Tittel. Increased performance and safety by means of subsea instrumentation. av Navn. Olav Brakstad ClampOn AS

Transcription

1 Tittel Increased perfrmance and safety by means f subsea instrumentatin Olav Brakstad ClampOn AS av Navn

2 Agenda Intrductin Integrity/cnditin mnitring Crrsin/ersin Vibratin

3 Intrductin Industry fcus n safety and integrity Subsea requirements Mre infrmatin Reliability Lng lifetime ClampOn Sand mnitring experts Wide range f ultrasnic instruments and capacities

4 One technlgy, different applicatins Sand Mnitr PIG detectr Leak Mnitr Well Cllisin Detectr Cracking detectr Wall Thickness Mnitr Crrsin Under Insulatin Vibratin Mnitr Crrsin-Ersin Mnitr

5 Crrsin-ersin mnitring

6 Subsea crrsin & ersin Integrity damage Prductin stp Expensive Spill Pllutin Majr prblems Backgrund

7 Crrsin Backgrund Cause; sur gas/cndensate Effect; lss f integrity Remedy; anti crrsin agents Ersin Cause; Sand prductin Effect; lss f integrity Remedy; reduce sand prductin

8 Cntinuus mnitring Maintaining system integrity N lss f cntainment Avid safety hazards N envirnmental damage Maintain uptime Minimize inspectin &repair csts

9 ClampOn Crrsin-Ersin Mnitr AKA: Cntinuus area wall thickness mnitring

10 What is it? Permanent active acustic, nn intrusive wall thickness mnitring system

11 What des it prvide? Cntinuus mnitring f changes in wall thickness n a defined pipe sectin

12 - Guided waves Hw des it wrk? - Change in WT -> change in signal shape

13 Why guided waves? Limited spt cverage Cnventinal manual gauge Guided wave transducer rings Full vlume cverage

14 CEM Cverage Area w/gwt Guided wave prpagatin in pipe structures is cmplicated by the presence f wave-paths that wrap arund the structure. In the case f a circular cylinder the paths are helixes Helical signal paths Direct signal path 5 Signal Paths per transducer Signal Paths: Direct Helical Clckwise Helical Cunter clckwise Duble Helical Clckwise Duble Helical Cunter clckwise

15 % f wall thickness Recnstructed wall thickness lss map The recnstructed maximum depth is in excellent agreement with the max depth estimatin frm ultrasnic spt measurements at 20MHz which yielded mm Maximum Depth 0.79 mm mm Sftware GUI. CrrPRINT

16 Tmgraphy Results w/edm Defect #1 EDM = Electrical Discharge Machining A cpper electrde was machined t pipe surface shape and we erded ut in 12 different steps with increasing steps f 20um, 40um etc steps Defect #12

17 EDM Ersin Slt with il & cpper 115mm wide Transducer set-up 535mm 315mm 220mm mm 115mm

18 Result 2D-view Axial psitin [mm] Wall Thickness Lss [%] Defect # Maximum Crrsin Depth mm Circumferential psitin [mm] 0

19 Result 2D-view Axial psitin [mm] Wall Thickness Lss [%] Defect # Maximum Crrsin Depth 0.41 mm Circumferential psitin [mm] 0

20 Result 2D-view Axial psitin [mm] Wall Thickness Lss [%] Defect # Maximum Crrsin Depth 0.95 mm Circumferential psitin [mm] 0

21 Result 3D-view Defect #12

22 3 main alternatives - CEM fr ROV installatin - CEM nn-rov - CEM w/ ROV electrnics CEM Subsea

23 Retrfit/Brwnfield Fully ROV installable Battery pwered Wireless cmms

24 nn-rov Nn-ROV retrievable electrnics

25 Preinstalled ROV electrnics Transducers under insulatin ROV retrievable electrnics

26 System cmpnents: ROV CEM electrnics Wet-mate cnnectrs Transducers

27 Technical data Pipe uter diameter (OD): min 4 (100mm) Pipe wall thickness (WT): 2 mm t 35 mm (0,08 t 1,38 ) Distance between transducers: 0.15 m 2 m (78 ) typical Temperature : -40 t 180 C (-40 t 356 F) Pwer cnsumptin: Max 2.5 Watt Sensitivity: better than 1% f the pipe wall thickness (typical 0.1%) Repeatability: 0.04% Operatin life: hurs Frequency range: 30 t 300 khz Pwer Cnsumptin: Avg 6 Watt Max 10 Watt (during peratin) Sensr electrnics: DSP 66-MIPS, A/D cn. 24bit, 25-Years Water depth: 3000 Meters Test pressure: 345 BarA

28 Case example BP - GOM Applicatin: crrsin Type: standalne Standalne, battery pwered, nbard data strage, acustic cms by Snardyne mdem, fully retrfitted

29 Case example Ttal Laggan - Trmre Applicatin: Ersin Type: Integrated Integrated Nn retrievable cnfiguratin, ersin mnitring

30 Statil Mikkel Åsgard & SVAN Applicatin: ersin Type: standalne QTY: 12 Case example Fully integrated, frequent measurement trugh bend

31 Murphy - Kikeh Applicatin: crrsin Type: integrated Case example Integrated, cnnected t subsea cntrls.

32 Burullus WDDM Ph 9a Applicatin: crrsin Type: standalne QTY: 8 Case example Standalne, battery pwered, nbard data strage

33 Case example Ttal - Edradur Applicatin: crrsin Type: standalne QTY: 1 Standalne, battery pwered, nbard data strage. Installed n pipeline prir t reel ut 180 deg pivt

34 Case example Ttal - Edradur Applicatin: crrsin Type: standalne QTY: 1 Mechanical interface testing, pivting

35 Vibratin mnitring

36 Tpside causes f pipewrk failure Backgrund

37 Mdes f vibratin - subsea VIV Vrtex Induced Vibratin Lw frequency 0,01-2Hz FIV Flw Induced Vibratin Medium frequency 2-50Hz FLIP Flw Line Induced Vibratin High frequency Hz Pumps, cmpressrs etc.

38 Wrking principle MEMS accelermeter Acceleratin in three dimensins Digital Signal Prcessr (DSP) Numerical integratin Cnvert acceleratin t velcity r displacement

39 Data prcessing ClampOn vibratin mnitrs Accelermeter Analg lwpass filter Analg t digital cnversin Digital decimatin Anti-aliasing RMS calculatin Unit cnversin FFT spectrum analysis RMS utput Spectrum utput Raw data utput

40 Integrated/permanent slutin Real-time data Instant alarm Always present Data frm 0-day Fatigue estimate N running csts SIIS L2 and 3

41 Integrated/permanent slutin Prs: Cns: Real-time data Limited bandwidth (SIS L2 & RTU) Always present Difficult t retrfit N running cst ASVD Maximum Vibratin [g] X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z X Y Z 0-0,25 Hz 0,25-0,5 Hz 0,5-1 Hz 1-2 Hz 2-8 Hz 4-8 Hz 8-16 Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz Hz

42 Temprary / inspectin Stand-alne N integratin Internal battery 6 mnth peratin per charge Lcal indicatin Light weight Mechanical and magnetic fixtures N bandwidth restrictins Cntinuus raw data lgging

43 Temprary / inspectin USB interface Flash drive mde Internal prcessing

44 Analysis f vibratin data Precise analysis based n spectra r raw data typically perfrmed by a third party Simplistic apprach: RMS Velcity is apprximately prprtinal t fatigue. Rules f thumb apply.

45 Field Case Statil Visund Nrd Ptential risk f Vibratin n flex lp

46 Field Case Statil Visund Nrd

47 Field Case Statil Visund Nrd

48 Field Case Statil Visund Nrd

49 Field Case - BP - Azerbaijan Flw back ESD Valve - Flw cnditins creates vibratin - why - Can it be mnitred and bandwidth - Type f munting fixture? - Installatin lcatins Scenari Valve in vibratin Hw ften and amplitude Under what peratin cnditins Valve WILL wear ut in wrst case stp the prductin frm the platfrm

50 Valve flapping mvement

51 Field Case Statil - Skuld Flex lp vibratins - Calibrate calculatin mdel - Find maximum safe flw rate - Direct cable cmmunicatin

52

53 Cnclusins Online mnitring f crrsin/ersin; Greater cntrl Increased uptime Reduced risk Vibratin mnitring; Cmplement vibratin mdelling Actual situatin reprt Online/permanent Standalne/inspectin

54 Questins? Olav Brakstad ClampOn