Page 16 - Drilling a Straight Hole

INDEX

Petroleum Extension-The University of Texas at Austin
hole deviation and, 26, 26f, 27, 27f Gyroscope No. 1, 4, 4f
pendulum assembly and, 39 gyro-while drilling equipment, 99
risk of sticking, 91
Surwell well-surveying instrument and, 4 hammer bits, 29, 29f, 31, 31f
hardbanding, 65, 66f
elastomer, 57f hardfacing, 80, 81f
electromagnetic (EM) radiation, 99 hard formations
elevators, 65, 65f bit wear and, 52
evaluation problems, 22 hardbanding and, 66f
exploration wells, casing and, 20 offset ledges and, 25, 25f
wall contact area and, 79
fatigue curve, 19, 19f hard-rock basins
fatigue failure, 17–18, 17f air percussion tools and, 29–30, 30f, 35
filter cake, 77, 83 upsurge in drilling in, 7
filtrate, 78 heavy-walled drill pipe (HWDP), 48–49, 70–71, 70f
fishing jobs heavy-weight drill pipe, 70–71
keyseats and, 16 hole(s). See crooked hole(s); straight hole(s)
large drill collars and, 67, 68t AKO assembly for, 58f
fixed-cutter bits (PDC), 29, 29f, 35 drilling upper portion of, 86
fluid migration, 20 full-gauge, 37
formation(s). See also hard formations; rock(s); soft horizontal, 58
formations junked, 18
boundaries of, 4 making, 27
cutters for roller reamers, 84f pilot, 37
depths and, 1 trajectory, planning, 33
interbedded, 24 tripping out of, 83
nonabrasive, 37 hole angle. See restricted total hole angle
offset ledges and, 25, 25f hole-angle change, 11. See also restricted rate of
stabilizers and, 49, 82 hole-angle change
formation dip, 31 hole angle drop rates, 42, 43t
BHAs and, 53f, 54f hole deviation, 23–32. See also controlling hole
bit and, 23 deviation
laminar formations and, 24, 24f angle-drop rates and, 43t
formation effects, 23–25 control methods and, 59
about, 23 downhole deviation and, 1
drillability of formations, variation in, 25, 25f drilling contracts and, 3
formation dip, 24–25, 24f factors affecting, 31–32
formation factors, 31 formation effects, 23–25
formation pressure, 78 mechanical effects, 26–31, 32
free-point indicators, 63 new technology and, 9
fulcrum point, 38f, 40, 56 hole opener, 37
fulcrum stabilizer, 40, 56 horizontal holes, 58
full-gauge hole, 37 horizontal wells, 2
horsepower, 47
ghost reamer, 83 Huntington Beach oilfield, 5, 5f
go-devil HWDP. See heavy-walled drill pipe (HWDP)
baffle plate and, 93f, 94–95, 94f hydrostatic energy, 35
defined, 91, 92
double recorder disc and, 96, 97f IADC Daily Drilling Report, 34f
landing and centering, 94 inclination (angle), 4
methods for running, 93, 93f inclinometer, 4, 98, 98f
Grade-E drill pipe, dogleg limits and, 18, 19f ink-bottle survey instrument, 4, 4f
granite, 25f inside diameter (ID)
“gunbarrel,” 56 drill collar weight and, 61, 63
gun barrel approach, 44 maximum allowable, 48
gyroscope(s), 4, 96 moments of inertia and, 47t

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