An Investigation on Multi Lateral Drilling

By

ACKNOWLEDGEMENT

My thanks go out to all who have helped me complete this study and with whom this project may have not been possible. In particular, my gratitude goes out to friends, facilitator and family for extensive and helpful comments on early drafts. I am also deeply indebted to the authors who have shared my interest and preceded me. Their works provided me with a host of information to learn from and build upon, also served as examples to emulate.

DECLARATION

I [type your full first names and surname here], declare that the contents of this dissertation/thesis represent my own unaided work, and that the dissertation/thesis has not previously been submitted for academic examination towards any qualification. Furthermore, it represents my own opinions and not necessarily those of the University (Gordon, 2009,, 1).

Signed __________________ Date _________________

ABSTRACT

In this study we try to explore the concept of Horizontal and direct drilling which is also called HDD, furthermore this study will also the implications of multi lateral drilling. This study will further discuss the advantages and disadvantages of drilling and will also talk about its applications. The method of the research is qualitative, and the type of research is secondary. The findings are based on literature review and case studies.

Table of Contents

ACKNOWLEDGEMENTII

DECLARATIONIII

ABSTRACTIV

CHAPTER 1: INTRODUCTION1

Introduction to drilling1

Drilling3

Drill Holes:6

Types of Drills:6

Removals:7

Cementation:7

Logging:7

Completion:8

Research Statement8

Research Questions9

CHAPTER 2: LITERATURE REVIEW10

Drilling tools11

Operating Variables13

New Technology in Drilling13

Radial Drill Presses14

Fixed Head Drill Presses16

Specialty Drilling Presses18

Cross Slide Vice18

Angle Vices18

Drill Press Vices18

Drill Press Support19

Bits & Accessories19

Twist and Brad Point Brill Bits19

Spade & Forstner Bits20

Pre - drilling holes screw21

Plug cutters22

Push and punch diameter22

Penetration rates22

CHAPTER 3: HORIZONTAL AND DIRECTIONAL DRILLING (HDD)24

Use of Directional Drilling25

Horizontal Drilling and its Uses34

Applications38

Advantages42

Disadvantages43

CHAPTER 4: MULTILATERAL DRILLING45

Multilaterals47

Multilateral Terminologies48

Reasons for Drilling Multilaterals49

CHAPTER 5: CASE STUDIES51

Saudi Arabia51

Marcellus Shale (U.S)54

CHAPTER 6: FINDINGS AND ANALYSIS57

Planning a Directional Well57

Determining Directional Well Plan58

Planning Horizontal Wells59

CHAPTER 7: CONCLUSIONS64

Technical and economic advantages65

REFERENCES67

List of figures

Figure: Multiple Sidetracks

Figure: Straight Hole Drilling

Figure: Multiple Wells from an Artificial Structure

Figure: Drilling Multiple Sands from a Single Wellbore

Figure: Inaccessible Location

Figure: Fault Drilling

Figure: Salt dome

Figure: Relief Well Drilling

Figure: Horizontal Drilling

Figure: Multilateral Wells Drilled From a Platform

Figure: Extended Reach Drilling Definition after Mobil

Figure: Extended Reach Wells Drilled By BP

Figure: Basic Hole Pattern for a Type I Well

Figure: Basic Hole Pattern for a Type II Well

Figure: Basic Hole Pattern for a Type III Well

Figure: Basic Hole Pattern for a Type IV Well

Figure: Horizontal Drilling Activity from 1984 to 1988

Figure: Horizontal Drilling Activity to the Year 2000

Figure: Multilateral Well Terminologies

Figure: Multilateral Well Classification System

Figure: Horizontal wells and Vertical Wells drilled in PA

Figure: Example of a Planned versus Actual Horizontal Well where Geology is Uncertain

Figure: Placement of a Horizontal Wellbore in a Fractured Formation

Figure: Multilateral Well Classification System

Figure: Sidetracking a Stuck Bottom hole Assembly.

CHAPTER 1: INTRODUCTION

Introduction to drilling

The only way to really know if there is oil on the site where the research proposes geological could locate a deposit of oil is by drilling a well.

The depth of a well varies, depending on the region and the depth to which is the structure or geological formation likely to ...