement in the spring member. Also a flow path may be provided through the apparatus to clear accumulated debris ahead of the device as it progresses.
Cleaning apparatus embodying the invention will now be described, by way of example, with reference to the following drawings in which :
Fig. 1 is a longitudinal cross section through one embodiment the cleaning apparatus according to the invention;
Fig. 2 is a longitudinal cross section of a further embodiment of the cleaning device of the invention;
Fig. 3 is a longitudinal section of the device of fig. 2 installed within a tube, and
Fig. 4 is a longitudinal cross section of a further embodiment of the cleaning device of the invention.
Referring to the drawings, a spring member 10 is mounted upon a length of tubing 20 by two collars 12, 13. The tubing includes a saddle 22 located between the two collars.
The spring member 10 comprises a length of rod which has been wound into a helical shape. The diameter of the helix is not uniform, but is slightly larger than that of the tubing at its top and bottom, and widens to a maximum diameter midway along its length. The maximum diameter of the spring member is comparable to the inner diameter of the well casing.
The rod has a uniform square section, and is aligned so that a diagonal line across this square joining two of the squares vertices is either perpendicular to or parallel with the axis of the helix. Thus the square vertices point outwardly to engage the inside walls of a tube which the device is to scrape clean.
The rod is composed of a resilient material such as steel. The helix may then be compressed or stretched both axially, and perpendicular to the axis so that its maximum diameter is altered.
A portion of the rod at each end of the spring member 10 is firmly secured in a collar 12,13, these collars encompassing the tubing 20 so as to be slidable upon it.
The spring member 10 is placed upon the tubing 20 so that the saddle 22 of the tubing is located between the two collars 12,13. The outer diameter of the saddle is greater than that of the inner diameter of the collars, so that the movement of the spring member up and down the tubing is constrained by the collars catching upon the saddle.
The spring member 10 is located close to one end of a length of tubing 20, but far enough away from the end to ensure that the collar closest to the end of the tubing cannot disengage from the tubing.
To operate the cleaning apparatus, the end of the tubing having the spring member upon it is inserted into the top of the well casing. The tubing is then forced downwards (say with a CT injector) through the well casing. When encrustations upon the inner surface of the well casing are encountered, the spring member will slide upon the tubing until the saddle constrains it. At this point it will continue with the tubing down the well casing, the diameter of the spring member catching upon and removing the deposits by a scraping action as it goes.
Some deposits may be of a very tough nature and have adhered themselves firmly to the well casing wall. If the scraper was of a very stiff material, there is a danger that the spring member could become caught upon the deposits and so stuck fast, or, in trying to free such a stuck spring member, a component of the scraper could be damaged. The material of the spring member though, being of a somewhat elastic nature, when encountering such a difficult deposit, the spring member deforms so as to expand axially and compress radially, reducing its diameter so that it can pass by these deposits.
When the tubing is hauled upwards, the spring member slides down the tubing until the upper collar engages with the saddle. Tough deposits not removed on the first run downwards may thus be acted upon on the return journey. Even when the spring member compresses somewhat to pass such deposits, some scraping action takes place. Particularly difficult deposits then may have several passes dedicated to gradually removing them.
The inner diameter of the well casing could either be monitored by separate equipment, or the resistance to movement of the tubing could be examined, giving an indication of the deposit levels at the point the location of the spring member.
The profile of the helix, and the section of the rod, may be varied to obtain different scraping characteristics. Although the spring member ideally engages with the tubing at both ends in order to remain aligned with the well casing, the saddle could be located at the end of the tubing, the end of the spring member engaging with the end of the tubing as the tubing is lowered, and trailing behind the tubing as it is raised.
The system is here described for the scraping of the inner bore of a well casing, but it could equally be applied to any pipework which needs to have material excised from its inner bore.
Figs. 2 and 3 show an embodiment of the scrapping device 35 which in common with the previous embodiment is comprised of a spring 35 with outwardly facing points which scrape against the inside surface of the tube 34. The scrapping apparatus is provided with an hydraulic piston 30 seal at one end and a cone shaped nose 31 with a central hole 32 is provided at the opposite end. Thus hydraulic pressure provided behind the scrapping device in the direction of arrow A will cause the scrapping device to move in the direction of arrow A and as it does so clean the inside walls of the tubing 34.
This embodiment is preferably used for tubing which is open at both ends.
Typically, although not necessarily, this would be tubing which is not in use at the time the cleaning is carried out but, instead, the tubing may be arranged on a reel and the scrapping apparatus can be inserted at one end and the hydraulic (or pneumatic) pressure applied behind it with an appropriate seal on the end of the tube. The scrapping device would pass through the entire length of the tube whilst the tube remained in its reeled state on a reel.
Referring now to fig. 4 a further embodiment is shown in which two spring members 40a, 40b are arranged in series along a central shaft in two parts 41a and 41b. The shafts 41a, 41b have a continuous hollow bore 42 extending from hydraulic plug means 43 arranged at one end on the device to a guide nose 44 arranged at the other end. An hydraulic motor 45 is arranged axially with respect to the shafts 41a, 41b and between the two spring members 40a, 40b. During us hydraulic fluid passes through the hollow bore 42 and drives the motor 45. The motor induces rotation movement in the spring members 40a, 40b. Preferably one spring 40a may be induced to rotate in the opposition direction to the other spring member 40b. As with previous embodiment the hydraulic fluid acting on thc piston 43 also induces the cleaning device to move along the tube being cleaned so that the internal walls of the tube a progressively scrapped cleaned as the device passes along the tube. This rotation movement of the spring members in this embodiment assists with this cleaning action and also helps to remove the debris which has be scrapped off the internal wall of the tube and helps to prevent any clogging of the device by the debris.
The spring members are described here as either being lowered upon a length of tubing or driven hydraulically. Naturally, other means of lowering and driving the cleaning device could be used such as cable means of sufficient stiffness to propel the spring member through the well casing, and the driving force supplied to the spring member could be supplemented, for example, by traction means.
Claims (9)
- CLAIMS 1. Cleaning apparatus for cleaning well casings and the like, comprising a resilient member comprising an external surface and being arranged in helical form such that the external surface of the resilient member acts against the internal wall, of a well casing, with a predetermined force.
- 2. Cleaning apparatus for cleaning well casings and the like according to claim 1, wherein the resilient member is arranged upon the end of a length of tubing.
- 3. Cleaning apparatus for cleaning well casings and the like according to claim 1, wherein the helical form is substantially cylindrical with a curved axial profile.
- 4. Cleaning apparatus for cleaning well casings and the like according to claims 2 or 3, wherein the resilient member forming the helix has an angular section providing a vertex which points radially and outwardly of the cleaning apparatus to engage the internal wall of a tube.
- 5. Cleaning apparatus according to any preceding claim characterised in that hydraulic or pneumatic piston means are associated with the cleaning apparatus which enable the apparatus to be propelled along a tube
- 6. Cleaning apparatus according to claim 5, wherein hydraulic or pneumatic motor means are provided to induce a rotational movement in the spring member.
- 7. Cleaning apparatus according to claim 5, wherein a flow path is provided through the apparatus to clear accumulated debris ahead of the device as it progresses.
- 8. Cleaning apparatus substantially as herein described.
- 9. Any novel and inventive feature or combination of features specifically disclosed herein within the meaning of Article 4H of the International Convention (Paris Convention).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9822066.8A GB9822066D0 (en) | 1998-10-09 | 1998-10-09 | Cleaning apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB9923374D0 GB9923374D0 (en) | 1999-12-08 |
| GB2342372A true GB2342372A (en) | 2000-04-12 |
Family
ID=10840297
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9822066.8A Ceased GB9822066D0 (en) | 1998-10-09 | 1998-10-09 | Cleaning apparatus |
| GB9923374A Withdrawn GB2342372A (en) | 1998-10-09 | 1999-10-05 | Apparatus for cleaning well casings or pipes |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GBGB9822066.8A Ceased GB9822066D0 (en) | 1998-10-09 | 1998-10-09 | Cleaning apparatus |
Country Status (1)
| Country | Link |
|---|---|
| GB (2) | GB9822066D0 (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004028714A1 (en) * | 2002-09-24 | 2004-04-08 | Ibex Geo-Tech Limited | Apparatus for cleaning the surfaces of bores |
| WO2005049240A1 (en) * | 2003-11-17 | 2005-06-02 | The Boc Group Plc | Exhaust gas treatment |
| GB2431703A (en) * | 2005-10-26 | 2007-05-02 | Cree Inc | Gas tube cleaning plunger arrangement |
| WO2011070321A3 (en) * | 2009-12-08 | 2011-09-15 | Industrial Brushware Limited | Pipe cleaning apparatus |
| CN103233701A (en) * | 2013-04-17 | 2013-08-07 | 罗绍东 | Reduction spiral spring for tubing paraffin removal of pumping well |
| EP2934774A4 (en) * | 2012-12-21 | 2016-08-24 | Ulf Englund | Device for cleaning of pipes |
| WO2019185334A1 (en) * | 2018-03-27 | 2019-10-03 | Expro North Sea Limited | A wax cutting tool for removing wax from an oil well tubing |
| EP3753642A1 (en) * | 2019-06-17 | 2020-12-23 | Sea to Sky Energy Solutions Corp. | Conduit cleaner |
| CN114535230A (en) * | 2022-03-02 | 2022-05-27 | 红云红河烟草(集团)有限责任公司 | Cleaning device and method for dragging type filter stick launching tube |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111828989B (en) * | 2020-06-29 | 2025-01-21 | 光大环境科技（中国）有限公司 | In-pipe mud cleaning device for sludge cloth on incinerator and garbage incinerator |
| CN112934872A (en) * | 2021-03-31 | 2021-06-11 | 通威太阳能(眉山)有限公司 | Cleaning robot in pipe |
| CN113898061B (en) * | 2021-11-08 | 2023-03-28 | 山东慧创信息科技有限公司 | Wisdom building water supply and drainage pipeline pull throughs |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030377A (en) * | 1964-04-25 | 1966-05-25 | Ward S Flexible Rod Company Lt | Means for removing silt, scale and scum from drain pipes and the like |
| US4159742A (en) * | 1977-12-27 | 1979-07-03 | Chromalloy American Corporation | Well bore cleaning tool |
| GB2142111A (en) * | 1983-06-18 | 1985-01-09 | Baron Walter J | Heat exchanger with tube cleaning elements |
| US4612986A (en) * | 1984-06-04 | 1986-09-23 | Fosdick Jr Frank D | Well cleaning apparatus and treating method |
| US5030291A (en) * | 1989-08-04 | 1991-07-09 | Eau-Viron Incorporated | Method for cleaning concentric columns |
| US5335723A (en) * | 1993-06-29 | 1994-08-09 | Atlantic Richfield Company | Combination scratcher-centralizer for wellbore casings |
-
1998
- 1998-10-09 GB GBGB9822066.8A patent/GB9822066D0/en not_active Ceased
-
1999
- 1999-10-05 GB GB9923374A patent/GB2342372A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1030377A (en) * | 1964-04-25 | 1966-05-25 | Ward S Flexible Rod Company Lt | Means for removing silt, scale and scum from drain pipes and the like |
| US4159742A (en) * | 1977-12-27 | 1979-07-03 | Chromalloy American Corporation | Well bore cleaning tool |
| GB2142111A (en) * | 1983-06-18 | 1985-01-09 | Baron Walter J | Heat exchanger with tube cleaning elements |
| US4612986A (en) * | 1984-06-04 | 1986-09-23 | Fosdick Jr Frank D | Well cleaning apparatus and treating method |
| US5030291A (en) * | 1989-08-04 | 1991-07-09 | Eau-Viron Incorporated | Method for cleaning concentric columns |
| US5335723A (en) * | 1993-06-29 | 1994-08-09 | Atlantic Richfield Company | Combination scratcher-centralizer for wellbore casings |
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004028714A1 (en) * | 2002-09-24 | 2004-04-08 | Ibex Geo-Tech Limited | Apparatus for cleaning the surfaces of bores |
| WO2005049240A1 (en) * | 2003-11-17 | 2005-06-02 | The Boc Group Plc | Exhaust gas treatment |
| KR101326456B1 (en) * | 2003-11-17 | 2013-11-07 | 에드워즈 리미티드 | Exhaust gas treatment |
| US7685674B2 (en) | 2003-11-17 | 2010-03-30 | Edwards Limited | Exhaust gas treatment |
| CN1882398B (en) * | 2003-11-17 | 2010-09-01 | 爱德华兹有限公司 | Exhaust gas treatment |
| US8387194B2 (en) | 2005-10-26 | 2013-03-05 | Cree, Inc. | Apparatus for reducing buildup of deposits in semiconductor processing equipment |
| GB2431703B (en) * | 2005-10-26 | 2011-02-16 | Cree Inc | Methods and apparatus for reducing buildup of deposits in semiconductor processing equipment |
| US7865995B2 (en) | 2005-10-26 | 2011-01-11 | Cree, Inc. | Methods and apparatus for reducing buildup of deposits in semiconductor processing equipment |
| GB2431703A (en) * | 2005-10-26 | 2007-05-02 | Cree Inc | Gas tube cleaning plunger arrangement |
| WO2011070321A3 (en) * | 2009-12-08 | 2011-09-15 | Industrial Brushware Limited | Pipe cleaning apparatus |
| GB2476039B (en) * | 2009-12-08 | 2014-04-23 | Ind Brushware Ltd | Pipe cleaning apparatus |
| EP2934774A4 (en) * | 2012-12-21 | 2016-08-24 | Ulf Englund | Device for cleaning of pipes |
| CN103233701A (en) * | 2013-04-17 | 2013-08-07 | 罗绍东 | Reduction spiral spring for tubing paraffin removal of pumping well |
| WO2019185334A1 (en) * | 2018-03-27 | 2019-10-03 | Expro North Sea Limited | A wax cutting tool for removing wax from an oil well tubing |
| EP3753642A1 (en) * | 2019-06-17 | 2020-12-23 | Sea to Sky Energy Solutions Corp. | Conduit cleaner |
| CN114535230A (en) * | 2022-03-02 | 2022-05-27 | 红云红河烟草(集团)有限责任公司 | Cleaning device and method for dragging type filter stick launching tube |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9822066D0 (en) | 1998-12-02 |
| GB9923374D0 (en) | 1999-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |