JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

Prerequisites

Elements of Mechanical Engineering, Chemical Engineering Fluid Mechanics

Course Objectives:

• To understand various aspects involved in drilling a well including completion.
• To understand the plan of drilling a well, the process of drilling and various equipment used for drilling and design of the drill string.
• To know the drilling fluid importance and its properties and hydraulics.
• To understand different types of casings lowered in a well, the requirement of cementation in a well and cement slurry design.
• To understand different tools used for directional drilling and various techniques, fishing, stuck pipe and well control concepts.

Course Outcomes

The students will be able to

• apply the drilling concepts of a well from planning to rig mobilization to the location
• apply the concept of a drill string design for drilling
• decide the suitable drilling fluids during drilling
• do Casing and Cementation design
• carry out Directional drilling
• manage rouble shoot well control, stuck pipe and fishing problems
• to select the proper drilling equipment.

UNIT - I

Overview of drilling: Drilling plan- GTO -Types of drilling, Rotary bit technology- Drilling string basics. Drilling fluid properties- Drilling fluid hydraulics calculations- Bit Hydraulics- Optimization- Swab & Surge-pressures- Mud hydraulics analysis report- Lost circulation. Disposing of the drilling fluids waste and drill cuttings waste.

UNIT - II

Hydrostatic pressure, Pore pressure, Causes of abnormal pore pressure, abnormal pore pressure evaluation- Mud logging methods - Measurement while drilling & logging while drilling data-Direct measurements of pore pressure. Formation integrity tests – Fracture gradient determination – Theory of wellbore – FIT procedural Guidelines – Predicting fracture gradient HPHT well design.

UNIT - III

Wellbore stability–Determination of the magnitude and direction of the in situ stress Determination of rock properties, Failure criteria – Stress distribution around a wellbore Procedure for determining safe mud weights to prevent hole collapse Preventing borehole instability Gas behavior in a well – Kick tolerance How to calculate kick tolerance – Influence of FG on kick tolerance – Kick tolerance while drilling – Kick tolerance graph –

R16 B.TECH PETROLEUM ENGG.

Modifying the calculate kick tolerance – Use of kick tolerance to calculate wellbore pressures.

UNIT - IV

Casing Functions of casing – Types of casing – Casing properties Casing specifications – Casing connections – Factors influencing casing design – Collapse criterion – Burst criterion – Combination strings – Tension criterion Compression loads – Biaxial effects – Triaxial analysis – Triaxial load capacity diagram Casing seat selection method. Cementation: Introduction cement slurries-Typical field calculations- Cementing nomenclature- Cement additives – Cementation of liners.

UNIT - V

Directional drilling: Applications- Well planning- Down-hole motors- Deflection tools and techniques- Face orientation- Direction control with rotary assemblies- Navigation drilling systems. Horizontal wells: Well profile design considerations – Torque and drag – Horizontal borehole stability – Extended reach well design – Multilateral wells. Stuck pipe, well control: Kicks- Kick control- Pressure control theory- BOP-Special kick problems and procedures to free the pipes and Fishing operations. Types of fishing tools, Case studies of blow out control.

TEXT BOOKS:

• 1. Petroleum Engineering: Drilling and Well Completion, Carl Gatlin, Prentice-Hall, Inc., 1960.
• 2. Drilling Engineering, J.J. Azar and G. Robello Samuel, Pennwell Books, 2007.
• 3. Working Guide to Drilling Equipment and Operations, William Lyons, Gulf Publishing, 2009.

REFERENCE BOOKS:

• 1. Oil Well Drilling Engineering: Principles and Practice, H. Rabia, Graham & Trotman, 1985.
• 2. Drilling Engineering: A Complete Well Planning Approach, Neal Adams, Tommie Charrier Pennwell, 1985.
• 3. Practical Well Planning and Drilling Manual, Steve Devereux, Pennwell, 1998.
• 4. Primer of Oil Well Service, Workover and Completion, Petroleum Extension Service, University of Texas at Austin, 1997.
• 5. Formulas and Calculation for Drilling, Production and workover, Norton J. nd Lapeyrouse, 2 Edition, Gulf Publishing, 2002.
• 6. Applied Drilling Engineering, Adam T. Bourgoyne Jr., Keith K. Millheim, Martine E. Chenevert and F. S. Young Jr., Society of Petroleum Engineers, 1991.
• 7. Well Engineering and Construction, Hussain Rabia, Entrac Consulting, 2002.
• 8. Drilling Fluids Processing Handbook, ASME Shale Shaker Committee, Gulf Professional Publishing, 2005.
• 9. Fundamentals of Drilling Engineering, Robert F. Mitchell, Stefan Z. Miska, Society of Petroleum Engineers, 2011. R16 B.TECH PETROLEUM ENGG.