This document provides details on configuring and completing a horizontal induction heating system. It includes: 1) An offset tubing hanger and feed through are required to connect surface power cables to the downhole ESP cable and provide a pressure seal. 2) An ESP cable is banded to the tubing string and connected to a side outlet sub to transition to the induction heater. 3) The induction heater consists of inductors in casing with sensors to monitor temperature and pressure during heating.

1. MxL Induction Heating
Configuration
and
Completion
H
o
r
i
z
o
n
t a l s y s t e m

2. A Power Conditioning Unit (PCU) is required
to set and control reservoir temperature, log
downhole temperatures, pressure and other
operating information.
MxL Induction Heating System
components:
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.

3. 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.

4. 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.

5. PRODUCING
ZONE
PRODUCTION CASING
J-55,177.8 mm,
34.26 kg/m.
SURFACE POWER CABLE TO
WELL HEAD
SURFACE CASING
POWER CONDITIONING UNIT (PCU)
CONVERTS THREE PHASE SUPPLY
TO THREE INDIVIDUALLY CONTROLLED
HEATING 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 ZONE
INDUCTOR SECTION A
HEATED ZONE
INDUCTOR 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 CASING
BOWL 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 IS
PROPRIETARY 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 CABLE
TO TUBING
PUMP
PRODUCTION TUBING
PUMP SUCTION PUPS
ESP CABLE COLLAR PROTECTORS
AROUND BEND
SIDE OUTLET SUB TO TRANSITION
ESP CABLE FROM SIDE OF TUBING
TO TOP OF INDUCTION HEATER
OPEN HOLE COMPLETION
HEATED ZONE
INDUCTOR SECTION C
JOIN FEED THROUGH AND SURFACE
CABLES IN JUNCTION BOX.
DURING A WORKOVER THE CABLES
ARE DISCONNECTED AND THE
FEED THROUGH CABLE PULLED
BACK THROUGH THE TUBING HANGER
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
TONGS AND ELECTRICAL CONNECTIONS ARE MADE IN
PORTS AT THE END OF THE JOINT. BLANK SECTIONS
OF CASING MAY BE USED AS SPACERS IF REQUIRED.
This is a drawing showing how the horizontal Induction Heating System is configured

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

7. 100 KVA PCU for a horizontal well
in Southeastern Alberta.
25 KVA PCU
in Montana
25 KVA PCU
in Northeastern
Alberta

8. 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.

9. 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.

10. 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

11. ESP cable reel and spooler truck rigging-up
with cable sheave in derrick.
ESP cable sheave with cable in derrick

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

13. 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.

14. 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.