Transocean’s CBM Program

Bob Speirs Condition Based Maintenance Specialist

Transocean owns or operates a modern, diversified fleet of 138 mobile offshore drilling rigs, including 71 floaters (Drillships and Semisubmersible rigs) and 65 Jack-up rigs.

Floater fleet includes 21 Drillships and 50 Semisubmersible rigs.

31 active dynamically positioned (DP) Drillships and Semisubmersibles are optimized for ultra-deepwater exploration in moderate environments and remote areas.

The 65 Jack-up rigs are preferred in shallower water depths because their elevating legs, which extend from the rig's hull to the sea bottom, provide a stable drilling platform.

All of our Jack-up rigs are cantilevered rigs capable of drilling in maximum water depths of 200 feet to 400 feet.

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Transocean Offshore Deepwater Drilling Inc

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DEFINITION OF CONDITION BASED MAINTENANCE The preventive maintenance initiated as a result of knowledge of

the condition of an item from routine or continuous monitoring. DEFINITION OF CONDITION MONITORING The continuous or periodic measurement and interpretation of data

to indicate the condition of an item to determine the need for maintenance.

CBM Programs

CBM Programs

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CONDITION BASED MAINTENANCE (CBM) LINKS THE PLANNING OF MAINTENANCE TO THE ACTUAL HEALTH OF THE EQUIPMENT

The major principle behind CBM is that the onset of equipment defects

will be detected by the monitoring and trending of various parameters, i.e. by condition monitoring (CM)

When a potential problem is identified proactive CBM tasks can be

planned in advance, and focussed on specific corrective work, with minimised impact on plant availability.

Depending on the nature and severity of the developing defect such tasks may/could include

• More frequent monitoring, (to keep an eye on the rate of deterioration) • Planned activity for a future maintenance campaign • Immediate equipment shutdown/switching to a alternative unit

CBM Programs

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THE FOLLOWING CM TECHNIQUES ARE AVAILABLE TO DETERMINE THE HEALTH OF AN ITEM OF EQUIPMENT

Vibration analysis

Electric motor phase current analysis

Partial discharge testing

Position monitoring

Temperature monitoring

Process parameters to support performance monitoring

Filter differential pressure monitoring

Cooling/Heating water fluid analysis

Lube oil, grease and hydraulic system fluid analysis

Reciprocating machine cycle analysis

Ultrasonic detection

Thermography

Seal leakage

Insulation resistance

Valve timing

Battery monitoring

Oil Program

Presently the 138 rigs within Transocean utilise 5 different Companies/laboratories to undertake their sample analysis and reporting:- Intertek (APU) – 48 rigs Staveley (NAM) – 17 rigs Petrobras (SAM) – 3 rigs SGS Vernolab (EAU) – 64 rigs TSMP (SAM) – 6 rigs

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Each laboratory has an individual database that rigs can access to display their reports and results, abnormal analysis results are emailed to rig for action, presently changing to RMS to incorporate all fluids analysis results into one location, along with maintenance history, and to report the results directly to rig staff.

Transocean’s corporate standard tasks for fluid sample collection and analysis were pre-defined, which with respect to oil analysis at present are scheduled on a 30, 90, 180 and 365 day frequency

Develop a Baseline/Lubrication Audit

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A critical step is the development of a baseline of the current oil program condition, equipment failures and reliability within on each rig, which is needed to measure progress.

The personnel responsible for the program must know the condition of the equipment, failure rates and costs before the program was initiated in order to assess the improvements.

To create a good baseline, it may take some time and effort to collate the information from the existing maintenance records, a detailed trail of a lubricant is required beginning with the oil supplier and ending after disposal.

Therefore, to ensure an accurate baseline it is imperative to carry out a Lubrication/Fluid Survey or Audit, to determine where things are now as the initial step in defining the course of action going forward. DWC.pdf

Whilst carrying out this audit it was decided the compilation of Rig Lubrication Plans should be undertaken by the same contractor to ensure a standard output and report format. ELPG ENG 010.pdf MTHL CRN 004.pdf

The Oil Analysis Tool Kit

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Used Oil Analysis Laboratory

On-Site Analysis

On-Line Sensor Analysis

On-Rig Test Centre

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A Combined Storage System and Oil Test Centre from Kittiwake is used on the rigs to enhance the oil analysis program, these allow rig staff to undertake on-rig sampling and analysis of equipment lubricants. (but does not mitigate the need for a commercial laboratory). If the on-rig test centre is used, oil samples with non-conforming results may warrant further analysis of the sample at the commercial oil analysis laboratory for better analysis and results.

Sample Transportation

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Sample Transit Case

Adhoc Sample Kit

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Thruster Monitoring

Thruster Slew Bearing Failure

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Advantages of Continuous Oil & Vibration Monitoring

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Thruster Online Oil & Vibration Monitoring

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NDE axial

NDE radial

DE radial

Gear axial

Gear radial left

Gear radial right

Slew gearbox

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Thruster Online Oil & Vibration Monitoring

Prevention

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Prevention

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Approximately 50% of all costs related to breakdowns of machines with rotating shafts are caused by misalignment. Misalignment is a major cause of fatigue.

LCD Endoscope Monitoring

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Infrared Thermographic Monitoring

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24.3°C

29.3°C

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SP01

Object parameter Value

Emissivity 0.93

Object distance 1.5 m

Label Value

SP01 30.0°C

Fault

Infrared Thermographic Monitoring

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Sediment deposits

Note the temperature profile across the lower portion of the flange. The likely cause of this pattern of heat is sediment build up across the flange; which is most likely to occur in this way if

there is an orifice plate in use.

Infrared Thermographic Monitoring

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68.7 71.2

69.1

Pump A – Running at 42% speed Pump A – Running at 42% speed

67.1

71.1 67.5

Pump B – Running at 10% speed

72.2 61.8

62.8

Pump B – Running at 10% speed

44.1 58.5 58.2

Vibration Monitoring

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Vibration Monitoring

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Vibration Monitoring

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Cooler Fan Bearing Damage

Areas of Interest for Condition Monitoring

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Top-drive

Hydraulics

Mud-pumps

Draw works

Thrusters

Cranes

Fuel Delivery/Storage

Diesel Engines

Potable Water Boiler Water Cooling /Heating Water Effluent

Recommended Condition Monitoring Equipment

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Any Questions?? Thank You Bob Speirs Bob.speirs@deepwater.com