Indroduction

What Is Corrosion

Corrosion in Metals

Detection of Corrosion Metals

Mitigation of Corrosion

Cathodic Protection

Types of Cathodic Protection

Transformer Rectifiers

Surface Anode Ground Beds

Applications

Criteria for CP

100 mV Potential Criteria1400 1200 1000 800 600 400 200 01400 1200 1000 800 600 400 200 0

Polarization Decay

Current Density( At 300 C, 25% Increase in Every 100 C )

General Arrangement Of Equipment

Anode Lead Junction Box

Typical Stray Current

Potential Testing of Foreign Structures

Interference Vs. Potential Values

General Phases Of CP Program

ADCO CP Project

ADCO Contract No. 5922.01/EC

Basic Design Philosophy

Limitations Of Cathodic Protection In Oil & Gas Wells

Electrical Isolation

CP Current Requirement

Corrosion Potential Evaluation Tool (CPET) Logging

CPET Tool and Logs

E-log-i Testing

CP Current Attenuation0 -1,000 -2,000

-3,000

-4,000

-5,000

-6,000

-7,000

-8,000 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0

Current Density Per Segment0 -1,000 -2,000

-3,000

-4,000

-5,000

-6,000

-7,000

-8,000 0.00

0.25

0.50

0.75

1.00

1.25

1.50

1.75

2.00

Groundbed Details

Preferred Groundbed Location

Determining Borehole DepthsMegger14.00 12.00 10.00 8.00 6.00 4.00 2.00

Drill Rig

Wellhead

0.00 3 6 9 12 15 18 21 24 27 30 33 36 39 42 45 48 51 54 57 60

Drill Rigs

Deep Anode Groundbed Details

Cross Section Of Deep Anode Groundbed

Titanium / MMO Anodes

Coke Breeze Backfill

Anode / Vent Pipe Loading

Deep Anode Installation Rig

Coke Breeze Pumping Operation

Power Supplies

Transformer Rectifiers

Solar Power Supplies

Solar Power Controller

Storage Batteries

Negative Connection To Well

Special Tools

Project CP Criteria

Assessment Of CP Current To Casing

Commissioning Activities

General Safety

PPE And Safety Equipment

Safety Hazards

Testing

Routine Testing

AC Input Measurement Of Rectifier

DC Current Output Of Rectifier

DC Voltage Output of Rectifiers

Measure and Balance CP Current To Well Casings (Dual Sites)

Tap Adjustment Of Rectifier

Correct

Wrong

Electronic Components Of Solar Controller

Solar Power Alarm Settings

Controller Alarm LEDs

CP Controller Adjustments

Normal Operating Display

Shunt Ratings

Shunt Rating / ConversionsEQUIPMENTSHUNT RATING

CONVERSION

Anode Current Measurements

Flowline Current Measurements

Interrupting Current Output of Rectifier

Sample Interference Test DataTest Location P/S Potential (mV)On Off Change

Results

Set-up and Down Loading of Data Loggers

Data Logger on Rectifiers

Rectifier Data Logger Connection

Set-up of Rectifier Data Logger

Data Logger Set-up Window(General)

Communication Type Codes (Unique 5 Digit No.)

Data Logger Set-up Window (Channel Tab)

Data Logger Set-up Window(Rectifier Tab)

Data Logger Set-up Window(Recording Tab)

Down Loading Data Logger (Status and Tools Window)

Down Loading Data Logger(Auto Report Window)

Generating Report

Sample Rectifier Data Logger ReportRMU SYSTEM (by RCS) SITE REPORT CUMULATIVE SITE NAME: COMMUNICATION No.: COMPANY: ADDRESS: DESCRIPTION: RECTIFIER No: RELAY NO.: MANUFACTURER: MODEL SERIAL NO.: CLASS: RATING: Bb-123 6 ADCO Cluster 21

1 of 1 1 Corrpower CSAY 30 -25 123456 Nema 3R 30 Volt / 25 Amp

Title: , Interrupter: Idle, Type: On, Start: Scheduled, Transfer Time: 07/23/04 13:19 01 01 01 02 02 Date / Time Min. Ave. Max. Min. Ave. (V DC) (V DC) (V DC) (V DC) (V DC) 7/21/2004 / 10:00:00 AM 7/21/2004 / 11:00:00 AM 7/21/2004 / 12:00:00 PM 7/21/2004 / 1:00:00 PM 7/21/2004 / 2:00:00 PM 7/21/2004 / 3:00:00 PM 5.75 5.82 5.75 5.82 5.75 5.82 5.88 5.91 5.88 5.91 5.88 5.91

02 Max. (V DC) 6.01 6.12 6.01 6.12 6.01 6.12

03 Min. (A DC) 15.22 15.31 15.22 15.31 15.22 15.31

03 Ave. (A DC) 15.65 15.81 15.65 15.81 15.65 15.81

03 Max. (A DC) 15.87 15.98 15.87 15.98 15.87 15.98

Down Loading of Solar Power Data Logger

Solar Power Data Logger Connection

Download Menu

Sample Readout of Solar Power Data LoggerSite: Date Bu191 Time Regulator Status CP V Operator: Anis CP Status RC V DI S H V A LV A LV D AY 1 Downloaded: Alarms AY 2 L C F A R F C P B S T S 29-Jul-2004 at 09:30yyyy-mm-dd hh:mm

Mode

BV

Temp

AI

LI

CP I

Maintenance

Routine Maintenance

Trouble Shooting

Problem of TR System

AC Power Problem

No DC Voltage

DC Voltage But No DC Current From T/R

Dummy Load Across Power Supply

Internal Transformer Rectifier Problems

Isolate Problem Of Solar System

Solar Panels

General Problems With Solar Controllers

Solar Power Supply Schematic

The

schematic diagram in the O & M manual will assist trouble shooting procedures.

Problems With Input Power

Problems With Charge Controller

Problems With CP Controller

Batteries

Anode With Low Output

Open DC Output Circuit

High Circuit Resistance