Induction Heating at DownHole

MxL Induction Heating

Configuration

and

Completion

H

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iz

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t a l s y s t e m

A Power Conditioning Unit (PCU) is requiredto set and control reservoir temperature, logdownhole temperatures, pressure and other operating information.

MxL Induction Heating Systemcomponents:

An offset Tubing Hanger and Feed Through are requiredto connect the surface power cables to the downholeESP cable and provide a pressure seal between the annulus and atmosphere.

ESP Cable is banded to the tubing string fromthe feed through to the Side Outlet Sub. A splice is required at each end.

A Side Outlet Sub is required to transition the ESP cablefrom the side of the tubing to the connection at the Induction Heater. The pump suction pups are installed above the SoSub.

The Induction Heater consists of inductors in smooth wall steel casing togetherwith temperature sensors and a bottom hole pressure sensor. The picture shows a system in the shop hooked up with jumper wires for testing and calibration.

PRODUCINGZONE

PRODUCTION CASINGJ-55,177.8 mm,34.26 kg/m.

SURFACE POWER CABLE TOWELL HEAD

SURFACE CASING

POWER CONDITIONING UNIT (PCU)CONVERTS THREE PHASE SUPPLYTO THREE INDIVIDUALLY CONTROLLEDHEATING ZONES AT THE RESERVOIR.THE WAVE SHAPE AND FREQUENCY IS CONTROLLED TO MAXIMIZE THE DELIVERY OF ENERGY TO THE RESERVOIR IN ACCORDANCE WITH TEMPERATURE SETTINGS IN THE PCU

HEATED ZONEINDUCTOR SECTION A

HEATED ZONEINDUCTOR SECTION B

OFFSET TUBING HANGER CONFIGURED FOR ESP CABLE FEED THROUGH. SOME OPTIONS ARE: BIW MANDREL STYLE GENCO TRIPLE PENETRATOR PACK-OFF STYLE NICKLE PLATED COPPER GROUND LUG ATTACHED TO CASINGBOWL WITH #4 CONDUCTOR BACK TO PCU

DRAWN

CHK'D

APPR.

SCALE

PLOT

PROJECT NO.

CADD NO. DRAWING NO. REV.

ENGINEERING LTD CALGARY ALBERTA

REI NOT TO SCALE

1.0

MC300 MHC300 MHC-300-1

ELECTRIC HEATING ARRANGEMENT HORIZONTAL WELL

MADIS ENGINEERING LTD.CALGARY ALBERTA

MADIS ENGINEERING LTD. THE DESIGN AND INFORMATION PRESENTED BY THIS DOCUMENT ISPROPRIETARY TO MADIS AND MAY NOT BE REPRODUCED WITHOUT CONSENT OF MADIS

C

818.5 mKB

1193.8 mKB

Casing: 1225.6 mKB

2269.0 mKB

BAND ESP CABLETO TUBING

PUMP

PRODUCTION TUBING

PUMP SUCTION PUPS

ESP CABLE COLLAR PROTECTORSAROUND BEND

SIDE OUTLET SUB TO TRANSITIONESP CABLE FROM SIDE OF TUBINGTO TOP OF INDUCTION HEATER

OPEN HOLE COMPLETION

HEATED ZONEINDUCTOR SECTION C

JOIN FEED THROUGH AND SURFACECABLES IN JUNCTION BOX.DURING A WORKOVER THE CABLESARE DISCONNECTED AND THEFEED THROUGH CABLE PULLEDBACK THROUGH THE TUBING HANGER

INDUCTION HEATING TOOL CONSISTING OF 13 m LONGby 4.5 INCH DIAMETER JOINTS OF SMOOTH WALL CASINGCONTAINING INDUCTORS, TEMPERATURE AND PRESSURESENSORS. JOINTS ARE SCREWED TOGETHER WITH THE RIG TONGS AND ELECTRICAL CONNECTIONS ARE MADE INPORTS AT THE END OF THE JOINT. BLANK SECTIONSOF CASING MAY BE USED AS SPACERS IF REQUIRED.

This is a drawing showing how the horizontal Induction Heating System is configured

PCU installed in below ground bunkeron a military base. 100 KVA horizontal

50 KVA PCU in Bahrain

100 KVA PCU for a horizontal wellin Southeastern Alberta.

25 KVA PCUin Montana

25 KVA PCUin NortheasternAlberta

Typical PCU control panel withLCD to view set points and realtime formation temperatures andbottom hole pressure as well aspower, flow line temperature,flow rate, Amps, Volts, ambienttemperature and a full set ofinterlock data. The operatingdata are stored and may be downloaded to the floppy disk,SD card or transferred, in realtime, over a serial radio link.

A wellhead electricalfeed through thatseals the annulusmust be provided

A BIW well head penetrator with flat cable on the left, protective mesh over the O-ring seals and round cable on the right is shown in the above photo.

The photo at the left shows a BIW penetrator about to be installed in an offset tubing hanger.

The Genco penetrator, in some cases,may be installed in a regular tubing hanger

A pack-off style tubing hangermay be used as a feed throughto deliver electricity to the Induction Heater

ESP cable reel and spooler truck rigging-upwith cable sheave in derrick.

ESP cable sheave with cable in derrick

A joint of inductor in elevators, “tailed by picker crane”, being raised into derrick.

An electrical port is provided, at the end of eachjoint of inductor, for connection of wires.

The instrument circuit board andpressure sensor are housed in the“bullnose” at the end of the tool.

The temperatures and bottom holepressure signals are collected andthen transmitted to the PCU overthe ESP cable during delivery of power to the tool. Real time closedloop control of downhole temperatureis provided from the PCU.