The Hydrographic Society

Underwater Spoolpiece Metrology Workshop

Thursday 19th May 2005

Smart Wire Metrology System

By : Simon BarrettProject Manager

Contents

Slide 4

System Info (what are the smart wire Components?)Smart Wire Hardware -----------------------------------------------System Configuration -----------------------------------------------Docking System -------------------------------------------------------

System Set-up (What preparation is required before ops?)External Offsets --------------------------------------------------------Internal Offsets --------------------------------------------------------Calibration Beam ----------------------------------------------------

System Operation (What does a typical met. Op. consist of)Taking Measurements ----------------------------------------------Photos / Demo --------------------------------------------------------Raw Data ---------------------------------------------------------------Processed Data -------------------------------------------------------Issue of metrology Results -----------------------------------------

Accuracies (What are system accuracies and limitations?)Specified SWM range and Accuracy ------------------------Achievable Accuracies -------------------------------------------System Restrictions ---------------------------------------------------Procedure Modifications ------------------------------------------

Summary (When/where will the equip. be used in future?)Smart Wire Track Record ------------------------------------------Pros and Cons --------------------------------------------------------Future Operations ----------------------------------------------------

Slide 3

Slide 5

Slide 6

slide 7

Slide 8

Slide 14

Slide 9

Slide 18

Slide 19

Slide 16

Slide 15

Slide 10

Slide 11

Slide 12

Slide 13

Slide 20

Slide 17

System Info - Smart Wire Hardware

Contents

SWM measuring unitCalibration beam

Wire anchor

Wire winch

PC withSWM

software

Based on

- Dist

- Angles

- Ht.

- P &R

Principles

- Primary

ROV 2000m

- Divers

Shallow water

System Info - Configuration

• Test

Dual units withhardwire linkDiver operated

JB

SWM measuring units

Winch

Jumpers

Hardwire link

1

umbilical

Base Reference

Surface supply:200Bar hydr.24 Vdc power2 off signal lines

Single unit Diver/ROV operated

winchcontrol

JB

SWM measuring unit

Winch

ROV supply:200Bar hydr.24 Vdc power2 off signal lines

Wireanchor

Jumpers

2

winchcontrol

JB

SWM measuring unit

Winch

Wireanchor

Jumpers

3

Gyro

ROV supply:200Bar hydr.24 Vdc power2 off signal lines

Single unit with GyroROV operated

Contents

The SWM standard docking system consist of a female connector permanently fitted (and surveyed) on to the structure

System Info - Docking System

To release the smart wire for recovery the ROV rotates the handle at the top of the SWM unit.

Baseline 1

Baseline 2

Centre line

1. Stab-in 2. Entry of alignment studs (complete mating)

3. Push out recovery (pop-up mechanism)

G reen ind icato rM ated

R ed ind icato rN o t m ated

A d ju stab le m agnet ho ld er

M agn et

R eed re layS prin g

S ensing p in

Contents

During deployment, the male stab on the SWM unit is first enteredinto the SWM female, the unit is then rotated such that thealignment studs are entered with the unit orientated into thedesired baseline (four directions are possible).

In order to confirm complete stab-in, the male connector is equipped with a contact indicator – viewed in software

Linear external offsets from Fixture to Measuring Point

System Setup - External Offsets

Angular offsets for alignment of Fixture Point to structure. The Yaw, Pitch and Roll offset is the required rotation of the fixture point (SWM female) for alignment to the structure baseline and plan.

Contents

Z

X

Y

FP Baseline offset (+)

Side offset (+)

Radius offset (+)

Measuring Point (MP)

- Pitch offset

+ Roll offset

A

B

CD

X

Y

SWM female

XY

FP

Structurebaseline

+ Yaw offset

Structure plan

Linear internal offsets from

1. Fixture Point to the Wire exit2. Fixture point to the depth sensor

System Setup - Internal offsets

Baselinewire exit

Heightdepthsensor

Heightwireexit

Sidedepthsensor

Baselinewire exit

+ Baseline

+ Height

+ Baseline

+ Side

Wire exit

Depthsensor

Fixture Point

Contents

System Setup - Calibration Beam

The calibration beam can be used :-Subsea mounted fitted on the ROVAt the surface for checks.

The parameters checked by the calibration beam are :-Azimuth angletaut-wire distance Inclinometers

Contents

System Ops - Taking Measurments

Base unit

Reference unit

Measuring unit

Wire anchor

Switch unitposition forcross-check

Measuring unit

Wire anchor

Readings with wire anchor and measuring unitin opposite positions are required for

complete set of metrology data

Contents

System Ops – Photos / Demo

Contents

Smart Wire equipment prepared ready for Deployment

Wire Anchor Deployed in 1st

receptacle

Smart Wire measuring unit deployed in 2nd receptacle, measurement process on going

Century 4 D

System Ops - Raw DataAn example of Pitch and Roll Data recorded during drilling operations. Excessive vibration invalidating the data.

Data monitored and recorded Online, prior to processing

Contents

1

2

34

56

Stable Pitch and Roll data

System Ops - Processed Data

Snapshot Post Processing Window

Contents

1

2 3

4

5 6

78

Measuring point recalculation

Export of stored data in report formatready word documents

System Ops - Issue of Metrology ResultsThe output from the processing software will be translated into a typical A1 metrology Diagram

SDC Production Manifold

SP2 CVC Hub

SDC Production WellheadSP2 TreeCVC Hub

Structure North

8.461m 0.02

6m

Pitch 0.74°Structure South Up

Structure North

Structure N

orthStructure N

orth

Roll 0.76°

Structure E

ast Up

Pitch 0.40°Structure North Up

Roll 0.26°

Structure East U

p

Spool Baseline

Spool Baseline

ElevationLooking West

Plan

Plan

7.82°

13.36°

7.82°

Husky White Rose Development ProjectSouthern Drill Centre

--------------------------------------------------------------------------------------------------------

SP2 Spoolpiece MetrologyProduction Manifold CVC Hub SP2 to SP2 Production Well CVC Hub

Drawn By: P. R. WhiteChkd By: E. LiedSurveyed: 8 Aug 2004

Method:

9 Aug 20049 Aug 2004

Constructor

Smartwire MetrologyDwg No.: PRW/MET/04-1 Rev: 0

7.82°

Spool Baseline

Structure North

Structure North

A

A

BB

0.35°

0.65°

PLAN

CC

0.84°

0.33°

SECTION B-B

SECTION C-C

SECTION A-A

8.461m

0.02

6m

SDC Production WellheadSP2 Tree CVC Hub

SDC Production ManifoldSP2 CVC Hub

SDC Production Manifold

SP2 CVC Hub

SDC Production WellheadSP2 Tree S/N 11079665-1

CVC Hub

13.36°

< North

Husky White Rose Development ProjectSouthern Drill Centre

--------------------------------------------------------------------------------------------------------

SP2 Spoolpiece MetrologyProduction Manifold CVC Hub SP2 to SP2 Production Well CVC Hub

Drawn By: P. R. WhiteChkd By: E. LiedSurveyed: 8 Aug 2004

Method:

9 Aug 20049 Aug 2004

Constructor

Smartwire MetrologyDwg No.: PRW/MET/04-2 Rev: 0

Contents

Accuracies - Specified SWM range and accuracy

Notes:

1. 1. Using wider (+50mm) winch

2. 2. Linear accuracies +/- 50mm are claimed for a range up to 10 m

+/- 100 mm for a range up to 110 m.

3. 3. Range applies for stated accuracy, mechanical range is +/- 80°Contents

Measured Parameter

DerivedParameter

Range Accuracy Resolution

Taut-wire distance (Tautwire) MPhordist 1-110 mnote 1

+/-0.05-0.1 mnote 2

0.002 m

Azimuth angle (Ref/BaseAzimuth)

Ref/BaseMPazimuth

+/- 75°note 3

+/- 0.5° 0.1°

Relative orientation of units (DeltaAzimuth)

DeltaMPAzimuth

0-150° +/- 1.0° 0.1°

Elevation difference (difference Ref and BaseMPdepth)

DeltaMPElevation

+/- 70 m +/- 0.03 m 0.01 m

Pitch and Roll Ref/BaseRoll/Pitch

+/- 30° +/- 0.25° 0.1°

Accuracies - Achievable accuracies

Contents

Measured Parameter SWM Reading Survey Data Difference

RefMPazimuth (deg) -15.41 -15.33 -0.08

BaseMPazimuth (deg) 33.62 33.76 -0.14

DeltaMPazimuth (deg) 49.03 49.09 -0.06

MPhordist (M) 22.78 22.74 0.04

RefBLdist (m) 21.96 21.93 0.03

Refsidedist (m) -6.05 -6.01 -0.04

BaseBLdist (m) 18.96 18.91 0.05

Basesidedist (M) 12.61 12.64 -0.03

Accuracies - System Restrictions

The measuring range for azimuthlimited to ± 75°Tautwire

Wireexit

Rangehorizontalangle :± 80°

Azimuth sensorwith shaft

Rollers andwire exit

Rangeverticalangle :± 45°

Wire arm Wire arm

Side view Plan view

Oil filling port

Bladder

Airbleed

Bulkheadconnector

GENERAL

Titanium Housing Rated for 3000 m depth syntactic foam CF242 Rated for 2000 m water depthDigiquartz sensors Operational depth of 2000 m.

Actual measuring range 10-15 m less as minimum 10 turns of wire always should be left on the drum

Within normal temperatures very hot climates - screened for direct sunlight when on deckContents

Vertical Angle Limitslimited to ± 45°

Accuracies – Procedure Modifications

Stage (1) – Tautwire and angle measurements

Stage (2) – Inclinometer readings at 0 and 180 degrees

Stage (3) – Digiquartz Closed Loop Traverse

Contents

Timings

System Mobilisation 24 hoursWinch Sensitivity Check 30 minutesPre-dive Checks (Cal beam) 30 minutesX2 Distance and angle measurements 1 hourX2 Inclinometer measurements 1 hourDigiquartz Closed Loop 1 hour

Approximately 3 – 4 hours per metrology subject to familiarity of the ROV team with smart wire operations.

Summary - Smart Wire Tack Record1999 The Smart-Wire Metrology (SWM) system was developed by NGI on an initiative from DWS.

No. Project DateNumber

of Spools

Water depth

1Technip PDEG Profundo - BrazilVessel CSO MarianosOperation MODE - Diver

April 2004 5 60

2Husky White Rose – Canada Vessel CSO ConstructorOperation MODE - ROV

August 2004 4 100 - 125 metres

3Husky White Rose – Canada Rig Glomar Grand BanksOperation MODE - ROV

April -May2005

3 - 5 100 - 125 metres

2004 - 2006 Century Subsea Ltd. are exclusively operating the system in conjunction with NGI, with the intention to develop the system and integrate it into the survey industry.

2000 - 2003 Various projects attempted to launch system into the market. (2 No. Spools measured for VEBA TMLS / 2 No. Spools measured at East Telford

6 No. Spools measured at platform location J6A, K1A K5D and K5 ENC)

Contents

Summary – Pros and Cons

Advantages of system

No Acoustic Noise

No Acoustic Reflections

Fast Operation at Single metrology sites.

Integration with EHF Acoustics

Disadvantages of system

No time saving for multiple metrologies at one site

Currently one system on the market

Specialised operators

ROV learning Curve

Units in Scientific notation

External offsets use non survey conventional reference frame

Contents

Summary - Future Operations

Integrated system

- Metrology package - Tailor made to the requirement / conditions

- Greater pool of smart wire operators / increased number of units

C-SAMS Package

- Gyro Display

- Pitch and Roll Display

- ROV Switch

- Batteries / MODEMContents

Sonardyne Acoustics

- Baseline measurements

- Inclinometer readings

- Digiquartz observations

Baseline 1

Baseline 2

Centre line

360

mm

135 mm

Wireexit

Fixturepoint