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WO2001076780A1 - Dispositif de raclage articule - Google Patents

Dispositif de raclage articule Download PDF

Info

Publication number
WO2001076780A1
WO2001076780A1 PCT/GB2001/001323 GB0101323W WO0176780A1 WO 2001076780 A1 WO2001076780 A1 WO 2001076780A1 GB 0101323 W GB0101323 W GB 0101323W WO 0176780 A1 WO0176780 A1 WO 0176780A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipeline
sensors
payload
cleaning
instrumentation
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.)
Ceased
Application number
PCT/GB2001/001323
Other languages
English (en)
Inventor
Gwyn Brown Philip
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PSL TECHNOLOGY Ltd
Original Assignee
PSL TECHNOLOGY Ltd
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 PSL TECHNOLOGY Ltd filed Critical PSL TECHNOLOGY Ltd
Priority to AU39445/01A priority Critical patent/AU3944501A/en
Publication of WO2001076780A1 publication Critical patent/WO2001076780A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/26—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means
    • F16L55/265—Pigs or moles, i.e. devices movable in a pipe or conduit with or without self-contained propulsion means specially adapted for work at or near a junction between a main and a lateral pipe
    • 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
    • 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
    • B08B9/0552—Spherically shaped pigs

Definitions

  • the present invention relates to an improved pipeline pigging device, suitable for cleaning or monitoring a pipeline.
  • Pipeline pigs are well known devices that in the past have conventionally comprised a cylindrical elongate body carrying a flexible disc or cup at either end.
  • the discs or cups usually have an external diameter which is approximately equal to the internal diameter of the pipeline such that the discs or cups wipe and clean the interior surface of the pipeline.
  • dedicated discs may be employed to provide a cleaning function; there being additional cups or discs adapted for propulsion of the pig along the pipeline.
  • pipeline pigging operations may be useful for many diverse applications beyond merely cleaning of a pipeline.
  • the pigs may carry a variety of measuring equipment, including sensors, accelerometers, odometers and the like.
  • Sharp bends in this context may be defined as a bend with a radius of approximately equal to or less than 1.5 x diameter of the pipeline. It will be understood that it is necessary to ensure that a pig must be able to manoeuvre through such a restriction, which becomes more problematic the greater the extent of elongation of the pig. Yet, in order to function in a pipeline and maintain constant contact or near contact with the internal surfaces of the pipeline, a pig is generally designed to have a length which is at least as long as the internal diameter of the pipeline, otherwise it may ⁇ flip' over as it travels through the pipeline.
  • pigs in the shape of spheres have been employed as regardless of their orientation they present a constant cross sectional shape within the pipe, the diameter being adapted to match the internal dimensions of the pipeline. It follows that spherical pigs are adapted to negotiate sharp bends more efficiently than any other shaped pig, which inevitably will have a greater ratio of length to cross-section orthogonal to the axis of the pipeline. Thus spherical pigs have been found suitable for various cleaning functions in a pipeline. Nevertheless, spherical pigs heretofore have been associated with a significant disadvantage in that they are not as capable as other conventional pigs to carry payloads, i.e sensors and or other instrumentation for performing more sophisticated operations.
  • spherical pigging devices have the characteristic that they are generally free to alter their attitude as they move along the pipeline, which although assists their ability to negotiate demanding geometries, renders measured data difficult to interpret. For example, it would not be clear if temperature measured by a temperature sensor at any point in time was indicative of temperature at the pipeline wall where friction induced heat may exist, or rather at a point near the centre of the pipeline occupied only by fluid. Similarly, the reading of an odometer on a spherical pig with constantly changing orientation would not provide a true indication of linear distance travelled.
  • spherical pigs are generally good for cleaning pipelines that have one or more sharp bends, but have no or limited usefulness in monitoring the prevalent conditions within the pipeline.
  • apparatus for cleaning a pipeline and carrying a payload of instrumentation or sensors, wherein the apparatus comprises a train of at least two pigs which are mutually connected by an articulating member therebetween, wherein the articulating member is connected to each of a respective first and second pig by a respective pivotal joint at or near each end of the articulating member that permits independent pivotal movement of each pig relative to the articulating member within a predetermined angle of freedom, and wherein each of the pigs is afforded an approximate spherical or part spherical shape on respective external surfaces thereof.
  • the pigs are substantially spherical but incorporate conical cut out portions for receiving the articulating member.
  • the cut out portions may be sized and shaped to provide a means for determining the extent of freedom of pivot of the articulating member relative to each pig.
  • the apparatus includes a restoring means for restoring the angular relationship or orientation of the pigs relative to the articulating member to a predetermined position.
  • the pivotal joint provided at each end of the articulating member is a ball and socket joint.
  • the pivotal joint may be a mechanical spring.
  • the apparatus contains monitoring means for monitoring the conditions within the pipeline.
  • monitoring means will include conductivity sensors, temperature sensors, out-of-round indicators, odometers, and other sensors or indicators commonly used in the art to measure or monitor conditions within a pipeline.
  • said monitoring means is contained within an instrument canister, which may be removed from the apparatus to allow data processing when the apparatus is retrieved from the pipeline. It should be appreciated that some data processing may be conducted in real time while the apparatus is run through the pipeline.
  • the articulating member may support a communication link between the first and second pig for communicating data or power.
  • data can be transferred via a cable or other hard wiring from a sensor in one pig to a data storage means in the other pig, the cable or other hard wiring being conveyed through the articulating member.
  • the pivotal joints are universal joints, or a combination of universal joints, which allow the articulating member to move within a predetermined angle of freedom relative to each pig, but which limits the twisting of the pigs relative to each other and/or relative to the articulating member.
  • the pigs are made of a polymer material such as polyurethane.
  • the external diameter of one or more of the pigs is approximately equal to the internal diameter of the pipeline.
  • the apparatus is designed to have a forward and rearward end, wherein a forward or front pig is adapted to drive the apparatus through the pipeline under fluid pressure, and wherein a rear pig or pigs are provided with by pass channels or flow paths to allow said fluid to bypass the rear pig or pigs and provide a net positive pressure to the front pig for driving the apparatus through the pipeline.
  • the apparatus may nevertheless be adapted for bidirectional movement through the pipeline.
  • the apparatus may include any number of pigs in excess of two, there being provided an additional articulating member for each additional pig.
  • Figure 1 illustrates a conventional pipeline pig known to the art
  • Figure 2 illustrates apparatus for cleaning and monitoring the conditions within a pipeline in accordance with the present invention
  • Figure 3 illustrates an alternative embodiment of the apparatus for cleaning and monitoring the conditions within a pipeline of Figure 2.
  • a traditional pipeline pig known to the art and generally depicted at 1 is comprised of an elongate body 2 which supports flexible cups 3 at the front and rear of the body 2.
  • the flexible cups may support cleaning members such as scrapers or studs (not shown) .
  • the pig shown in Figure 1 is not adapted to negotiate sharp bends in a pipeline.
  • a pipeline pigging device generally depicted at 4 is comprised of a front spherical pig 5 and a rear spherical pig 6. Both the front 5 and rear 6 pigs have a conical shaped cavity 7. The front 5 and rear 6 pigs are connected by an articulating member 8 which is connected by a pivotal joint 9 to the conical shaped cavity 7 of the front 5 and rear 6 pigs.
  • the external diameter of the pipeline pig 4 is approximately equal to the internal diameter of the pipeline (not shown) in which it is to be used and accordingly the pig 4 wipes the internal diameter of the pipe as it is propelled along the pipeline, typically by the product which is being conducted along the line.
  • the rear pig 6 has a plurality of by pass ports 10 which allow fluid to pass through the rear pig 6 and accordingly drive the pipeline pigging device 4 from the front through the pipeline (not shown) .
  • the front 5 and rear 6 spherical pigs carry a variety of sensors and/or detectors, otherwise known as the payload, which act to monitor the environment and conditions within the pipeline.
  • the payload may include for example a temperature sensor 11 or conductivity sensor 12.
  • the conductivity sensor 12 is particularly important as it allows the operator to identify areas of altered conductivity where there may be an accumulation of water which may corrode the pipe.
  • the pigs 5 and 6 may carry a corrosion sensor 13a or an out of round indicator 13b which allow the operator to identify areas of the line which are dented, sagging or are damaged.
  • the pigs 5 and 6 may carry an odometer 14 which allows the pipeline pig to be ⁇ tracked' , by virtue of measuring the distance the pig 4 has been propelled along the pipeline (not shown) .
  • the pipeline pig 4 may also contain an on-board data processor 15.
  • the payload may be carried on the articulating member 8 or contained within an instrument canister 16 which protects the instruments from damage, and also allows easy retrieval and replacement of the instruments when the pipeline pig 4 is retrieved from the pipeline. This is an advantage over the conventional spherical shaped pigs which have a limited area for supporting monitoring instruments and cannot carry a large or significant payload.
  • the articulating member 8 is pivotably connected to the front 5 and rear 6 pigs by virtue of a ball and socket joint (not shown) located in the conical cavity 7 of the pigs 5 and 6.
  • the ball and socket joint allows the articulating member 8 to pivot and move within the boundaries set by the walls of the conical cavity 7.
  • the degree of movement of the front 5 and rear 6 pigs relative to each other can be determined at the time of manufacture, by changing the angle of the conical cavity 7 which is cut into the pigs 5 and 6.
  • the articulated pigs 5 and 6 are therefore afforded a considerable freedom of movement relative of each other by virtue of the articulating member 8 being pivotably mounted by a ball and socket joint. This affords the pipeline pig 4 a superior ability in negotiating sharp bends in a pipeline (not shown) .
  • the apparatus it would be desirable for the apparatus to have a bias or restoring means for restoring the articulating member to an appropriate optimum position relative to the pigs it connects. Typically, this position would be in the centre of the conical cavity.
  • the restoring means may be one or more springs or may be induced by locating the joint between the articulating member and a respective pig away from the centre of the pig, such that a moment or restoring force is induced when the relationship between the articulating member and respective pig diverges from a central position.
  • the pigs 5 and 6 are able to communicate with each other.
  • the articulating member 8 allows data and other information to be transferred between the front 5 and rear 6 pigs.
  • the information may be transferred electronically, and in such a case the electric circuitry (not shown) will be contained in the articulating member 8.
  • the electric circuitry (not shown) will be contained in the articulating member 8.
  • the pivotable joints 9 which connect the articulating member 8 to each of the front 5 and rear 6 pigs are universal joints, or combination of universal joints.
  • these joints allow relative freedom of movement and pivoting of the articulating member 8 within the conical shaped cavity 7 of the pigs 5 and 6, and corresponding movement and articulation of the front 5 and rear 6 pig relative to each other, but prevents the articulating member 8 from twisting or spinning, which may occur with a ball and socket joint.
  • Figure 3 shows three spherical pigs 17, 18 and 19 which are connected by a first and second articulating member 20 and 21.
  • the advantage of the present invention is that the pipeline pig will be capable of negotiating sharp bends within a pipeline by virtue of the pig components having a spherical, or part spherical shape.
  • the rotation and orientation of the pigs will be controlled to ensure optimum functioning of the payload.
  • an additional advantage is that the articulating member of the present invention allows for two or more pigs to communicate with each other within a pipeline to allow data to be conveyed from one pig to the other.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Cleaning In General (AREA)
  • Pipeline Systems (AREA)

Abstract

La présente invention concerne un appareil destiné à nettoyer une canalisation et à porter une charge utile d'instruments et de capteurs, lequel appareil comprend un train de racleurs sensiblement sphériques (5, 6) reliés par un élément articulé (8). L'élément articulé (8) est tel qu'il permet le mouvement individuel de chaque racleur (5,6) par rapport à lui-même. L'appareil de l'invention peut être utilisé pour négocier des coudes en équerre dans une canalisation tout en limitant la rotation incontrôlée des racleurs. L'appareil de l'invention est par conséquent apte à supporter une charge utile d'instruments et de dispositifs de mesure destinés à assurer une surveillance efficace et précise des conditions physiques à l'intérieur de la canalisation.
PCT/GB2001/001323 2000-04-06 2001-03-26 Dispositif de raclage articule Ceased WO2001076780A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39445/01A AU3944501A (en) 2000-04-06 2001-03-26 Articulated pigging device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0008373.3 2000-04-06
GB0008373A GB0008373D0 (en) 2000-04-06 2000-04-06 Articulated pigging device

Publications (1)

Publication Number Publication Date
WO2001076780A1 true WO2001076780A1 (fr) 2001-10-18

Family

ID=9889265

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/001323 Ceased WO2001076780A1 (fr) 2000-04-06 2001-03-26 Dispositif de raclage articule

Country Status (3)

Country Link
AU (1) AU3944501A (fr)
GB (1) GB0008373D0 (fr)
WO (1) WO2001076780A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005119117A1 (fr) * 2004-05-28 2005-12-15 Pii Pipetronix Gmbh Procede, dispositif et appareil pour nettoyer, mesurer, inspecter ou analogue, des conduites tubulaires qui ne peuvent pas etre raclees
FR2894653A1 (fr) * 2005-12-12 2007-06-15 Service Nat Dit Gaz De France Dispositif pour le sechage d'une canalisation destinee a vehiculer un fluide
CN102921685A (zh) * 2012-10-29 2013-02-13 韩先锋 天然气弯管道双向清通器及敷涂器
WO2015065365A1 (fr) 2013-10-30 2015-05-07 Daniel Warren Procédé et système pour revêtir un tuyau
WO2017032984A1 (fr) * 2015-08-24 2017-03-02 I2I Pipelines Limited Appareil et procédé pour prédire ou détecter des hydrates
US10486206B2 (en) 2015-06-04 2019-11-26 1863815 Ontario Limited Apparatus, system and method for cleaning inner surfaces of tubing with bends
WO2020167540A1 (fr) * 2019-02-11 2020-08-20 S & B Technical Products, Inc. Sphère de conduit avec dispositif de suivi
US10753525B2 (en) 2014-01-06 2020-08-25 Uresh Ag Aseptic pipeline pig with identification means
EP3801936A4 (fr) * 2018-05-25 2022-03-02 Quest Integrity Group, LLC Système et procédé de nettoyage de serpentins de dispositif de chauffage à combustion
CN115921453A (zh) * 2022-12-29 2023-04-07 国家石油天然气管网集团有限公司 一种长输原油管道变径清管器

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE117277C (fr) * 1900-01-20
US2810143A (en) * 1954-06-24 1957-10-22 Phillips Petroleum Co Paraffin scraper
US3074436A (en) * 1960-10-26 1963-01-22 Gulf Research Development Co Pipeline batching pig
DE1473654A1 (de) * 1962-03-28 1969-03-27 Water Res Ass Vorrichtung zur Aussendung oder UEbertragung von Signalen
US4442674A (en) * 1980-09-11 1984-04-17 Repa Feinstanzwerk Gmbh Driving device
DE9012809U1 (de) * 1990-09-07 1990-11-08 F.B. Lehmann Maschinenfabrik Gmbh, 7080 Aalen Rohrleitungsmolch für Rohrsysteme
GB2305989A (en) * 1995-10-06 1997-04-23 Rst Projects Limited Pipeline condition monitoring system and apparatus
DE19714464A1 (de) * 1996-04-12 1997-10-30 Ka Te System Ag Steuereinrichtung für ein Fluidaggregate aufweisendes Gerät und Vorrichtung zum Sanieren von Rohren
US5790476A (en) * 1995-09-12 1998-08-04 Motorola Inc. Methods and systems for locating an underground sewer using a buoy

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE117277C (fr) * 1900-01-20
US2810143A (en) * 1954-06-24 1957-10-22 Phillips Petroleum Co Paraffin scraper
US3074436A (en) * 1960-10-26 1963-01-22 Gulf Research Development Co Pipeline batching pig
DE1473654A1 (de) * 1962-03-28 1969-03-27 Water Res Ass Vorrichtung zur Aussendung oder UEbertragung von Signalen
US4442674A (en) * 1980-09-11 1984-04-17 Repa Feinstanzwerk Gmbh Driving device
DE9012809U1 (de) * 1990-09-07 1990-11-08 F.B. Lehmann Maschinenfabrik Gmbh, 7080 Aalen Rohrleitungsmolch für Rohrsysteme
US5790476A (en) * 1995-09-12 1998-08-04 Motorola Inc. Methods and systems for locating an underground sewer using a buoy
GB2305989A (en) * 1995-10-06 1997-04-23 Rst Projects Limited Pipeline condition monitoring system and apparatus
DE19714464A1 (de) * 1996-04-12 1997-10-30 Ka Te System Ag Steuereinrichtung für ein Fluidaggregate aufweisendes Gerät und Vorrichtung zum Sanieren von Rohren

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8197611B2 (en) 2004-05-28 2012-06-12 Pii Pipetronix Gmbh Method, device and tool for cleaning, surveying, inspecting, etc. unpiggable pipelines
WO2005119117A1 (fr) * 2004-05-28 2005-12-15 Pii Pipetronix Gmbh Procede, dispositif et appareil pour nettoyer, mesurer, inspecter ou analogue, des conduites tubulaires qui ne peuvent pas etre raclees
FR2894653A1 (fr) * 2005-12-12 2007-06-15 Service Nat Dit Gaz De France Dispositif pour le sechage d'une canalisation destinee a vehiculer un fluide
CN102921685A (zh) * 2012-10-29 2013-02-13 韩先锋 天然气弯管道双向清通器及敷涂器
EP3800391A1 (fr) * 2013-10-30 2021-04-07 Warren Environmental & Coating, LLC Procédé et système de revêtement d'un tuyau
WO2015065365A1 (fr) 2013-10-30 2015-05-07 Daniel Warren Procédé et système pour revêtir un tuyau
EP3063451A4 (fr) * 2013-10-30 2017-06-14 Daniel Warren Procédé et système pour revêtir un tuyau
US10753525B2 (en) 2014-01-06 2020-08-25 Uresh Ag Aseptic pipeline pig with identification means
US10486206B2 (en) 2015-06-04 2019-11-26 1863815 Ontario Limited Apparatus, system and method for cleaning inner surfaces of tubing with bends
WO2017032984A1 (fr) * 2015-08-24 2017-03-02 I2I Pipelines Limited Appareil et procédé pour prédire ou détecter des hydrates
EP3801936A4 (fr) * 2018-05-25 2022-03-02 Quest Integrity Group, LLC Système et procédé de nettoyage de serpentins de dispositif de chauffage à combustion
US11890654B2 (en) 2018-05-25 2024-02-06 Quest Integrity Group, Llc System and method of cleaning fired heater coils
GB2595618A (en) * 2019-02-11 2021-12-01 S & B Technical Products Inc Pipeline sphere with tracking device
WO2020167540A1 (fr) * 2019-02-11 2020-08-20 S & B Technical Products, Inc. Sphère de conduit avec dispositif de suivi
US11293580B2 (en) 2019-02-11 2022-04-05 S&B Technical Products, Inc. Pipeline sphere with tracking device
GB2595618B (en) * 2019-02-11 2022-10-05 S & B Technical Products Inc Pipeline sphere with tracking device
US11644143B2 (en) 2019-02-11 2023-05-09 S & B Technical Products, Inc. Pipeline sphere with tracking device
CN115921453A (zh) * 2022-12-29 2023-04-07 国家石油天然气管网集团有限公司 一种长输原油管道变径清管器

Also Published As

Publication number Publication date
GB0008373D0 (en) 2000-05-24
AU3944501A (en) 2001-10-23

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