Instrumentation of Top Drives for Prevention of … Real-time...Instrumentation of Top Drives for Prevention of Dropped Objects on Drill Floors Chris Tolleson ©Lloyd’s Register

Working together for a safer world

Instrumentation of Top Drives for Prevention of Dropped Objects on Drill

Floors

Chris Tolleson

©Lloyd’s Register Global Technology Centre

The Lloyd’s Register Group at a glance

• Offices in 250 locations worldwide delivering services in

228 countries and territories

• 9,000 employees of 90 nationalities

• Celebrated our 250 year anniversary in 2010

• Charitable basis - safety of life; i.e. no shareholders

• Four business divisions:

• Marine

• Energy

• Transportation

• Management Systems (LRQA)


LR Global Technology Centre Singapore

• Created to address the challenges in the industry,

particularly energy sector

• Significant investment of S$35m over 5 years

• Current headcount of 32 employees and growing

• 5 core technology programmes:

o Risk exposure

o Next resources

o Life extension

o Uptime & Energy Efficiency

o Smart supply chain

• Research collaboration with internal and external

partners


Expertise Areas

• Drilling, subsea, well control

• Asset & structural integrity

• Hydrodynamics / CFD

• Risk management

• Failure analysis

• Marine technology

• Engineering dynamics

• Floating offshore

• Pipelines & risers

• Offshore wind

GTC Research Team


Sep 2012

A*Star Master Research

Agreement established

Feb 2013

First project agreement

signed with A*STAR

Apr 2013

Joint lab with A*STAR

Institute of High

Performance Computing

established

Jan 2013

First Industrial

Postgraduate Programme

candidate on board

NUS and NTU student

recruitment continues

Oct 2013

LR Global Technology

Centre Research Lab

LR Energy Drilling Training

Centre launched

LR Global Technology Centre - Key Milestones


Current Focus Areas at GTC


- Radio Frequency ID tags (RFID)

- Blowout preventer (BOP) modelling

- BOP risk model

- Data mining

Subsea, Drilling & Well Control Equipment


Assumption on top drives

• Drops are caused by forces on top drives that exceed operational

parameters

• One could argue that dropped objects are likely to happen when the

top-drive structure is in resonance and when the vibration exceeds

certain threshold.

• On the other hand, impacts on the drill-bit are expected to cause

broad band excitation of the drilling string and top drive.

• The fact that the system is rather complex and it changes

continuously through the drilling process makes the task to obtain

the modal response of the structure complicated.


Modal Analysis


Operational Modal Analysis


Advantages of Fiber Bragg Gratings

• Immunity to electromagnetic interference (EMI) and electrical discharge

(lightning).

• Passive operation, intrinsically safe.

• Water and corrosion resistant.

• Excellent resolution and range.

• Rugged, small size and light weight.

• Small size allows for insitu measurements .

• Multiple sensors per channel.

• Absolute measurement.

• Low signal loss, sensors may be interrogated for many kilometers.

• Signal conditioning equipment has a much smaller foot print.


Fibre Optic Sensor Types

os3110 Metallic Weldable

Strain Gage

os3200 Non-Metallic Flexible

Strain Gage

os3155 Metallic Weldable Strain

Gage

os1100 Single FBG in polyimide

coated fiber

os4100 Temperature

Compensation Gage

os4200 Single Ended Calibrated

Temperature Gage

os4310 Double Ended Calibrated

Temperature Gage

os4350 Double Ended Calibrated

Temperature Gage

os7100 Accelerometer


Fibre Optic Interrogators and Controllers

4 channels with a spectral width of 1510 to 1590 nm. Available from 1410 to 1590 nm

1hz to 2 khz scanning frequency

Wavelength repeatability 1pm@1khz, 0.05 pm with 1,000 averages

Power consumption 25 watts, 50 watts max

Operating temperature 0 to 50 degrees C

Available from 1 to 16 channels

1.4 GHz Pentium, 512 MB DDR, a 32GB Solid State HD and Windows XP operating system.

Peripheral interfaces include USB, Ethernet, RS232/422/485 and a user configurable digital I/O.

Provides power management through wake-on-LAN and wake-on-clock functions. Small foot print, mounts directly on the interrogator


Discussion of a Riser Tensioner

Monitoring System Installed on the

Semi-Submersible


Overview

• Meet API 16Q requirements for a more accurate determination of the reduction

factor.

• Need to measure full system load, current system measurements based on

hydraulic pressure.

• Long Term

• Reliable

• Intrinsically safe operation

• Quick implementation and ease of installation

• Provides for remote monitoring and maintenance capability


Top View of Riser Tensioner

Layout Under Drill Floor

Functional Description of

The Riser Tensioners

1 2 3

6 5 4


Tensioners on the Semi-Submersible


Sensor Layout for Two Tensioners


Surface preparations and

sensor installation.

Protection wrapping of sensor

locations for transportation to the DSL.


• Sensor locations after

tensioner installation on the

DSL.

• Each tensioner has 3

os3155s 120 degrees apart

in the axial direction.

• Each tensioner has 1

os3200 in the hoop direction

to measure pressure.


Equipment Rack


• Acquisition rate is 10 Hz

• X Axis represents approximately 2.41 minutes of data

• Y Axis = Strain

• Waveforms confirm a swell period of ~ 12.5 seconds correlating to ships weather


Discussion

• Sensors were installed in the Bosch Rexroth facility in Uden Netherlands in

September 2012.

• Real time calculations and display are within 5% of modeled loads.


Ideal System For Characterizing Top Drive Vibration and Forces

• Independent of the OEM equipment

• Never needs calibration

• Doesn’t require local power

• Intrinsically safe

• Tells us strain, vibration, acceleration, temperature, and pressure and more…


Conclusion

• Drops from Top Drive JIP proposed

• Methodology and Suitable Sensors Discussed in JIP proposal

• Further Discussions about participation in the JIP


Acknowledgments

• Williams (end customer)

• Durham Geo Slope Indicator (DGSI)

• Tel: 800-837-0864

• Email: [email protected]

• Web: www.durhamgeo.com

• Micron Optics, Inc.

• Tel: 404-325-0005


• Web: www.micronoptics.com

• University of Minnesota

• Jeff Marr

• Tel: 612-624-4427


• Sandia National Laboratories

• Jonathan White

• Tel: 505-284-5400


• Transocean

• Aaron Barr

• Tel: 713-23207959


mailto:[email protected]



http://www.durhamgeo.com/


http://www.micronoptics.com/




Lloyd’s Register and variants of it are trading names of Lloyd’s Register Group Limited, its subsidiaries and affiliates.

Copyright © Lloyd’s Register [Entity]. 2013. A member of the Lloyd’s Register group.

First name Last name Position

Unit/ Department

T +44 (0)23 2345 5432 E [email protected]

Lloyd’s Register [Entity]

71 Fenchurch Street, London EC3M 4BS

Working together for a safer world

Chris Tolleson Systems & Controls Lead Specialist

Subsea, Drilling & Well Control Equipment

T: +65 6594 6960

M: +65 9657 0674

E: [email protected]

Lloyd’s Register GTC, Global Technology Centre

1 Bukit Batok Street 22 #03-02A GRP Industrial Building

Singapore, 659592



Instrumentation of Top Drives for Prevention of … Real-time...Instrumentation of Top Drives for Prevention of Dropped Objects on Drill Floors Chris Tolleson ©Lloyd’s Register

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