CA2054231A1 - Pipeline monitoring and leak containment system - Google Patents

Pipeline monitoring and leak containment system

Info

Publication number
CA2054231A1
CA2054231A1 CA002054231A CA2054231A CA2054231A1 CA 2054231 A1 CA2054231 A1 CA 2054231A1 CA 002054231 A CA002054231 A CA 002054231A CA 2054231 A CA2054231 A CA 2054231A CA 2054231 A1 CA2054231 A1 CA 2054231A1
Authority
CA
Canada
Prior art keywords
passageway
groove
outer pipe
pipeline monitoring
leak detection
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
Application number
CA002054231A
Other languages
French (fr)
Other versions
CA2054231C (en
Inventor
Max Jerry Roach
John A. Whitehead
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2054231A1 publication Critical patent/CA2054231A1/en
Application granted granted Critical
Publication of CA2054231C publication Critical patent/CA2054231C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings
    • F16L58/04—Coatings characterised by the materials used
    • F16L58/10—Coatings characterised by the materials used by rubber or plastics
    • F16L58/1009—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe
    • F16L58/1036—Coatings characterised by the materials used by rubber or plastics the coating being placed inside the pipe the coating being a preformed pipe
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
    • G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
    • G01M3/283—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes for double-walled pipes

Abstract

This application discloses a pipeline monitoring system comprising at least one lined pipe section. This lined pipe section comprises an outer pipe having an exterior wall, a thermoplastic liner having an exterior surface flush with and in tight engagement with the interior wall of the outer pipe, and at least one groove located in the exterior surface. The groove and the interior wall of the outer pipe define at least one passageway. The system may include leak detection means communicating with the passageway and comprising a vacuum pump and control means for monitoring significant fluctuations in the vacuum in the passageway. In another embodiment, the leak detection means may comprise a light-transmitting cable disposed along the groove and means for detecting changes in the intensity of light carried by the cable.
CA002054231A 1990-06-04 1991-10-25 Pipeline monitoring and leak containment system Expired - Fee Related CA2054231C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/532,561 US5072622A (en) 1990-06-04 1990-06-04 Pipeline monitoring and leak containment system and apparatus therefor

Publications (2)

Publication Number Publication Date
CA2054231A1 true CA2054231A1 (en) 1993-04-26
CA2054231C CA2054231C (en) 2004-06-08

Family

ID=24122293

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002054231A Expired - Fee Related CA2054231C (en) 1990-06-04 1991-10-25 Pipeline monitoring and leak containment system

Country Status (3)

Country Link
US (1) US5072622A (en)
CA (1) CA2054231C (en)
GB (1) GB2262321B (en)

Families Citing this family (101)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69302469T2 (en) * 1992-03-06 1996-11-28 Teetotum Ltd Plastic injection molding machine with leak detector and system for it
JP2544888B2 (en) * 1993-07-28 1996-10-16 株式会社湘南合成樹脂製作所 Inspection method for pipe lining materials
US5390532A (en) * 1993-10-18 1995-02-21 Anthony; Mark Test apparatus for a fluid dispensing system
US5551484A (en) * 1994-08-19 1996-09-03 Charboneau; Kenneth R. Pipe liner and monitoring system
DE4431367C2 (en) * 1994-08-27 2000-11-30 Bernd Brandes Method for monitoring the tightness of pipelines, in particular sewage systems, and a device for carrying out the method
US8678042B2 (en) 1995-09-28 2014-03-25 Fiberspar Corporation Composite spoolable tube
US5921285A (en) 1995-09-28 1999-07-13 Fiberspar Spoolable Products, Inc. Composite spoolable tube
US6315497B1 (en) 1995-12-29 2001-11-13 Shell Oil Company Joint for applying current across a pipe-in-pipe system
US6264401B1 (en) 1995-12-29 2001-07-24 Shell Oil Company Method for enhancing the flow of heavy crudes through subsea pipelines
US6142707A (en) * 1996-03-26 2000-11-07 Shell Oil Company Direct electric pipeline heating
US6179523B1 (en) 1995-12-29 2001-01-30 Shell Oil Company Method for pipeline installation
US6171025B1 (en) * 1995-12-29 2001-01-09 Shell Oil Company Method for pipeline leak detection
GB2312047B (en) * 1996-04-11 2000-07-05 Schlumberger Ltd Improved pipework
US6067844A (en) * 1997-08-15 2000-05-30 Shell Oil Company Nondestructive method for detection of defects and the condition of liners in polymer-lined pipes and equipment
US6939521B1 (en) * 1997-11-21 2005-09-06 Honeywell International Inc. Fluoropolymer reactor with heat exchange jacket
US6220079B1 (en) 1998-07-22 2001-04-24 Safety Liner Systems, L.L.C. Annular fluid manipulation in lined tubular systems
US6634388B1 (en) * 1998-07-22 2003-10-21 Safetyliner Systems, Llc Annular fluid manipulation in lined tubular systems
AU5330299A (en) 1998-07-29 2000-02-21 Safetyliner Systems, Llc Insertion of liners into host tubulars by fluid injection
EP1345754A4 (en) * 2000-06-09 2006-04-19 Fiberliner Networks Method and apparatus for lining a conduit
GB0020011D0 (en) * 2000-08-15 2000-10-04 Bg Intellectual Pty Ltd Method for lining a pipe or main
DE10117329A1 (en) * 2001-04-06 2002-10-10 Linde Ag Pipe rupture protection for a vacuum-insulated filling line
GB2391600B (en) 2001-04-27 2005-09-21 Fiberspar Corp Buoyancy control systems for tubes
US6774814B2 (en) 2001-06-22 2004-08-10 Network Technologies Group, Llc Pipe-to-soil testing apparatus and methods
US20030037596A1 (en) * 2001-06-28 2003-02-27 Sorensen Peter K. Leakage detection system for gas pipelines
US6814146B2 (en) * 2001-07-20 2004-11-09 Shell Oil Company Annulus for electrically heated pipe-in-pipe subsea pipeline
US6714018B2 (en) 2001-07-20 2004-03-30 Shell Oil Company Method of commissioning and operating an electrically heated pipe-in-pipe subsea pipeline
US6739803B2 (en) 2001-07-20 2004-05-25 Shell Oil Company Method of installation of electrically heated pipe-in-pipe subsea pipeline
US6686745B2 (en) 2001-07-20 2004-02-03 Shell Oil Company Apparatus and method for electrical testing of electrically heated pipe-in-pipe pipeline
GB2377979B (en) * 2001-07-24 2005-06-15 Petrotechnik Ltd Improved pipe
GB0203638D0 (en) * 2002-02-15 2002-04-03 Lattice Intellectual Property Method for lining a pipe or main
US6789584B2 (en) 2002-03-26 2004-09-14 Charles B. Linam Fluid containment apparatus
US20030217588A1 (en) * 2002-05-23 2003-11-27 Marc Jalbert Handheld device for intrusive and non-intrusive field measurements of air permeability of soil
ITTO20020503A1 (en) * 2002-06-14 2003-12-15 Vincenzo Varriale METHOD FOR THE PRODUCTION OF A MULTILAYER SEAL AND MULTILAYER SEAL SO OBTAINED
US6688900B2 (en) 2002-06-25 2004-02-10 Shell Oil Company Insulating joint for electrically heated pipeline
US6937030B2 (en) * 2002-11-08 2005-08-30 Shell Oil Company Testing electrical integrity of electrically heated subsea pipelines
US20040112593A1 (en) * 2002-12-17 2004-06-17 Mcgregor Ronald W. Hydraulic circuit construction in downhole tools
US6915851B2 (en) * 2003-01-22 2005-07-12 Enerline Technologies, Inc. Apparatus and method for lining a downhole casing
US6826957B2 (en) * 2003-03-07 2004-12-07 General Motors Corporation Self-contained portable air pressure decay test apparatus
FR2858841B1 (en) † 2003-08-14 2007-02-09 Technip France METHOD OF DRAINING AND EXHAUSTING GAS FROM PERMEATION OF A FLEXIBLE TUBULAR DRIVE AND CONDUCT SUITABLE FOR ITS IMPLEMENTATION
US6962434B2 (en) * 2003-09-25 2005-11-08 Kerr-Mcgee Chemical, Llc Liner wear detection
US6889538B2 (en) * 2003-10-02 2005-05-10 Varco I/P, Inc. Monitoring system for leak prevention and detection
CA2449155A1 (en) * 2003-12-03 2005-06-03 1058095 Alberta Ltd. Method of installing a fibreglass pipeline
CN100357721C (en) * 2004-01-19 2007-12-26 徐州建筑职业技术学院 Middle pressure test technology and device for widebore pipeline construction
US20070151055A1 (en) 2006-01-04 2007-07-05 766089 Alberta Ltd. Pipeline pig brush and brush assembly
DE202004018084U1 (en) * 2004-11-22 2005-02-03 Schulte, Joachim Heat exchanger for heat recovery in waste ducts has a flexible mat with integral ducts laid into a waste duct without creating flow retarding step profiles
US20060151042A1 (en) * 2005-01-12 2006-07-13 Stringfellow William D Pipe liner
US7374127B2 (en) * 2005-01-12 2008-05-20 Smart Pipe Company, Inc. Systems and methods for making pipe liners
CA2589973C (en) 2004-12-13 2014-02-04 Smart Pipe Company, Lp Systems and methods for making pipe liners
US8567448B2 (en) * 2007-12-26 2013-10-29 Smart Pipe Company, Inc. Methods and systems for in situ pipe lining
US8567450B2 (en) 2005-01-12 2013-10-29 Smart Pipe Company Lp Methods and systems for in situ manufacture and installation of non-metallic high pressure pipe and pipe liners
EP1698879A1 (en) * 2005-01-21 2006-09-06 Omer, Bndean Abdulkadir An automatic leak detection and isolation system for a pipeline
US8235628B2 (en) * 2005-03-17 2012-08-07 Kellogg Brown & Root Llc Continuously pressurized pipeline
US8839822B2 (en) * 2006-03-22 2014-09-23 National Oilwell Varco, L.P. Dual containment systems, methods and kits
CA2641492C (en) 2007-10-23 2016-07-05 Fiberspar Corporation Heated pipe and methods of transporting viscous fluid
US9453606B2 (en) * 2007-12-26 2016-09-27 Smart Pipe Company, Inc. Movable factory for simultaneous mobile field manufacturing and installation of non-metallic pipe
US20110153225A1 (en) * 2008-01-25 2011-06-23 Schlumberger Technology Corporation In-line composition and volumetric analysis of vent gases and flooding of the annular space of flexible pipe
US20100154153A1 (en) * 2008-12-24 2010-06-24 766089 Alberta Ltd. Pipeline pig brush
US9127546B2 (en) 2009-01-23 2015-09-08 Fiberspar Coproation Downhole fluid separation
US20100212858A1 (en) * 2009-02-26 2010-08-26 David Guth Geothermal Cooling System for an Energy-Producing Plant
US9310014B2 (en) 2009-12-07 2016-04-12 Smart Pipe Company L.P. Systems and methods for making pipe, and method of installing the pipe in a pipeline
US8955599B2 (en) 2009-12-15 2015-02-17 Fiberspar Corporation System and methods for removing fluids from a subterranean well
CA2783764C (en) 2009-12-15 2017-08-15 Fiberspar Corporation System and methods for removing fluids from a subterranean well
US8820143B2 (en) 2011-04-08 2014-09-02 Massachusetts Institute Of Technology Leak detection system
WO2013167889A2 (en) 2012-05-08 2013-11-14 Smart Pipe Company Inc. Movable factory for simultaneous mobile field manufacturing and installation of non-metallic pipe
US20130333447A1 (en) * 2012-06-15 2013-12-19 Thomas Arthur White Leakage detection
WO2014000760A1 (en) * 2012-06-25 2014-01-03 Statoil Petroleum As Arrangement for venting a riser annulus
WO2014026190A1 (en) 2012-08-10 2014-02-13 National Oilwell Varco, L.P. Composite coiled tubing connectors
US8967186B2 (en) * 2012-09-13 2015-03-03 Jeffrey Scott Adler Fluid spill containment, location, and real time notification device and system
AU2012390999B2 (en) * 2012-09-27 2016-08-11 Halliburton Energy Services, Inc. Well tool pressure testing
US9267635B2 (en) 2013-03-11 2016-02-23 Exxonmobil Upstream Research Company Pipeline liner monitoring system
CN103278379B (en) * 2013-04-18 2015-09-09 中国华冶科工集团有限公司 The special short tube of pressure testing and the using method in long-distance pipe pipe section pressure test thereof
ITFI20130179A1 (en) * 2013-08-01 2015-02-02 Stefano Gaspari A DEVICE TO PREVENT AND INTERCEPT GAS LOSSES
BR112017000249B1 (en) * 2014-07-08 2020-11-17 4Subsea As arrangement, and, method for determining free ring volume in a tube
CN104458427B (en) * 2014-12-05 2018-01-19 安徽水安建设集团股份有限公司 A kind of assembled duct test device
US9863234B2 (en) * 2014-12-18 2018-01-09 Baker Hughes, A Ge Company, Llc Method and system for pressure testing downhole tubular connections using a reference port
AU2016238178C1 (en) * 2015-03-26 2019-10-24 Dripdrone, Inc. Fluid leak detection methods, systems and apparatus
DE102015012301B4 (en) * 2015-09-23 2021-07-15 Pfeiffer Chemie-Armaturenbau Gmbh Channel system for a line component of a process engineering system, system for detecting a process medium leak and line component of the process engineering system
GB201518386D0 (en) * 2015-10-16 2015-12-02 Pioneer Lining Technology Ltd Monitoring of lined pipeline
WO2017139835A1 (en) * 2016-02-18 2017-08-24 Hatch Pty Ltd Wear liner and a method for combatting wear
US11072036B2 (en) 2016-12-29 2021-07-27 Spinduction Weld, Inc. Concentric welded pipes with condition monitoring capability and method of manufacture
CN111094688A (en) * 2017-05-30 2020-05-01 巴西石油公司 System and method for forced circulation of fluid through an annulus of a flexible pipe
JP6643393B2 (en) * 2018-05-01 2020-02-12 Ｋｙｂ株式会社 Fluid leak detection system and fluid pressure system
BR102018075029A2 (en) * 2018-12-03 2020-06-16 Petróleo Brasileiro S.A. - Petrobras SYSTEM AND METHOD FOR THE DETECTION OF ANAL SPACE SEALING IN FLEXIBLE DUCTS
US11879568B2 (en) 2019-01-04 2024-01-23 Canadian Pressure Control Inc. Pipeline-leak-containment apparatus
US11035749B2 (en) * 2019-02-07 2021-06-15 Georg Fischer, LLC Leak test system and method for thermoplastic piping
US11578710B2 (en) 2019-05-02 2023-02-14 Kerr Machine Co. Fracturing pump with in-line fluid end
US11105327B2 (en) 2019-05-14 2021-08-31 Halliburton Energy Services, Inc. Valve assembly for a fluid end with limited access
US11231111B2 (en) 2019-05-14 2022-01-25 Halliburton Energy Services, Inc. Pump valve seat with supplemental retention
US11261863B2 (en) 2019-05-14 2022-03-01 Halliburton Energy Services, Inc. Flexible manifold for reciprocating pump
US11441687B2 (en) 2019-05-14 2022-09-13 Halliburton Energy Services, Inc. Pump fluid end with positional indifference for maintenance
US11560888B2 (en) 2019-05-14 2023-01-24 Halliburton Energy Services, Inc. Easy change pump plunger
US11739748B2 (en) 2019-05-14 2023-08-29 Halliburton Energy Services, Inc. Pump fluid end with easy access suction valve
US10808846B1 (en) 2019-05-14 2020-10-20 Halliburton Energy Services, Inc. Pump plunger with wrench features
US10941766B2 (en) 2019-06-10 2021-03-09 Halliburton Energy Sendees, Inc. Multi-layer coating for plunger and/or packing sleeve
US11280326B2 (en) 2019-06-10 2022-03-22 Halliburton Energy Services, Inc. Pump fluid end with suction valve closure assist
US10808851B1 (en) 2019-06-10 2020-10-20 Halliburton Energy Services, Inc. Multi-material frac valve poppet
US10677380B1 (en) * 2019-07-26 2020-06-09 Halliburton Energy Services, Inc. Fail safe suction hose for significantly moving suction port
US10989188B2 (en) 2019-07-26 2021-04-27 Halliburton Energy Services, Inc. Oil field pumps with reduced maintenance
MX2021007549A (en) 2020-06-18 2021-12-20 United Pipeline Systems Inc System and method for installing pipe liners.
US11060943B1 (en) * 2020-10-22 2021-07-13 Trinity Bay Equipment Holdings, LLC Poly welded annulus test head systems and methods
FR3130925B1 (en) * 2021-12-17 2023-12-15 Saipem Sa Pipe for the transport of fluids with steel tube with protective liner provided with slots for the evacuation of gas accumulated under the liner

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1039515A (en) * 1962-07-24 1966-08-17 Power Aux Ies Ltd Improvements in or relating to flexible pressure tubes and ducts
US3184958A (en) * 1963-03-11 1965-05-25 Midwesco Enterprise Inc Conduit system
GB1054110A (en) * 1963-04-19
GB1086050A (en) * 1966-07-04 1967-10-04 Clinton Orrin Bunn Method and system for detecting and locating pipe line leakage
IT959618B (en) * 1971-08-21 1973-11-10 Felten U Guilleaume Ag FLEXIBLE TUBULAR CABLE
JPS5418404B2 (en) * 1973-01-25 1979-07-07
SE403564B (en) * 1976-02-11 1978-08-28 Electrolux Ab HOSE WITH ONE OR MORE ELECTRICAL CONDUCTORS
NL7904597A (en) * 1978-06-14 1979-12-18 Bridgestone Tire Co Ltd FLUID TRANSFER HOSE.
DE2856013C2 (en) * 1978-12-23 1985-03-14 Kernforschungsanlage Jülich GmbH, 5170 Jülich Inner wall structure of a prestressed concrete tank with gas leakage lines for liner leak detection
FR2455707A1 (en) * 1979-05-03 1980-11-28 Carbonisation Entr Ceram SUB-ASSEMBLY FOR THE DETECTION OF LEAKS OF A LIQUID METAL AND DETECTION DEVICE COMPRISING SEVERAL SUB-ASSEMBLIES OF THIS TYPE
US4446892A (en) * 1979-09-05 1984-05-08 Maxwell Ag Method and apparatus for monitoring lengths of hose
US4386269A (en) * 1979-11-15 1983-05-31 Avon Rubber Company Limited Method and device for detecting leaks from pipelines
FR2494848A1 (en) * 1980-11-24 1982-05-28 Technigaz METHOD AND DEVICE FOR DETECTION, REMOTELY, OF SEALING FAULTS OF A CONDUIT OF TRANSPORT OF A FLUID, IMMERED IN AN AMBIENT FLUID; TRANSPORT CONDUIT COMPRISING THIS DETECTION DEVICE AND METHOD OF CONSTRUCTING SUCH A CONDUCT
GB2138917B (en) * 1983-04-27 1986-09-17 Dunlop Ltd Flexible hose
US4644780A (en) * 1983-10-19 1987-02-24 Westinghouse Electric Corp. Self-supporting pipe rupture and whip restraint
US4651893A (en) * 1985-03-21 1987-03-24 Mooney Joseph R Liquid storage tank assembly
US4667505A (en) * 1985-05-08 1987-05-26 Sharp Bruce R Split fittings and pipeline systems using same
US4920786A (en) * 1989-05-08 1990-05-01 Danielson Ricky E Method of retrofitting existing fuel tanks

Also Published As

Publication number Publication date
GB2262321A (en) 1993-06-16
GB2262321B (en) 1995-01-25
CA2054231C (en) 2004-06-08
US5072622A (en) 1991-12-17
GB9125994D0 (en) 1992-02-05

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