Induction Heating At Downhole

MxL H

Induction Heating Configuration

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MxL Induction Heating System components:

A Power Conditioning Unit (PCU) is required to set and control reservoir temperature, log downhole temperatures, pressure and other operating information.

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

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

A Side Outlet Sub is required to transition the ESP cable from 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 together with 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.

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 CASING BOWL WITH #4 CONDUCTOR BACK TO PCU POWER CONDITIONING UNIT (PCU) JOIN FEED THROUGH AND SURFACE

CONVERTS THREE PHASE SUPPLY

CABLES IN JUNCTION BOX.

TO THREE INDIVIDUALLY CONTROLLED

DURING A WORKOVER THE CABLES

HEATING ZONES AT THE RESERVOIR.

ARE DISCONNECTED AND THE

THE WAVE SHAPE AND FREQUENCY

FEED THROUGH CABLE PULLED

IS CONTROLLED TO MAXIMIZE THE

BACK THROUGH THE TUBING HANGER

DELIVERY OF ENERGY TO THE RESERVOIR IN ACCORDANCE WITH TEMPERATURE SETTINGS IN THE PCU

BAND ESP CABLE

SURFACE CASING

TO TUBING

SURFACE POWER CABLE TO WELL HEAD

PRODUCTION CASING PRODUCTION TUBING

J-55,177.8 mm, 34.26 kg/m. PUMP

ESP CABLE COLLAR PROTECTORS AROUND BEND SIDE OUTLET SUB TO TRANSITION ESP CABLE FROM SIDE OF TUBING

OPEN HOLE COMPLETION

TO TOP OF INDUCTION HEATER PUMP SUCTION PUPS Casing: 1225.6 mKB

HEATED ZONE PRODUCING

INDUCTOR SECTION A

ZONE

HEATED ZONE INDUCTOR SECTION B

HEATED ZONE INDUCTOR SECTION C

818.5 mKB 2269.0 mKB

1193.8 mKB INDUCTION HEATING TOOL CONSISTING OF 13 m LONG by 4.5 INCH DIAMETER JOINTS OF SMOOTH WALL CASING CONTAINING INDUCTORS, TEMPERATURE AND PRESSURE SENSORS. JOINTS ARE SCREWED TOGETHER WITH THE RIG C

TONGS AND ELECTRICAL CONNECTIONS ARE MADE IN

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

PORTS AT THE END OF THE JOINT. BLANK SECTIONS

ELECTRIC HEATING ARRANGEMENT HORIZONTAL WELL

OF CASING MAY BE USED AS SPACERS IF REQUIRED. ENGINEERING LTD CALGARY ALBERTA

MADIS ENGINEERING LTD. CALGARY

DRAWN REI

SCALE

NOT TO SCALE

CHK'D

PLOT

1.0

APPR.

PROJECT NO.

MC300

CADD NO.

MHC300

ALBERTA DRAWING NO.

REV.

MHC-300-1

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

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

50 KVA PCU in Bahrain

100 KVA PCU for a horizontal well in Southeastern Alberta.

25 KVA PCU in Montana

25 KVA PCU in Northeastern Alberta

Typical PCU control panel with LCD to view set points and real time formation temperatures and bottom hole pressure as well as power, flow line temperature, flow rate, Amps, Volts, ambient temperature and a full set of interlock data. The operating data are stored and may be downloaded to the floppy disk, SD card or transferred, in real time, over a serial radio link.

A wellhead electrical feed through that seals the annulus must 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 hanger may be used as a feed through to deliver electricity to the Induction Heater

ESP cable reel and spooler truck rigging-up with 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 each joint of inductor, for connection of wires.

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

The temperatures and bottom hole pressure signals are collected and then transmitted to the PCU over the ESP cable during delivery of power to the tool. Real time closed loop control of downhole temperature is provided from the PCU.