INTRODUCTION TO DEEPWATER DRILLING TECHNOLOGY (NEXT NETWORK OF EXCELLENCE IN TRAINING)

Topics to be covered

• What is deepwater drilling? 
• Deepwater provinces - regional differences 
• Deepwater riser 
• Deepwater rigs and operations 
• High deepwater drilling costs and deepwater alternatives slim hole, dual mud gradient systems 
• Evolving deepwater drilling technology  – Deepwater field development concepts deep draft caisson vessel (DDCV-SPAR) vs. TLP (tension leg platforms) 
• Challenges of deepwater technology 
• Conclusions

Introduction

•What is “Deepwater?”
–This is an evolving notion

–Presently considered to be water depth deeper than 1500 ft, ultra-deepwater meaning > 5000 ft of water

•Where is deepwater drilling taking place?
–Present water depth drilling record: 9111 ft (Brazil 2000); 6592 ft 1998; 5700 1982)

–World water depth record for a producing well: 6080 ft (Roncador field, Brazil, 1999)

Unconsolidated Shallow Sediments

• 30” pipe is jetted in (with drill-ahead tool) 
• 30” pipe is structural, not conductor. Usually 80 to 100 m long 
• 20” pipe is conductor, not surface casing. It is run in open water (26” hole drilled riserless). 
• On mobile offshore drilling units (MODU), BOPs and marine risers are run on top, but no use of BOPs in 17-1/2” hole (No shut-in). 
• 13-3/8” casing acting as surface casing 
• Very low fracture gradients

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OVERVIEW - ROTARY STEERABLE SYSTEMS - SCHLUMBERGER

OVERVIEW - ROTARY STEERABLE SYSTEMS - SCHLUMBERGER

What is PowerDrive?

•3-D, fully steerable tool that makes changes to inclination and azimuth with continuous drillstring rotation

•No “sliding mode”

Overview - Video

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COORDINATE SYSTEMS AND DEFINITIONS (NEXT NETWORK OF EXCELLENCE IN TRAINING)

COORDINATE SYSTEMS AND DEFINITIONS (NEXT NETWORK OF EXCELLENCE IN TRAINING)

At the end of this lecture, YOU will be able to;

1. Name the most common map projection model and state the main error introduced by the model.
2. Demonstrate the correct use of Latitude, Longitude and depth datum to define positions on Earth’s surface and within the crust.
3. State the differences between the different North’s and correct magnetic readings to True North.
4. Describe what is meant by “ellipse of uncertainty” and “travelling cylinder”.
5. Convert positions between Absolute and relative coordinates.

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PDM MECHANICAL COMPONENTS (NEXT NETWORK OF EXCELLENCE IN TRAINING)

PDM MECHANICAL COMPONENTS (NEXT NETWORK OF EXCELLENCE IN TRAINING)

Positive displacement motors

At the end of this lecture, YOU will be able to:

1.  Name the 4 major components of a PDM tool.

2.  Explain the components of a PDM power section.

3.  List the components of a PDM drive line system

4.   Name the 2 types of PDM bearing sections and state when each should be used

5.   List the operational considerations for using PDM tools.

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INTRODUCTION TO DIRECTIONAL DRILLING (NEXT NETWORK OF EXCELLENCE IN TRAINING)

INTRODUCTION TO DIRECTIONAL DRILLING (NEXT NETWORK OF EXCELLENCE IN TRAINING)

•Lecture Contents

–Lecture Objectives,

–Definition,

–Well Types,

–Terminology,

–Applications,

–Basic Survey Calculation Methods,

–Directional Drilling Tools.

•Lecture Objectives

At the end of this lecture YOU will be able to:

–Define directional drilling techniques

–Identify well types,

–Describe the related terminologies,

–Understand the applications of directional drilling,

–List surveying and calculation methods,

–Describe Various BHAs and Downhole Tools.

Wellbore Survey

–Background

•Recently, technology have advanced in such away that the former directional drilling tools were replaced with an advanced ones such as:

–Steerable mud motors,

–MWD,

–Andergauge Stabilizers,

–LWD.

•These tools, in combination, could provide  a 3D well profiles without changing BHA and have enabled the drilling of horizontal and multi lateral wells.

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DRILLING FLUIDS TECHNOLOGY (NEXT NETWORK OF EXCELLENCE IN TRAINING)

DRILLING FLUIDS TECHNOLOGY (NEXT NETWORK OF EXCELLENCE IN TRAINING)

•Course Contents:

–Course Objectives,

–Basic Functions,

–Water & oil base muds,

–Formation damage,

–Completion fluids,

–Solids control,

–Environmental concerns,

–Performance testing.

•Course Objectives:

–At the end of  this course,YOU will be able to:

•List functions & properties of drilling  and completion fluis,

•Understand the formation damage

•Describe different fluids systems,

•Understand the solid control equipments

•Identify the environmental impact with drilling fluids. 

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DRILL BIT TECHNOLOGY (NEXT NETWORK OF EXCELLENCE IN TRAINING)

DRILL BIT TECHNOLOGY (NEXT NETWORK OF EXCELLENCE IN TRAINING)

•Lecture Contents;,

–Lecture Objectives,

–Drill Bit Types,

–Bit Design,

–Bit Selection,

–Bit Evaluation,

–Bit Performance,

•Lecture Objectives;

–By the end of this lecture YOU should be able to:

•Recognize different bit types,

•Describe various process of bit design with respect to roller cone bits and PDC bits,

•Select bits for various formation types and drilling conditions,

•Grade bits using the IADC Dull Grading System,

•Utilize the IADC code to describe and compare bits,

•Identify important operational aspects that effect bit performance,

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DRILLSTRING DESIGN, RIG SUZING, WELLHEAD SYSTEMS, PLUG AND ABANDON (NEXT NETWORK OF EXCELLENCE IN TRAINING)

DRILLSTRING DESIGN, RIG SUZING, WELLHEAD SYSTEMS, PLUG AND ABANDON (NEXT NETWORK OF EXCELLENCE IN TRAINING)

•Course Contents

1.Objectives

2.Functions of drillstring components

3.Grades and strength  properties of drillpipe

4.Drillcollar weight and neutral point

5.Drillstring design methods incl. MOP

6.Drillstring damage and inspection

7.Rig sizing considerations

8.Wellhead components

9.Plug and Abandon considerations

•Objectives

At the end of this lecture YOU will be able to:

• List drillstring components and describe functions
• Define grades and strength properties
• Calculate drillcollar weight for required WOB
• Design drillstring in vertical wells
• Describe drillstring damage and inspection methods
• Perform rig sizing calculations
• List wellhead functions and components
• Describe P&A considerations

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WELL CONTROL EQUIPMENT (NEXT NETWORK OF EXCELLENCE IN TRAINING)

WELL CONTROL EQUIPMENT (NEXT NETWORK OF EXCELLENCE IN TRAINING)

Rams

Variable Bore Rams

1.The Variable Bore Ram, or VBR, seals on several sizes of pipe or hexagonal kelly within its specified size range. A typical range is from 5" to 3-1/2" diameter Other size ranges, such as 7" to 4-1/2" diameter, are available upon request.

2.VBRs are not intended for long-term stripping use.

3."Stripping" refers to moving drill pipe vertically within the well while the BOPs remain closed, maintaining a seal around the pipe.

4.During stripping, the drill pipe and larger diameter tool joints are pulled through the packers in fully closed rams. This procedure is typically used in workover and servicing operations using annular BOPs and specialty rams.

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BASIC WELL CONTROL (NEXT NETWORK OF EXCELLENCE IN TRAINING)

BASIC WELL CONTROL (NEXT NETWORK OF EXCELLENCE IN TRAINING)

•Lecture Contents;

–Lecture Objectives,

–Introduction,

–Primary Control,

–Warning Signs of Kicks,

–Secondary Control,

–Well Killing Procedures,

–Kill Sheet.

•Lecture Objectives

–At the end of this lecture YOU will be able to:

•Define the term “kick”,

•State warning signs of a kick,

•Describe the drawback of uncontrolled kicks,

•State primary and secondary control procedures,

•List well killing procedures and the various calculation to fill-up the well control work sheet.

•Introduction;

–In simple terms, kick occur when the formation pressure exceeds the mud hydrostatic pressure,

–The resultant negative differential pressure is forced into the wellbore,

–If the flow of the kick is controlled then the well is killed,

–Blow-out occurs when the kick (influx) is uncontrolled,

–The rig crew must be alert all times in order to take immediate action to bring the well under control.

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