WELL CONTROL MANUAL - LOUISIANA STATE UNIVERSITY

 

Chapter 1

DRILLING AND COMPLETION FLUIDS

          Preparation and maintaining of drilling fluids is based on the functions that the fluids must accomplish. Some general fluid properties, such as density and viscosity, together with specific characteristics unique to drilling fluids, such as filtration control and lubricity, have direct impact on the function of the mud. For example, density dictates the hydrostatic pressure exerted over a formation. Viscosity and density dictate the ability of fluid to carry cutting out of the wellbore, etc. the purposes of the chapter are to present (1) the primary functions of the drilling fluids, (2) the diagnostic test procedures used to determine whether the drilling fluid has suitable properties for performing these functions, and (3) the common additives used to obtain the desirable properties under various well conditions. .....

 

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INTRODUCTION TO DEEPWATER WELL CONTROL (NEXT - NETWORK OF EXCELLENCE IN TRAINING)

At the end of the lecture, you should be able to: 

1. Describe the key aspects of well control in deepwater operations

Deepwater well control

• Define Deepwater Well control? 
• When can it occur? 
• Why,how, can it occur? 
• What are the hazards, risks, probability and consequence of well control incidents? 
• What plans and processes will be used to manage and control well control incidents? 
• Are all aspects “fit for purpose” ? 

Deepwater special considerations

• Preparing to kill a well 
• Well control with bit off bottom 
• Well control with bit on bottom 
• Volumetric stripping operations 
• Kill with no pipe in hole 
• Circulating gas from riser and BOP’s 
• Bullheading operations 
• Shearing pipe 
• Shallow well control 
• Lost circulation

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DEEPWATER EQUIPMENT SYSTEMS (NEXT NETWORK OF EXCELLENCE IN TRAINING)

At the end of the lecture,you will be able to: 

1. Appreciate the various type of equipment systems used in deepwater operations

Offshore Rig Equipment

• Work boats 
• Tubular and riser handling equipment 
• Compensation equipment 
• Elevating equipment or Station keeping 
• Mud system 
• Subsea equipment 

                  –  Remote operated vehicles (ROV’s)
                  –  Wellheads, templates, manifolds
                  –  Xmas trees BOPs

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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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