Presentation on theme: "PORTABLE TEMPORARY PIG LAUNCHER thomas cornthwaite"— Presentation transcript:
1 PORTABLE TEMPORARY PIG LAUNCHER thomas cornthwaite Presentation of paper by Thomas Cornthwaite, International Pipeline Products Limited, Catterick UKthomas cornthwaiteinpipe products limited
2 THE SITUATION pipeline pigging afterthought pipeline design there are many occasions when pig launching can be difficult.Initially pig launchers might not be placed in ideal locations along the pipelinespace is limited and conditions are not conducive to the fitting of a standard launcher.Retrofitting pig launching equipment can also be extremely costly, particularly if the number of launches required are relatively few.Temp launchers not common productsTHE SITUATION
3 PTPL portable temporary pig launcher – inpipe products IPP solution that allows straightforward, temporary and cost effective pig launching and receiving for low pressure functions.cost effective - NOT pipe I/D but a pipe O/D,O/D usually constantportable temporary pig launcher – inpipe productsmore flexible and cost effective temporary pig launching
4 Pipeline design and technology has not always been able to keep up with demand. Tight timescales determined by market demands have in many cases caused consideration to pipeline pigging to be an afterthought.Also with the process of pipeline pigging is still somewhat of a black art that many are not entirely familiar with, the general quality of pipeline design for pigging can at times lack the forward thinking required.Pipeline design and technology has not always been able to keep up with demand.Tight timescales = afterthought.pipeline pigging = black art, general quality is poorINTRODUCTION
5 THE PROBLEM permanent launchers are, costly very specific to purpose difficult to add to live linesideal for regular usecostly and difficult to add to existing, live pipelines.hot work required precision of manufacturing the launchercost of installation high, which does little to encourage installation.
6 THE PROBLEM A high pressure plug is not ideal for launching: it has no reducerit has no doorthere is potential for internal damageit is difficult to vent and drainbut it is cost effectiveLaunchers = similarMPL? Little adaptabilityhigh pressure plug can be used without a full launching system.No reducer= difficult to loadvice-jaw damageIntended additional launcher assembly on existing lines may also incur hot workTHE PROBLEM
7 THE SOLUTION: PTPL features of the PTPL pressure based fixing re-usable launchercost effectivefast installationadaptable productstandardised along pipelineIPP Catterick UK have developed an alternative launching systemawkward situations where pigging is required but difficult to carry out.The Portable Temporary Pig Launcher (PTPL) as it is known does this by utilising a pressure dependant fixing, rather than a fixed mechanical system such as a pair of flanges or a welded closure
8 PTPL has opening, pig area, reducer, kicker line and vent line. Posi seal is patented, loads of benefitsPTPL ANATOMY
9 POSI-SEAL ASSEMBLY pressure gauge retaining flange grit lined tyre – for grippingribbed tyre – for sealingsealing flangepositive-seal system = tyres that sit within a housing and have a greater I/D than the O/D of the intended pipeline.up to 25 bar of internal pressure.Sealed, pig loaded, kicker line
10 ASSEMBLY pig passage indicator posi-seal assembly reducer door (blind flange)provision has been made to vent the trap before launching.can also be received in the same waysame process that operators are already familiar with.pig holding areadrain line outkicker line inASSEMBLY
11 BENEFITS Design to pipe outside diameter + More useful along pipeline + Standardisation of components+ More likely to be reliable+ More cost effectiveAdvantageslauncher to suit a particular I/D rather to fit the O/D = standardised.Easier for manufacturerless partsgreater reliabilityBENEFITS
12 TYRE BENEFITS + greater tolerance range + better on corroded/damaged pipes+ quick and simple to fitflexibility is alloweda greater tolerance to the pipe O/D is permissible.Corrosion/damagedtime required to install the PTPLTYRE BENEFITS
13 MAINTENANCE + access to either end for cleaning + closure door optional+ ease of pre-loadingeasier to maintain and cleanA closure door is optional with this product - health and safety issues – blind flange is time consuming?.pre-loaded, benefit little provision to the pig handling area
14 UNOBTRUSIVE The PTPL is an unobtrusive launcher reduce the cost of line alteration by removing the necessity for a permanent pig trap, reducer and closure.no damage is done to the pipeline.potential applications when pigging during construction of a pipeline, no permanent pig stationsophisticated design = quicker to install on lines than other temporary devicesquicker to uninstall and reuse elsewhereUNOBTRUSIVE
15 CASE STUDYdeveloped in answer to a customer scenario where a pig had to be launched into an open ended pipe under a platform where no hot work could commence.new pipeline between platforms in Norwegian sector following a leakage in an existing line.This meant that oil production had to be routed through another pipeline.Upon completion it was the intention of the operators to pig and hydrotest the line from riser end to riser end.The risers had been previously cut to avoid modifications during a layout reconstruction.Initially it was the intention of the client that a pair of plugs would be used to pig and hydrotest the line, one internal and one external.The location of the riser end on one platform was another consideration as it was located beneath the platform and difficult to reach, rendering significant installation work undesirable.PTPL developed for pigging a new line in the Norwegian North Sea
16 SPECIFICSThe concept of an external plug using the posi-seals had been suggested at InPipe previouslybut the concept leant itself to pig launching given the low pressures requiredease of application, the client chose InPipe and the concept put forward.situation of temporary pig launcher below platform
17 TESTINGpreviously used on internal testers,testing for proof of concept was crucial.Initial sealing test before full testfull test - tyres were actually more effective than on an internal tester application,customer requirement approximately 5/6 barmaximum pressure of 25 bar achieved in testing.Testing to prove external posi-seal tyre, tested successfully to 25 bar
18 PTPL specifically supplied with: clamppair of safety harnesseswater pump for energisingpair of ribbed tyrespair of grit lined tyressupplied with a clamp and a pair of safety harnesses to meet customer safety requirementsposi-seals were energised by a water pump.ribbed tyres for sealing sandwiched between a pair of gritted tyres for grip.Pigging sucessfully completedpigging on construction of new norwegian line successfully completed using ptpl
19 SUITABILITY Permanent launcher PTPL + day to day use + regular pigging+ hydrostatic testingPTPL+ occasional pigging+ awkward circumstances+ pigging during pipeline constructionA PTPL is extremely practicalstandard pig launcher/receiver system is still preferential.Temp launchers have a need.consideration to application of the pipeline and the constituent material that is used therein.a standard launcher is better for pigging regularly + high pressures of day to day use and hydrostatic testing.
20 SUITABILITY Provision to avoid tyre slippage Not a replacement for a permanent launcherWhilst useful on corroded pipes, caution to breakageNot to be pigged with gas/airmain concern = tyre slippage or failurenot designed to be a replacement for a standard, permanent launcher/receiverdesigned to meet a customer specification in a low pressure setting.made clear to customers when ordering or using a PTPL.Supplementary safety systems - mechanical fixing such as a harness and clamp.design could be altered for vice jaw mechanismcareful and considered use = VJ unnecessary.Whilst it was pointed out that the device could be useful on lines that have corroded, caution should be given to badly corroded lines where the additional stress of energising the tyres on the line may cause line failure.SUITABILITY
21 ACCUMULATION PTPL should not be used to receive in single, heavy runs A strategy using low efficiency pigs should be used if this could be an issueACCUMULATIONused as part of a regular and controlled pigging program, the loads not be too severe.receiver accumulation of wax or debris Care so not excessively demanding of the PTPL.Excessive build up = loading/unloading issues.use of a series of low-efficiency pigs or bypass pigs to reduce volume is the most straightforward strategy
22 OTHER CONSIDERATIONS 25 bar maximum pressure Access consideration for cranes and loadingConsideration in case of being overloadedSuitability for use in other applicationsIncorporation of safety equipmentnot be used in pipelines over 25 bar. over 25 bar there could be safety issues.overall space requirement and the potential need for access of cranes or lifting equipment.The device is heavy and thus it is essential to ensure that the site is appropriate before installation.OTHER CONSIDERATIONS
23 TECHNOLOGY APPLICATIONS External tyre system benefits pipeline maintenanceStandardisation of parts lowers costsLarger tolerance band when using tyres.external tyre system benefits pipeline maintenance,standardised O/D,larger tolerance band for factors such as corrosion.potentially save manufacturers standardisation reliabilitywider tolerance band. The unobtrusive nature can also be applicable in a range of applications.
24 TYRE APPLICATIONS + isolation + repair + testing + plugging + standardised design+ cost saving+ reliabilityisolation and repair, hydrostatic testing, plugging.room for developmentallows the pipeline pigger to consider different types of launchergreater flexibility in pipeline design.‘Blank’ stations could potentially be added at reduced costPTPL is required to launch the pigs from any of these stations.
25 ADAPTABILITY + launcher adaptability + blank stations + compact launching+ offline modification+ multiple pig/sphere launchingadapted to suit the purpose of the job.More compact launching systems could be built in for pipes that are awkward to reach.potential to incorporate multiple pig launching applications (not high demand given the temporary nature of the product)ADAPTABILITY
26 SUMMARY customer brief leads to product with many derived benefits There are many avenues for development for pipeline pigging products; in this case a customer driven brief has allowed a company to develop a product which has many derived benefits as a result of its function.By using externally acting tyres, the PTPL is more standardised, more cost effective, quicker to install and uninstall, suitable for areas where hot work can not be done and is more adaptable for the customer.In general the PTPL is an interesting product in that it offers pipeline users an alternative solution in pipeline launching and receiving.SUMMARYcustomer brief leads to product with many derived benefitsthe ptpl provides an alternative solution to pig launching and receiving