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WO1998007532A1 - Procedes d'inspection et de nettoyage de pipelines et appareil servant a mettre en oeuvre ces procedes - Google Patents

Procedes d'inspection et de nettoyage de pipelines et appareil servant a mettre en oeuvre ces procedes Download PDF

Info

Publication number
WO1998007532A1
WO1998007532A1 PCT/NL1997/000477 NL9700477W WO9807532A1 WO 1998007532 A1 WO1998007532 A1 WO 1998007532A1 NL 9700477 W NL9700477 W NL 9700477W WO 9807532 A1 WO9807532 A1 WO 9807532A1
Authority
WO
WIPO (PCT)
Prior art keywords
vehicle
pipeline
fluid
pump
spray head
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/NL1997/000477
Other languages
English (en)
Inventor
Jan Arie De Raad
Robert Van Agthoven
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.)
Rontgen Technische Dienst BV
Original Assignee
Rontgen Technische Dienst BV
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 Rontgen Technische Dienst BV filed Critical Rontgen Technische Dienst BV
Publication of WO1998007532A1 publication Critical patent/WO1998007532A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B08B9/049—Cleaning the internal surfaces; Removal of blockages using cleaning devices introduced into and moved along the pipes having self-contained propelling means for moving the cleaning devices along the pipes, i.e. self-propelled

Definitions

  • the invention relates to a method for inspecting pipelines which are used for conveying oil, gas and/or refining products derived therefrom.
  • the invention further relates to a method for cleaning such pipelines.
  • the invention relates to a system for carrying out such methods .
  • pipelines lying on the seabed connect a so-called 'charge facility' to the processing installation or storage (hereinafter referred to as 'installation') on the shore. It is also known to connect in this manner a tank farm on the shore to a so-called 'discharge facility' in order to transfer the load of oil and/or refining products derived therefrom, contained in a ship, to the tank farm.
  • the length of such pipelines usually varies from 1-15 km.
  • the walls of these pipelines should be inspected quite regularly to spot corrosion.
  • the purpose of the inspection is to detect and register weak spots in the pipeline so that measures can be taken to prevent leakage.
  • the inspections of the walls of the fluid-filled pipelines are carried out with apparatus known per se .
  • apparatus known per se use is made of ultrasound, inter alia.
  • the reflections of that sound against the wall are detected and analyzed.
  • an analysis of the wall can be made and corrosion spots can be detected and quantified.
  • the object of the invention is to provide a solution to the above-outlined problem.
  • the method can also be used for land pipelines.
  • the method for inspecting the pipeline comprises the following steps:
  • the vehicle comprising a motor for driving the vehicle, at least one spray head for generating a jet of fluid and a vehicle pump for feeding a fluid under pressure to the spray head;
  • the inner wall of the pipeline is treated in situ by a high-pressure jet of fluid, this inner wall can be cleaned effectively.
  • a jet of fluid of a high pressure can be generated in situ.
  • a pressure drop occurs of such magnitude that it is no longer possible to adequately clean the pipeline in situ.
  • the pump is located in the pipeline, in particular in the proximity of the location in the pipeline to be cleaned, the problem of the pressure drop is solved in accordance with the invention.
  • the vehicle is conveyed through the pipeline when this pipeline is filled with a fluid.
  • the vehicle is then conveyed through the pipeline when it is filled with the fluid products present in the pipeline for conveyance, and the fluid products present in the pipeline for conveyance are fed to the vehicle pump for cleaning the inner wall.
  • the products present in the pipeline for conveyance are pumped off and a different fluid is fed to the inside of the pipeline.
  • the vehicle is preferably conveyed through the pipeline when it is filled with the other fluid and the other fluid present in the pipeline is fed to the vehicle pump for cleaning the inner wall.
  • fluid is fed to the pump in a particularly simple and efficient manner.
  • fluid is fed to the vehicle pump via a flexible feed hose.
  • the pump located in the pipe then acts as a booster pump to ensure the development of a sufficiently powerful jet for cleaning the pipe.
  • the inspection of the pipeline is carried out with means that are at least partly disposed on the vehicle. In this manner, it would even be possible that the cleaning and the subsequent inspection of the pipeline be performed in one operation.
  • the system for cleaning pipelines is characterized in that the system comprises a vehicle having a motor for driving the vehicle, at least one spray head for generating a jet of fluid and a vehicle pump for feeding fluid under pressure to the spray head, the system further comprising fluid-feed means for feeding fluid to the vehicle pump.
  • a method for cleaning pipelines comprises the following steps:
  • the vehicle comprising a motor for driving the vehicle, at least one spray head for generating a jet of fluid and a vehicle pump for feeding a fluid under pressure to the spray head;
  • Fig. 1 shows a pipeline that is to be cleaned
  • Fig. 2 schematically shows a first possible embodiment of a system according to the invention for carrying out a method according to the invention
  • FIG. 3 schematically shows a cross section of the system according to Figs. 2 and 4; and Fig. 4 shows a second possible embodiment of a pipeline that is to be cleaned.
  • reference numeral 1 designates a storage or processing apparatus (installation) .
  • reference numeral 2 designates a charge facility for loading on site, via a pipe 4, a ship 6 with a refining product from the installation 1.
  • the installation 1 is connected to the charge facility 2 via an (underwater) pipeline 8.
  • the refining product is pumped from the installation 1 to the charge facility 2.
  • the ship 6 can be loaded on site at the charge facility 2.
  • a comparable apparatus can be employed. In that case, the facility acts as discharge facility 3, with the refining product being pumped from the ship 6 to the discharge facility 3, and then from the discharge facility 3, via the pipeline 8, to a tank storage place 10.
  • the pipeline 8 can have a length of, for instance, 1-15 km.
  • the pipeline 8 is manufactured from steel and hence susceptible to corrosion.
  • so-called corrosion spots are formed on the inner wall of the pipeline; corrosion may also occur on the outer surface. These corrosion spots may cause a leakage of the pipeline and, accordingly, a fire or an unsafe situation, or entail pollution of the environment. Therefore, it is desired to inspect the pipeline 8 over its full distance for imperfections.
  • the product to be conveyed through the pipeline can remain in the pipe or be replaced by another fluid such as (sea) ater. Subsequently, by means of ultrasound and the measuring of reflections of the pipe wall, an analysis of the wall can be carried out.
  • Fig. 2 shows a system 12 according to the invention for the cleaning and improved inspection of the pipeline 8.
  • the system 12 is for instance introduced into the pipeline 8 at the installation 1.
  • the manner in which the system 12 is introduced into the pipeline 8 is not essential to the invention.
  • the system consists of a vehicle 14 comprising a motor 16 for driving the vehicle 14.
  • the vehicle further comprises a spray head 18 for delivering a jet of fluid 20 and a vehicle pump 22 for feeding, under pressure, a fluid to the spray head 18 via conduit 24.
  • the system further comprises fluid- feed means 26 for feeding fluid to the vehicle pump 22.
  • the fluid-feed means 26 comprise at least one suction mouth 28 which is connected, via a conduit 30, to the vehicle pump 22.
  • a filter 32 is further disposed in the conduit 30.
  • the vehicle pump 22 is an electrically driven pump which, in use, generates a fluid pressure of at least 80 bar.
  • the motor 16 is also electrically driven.
  • the system further comprises a flexible, electric cable 34 for supplying electric energy to the motor 16 and the vehicle pump 22 of the vehicle.
  • the cable 34 extends from the vehicle to the end of the pipeline 8 at the installation 1. In or adjacent the installation 1, in a portion of the pipeline 8 that extends above fluid, an opening has been provided through which the vehicle 14 has been introduced into the pipe 8 and through which the cable 34 extends outside the pipe for supplying energy to this cable 34.
  • the electric cable has a length of at least 1 km and in this example even a length of 15 km to enable the vehicle 14 to run through the entire pipeline 8 to a position near the charge facility 2. Because the fouling of the pipe is particularly located in a bottom portion, indicated in Fig. 3 by the arrow 36, the spray head 18 is at least substantially downwardly directed. As a result, a jet of fluid is generated which is directed substantially downwards and which covers at least an area of the pipeline 8 indicated in Fig. 3 by the arrow 38.
  • the operation of the system is as follows. As stated, the pipeline 8 is filled with fluid 40. Next, the vehicle 14 is positioned in the pipeline 6. Via the electric cable 34, energy is supplied to the motor 16 of the vehicle 14, so that the vehicle starts to travel through the pipeline. Also, energy is supplied to the vehicle pump 22. As a result, the vehicle pump 22 will draw in fluid via the suction mouth 28, to subsequently spray this fluid in the form of the jet of fluid 20, via the spray head 18. This will cause the spray head to spray against the above-mentioned portion 38 of the inner wall of the pipeline for cleaning the inner wall. In this manner, at least almost the entire length of pipeline is cleaned while the vehicle travels. In this example, the vehicle will travel through the pipeline over a distance larger than 1 km.
  • this portion can be inspected in a manner known per se by means of ultrasound.
  • ultrasound is emitted and the reflections of the pipeline wall are detected and analyzed. From this analysis, known per se, relevant information about the presence of, for instance, corrosion spots in the pipeline 8 can be obtained.
  • similar means can be disposed on the vehicle 14 to enable checking the effectiveness of the cleaning process.
  • these means consist of an ultrasonic system and sensor 42. Via the cable 34, the signals generated by the ultrasonic system can for instance be fed to a register means for further processing, which register means is disposed at the installation 1. Because in this example, the vehicle 14 moves from left to right in the drawing, this implies that the means for carrying out the inspection analyze an uncleaned pipeline.
  • the means for carrying out the inspection also comprise a second ultrasonic system and a second sensor 44, which are also connected to the vehicle 14. In this case, the second sensor 44 is arranged so that it is located ahead of the vehicle 14, but aft of the spray head 18, and thus analyzes a cleaned pipeline.
  • the electric cable 34 has a (selected) specific gravity which at least substantially corresponds to the specific gravity of the predetermined fluid with which the pipeline 8 is filled. This will cause the electric cable 34 to float in the pipeline 8.
  • the floating electric cable 34 has the advantage that it hardly hinders the vehicle during travelling. Indeed, the vehicle does not have to drag the cable 34 across the pipe bottom in such manner that it involves a great friction having to be overcome.
  • Fig. 4 shows an alternative embodiment of the system according to the invention, in which parts corresponding to Fig. 2 have been provided with the same reference numerals.
  • the fluid-feed means 26 comprise an external pump 46 and a flexible feed hose 48.
  • an outlet 50 of the external pump 46 is connected to an inlet 52 of the vehicle pump 22 via the flexible feed hose 48.
  • the flexible feed hose 48 has a length of at least 1 km and in this case even a length up to 15 km.
  • the external pump 46 is arranged so as to be separate from the vehicle. In this example, the external pump 46 is disposed outside the pipe 8 at the installation 1.
  • a supply source 54 electric energy is supplied to the pump 22 and the motor 16 via the electric cable 34.
  • the operation of the system according to Fig. 4 is as follows .
  • the vehicle 14 is positioned in the pipeline 8.
  • electric energy is supplied to the pump 22 and the motor 16.
  • the external pump 46 fluid is fed to the vehicle pump 22.
  • the external pump 46 is for instance a high-pressure pump of 500 bar or more.
  • the vehicle pump 22 then acts as booster pump to increase the relatively low pressure in the pipe 48 adjacent the vehicle 14 to a desired level of, for instance, 80 bar.
  • the spray head 18 will again deliver a jet of fluid 20 of the required pressure of, for instance, 80 bar.
  • the vehicle as shown in Fig. 4 will also start to travel through the pipeline 8 while the substantially downwardly directed spray head 18 generates a jet of fluid 20 which removes the paraffin- like substance that had stayed behind on the bottom of the pipeline 8, to enable a proper inspection of the wall of the pipeline.
  • it also applies that it has preferably a (selected) specific gravity that is at least substantially equal to the specific gravity of the predetermined fluid with which the pipeline 8 is filled. This has an advantage comparable with the one discussed in relation to the cable 34.
  • the vehicle 14 can of course also be introduced at the charge facility 2, the discharge facility 3 or at the tank storage place 10.
  • the external pump 46 and the power supply 54 can be disposed, if so desired.
  • the fluid can be fed to the pipe 8 so that it can be drawn in by the pump 22 via the suction mouth 28.
  • the inspection of the pipeline can of course also be carried out with a different vehicle. In that case, in the vehicle 14 according to Figs. 2 and 4, the sensors 42 and 44 for carrying out the cleaning inspection may be omitted.
  • the spray head 18 may be designed for rotation in a known manner in order to clean for instance the inner wall along its entire circumference or a part thereof.
  • the spray head may be designed as an annular stationary and/or oscillating multi-spray head.
  • the motor may also be for instance a hydro otor.
  • the vehicle may be of a sectional as well as non-sectional construction.
  • other means for inspecting the inner wall of the (underwater) pipeline may be applied.
  • the invention may also be applied to underground and aboveground land pipelines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)

Abstract

Ce système de nettoyage de pipelines immergés (8), utilisés pour transporter du pétrole, du gaz et/ou des produits raffinés dérivés de ceux-ci, comprend un véhicule (14) possédant un moteur (16) servant à l'entraînement du véhicule (14), au moins une tête de vaporisation (18) destinée à produire un jet d'eau (20), ainsi qu'une pompe automobile (22) destinée à fournir de l'eau sous pression à la tête de vaporisation (18). Ce système comprend en outre des moyens d'alimentation en eau de la pompe (22). Le procédé de nettoyage comprend les étapes consistant à placer le véhicule (14) dans le pipeline (8), à fournir de l'énergie au moteur (16) du véhicule (14) afin que celui-ci (14) puisse circuler à travers le pipeline (8), et à fournir de l'eau et de l'énergie à la pompe automobile (22), de façon que la tête de vaporisation (18) vaporise de l'eau contre au moins une partie de la paroi intérieure du pipeline (8), aux fins de nettoyage de cette paroi.
PCT/NL1997/000477 1996-08-22 1997-08-22 Procedes d'inspection et de nettoyage de pipelines et appareil servant a mettre en oeuvre ces procedes Ceased WO1998007532A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1003857 1996-08-22
NL1003857A NL1003857C1 (nl) 1996-08-22 1996-08-22 Werkwijze voor het inspecteren van pijpleidingen, voor het reinigen van pijpleidingen en een inrichting voor het uitvoeren van dergelijke werkwijzen.

Publications (1)

Publication Number Publication Date
WO1998007532A1 true WO1998007532A1 (fr) 1998-02-26

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1997/000477 Ceased WO1998007532A1 (fr) 1996-08-22 1997-08-22 Procedes d'inspection et de nettoyage de pipelines et appareil servant a mettre en oeuvre ces procedes

Country Status (2)

Country Link
NL (1) NL1003857C1 (fr)
WO (1) WO1998007532A1 (fr)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006312A1 (fr) * 1998-07-27 2000-02-10 Mac & Mac Hydrodemolition Inc. Appareil de nettoyage par pulverisation des parois internes d'une canalisation d'alimentation
US6418947B1 (en) 1998-07-30 2002-07-16 Mac & Mac Hydrodemolition, Inc. Scarifier for interior surface of pipeline
US6550486B2 (en) 1998-07-30 2003-04-22 Mac & Mac Hydrodemolition, Inc. Apparatus for scarifying the interior surface of a pipeline
US7128074B2 (en) 1998-07-30 2006-10-31 Mac & Mac Hydrodemolition, Inc. Scarifier for the interior surface of a pipeline
NO20161372A1 (en) * 2016-08-29 2018-03-01 Pipetech Int As Cleaning system for cleaning a subsea manifold by use of water, and method for using said cleaning system
CN108687070A (zh) * 2018-04-25 2018-10-23 榆林学院 一种在役石油管道内壁除蜡智能小车
CN110201952A (zh) * 2019-04-30 2019-09-06 国网山东省电力公司临沂供电公司 电力电缆管道清扫器
WO2020082149A1 (fr) * 2018-10-26 2020-04-30 Petróleo Brasileiro S.A. - Petrobras Système d'intervention à traction comprenant un ombilical
US12285785B1 (en) * 2024-03-06 2025-04-29 China Construction Industrial & Energy Engineering Group Huanghe Construction Co., Ltd. Pipeline overturning lining inner wall cleaner

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887118A (en) * 1955-02-02 1959-05-19 Thornhill Craver Company Inc Pipe cleaning devices
FR1197088A (fr) * 1957-01-04 1959-11-27 Appareil pour effectuer le goudronnage et le nettoyage des parois intérieures des conduites d'alimentation en eau
US3267504A (en) * 1964-06-01 1966-08-23 C W Fuelling Inc Pipe cleaning apparatus
FR2381657A1 (fr) * 1977-02-24 1978-09-22 Commissariat Energie Atomique Vehicule autopropulse a bras articules
GB2122713A (en) * 1982-06-28 1984-01-18 Mannesmann Ag Apparatus for working on the interior of pipes

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2887118A (en) * 1955-02-02 1959-05-19 Thornhill Craver Company Inc Pipe cleaning devices
FR1197088A (fr) * 1957-01-04 1959-11-27 Appareil pour effectuer le goudronnage et le nettoyage des parois intérieures des conduites d'alimentation en eau
US3267504A (en) * 1964-06-01 1966-08-23 C W Fuelling Inc Pipe cleaning apparatus
FR2381657A1 (fr) * 1977-02-24 1978-09-22 Commissariat Energie Atomique Vehicule autopropulse a bras articules
GB2122713A (en) * 1982-06-28 1984-01-18 Mannesmann Ag Apparatus for working on the interior of pipes

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ROMAN: "Robotic applications in PSE&G's nuclear and fossil power plants", IEEE TRANSACTIONS ON ENERGY CONVERSION., vol. 8, no. 3, September 1993 (1993-09-01), NEW YORK US, pages 584 - 592, XP000416605 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000006312A1 (fr) * 1998-07-27 2000-02-10 Mac & Mac Hydrodemolition Inc. Appareil de nettoyage par pulverisation des parois internes d'une canalisation d'alimentation
US6206016B1 (en) 1998-07-27 2001-03-27 Mac & Mac Hydrodemolition Inc. Spray cleaner for interior surface of pipeline
US6418947B1 (en) 1998-07-30 2002-07-16 Mac & Mac Hydrodemolition, Inc. Scarifier for interior surface of pipeline
US6550486B2 (en) 1998-07-30 2003-04-22 Mac & Mac Hydrodemolition, Inc. Apparatus for scarifying the interior surface of a pipeline
US7128074B2 (en) 1998-07-30 2006-10-31 Mac & Mac Hydrodemolition, Inc. Scarifier for the interior surface of a pipeline
USRE44518E1 (en) 1998-07-30 2013-10-08 Mac & Mac Hydrodemolition Inc. Method of scarifying an interior surface of a pipeline
NO342314B1 (en) * 2016-08-29 2018-05-07 Pipetech Int As Cleaning system for cleaning a subsea manifold by use of water, and method for using said cleaning system
WO2018044175A1 (fr) * 2016-08-29 2018-03-08 Pipetech International As Nettoyage de l'intérieur de structures sous-marines
NO20161372A1 (en) * 2016-08-29 2018-03-01 Pipetech Int As Cleaning system for cleaning a subsea manifold by use of water, and method for using said cleaning system
CN108687070A (zh) * 2018-04-25 2018-10-23 榆林学院 一种在役石油管道内壁除蜡智能小车
WO2020082149A1 (fr) * 2018-10-26 2020-04-30 Petróleo Brasileiro S.A. - Petrobras Système d'intervention à traction comprenant un ombilical
CN113825939A (zh) * 2018-10-26 2021-12-21 巴西石油公司 包括脐带件的介入式驱动系统
CN113825939B (zh) * 2018-10-26 2023-09-15 巴西石油公司 包括脐带件的介入式驱动系统
US11920722B2 (en) 2018-10-26 2024-03-05 Petróleo Brasileiro S.A.—Petrobras Intervention drive system comprising an umbilical
CN110201952A (zh) * 2019-04-30 2019-09-06 国网山东省电力公司临沂供电公司 电力电缆管道清扫器
US12285785B1 (en) * 2024-03-06 2025-04-29 China Construction Industrial & Energy Engineering Group Huanghe Construction Co., Ltd. Pipeline overturning lining inner wall cleaner

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