Page 365 - Drilling Technology in Nontechnical Language

356 Drilling Technology in Nontechnical Language Second Edition

pore fluid sampling and pressure overview and summary, 173, 195

testing, 238–239 wellbore deviation, 178–188
program, 46, 51 directional drilling navigation
rotary sidewall coring, 238 geosteering, 193–194
coring systems multilateral wells, 193
orientated coring, 236 multiple wells from single location,
pressure coring, 236 192
sleeve coring, 236 wellbore position surveying tools,
sponge coring, 236 188–189
cost codes, 295, 296 wellbore surveying calculations,
crane drivers, 288 190–192
crossover sub, 61 directional drilling problems
crown block, 132, 133 hole cleaning, 194
logging, 195
D stuck pipe, 194
wellbore stability, 195
directional drilling rationale
daily operations meetings, 332 multiple exploration wells from
decision making single wellbore, 174
in office, 293–294 onshore drilling to offshore

at wellsite, 292–293 reservoir, 174
defoamers, 214 optimum orientation in reservoir,
depth-dependent costs, 297 175
derivative curve, 252–253 overview, 173
derrick, 132, 133 relief wells, 175
derrickman, 287, 351 remedial work (sidetracks), 175
desanders, 131 salt dome drilling, 174
desilters, 131 single surface location for multiple
development well, 85. See also offshore wells, 173–174
development well directional permeability, 27

deviated well, 101 directional profile, 38, 41, 42
calculating depths in, 102 directional wells, 86, 87, 91
diagenesis, 2 terminology, 92
diamond bits directional well planning, 175–178
natural, 141, 143, 144, 145 directional well plan, 176, 177

polycrystalline diamond compact, directional well profile, 176, 177
141, 143–144, 145 J-shaped profile, 176

dicalcium silicate (C S), 208 discharge and spills minimization
2
die collar, 321, 322–323 inadvertent spills, 344
diesel oil bentonite (DOB) plug, 310– offshore rigs, 343
311 onshore rigs, 343–344
differentially sticking, 317–319 overview, 342
differentially stuck pipe dispersants, 214
curing and preventing, 318–319 dispersed muds, 156, 157, 158–159
overview and conditions, 317–318 displacement, 99
directional drilling diverter
directional well planning, 175–178 attaching (land well), 55–57

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