Page 6 - Air and gas Drilling Field Guide 3rd Edition

Contents vii

5.5.2 Multistage Shaft Power Requirements............................ 113
5.6 Prime Mover Input Power Requirements .................................115
5.6.1 Compressor System Units ............................................... 115
5.6.2 Reciprocating Compressor Unit ..................................... 117
5.6.3 Rotary Compressor System Unit..................................... 122
5.6.4 Fuel Consumption........................................................... 128
5.7 Example Compressor System Units...........................................134
5.7.1 Small Reciprocating Primary and Booster Compressor
System .............................................................................. 134
5.7.2 Four-Stage Reciprocating Compressor System............... 136
5.7.3 Rotary Primary and Reciprocating Piston Booster
Compressor System......................................................... 137
5.8 Membrane Field Nitrogen Generator ........................................139
5.8.1 Allowable Oxygen Concentrations................................. 140
5.8.2 Membrane Unit Efficiencies............................................ 141
References .........................................................................................143

CHAPTER 6 Direct Circulation Models ......................................145
6.1 Basic Assumptions......................................................................145
6.2 General Derivation .....................................................................147
6.2.1 Weight Rate of Flow of the Gas ..................................... 147
6.2.2 Three-Phase Flow in the Annulus................................... 149
6.2.3 Two-Phase Flow Through the Bit................................... 154
6.2.4 Two-Phase Flow in the Drill String ................................ 155
6.3 Aerated Fluid Drilling Model .....................................................157
6.4 Stable Foam Drilling Model........................................................158
6.5 Air and Gas Drilling Model ........................................................160
References .........................................................................................164

CHAPTER 7 Reverse Circulation Models ...................................165
7.1 Basic Assumptions......................................................................165
7.2 General Derivation .....................................................................167
7.2.1 Weight Rate of Flow of the Gas ..................................... 167
7.2.2 Three-Phase Flow in the Drill String .............................. 169
7.2.3 Three-Phase Flow Through the Bit................................. 174
7.2.4 Two-Phase Flow in the Annulus..................................... 175
7.3 Aerated Fluid Drilling Model .....................................................177
7.4 Stable Foam Drilling Model........................................................178
7.5 Air and Gas Drilling Model ........................................................178
References .........................................................................................182