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Benefits

Decreased risk of electrical

interference between ESP and

downhole gauge

Reduced rig time with better

completion design

Increased reliability of motortemperature sensor

Eliminated need for additional

downhole cabling and equipment

to monitor ESP system

Measured additional and

redundant parameters

Well background and challenges

Obsolete equipment

Electrical interference between the

ESP and the downhole gauge ESP trips because of bad data

Baker Hughes solution and results

SureSENS 125 permanent downhole

monitoring system

SureFlo 298 flowmeter system

WellLIFT E ESP monitoring system

Reduced risks of ESP downtime

Old equipmentA major North Sea operator has used Baker Hughes

electrical submersible pumping (ESP) systems and

permanent downhole gauges for more than

10 years. The systems were configured across a

venturi flowmeter and used on a project with more

than 20 wells.

The downhole gauge instrumentation collected

critical pressure and temperature data and used

the data to calculate accurate and reliable flow

rates. The downhole gauges also protected the

ESP systems from failures. They warned the the

operators when an ESP was either overheating or

operating outside of its design parameters.

As anticipated, the equipment had a finite life

cycle and began to produce electrical interference

between the ESP and the downhole gauge. The

instrumentation was also producing bad data that

caused the ESPs to be tripped.

New technologyIn 2008, Baker Hughes identified the biggest

problem was the age of the system and equipment.

Upgrading the technology would address the

equipment obsolescence and eliminate the other

problems that were occurring.

After discussions about new Baker Hughes

technologies, the operator selected a downhole

instrumentation technology that would also bepart of the design of the upper completion.

Tubing

SureSENS 125 Gauge andSureFlo 298 Flow Meter

Packer withFeed-through

ESP Pump

WellLIFT DischargeGauge Unit

Mono-conductor TECinternally connected to ESP cable

ESP Ported Headand Seal Assembly

ESP Motor

WellLIFT MotorGauge Unit

Cable Splice

ESP Cable

Mono-conductor TEC

TEC Cable (TubingEncapsulated Cable)

C a s e H i s t o r y

Advanced Technologies ResolvedESP Monitoring ProblemsBaker Hughes reduced rig time with effective completions design

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The operator decided that the existing ESP technology would remain

the same, but the downhole gauge architecture would change. The

operator selected the following Baker Hughes technologies:

SureSENS125 downhole gauges to provide accurate pressure

and temperature data for the life of the project

SureFlo298 flowmeter system to give real-time production

data without affecting recovery potential

WellLIFT EESP monitoring system to supply downhole, surface

and diagnostic parameters, enhance system management, and

prolong the equipment life

Both the operator and Baker Hughes wanted to make sure the

proposed new technology would meet the future requirements

for the surface equipment. To avoid the problems associated with

integration into the nearly full, existing system, a new, separate

system was implemented.

The new system used the same Baker Hughes software and

allowed the data from the SureSENS 125 gauge and WellLIFT ESP

monitoring system to be collected in a single place before being

handed off to the clients control and database systems.

Using the new technologies, the customer has worked over a

number of wells and confirmed a significant increase in overall

system reliability.

Real-time productiondata with the SureFlo 298

flowmeter system.

WellLIFT ESP monitoring system.

2011 Baker Hughes Incorporated. All rights reserved. 30690

www.bakerhughes.comDisclaimer of Liability: This information is provided for general information purposes only and is believed to be accurate as of the date hereof; however, Baker Hughes Incorporated and its affiliates donot make any warranties or representations of any kind regarding the information and disclaim all express and implied warranties or representations to the fullest extent permissible by law, includingthose of merchantability, fitness for a particular purpose or use, title, non-infringement, accuracy, correctness or completeness of the information provided herein. All information is furnished as isand without any license to distribute. The user agrees to assume all liabilities related to the use of or reliance on such information. BAKER HUGHES INCORPORATED AND ITS AFFILIATES SHALL NOT BELIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, PUNITIVE, EXEMPLARY OR CONSEQUENTIAL DAMAGES FROM ANY CAUSE WHATSOEVER INCLUDING BUT NOT LIMITED TO ITS NEGLIGENCE.