ABOUT US

 Back in 1993, members of the Cokebusters team worked on the first mechanical decoke in Europe.
Smartpig research and development began in the late 1990s, with the first patent application made in
May 2000.

 In April 2005, the incorporation of Cokebusters Ltd. brought together “pigging” and tube inspection
under one roof. The company has been going from strength to strength ever since, with our team of
engineers and operators continuing to develop innovative solutions which enable us to best serve our
clients around the world.

 From our two headquarters in the United Kingdom and the United States, we are able to consistently
deliver high quality services to the oil and petrochemical industries worldwide.
 OPERATING AREAS Sweden
- Shell, Shell Pernis
- BP, Rotterdam

Norway
Netherlands - Exxon Mobil, Slagen
- Shell, Shell Pernis - BP, Rotterdam
- BP, Rotterdam

United Kingdom
- Exxon Mobil, Fawley
- Phillips 66, Lindsey Oil
- Essar Energy, Stanlow

Netherlands
- Shell, Shell Pernis
- BP, Rotterdam

Germany
- Shell, Godorf Cologne
- TOTAL, Buna SOW Leuna

France Russia
- TOTAL, Gonfreville l'Orcher - Surgutneftegas, Kinef
- Exxon Mobil, Port Jerome - Bashneft, Ufimsky

Portugal
- Galp Energia, Sines Greece
- Galp Energia, Porto - Hellenic, Aspropyrgos
- MOH, Corinth
Spain
- Repsol, Cartagena Ukraine Italy
- Petronor, Bilbao - Ukrtatnafta, Kremenchuk - ENI, Sannazzaro
- BP-TNK, LINOS - Exxon Mobil, Esso Augusta
 FIRED HEATERS

• Fired Heaters are an essential component of most process plants.

• Fired Heaters are a major consumer of energy and even the smallest
efficiency improvements can save thousands of dollars.

• Even a 1% improvement in thermal efficiency can translate into energy

savings of >$500,000 per year.
CIRCLE OF COKING
Coke deposited

Reduced thermal
efficiency, throughput & Reduced heat flux
increased risk

Further increased Increased operating

operating temperature temperature

Accelerated coking &

corrosion
PREVENTATIVE MAINTENANCE

Defined as…

“Maintenance that is regularly performed on a piece of equipment to lessen the likelihood of it

failing.”

Proven within industries worldwide to increase productivity and efficiency.

DECOKING

Regular mechanical decoking ensures that process tubes do not become blocked.

A blockage will typically result in either tubes having to be replaced or jetting

implemented to obtain passageway for mechanical decoking.

Blockages will significantly increase downtime.

Regular mechanical decoking maximises heat flux/transfer and throughput – in a

typical 4” SCH40 coil, an even 5mm layer of coke can reduce throughput by 18%.
DECOKING

Coke can contribute to various tube corrosion mechanisms such as sulphidation,

carburisation, embrittlement and metal dusting.

Continued corrosion can result in premature tube failure.

A regular decoking schedule will always increase long term productivity and net
refining margins.
 OUR EQUIPMENT
Series 21 double pumping unit
Modern machinery – power and reliability

Scraper pigs – Durable & Flexible

Skilled and experienced personnel

Directly employed & trained – No agencies, sub contractors
or temporary staff
S21 DOUBLE PUMPING UNIT SPECIFICATION
Two turbo diesel engines and two water pumps are controlled
independently to enable two passes to be cleaned simultaneously.

Onboard electronics control Engines and water pumps

independently

Two-stage filtration system for on-board collection and

storage of coke and scale fragments

Automatic emergency Chalwyn™ and Roda Deaco™ shut down

Exhaust systems equipped with spark arresters

Pressure and flow monitored digitally through bespoke

software
SCRAPER PIG SPECIFICATION

Extensive range of pigs to decoke tube sizes 1” to 12”

Pigs function Bi-Directionally for increased efficiency

All Pigs are manufactured to a Patented design in

Hawarden UK

Designed to ensure 360° circumferential coverage with minimal

damage to return bends and pipework

Designed to manoeuvre short radius return bends, plug

headers, mule ears and flat-back bends

Each pig contains up to 308 titanium pins for

maximum coke removal per run
SMARTPIGGING
Radially mounted, ultrasonic immersion probes

Propelled using water flow

Flow controlled by decoking pumping unit

(or other suitable pump)

Requires a clean internal tube wall

Data stored within the tool and

downloaded to laptop following
inspection
SPECIFICATION +/-0.1mm
2.5-12 Inches Static Accuracy (Wall Thickness)
Tube Diameter Range (Internal)

±0.75%
ID Accuracy (Full Scale)
+/-50mm
Axial Location Accuracy

8hrs
Battery Life 0.3 – 0.8m/s
Running Speed

Bidirectional
30,720
Individual Wall Thickness
Measurements
 DATA ANALYSIS &
REPRESENTATION

• Data viewable after 10-20 minutes of

upload
• Multiple analysis methods for rapid
anomaly identification & verification
• Individual A-scans recorded from each
individual pulse/measurement
• 3D C-scans and interactive software
provided with each report
 DEFECT DETECTION
Ability to accurately detect and quantify:

Internal metal loss (local and general)

External metal loss (local and general)
Fretting
Creep (bulging, ovality, swelling)
Internal fouling (including coke thickness & location)
Areas of pitting
Historic repairs
Dents
DEFECT DETECTION

Highlights areas of remaining fouling &

hotspots
*Coke scans can be provided as a service

Highlights localised defects

FFS & RLA
• Level 1 & 2 Fitness For Service assessments in accordance with API 579/ASME FFS-1

• Carried out on individual local and general metal loss anomalies identified from smartpig
inspection

• Tmin/MAWP calculations provided

• ALS able to carry out Level 3 assessments

• Remaining Life Assessments carried out in accordance with API 579

• Carried out for each ‘zone’ within each pass

BASELINE INSPECTION

Baseline inspections remove uncertainty caused by manufacturers

tolerances, and equip engineers with the data required to
confidently make decisions on maintenance, repair and inspection
activities.

Should ALWAYS be carried out during commissioning to maximise

the accuracy of all future Fitness for Service and Remaining Life
Assessments.
 BASELINE INSPECTION
Graph 1 Graph 2 Graph 3
10 10 10
Thickness (mm)

Thickness (mm)

Thickness (mm)
8 8 8
6 6 6
4 4 4
2 2 2
0 2,5 5 7,5 10 0 2,5 5 7,5 10 0 2,5 5 7,5 10 12,5 15 17,5 20
Time (years) Time (years) Time (years)

Graph 2 demonstrates the same

As Graph 3 illustrates, had the coil
Average wall thickness for the coil results, except the average wall
continued to deteriorate as it had
from three separate smartpig thickness obtained from the baseline
over the first five years, by year
inspections carried out over ten inspection (0) has been replaced
eighteen, wall thickness would have
years. with the specified nominal wall
been as low as 2mm.
thickness.
CONVENTIONAL NDT VS SMARTPIGGING
Manual UT Smartpigging

Access No physical access to the coil is required

Surface preparation required Limited furnace preparation

3-point wall thickness measurements Able to detect, locate and quantify

internal fouling/coke

Unable to detect pitting or creep Able to detect localized defects, creep

damage damage and pitting

No C-Scans; difficult to model Able to produce full colour coded 3D

corrosion patterns models of process coils/tubes
 FINANCIAL CONSIDERATIONS
Q. Approximately how long would it take to carry out a handheld UT
inspection of a typical 4-pass fired heater process coil? What would
the typical cost be?

A. It would usually take 4 shifts longer than smartpig. The cost is

around $75k (comparable to smartpigging) not counting added
downtime and lost production. Obviously this does not include any
inspection of convection coils. – Process Engineer, Exxon Mobil, USA
 TRUE COST OF CONVENTIONAL NDT
Estimated Losses From A 100,000 bbl/day Capacity Crude Typical Refinery Costs for Smartpigging vs'
Unit Handheld UT
$1.200.000,00
Crude Processing Capacity 100,000 Bbl
$1.000.000,00

Net Refining Margin $2.12 / Bbl $800.000,00

$600.000,00
Losses in Refinery net Margin $212,001 $1.011.252,00

$400.000,00
Total Staff Cost $869m / yr $200.000,00
$84.271,00
Staff Costs Without Return $293,625 $0,00 $70.000,00 $75.000,00
1 2

Total Losses Per Day $505,626 Invoiced Cost Downtime

 CONCLUSIONS
Regular mechanical decoking and in-line inspection has been consistently proven to:

Increase efficiency
Minimise risk
(environmental impacts)

Increase productivity Improve safety

(net refining margin)

Save on maintenance costs