November 12, 2007

A Brief Introduction to Coiled TubingWhat is it? What do we do with it?

Li Gao, PhD

Research DepartmentHalliburton

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Outline• Halliburton Company• Coiled Tubing history• What is it? Equipment• What do we do with it? Applications • PE vs. MD

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• Funded in 1919• Offers the world's broadest

array of products, services and integrated solutions for oil and gas exploration, development and production.

• $35B market cap, $22B revenue in 2006

• Employs 100,000 people in more than 120 countries

Halliburton Company

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CTAT Time LineCoiled Tubing History: Military Origin

• D-Day, Pluto Project

– Pipe Line Under The Ocean

– British engineers developed long, continuous pipeline to supply Allied forces

– Twenty-three 3” pipelines across the English channel– 30 to 70 miles long– Fabricated from 4000’ sections, Butt welded together

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Coiled Tubing History: Military Origin

• Submarines– Antenna Deployment System

• Developed by Bowen Tool• Deployed 5/8” polyethylene antenna to surface from

submerged submarine• Packer device to seal around antenna

– Evolved into Coiled Tubing Injector Head

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1st Coiled Tubing Work in the Oilfield

• California Oil Company, 1962• Bowen Oil Tool fabricated reel and equipment

– Reel: 1.315” O.D. Pipe, 50’ sections butt welded, 15000’ total length

– Used for washing out sand bridges on oil and gas wells

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Coiled Tubing Unit

Tubing

Injector

Tubing Guide

Reel

ControlHouse

Well Control Equip.

Crane

Power Pack

Stripper

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Tubing

• Steel pipe 1” OD to 3.5” OD• Yield strengths of 70,000, 80,000, 90,000, 100,000 psi• Relatively thin wall• Finite life due to fatigue cycles (bending)

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• Hydraulically powered counter rotating chains

• Gripper blocks mounted in chain assembly

• Injector designation based on maximum pull capability, e.g 30K can pull 30,000 pounds

Injector

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• Guides tubing into injector• Large radius for best tubing life

Tubing Guide (Guide Arch)

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• Used to store tubing• Large radius for best tubing life• Level wind assembly to wrap

tubing on and off reel

Reel

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• Operator station for unit control• Typically mounted behind reel

Control House

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Coiled Tubing: What do we do with it?

• Uncoiled into live oil and gas wells to perform maintenance operations

– placement of chemicals– cleaning– manipulation of mechanical tools– milling / drilling– logging / perforating

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CT Applications

For vertical, horizontal and deviated wells, both on land and offshore:

• Drilling

• Logging

• Perforating

• Stimulation

• Fluid displacement

• Sand control

• CT conveyed perforating

• Wellbore cleanout

• Remedial cementing

• Setting and retrieving bridge plugs

• Permanent installations

• Running packers

• CT as flowline

• Removal of wax, hydrocarbon or hydrate plugs

• Flow control of horizontal and deviated completions

• Fishing

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A Comparison between …

• Sand, hydrates, etc. deposits • Cholesterol plaque built up

• Well intervention • Percutaneous Coronary Intervention (PCI)

• Well intervention engineer using Coiled Tubing

GoFlo® Flow Remediation Service

• Stenotic coronary arteries• Clogged/blocked wellbore/pipeline

PE’s world MD’s world

• Interventional Cardiologist

Laser Angioplasty

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Just Need to Shrink the Whole Coiled Tubing System…

• Call Prof. Wayne Szalinski• Inventor of the incredibly powerful Shrinking Machine