sdsd

Education

Drill String Design

This 3-Days course is designed for drilling operational staff and drilling engineers. The course provides a comprehensive treatment of drill string design as well as the avoidance of operational problems and wear on equipment following the API recommended practices for design and operating limitations as well as the standard DS1 for design and inspection

Drill String Design

Instructor: Dr. Qamar J. Sharif

This 3-Days course is designed for drilling operational staff and drilling engineers. The course provides a comprehensive treatment of drill string design as well as the avoidance of operational problems and wear on equipment following the API recommended practices for design and operating limitations as well as the standard DS1 for design and inspection. Day 1 starts with refreshing the engineering fundamentals and developing a sound understanding of the practical aspects and necessary considerations for design. These elements are put into practice and reinforced with a range of classroom exercises to consolidate the learning.On the second and third days, the emphasis is on practical engineering calculations and safe operating procedures. Industry standards are used as training aids to supplement the presentation material and provide a thorough understanding of the subject.

 

What will this course cover?

The course will start with basic engineering concepts leading to the properties of steel, Hooke's Law, and Thermal Stress. Participants will gain knowledge about axial forces and buckling in submerged tubulars with practical exercises. Participants will also learn about the manufacturing process of Drill Pipe including connections and make up torque. A review of the Drill String dynamics, BHA components, design factors and limitations including BHA applicability in directional wells, stabilization principles, and effects of stiffness and WOB will be discussed. Types of damage which may occur during operations and handling will be discussed. Detailed review of tables, curves and technical data of DS-1 will be followed by fatigue design, overload cases and class exercises.

 

What will you learn? Who will benefit

On completion of this course you will be able to fully understand the following:

  • Principles of Drill String Design
  • Drill String Components
  • Combination Strings
  • Drill String design calculations for vertical and deviated wells
  • Bending stresses and Buckling
  • Neutral Point
  • String stretch calculations
  • Drill String Failures and Prevention
API Recommended Practices for Drill String Design and Operating Limits

The following oil & gas company personnel will benefit from the knowledge shared in this course:

  • Drilling Engineers
  • Rig managers
  • Drilling Superintendents
  • Drilling Supervisors / Foremen
  • Directional drillers
  • Tool Pushers
  • Drilling Managers
  • Manufacturers of Drill String Components
  • Service Companies Personnel

 

References:

  • API RP7G Drill String Design and Operating Limits
  • API SPEC 7 Specifications for Rotary Drilling Elements
  • API SPEC 5D Specifications for Drill Pipe
  • DS-1 Drill String Design 

 

Outline for 3 Days Course: Drill String Design

DAY 1 DAY 2 DAY 3

Introduction to Drill String Design

  • Overview
  • Purpose of Drill String
  • Drill String Components
  • Drill Pipe Descriptions
  • Bottom Hole Assembly (BHA)
  • Exercise
  • Weight on Bit Design

Mechanical Properties of Drill String

  • Basic Concepts
  • Deformation and Elongation
  • Hook’s Law
  • Moment of Inertia
  • Yield Strength
  • Collapse Pressure
  • Burst Pressure
  • Safety Factors
  • Maximum Over Pull (MOP)

Drill String Dynamics

  • Torque and Drag
  • Free body diagram
  • Buoyancy
  • Forces on Submerged Tubular
  • Shock Loading and Stick Slip

Calculations for Drill String Design

  • Stiffness
  • Weight on Bit (WOB)
  • Neutral Point
  • Buckling
  • Axial Forces and Buckling in Submerged Tubular
  • Exercise

API RP7G

  • Introduction
  • Drill String Design
  • Operating Limits

Jars

  • Purpose of Jars
  • Types of Jars
  • How Jars Work
  • Use of Jars
  • Exercises

Drill Pipe Specifications

  • Steel Grade
  • Types of Connections (Tool Joints)
  • Classification
  • Exercises

BHA Selection Process

  • Drill Collars
  • Heavy Weight Drill Pipes
  • Drill Pipes
  • Bending Stiffness
  • Stress Relief

Drill String Failures and Prevention

  • Types of Failures
  • Thermal Stresses
  • Fatigue and Overload
  • Inspection
  • Care and Prevention

Overview of DS-I

  • Technical Data
  • Tables
  • Exercises

Advances in BHA Components

  • Adjustable Gauge Stabilizers
  • Rotary Steerable Systems (RSS)
  • Hybrid RSS