RT-PTN-03.5 (Company Profile Nov 2011 Linkedin)
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Transcript of RT-PTN-03.5 (Company Profile Nov 2011 Linkedin)
RiserTec
RiserTec
Company Profile
Certificate No. 6161ISO 9001
RT-PTN-ADM-3.5 Slide No. 1HP Ti Drilling Riser – Heidrun TLP
Contents
Background to Company SoftwareSoftware Training Engineered ProductsEngineered Products Engineering Consultancy Example Projects Example Projects
Teal Guillemot Dynamic Umbilical
RT-PTN-ADM-3.5 Slide No. 2
w/ back-to back Bend StiffenersEither side of Clump Weight
RiserTec Background
Formed 2003
Riser, Pipeline, Mooring, Structural & HydrodynamicsIndependent Consultancy 10 Engineers Independent Consultancy, 10 Engineers
Offices in Aberdeen UK and Houston Texas
High Tech Problems/Solutions High Tech Problems/Solutions
ISO 9001 certified for engineering design & software
Sponsors: Huntly Nordic, Aberdeen Kidsafe, Aberdeen Orchestra p y , ,
RT-PTN-ADM-3.5 Slide No. 3
Jotun Turret System
RiserTec Background
Principals have over 70 years Combined Project Experience
Principals lead all Jobs
Complete SYSTEM Approach (Risers, Vessel, Moorings, Flowlines, Flow Assurance, Installation, Monitoring, Operation etc)etc)
RT-PTN-ADM-3.5 Slide No. 4
Strake VIV Testing
Technical Software
Orcaflex – Riser TD Analysis
ABAQUS – General Purpose FEA ABAQUS General Purpose FEA
SolidWorks – 2D/3D CAD & Solid modeling Simulation SolidWorks FEA (Linear & NL) Simulation – SolidWorks FEA (Linear & NL)
Shear7 – VIV Response Analysis
AQWA – Diffraction / Ship Dynamics
CWEAR – Riser & Casing Wear Analysis
R-Code – Fracture Mechanics Assessments
MathCad – General Purpose Technical Calculations
MATLAB – Mathematics Laboratory
RT-PTN-ADM-3.5 Slide No. 5
In-house Software 1
RTRiser FD 2D FD Riser Analysis (regular / random waves)
RTBeam Tensioned Beam Analysis
RTCode Riser & Pipeline Stress Checks to DNV & API
RTLife Rainflow Fatigue Analysis
RT5500 Buoyancy Tank Design & Optimisation to BS 5500
RTFracture Fracture Assessment to BS7910 & R6RTW W C l l ti (I t f d / ABAQUS) RTWear Wear Calculations (Interfaced w/ ABAQUS)
MAP FD/TD Riser & Mooring Analysis (Developed w/ CU)
Bend StiffenerDesign Using
RTBend4
6Displaced Shape
46.5
62Angle
) 0.225
0.3Curvature
/m)
0
2
4
Y (m
)
0
15.5
31
Ang
le (d
eg)
0
0.075
0.15C
urva
ture
(1/
RT-PTN-ADM-3.5 Slide No. 6
0 1.2 2.4 3.6 4.8 6
X (m)0 2 4 6 8
0
s (m)
0 2 4 6 80
s (m)
In-house Software 2
RTFrame 2D/3D Frame Analysis
RTLayout Riser Layout Utility (Catenary Calculations)
RTStress Stress Joint Profile Optimisation
RTContact Pipe-in-Pipe Contact Forces
RTCrossing Pipeline Crossing and Upheaval Buckling Analysis
RTVIV VIV Analysis (Interfaced w/ ABAQUS)
0.1 10
Stress JointDesign using
RTSt
0.06
0.08
ral D
efle
ctio
n (m
)
6
8
Stre
ss (M
Pa)
RTStress
0 5 10 15 20 25 300
0.02
0.04
Ris
er L
ater
0
2
4
Ben
ding
S
RT-PTN-ADM-3.5 Slide No. 7
NodesElements
Elevation Above Base Flange (m) 0 5 10 15 20 25 300
Elevation Above Base Flange (m)
Engineering Design - 40 Year Ago
Engineering Design Process
TheoryHand Calcs
PhysicalTestingHand Calcs Testing
RT-PTN-ADM-3.5 Slide No. 8
Today
Engineering Design Process
TheoryHand Calcs
VirtualTesting
PhysicalTestingHand Calcs
(MathCad)Testing
(FEA/CFD)Testing
RT-PTN-ADM-3.5 Slide No. 9
Or Is It This?
TheoryHand Calcs
VirtualTesting
PhysicalTestingHand Calcs Testing Testing
RT-PTN-ADM-3.5 Slide No. 10
Or Even This?
TheoryHand Calcs
VirtualTesting
PhysicalTesting
2 t f 3 R lRT-PTN-ADM-3.5 Slide No. 11
2 out of 3 Rule
Training
Introduction to Riser Systems Fundamentals of Riser Engineering
R i d T i R ti TR
g g
( )SEEW
Required Tension Ratio = TR
oT
( )MUDWoToT
( )REW
API 16Q Min Tension
( )REW
E
( ) ( )SE Ro E ET W TR W ( ) ( )R MUD
o ET W W
0ET
RT-PTN-ADM-3.5 Slide No. 12
Engineered Products
Static Bend TestDynamic Fatigue Test
RT-PTN-ADM-3.5 Slide No. 13
Engineered Products
RT-PTN-ADM-3.5 Slide No. 14
Consultancy
New / Challenging Designs New / Challenging Designs
Design optimisation
Back Analysis (Structural Integrity / Code Calibration) Back Analysis (Structural Integrity / Code Calibration)
FEED studies
CVA, Verification (Parallel), ( )
Technical Authority
Long-term Relationships
L6L2
L1 L3 L5 L7
Riser L4PLET
RT-PTN-ADM-3.5 Slide No. 15
ABAQUS Model
Gap1 – 17.5 mm
Gap2 – 85 5 mmInner Bend
Ring
Outer Bend Stiffener
Gap2 85.5 mmInner BendStiffener Position
Inner BendGap3 – 0.5 mmHead
θInner Bend Stiffener Gap4 – 7.5 mm
Contact Slide Line
RT-PTN-ADM-3.5 Slide No. 16
T
Contact Force by position (max over all angles)
Inner Bend StiffenerFully In
Inner Bend Stiffener
Fully In
Inner Bend StiffenerFully Out
RingRingBottom of
Outer Bend S iff
RT-PTN-ADM-3.5 Slide No. 17
Stiffener
Strake VIV Testing - 1
For BP Sunbury
Planning of Test Program
Supervision of Tests
Extraction of Hydrodynamic Coef
Summary Reporty
Shear7 Calibration
200 T T k
RT-PTN-ADM-3.5 Slide No. 18
200m Tow TankAt Oceanic
Strake VIV Testing - 2
Test Cylinder Fittedyw/ Strakes
Surface Plot for
RT-PTN-ADM-3.5 Slide No. 19
Su ace ot oLift Coef CL
Shear7 Calibration - 1
NDP High ModeNDP High ModeVIV Test RigAt Marintek
For BP SunburyModel Test Rig Model Test Rig
Shear7 calibration against NDP VIV Testagainst NDP VIV Test Data
RT-PTN-ADM-3.5 Slide No. 20
Clump Weight
Shear7 Calibration - 2
Small-ScaleVIV Strakes(17.5D Pitch)
5D VIV Strakes Fitted5D VIV Strakes FittedTo Test Riser
RT-PTN-ADM-3.5 Slide No. 21
Insensys Strain Mat FAT
4 Point Bend Rig4-Point Bend Rig
Axial Rig
RT-PTN-ADM-3.5 Slide No. 22
Thermal Test
Jack Ryan DR Back Analysis
For BP Sunbury
GlobalSantaFe GSF Jack Ryan
22” DR w/ Fairings, 750m WD
3 Acceleration Loggers 3 Acceleration Loggers
Concurrent Current
Fairings Worked well Fairings Worked well
RT-PTN-ADM-3.5 Slide No. 23
Strake Roller Box Testing
For BP Atlantis Project
Development Engineering
Witness all Tests as BP Rep
Interface w/ Project Interface w/ Project
RT-PTN-ADM-3.5 Slide No. 24
DD2 Drilling Riser Back Analysis
2000m water depth
Measured Accelerations & Strains
RiserTec, 2H, MIT
Various Back Analysis Methods
D(Strains) >> D(Accelerations)D(Strains) >> D(Accelerations)
RT-PTN-ADM-3.5 Slide No. 25
Signal to Noice Checks
Check signal to noise ratio between selected unfiltered signal pairs
a) Logger 1, channel 1 v Logger 2, channel 1 f SNR( ) RTsnr 1 1( ) 2 1( ) fs n r W( )( ) ( ) ( )( )
100
1 104
s 1 1( )1
10
100
SNR
0.01 0.1 1 100.01
1s 2 1( )
f
0.01 0.1 1 100.01
0.1
1SNR
ff f
b) Logger 1, channel 1 v Logger 2, channel 3 f SNR( ) RTsnr 1 1( ) 2 3( ) fs n r W( )
100
0 1
10
1 103
s 1 1( )
s 2 3( )0 1
1
10
100
SNR
0.01 0.1 1 101 10 3
0.1
f
0.01 0.1 1 100.01
0.1
f
RT-PTN-ADM-3.5 Slide No. 26
Thunder Horse OE SCR Monitoring
Thunder Horse OE SCRVerify Wavelength to Strain Conversion Verify Wavelength to Strain Conversion
Establish Clean Database
Data Screeningg
Correlations
Calibrate against Design Models
Structural Integrity
Recommendations
RT-PTN-ADM-3.5 Slide No. 27
Sensor Locations
RT-PTN-ADM-3.5 Slide No. 28
Measured Storm Event
10
11
8
9)
7
8
ed H
s (m
)
5
6
Mea
sure
3
4
80 80.5 81 81.5 82 82.5 832
Time from 20/08/2009 (days)
RT-PTN-ADM-3.5
( y )
8-Nov-2009 12noon 10-Nov-2009 12noon
Measured v Model Strains
100SS15
100SS16
100SS17
Max S1-S4 20min std strain
60
80
ms(
) 60
80
ms(
) 60
80
ms(
)
During Storm EventMeasuredModelled
0 20 400
20
40rm
0 20 400
20
40rm0 20 40
0
20
40rm
in
0 20 40 0 20 40 0 20 40
100SS18
100SS19
100SS20St
ra
60
80
ms(
) 60
80
ms(
) 60
80
ms(
)
0 20 400
20
40rm
0 20 400
20
40rm
0 20 400
20
40rm
RT-PTN-ADM-3.5
0 20 40Hs (ft)
0 20 40Hs (ft)
0 20 40Hs (ft)
Hs
MARS Production System
Vessel Design Space
1) Offset Distance: 25-350m
2) Percentage of Slack in Line: 1-9%0% Slack
3) End of Buoyancy Section: 79-99% along line
4) Buoyancy Section Length: 6-30% of
Buoyancy SectionLength
4) Buoyancy Section Length: 6-30% of line
End ofBuoyancy Section
Load Matrix
1) Still water
Offset 2) Near / Far / Cross Current
RT-PTN-ADM-3.5
Off t 25 B E d 94% Off t 50 B E d 94% Off t 75 B E d 94%
Design Optimisation - Riser Curvatureen
gth
Rat
ioOffset=25m, Buoy End=94%
0.2
0.25
0.3
0.35
0 4
0.6
0.8
1Offset=50m, Buoy End=94%
0.2
0.25
0.3
0.35
0 4
0.6
0.8
1Offset=75m, Buoy End=94%
0.2
0.25
0.3
0.35
atur
e 1/
m
0 4
0.6
0.8
1
Buo
y Le
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
Cur
va
0
0.2
0.4
engt
h R
atio
Offset=100m, Buoy End=94%
0.2
0.25
0.3
0.6
0.8
1Offset=125m, Buoy End=94%
0.2
0.25
0.3
0.6
0.8
1Offset=150m, Buoy End=94%
0.2
0.25
0.3
atur
e 1/
m
0.6
0.8
1
Buo
y Le
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
Cur
va
0
0.2
0.4
ngth
Rat
io
Offset=175m, Buoy End=94%
0.2
0.25
0.3
0.6
0.8
1Offset=200m, Buoy End=94%
0.2
0.25
0.3
0.6
0.8
1Offset=225m, Buoy End=94%
0.2
0.25
0.3
ture
1/m
0.6
0.8
1
Slackness
Buo
y Le
n
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
Slackness
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
0
0.2
0.4
Slackness
1 1.02 1.04 1.06 1.08
0.05
0.1
0.15
Cur
vat
0
0.2
0.4
RT-PTN-ADM-3.5
Buoyancy Study
U if BUniform Buoyancy
15 Modules 35 Modules
RT-PTN-ADM-3.5
120
Buoyancy Study
100
1.2010
15
0.80
1.00
m)
20
25
30
Number ofBuoyancy
0.60
0.80
atur
e (r
ad/m
35
40
Modules
0.40Max
Cur
va 45
50
MaxAll
0.20
Allow
Smeared
0.003 5 7 9 11 13
RT-PTN-ADM-3.5
3 5 7 9 11 13Bending Stiffness (kN.m̂ 2)
Heidrun TLP Thru Tubing Drilling
RT-PTN-ADM-3.5
ConocoPhillips 10ksi Drilling Riser
50
60
70
80
t)
Measured BM
10
20
30
40
RM
S
My(
klbf
.f t
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 10
Frequency (Hz)
Mode 1 Mode 2
10-1
ra (
m2 se
c) 10-1
ra (
m2 se
c)
10-3
10-2
Wa
ve S
pe
ct
10-3
10-2
Wav
e S
pec
t
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 110
-4
Frequenecy (Hz)
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 110
-4
Frequenecy (Hz)
RT-PTN-ADM-3.5 Slide No. 36
Equal Area Geometric Progression
Cascade & Chinook
UUJ
TL
ML
BL
LUJ
RT-PTN-ADM-3.5 Slide No. 37
Cascade & Chinook FSHR
Harmonic Force sin(2 )F f t Select lock-in region (BC) Loop current range of interest (VCCS)oop cu e ge o e es (VCCS) For each current speed apply harmonic VIV force (CL=0.5,
S=0.2) Generate steady state Frequency Response Functions (FRFs)Generate steady state Frequency Response Functions (FRFs) Repeat for both IL & CF directions
2
3
p (m
)Uc1 Uc10
45
90
135
se (d
eg) Uc1 Uc10
1
BC
Am
p
90
45
0
BC
Vel
Pha
0 0.5 1 1.5 20
Current (m/s)
0 0.5 1 1.5 2135
Current (m/s)
BRT-PTN-ADM-3.5 Slide No. 38
Cascade & Chinook FSHR
150
180PR - Bend Angle 0.4deg
180
200
30
60
90
120
g) ge (M
Pa)
120
140
160
-90
-60
-30
0
(d
eg
Stre
ss R
ang
40
60
80
100
RT-PTN-ADM-3.5 Slide No. 39-500 -400 -300 -200 -100 0 100 200 300 400 500
-180
-150
-120
S (mm)
0
20
40
Geoprober DrillingGeoprober Drilling
GeoSOS
GeoSOS7-5/8 CSG
16” Conductor
7-5/8” CSG
RT-PTN-ADM-3.5 Slide No. 40
FLAGS Pipeline Hot-Tap FEED Study
For Shell
Joint Venture w/ Genesis ABAQUS Model Joint Venture w/ Genesis
Concept SelectionFEED Engineering
Of Hot-Tap Tee
FEED Engineering
Developed Design MethodologyMethodology
Detailed FEA of Hot-Tap Tee
Fracture Assessments
Technical Assistance to SShell during Detailed Engineering
RT-PTN-ADM-3.5 Slide No. 41
Consultancy - Flexible ProjectsRecent Flexible Projects
Ithaca Stella FEED Study for Stella & Hurricane.
Cameron MARS Production System Cameron MARS Production System
Orlando tie in to Ninian Central FEED (with KW) for VisionOil and Gas
Installation of new water injection riser at Ninian South /recovery of old riser for EPC
Waste water export line for BP Valhall using Manuli Hose for Waste water export line for BP Valhall using Manuli Hose forMooring Systems
Chevron Alder FEED Study High Pressure 8in (800Bar)flexible riser (+WI/GE/Umb) onto Sevan FPSO
RT-PTN-ADM-3.5
Summary
Independent Consultancy
Riser, Pipeline, Mooring, Structural & Hydrodynamics
High Tech Problems/Solutions
Advanced Analysis & Design Coupled with Practical Advanced Analysis & Design Coupled with PracticalExperience
Strong R&D EmphasisSt o g & p as s
Training
Technical Software Technical Software
RiserTec ProductsHi h Add d V l f Cli t High Added Value for Client
RT-PTN-ADM-3.5 Slide No. 43
Why RiserTec ?
P i i l t k L d E i l Principals take Lead Engineer role
Extensive Project Experience
Strong in-house Technical Software Library
Use of Design Automation / Optimisation
Laboratory & Field data provides reality check
RT-PTN-ADM-3.5 Slide No. 44
Selected Projects - 1
Project Client RiserTec ScopeAKPO SCR Bid Engineering HMC , Leiden Detailed analysis and system engineering supporting AKPO bid engineering. Scope
included production of SCR Design Methodology Document, initial sizing for all in-field flowline and risers, detailed fatigue assessments for critical lines, strength d i d li i t ti tdesign, and preliminary cost estimates.
Strake VIV Hydrodynamic Testing BP, Sunbury Planning and management of free and forced vibration VIV tests at Oceanic, Newfoundland. The test program included commercial CRP strakes with 5D and 16D pitch as well as 17.5D strakes from BP Thunder Horse Project. Involved with all aspects of the program from initial planning through to supervision of tests and p p g p g g pextracting of hydrodynamic added mass and lift coefficients as required for input to VIV design programs.
Snorre Tie-back Riser FEED Study RTI Energy Systems, Houston
Detailed analysis and design of future tie-back risers to be installed on the Snorre TLP for additional production, gas injection and water injection service. Due to existing topside restrictions, available tensions budgets were limited requiring low tension ratio designs to be investigated in detail. Performed detailed directional g gfatigue assessement and associated profile designs for both single-piece and double-piece lower stress joints. Produced all system and component drawings with associated weight estimates. Also undertook additional FEED extension study investigating several alternative riser dimensions as requested by Statoil.
RT-PTN-ADM-3.5 Slide No. 45
Selected Projects - 2
Heidrun Workover Riser Slim-Line Drilling Operations
Statoil, Norway Performed initial conceptual and final detailed engineering for slim-line drilling operations on existing Heidrun TLP workover riser system. The work considered both single and dual completion risers under through tubing drilling operations. As a consequence the planned operation is perfromed with the surface wellhead and tree in place requiring the use of a reduced length workover spool up to the drilling riserin place requiring the use of a reduced length workover spool up to the drilling riser tensioner system. To reduce moments in the system, several stack-up configurations, including some with one or more flex-joints, were investigated. Detailed fatigue and strength assessments were then undertakena for the prefered arrangement. A detailed contact force study was also completed and the results used to assess expected wear rates in critical components. Also interfaced with RTI Energy Systems in Houston who were presponsible for component manufacture andEnergy Systems in Houston who were presponsible for component manufacture and procurement.
Shear7 Calibration BP, Sunbury Calibration of Shear7 against Norwegian Deepwater Program (NDP) High Mode Strake VIV Tests. The scope included review of NDP test arrangement and generation of models to extract natural frequencies and associated mode shapes. A program was then generated to extract all measured results from the Marintek d t b d t ti ll i t d t il d Sh 7 l l ti T iddatabase and automatically compare against detailed Shear7 calculations. To aid the comparisons, several bias and index functions were defined. A detailed methodology for undertaking the calibration was also developed and used to perform the initial work. It was noted that the measured results indicated several features that shear7 in its current form is unable to account for in detail. A verification study was also performed for the shear7 program using and independent in-house calculation. Finally several sets of Shear7 design parameters for project use under various strake cover conditions were derived for input in BP VIV Guidelines..
Atlantis in-Field SCR Monitoring Requirements
BP Atlantis Project Detailed risk review and assessment of requirements for riser monitoring on the Atlantis in-field SCRs. Performed detailed risk assessment and interfaced with several vendors with respect to available monitoring options. Recommended outline p g pmoitoring specifications for the in-field pipe-in-pipe production SCR.
RT-PTN-ADM-3.5 Slide No. 46
Selected Projects - 3
Jotun A - Marine Growth Study Esso Norge A/S Detailed assessment of the Lazy Wave and Lazy-S systems designs' of an increasein marine growth substantially above the original design criteria. The work involvedmodelling of the Lazy wave and Lazy-S systems in Orcaflex and comparing thesystem behaviour with the original detailed design. Working with client to achieveacceptable system behaviour and benchmark system response against measured
XY
Z30 mO rcaF lex 8.3a: AS1_NER13_100_Em p.DAT (m odif ied 18:57 on 22/03/2005 by O rcaF lex 8.3a) (azimuth= 295; elevat ion= -11) Statics Complete
acceptable system behaviour and benchmark system response against measuredvalues.
FLAGS Hot Tap Genesis, Aberdeen Detailed FEED study for Hot-Tap on 36" FLAGS Gas pipeline in North Sea. The scope included review of different hot-tap methods, detailed Finite Element analysis including all phase of the operation from branch welding to removal of coupon, and assessment of stress level in the system. A non-linear FEA model was also developed for use against strain based design criteriadeveloped for use against strain based design criteria.
Rosa Lirio Bundle Tow SaiBOS, Paris Detailed analysis and fatigue assessment for towing of the Rosa Lirio bundle towersystem. Considered different weather directions and optimised towing configurationsin terms of tensions, tow procedures, net buoyancy and speed. Finalrecommendations led to the adoption of the Surface Tow method being adopted forrecommendations led to the adoption of the Surface Tow method being adopted forproject use.
RT-PTN-ADM-3.5 Slide No. 47
Selected Projects - 4
Strake Roller Box Tests BP Atlantis Project BP representative for strake roller box mechanical tests performed at Heriot-Watt University, Edinburgh. The scope of testing included various strake designs and materials under a range of roller loads. Produced summary report together with recommendations for design improvements for several of the strake configurations.g p g
BAOBAB Project - Installation Analysis Manifolds and Suction Anchors
Technip Carried out detailed assessment of the installation of the Manifolds and SuctionAnchors for Baobab in up to 900m water depth. Results were bench-marked againstactual crane measurements from offshore. Developed and assisted client in allaspects of procedures and analysis for installation.XY
Z2 0 mOrcaFlex 8.3a: PA2_8T14_5_180deg _sub.sim ( modified 14:13 on 31/12/2004 by OrcaF lex 8.3a) (azimuth=294; elevation=5) R eplay T ime: 2.50s
p p y
Simian Sapphire Project - Span Assessment of Installed Sapphire Pipelines
Technip On bottom roughness assessment for all Sapphire lines from 4in MEG Injection linesto 26in Export line. Automated assessment of spanning and through life pressuretemperature cycling and VIV to DNV F101 and F105 codes using ABAQUS 2D/3Dmodelling of the seabed Eventually analysed over 80Km of lines and umbilicalsmodelling of the seabed. Eventually analysed over 80Km of lines and umbilicals.Fracture assessment to BS7910 of Umbilical cores for as-installed condition andcrack growth assessment.
RT-PTN-ADM-3.5 Slide No. 48
Selected Projects - 5
Deepstar 7402 Empirical Benchmarking Study
Deepstar RiserTec was a participant in this benchmarking study of the Lake Seneca test dataagainst SHEAR7 for both 'open' and 'blind' test cases as part of the Deepstar JIP onriser VIV
Dalia Project - Jumper VIV Technip Paris Contract involved the detailed assessment of a complicated spool geometry forpotential VIV The spool was analysed using ABAQUS and the potential for VIVpotential VIV. The spool was analysed using ABAQUS and the potential for VIVassessed using the in house 'power balance' package RT_VIV which was furtherdeveloped as result of the requirements of this project. In addition developed a'radial' method for the assessment of the complicated modal response of thecomplicated structure. Developed and assisted client in all aspects of procurementof strakes and determining critical coverage requirements.
Geoprober Drilling Riser System Design Geoprober The Geopropber system enables "slim" deepwater exploration and appraisal wells to Aberdeen be drilled for significantly less money than would be the case using a "conventional"
approach - the cost savings will amount to 50% or more. Typically a 4 3/4" hole will be drilled through the reservoir. RiserTec has provided riser system design and analysis for Geoprober to prove feasibility including the tensioner and stress joint design for different operating climates around the world.
Geo prober
Drilling Ltd .
RT-PTN-ADM-3.5 Slide No. 49
g
Selected Projects - 6
Algodoal Drilling Riser VIV Back Analysis BP, Sunbury Detailed back analysis of the 22" drilling riser working on the Algodoal well offshore Brasil in 750m of water. Due to strong currents in the region the drilling riser had been fitted with VIV suppression fairings and instrumented with a small number of accelerometers. Current profiles throughout the water column were also measured. Ri T i d ll d t d f d d t il d b k l i f thRiserTec reviewed all data and performed a detailed back analysis of the measure riser response against Shear7 predictions. From this work the efficieny of the fairings was determined.
Holstein TTR S09 Back Analysis BP Sunbury Detailed back analysis of Holstein SPAR Top Tensioned Riser S09 response based on detailed measurements including riser accelerations, current profiles and vessel motions. Assessed derived keel motions based on measured cellar deck
l ti d d d i ifi t d t i ti d taccelerations and recommended significant upgrade to existing procedure to improve data. Assessed riser response against vessel motion and VIV excitations and estimated associated fatigue damage rates.
Qualification and FAT testing for Insensys Strain Mats
BP Atlantis Project Acted as BP site representative for Qualification and FAT testing of two Insensys fibre optic strain guage mats for the BP Atlantis project. Involved in specification and set up of axial, bend and thermal tests and basic checks of results. Undertook detailed spectral analysis of time history data to determine instrumentation noise levels under various constant load conditions.
RT-PTN-ADM-3.5 Slide No. 50
Selected Projects - 7
BP Drilling Riser DD2 Fatigue Verifications
BP America Independent verifications of BPs RAE contractors fatigue assessemnts for the BP drilling riser DD2 in the Gulf of Mexico. The study scope includes an independent Modal analysis to determine riser response based on measured accelerometer data. Several different modal methods will be assessed and calibrated using a theorectical gOrcaflex model of the riser. RiserTec's wave transfer function method for converting measured acceleration directly into currvature based on the wave equation solution for the riser will also be assessed.
C/WOR Clamp Analysis FMC, Norway Assessemnt of umbilical clamp on Completetion and Work over Riser during riser running operations. In particular the integrity of the clamp under various impact scenarios was assessed and recommendations made for suitable qualification testing.g
Cascade & Chinook Riser Tower Bid Support
Petrobras America RiserTec is undertaking an independent review and analysis of the Free Standing Hybrid Riser (FSHR) Towers for the Petrobras Cascade & Chinook Development. RiserTec is also providing support to Petrobras during the Riser bid evaluation phase.
RT-PTN-ADM-3.5 Slide No. 51
Selected Projects - 8
BP QUAD 204 Re-development Study Genesis, Aberdeen RiserTec is providing riser engineering support to Genesis for the BP QUAD 204 (Schiehallion) re-development study. The work involves developing riser concepts for new FPSO, SEMI (based on Thunder Horse) and TLP (Based on Heidrun) options including layouts and basic riser specificationS as well as cost and schedule estimates.
RT-PTN-ADM-3.5 Slide No. 52