TABLE OF CONTENTS This program calculates the required gas injection volumetic flow rate in order to obtain a bottom hole annulus pressure of 2317.4 N/cm 2 gauge while drilling at 3048 m of depth. Utilizes the Hegendom and Brown liquid hole-up correlation.
| q a := 8.5 | air compressor flow rate (scm/min) iterate value |
| q f := 12.05 | mud flow rate (L/sec) |
| ? f := l.2 | specific gravity of mud (water = 1.0) |
| ? air := 0.012 | viscosity of air (centipoises) |
| ? mud := 30 | viscosity of mud (centipoises) |
| | aerated fluid flow loss coefficient through nozzles |
| D c := 2134 | total depth of cased hole (m) |
| D oh := 915 | total length of open hole (m) |
| alt := 1220 | elevation of drilling site (m) |
| p o := 0.08629 | pressure from table for elevation (MPa) |
| t o := 15.56 | temperature from table for elevation (deg C) |
| p at := 0.08629 | actual given atmospheric surface pressure (MPa) |
| t at := 15.56 | actual given atmospheric surface temperature (C) |
| ROP := 18.29 | estimated rate of penetration (m/hr) |
| d bh := 200 | borehole (drill bit) diameter (mm) |
| od dc := 171 | outer diameter of drill collar (mm) |
| id dc := 71 | inner diameter of drill collar (mm) |
| od dp := 114 | outer diameter of drill pipe (mm) |
| id dp := 97 | inner diameter of drill pipe (mm) |
