Page 4 - Air and gas Drilling Field Guide 3rd Edition

Contents

Preface .....................................................................................................................xi

CHAPTER 1 Introduction and Units ...............................................1
1.1 Objectives and Terminology..........................................................1
1.2 Engineering Calculations and Units...............................................2
1.2.1 Physical Mechanics.............................................................. 3
1.2.2 Basic Units and Usage ......................................................... 3
References .............................................................................................7

CHAPTER 2 Air and Gas Versus Mud ............................................9
2.1 Rotary Drilling..............................................................................10
2.2 Circulation Systems......................................................................16
2.2.1 Direct Circulation.............................................................. 16
2.2.2 Reverse Circulation ........................................................... 17
2.3 Comparison of Mud and Air Drilling...........................................20
2.3.1 Advantages and Disadvantages.......................................... 21
2.3.2 Flow Characteristics.......................................................... 24
2.3.3 Borehole Cleaning ............................................................. 31
References ...........................................................................................34

CHAPTER 3 Surface Equipment ..................................................35
3.1 Drilling Location...........................................................................35
3.2 Flow Line to the Rig ....................................................................38
3.2.1 Bleed-Off Line .................................................................... 38
3.2.2 Scrubber............................................................................. 38
3.2.3 Water Injection Pump ....................................................... 38
3.2.4 Solids Injector.................................................................... 39
3.2.5 Valves ................................................................................. 39
3.2.6 Gauges................................................................................ 39
3.2.7 Volumetric Flow Rate Meters ........................................... 40
3.3 Wellhead Equipment....................................................................43
3.3.1 Rotating Head .................................................................... 43
3.3.2 Blowout Prevention Stack................................................. 48
3.4 Flow Line from Rig ......................................................................52
3.4.1 Blooey Line ........................................................................ 53
3.4.2 Burn Pit.............................................................................. 54
3.4.3 Primary and Secondary Jets .............................................. 54