Page 17 - Drilling a Straight Hole

DRILLING A STRAIGHT HOLE

Petroleum Extension-The University of Texas at Austin
OD and, 63f observation wells, casing and, 20
wall thickness and, 66 offset cones, 29, 29f
integral-blade stabilizers, 81f, 82 offset historical data, 9
integrated drilling system, rig site, 89f offset leases, 1
interbedded formations, 24 offset ledges, 25, 25f
oilfields, Huntington Beach, California, 5, 5f
junk, 92 Oklahoma
junked holes, 18 BHAs and, 53, 54f
junk slots hard-rock basins in, 7
PHA and, 44, 45 rigs in, 1
stabilizer blades and, 80 straight-hole field case, 54f
stabilizers and, 50 outside diameter (OD)
bit size and, 66
keyseat(s) drill collar weight and, 61, 63
defined, 21 fatigue failure and, 67
formation of, 15–16, 15f ID and, 63f
problems, 21–22 maximum allowable, 48
severe, 16 moments of inertia and, 47t
usable borehole and, 12 nominal pipe and, 16
ranges, 65
laminar formations, 24, 24f overload, 17, 18
lease(s) overshot, 4, 68t
offset, 1 overshot tools, 67
total hole angle and, 13, 13f packed-hole assembly (PHA), 44f, 51f, 55f
violation of, 5, 6 BHA and, 44
ledge effect, 25, 25f crooked-hole conditions and, 51f
limestone, 25f, 83 design factors and, 46
logging tools, wireline and, 20 properly designed, 45
Lubinski, Arthur, 18, 40 reaching TD and, 53
lubricants, filter-cake dissolving, 78
stabilization points and, 46, 46f
various conditions and, 50–54
magnetic deviation surveys, 65 vibration dampener and, 86
making hole, 27 packed pendulum assembly, 55–56, 55f. See also
mandrel, 81f, 83 pendulum assembly
marbles, 25f
measurement-while-drilling (MWD). See also packers, 20
MWD tools packing off the hole, 44
BHA and, 99 pay zone, 2f, 14, 21
borehole direction/inclination and, 6 PDC. See polycrystalline diamond compact (PDC) bits
rig site integrated drilling system, 89f PDC bits, 35
milling out tools, 20 pendulum, 55f
moments of inertia, 47, 47t pendulum assembly, 38–43. See also packed
monitors, Petron, 89f pendulum assembly
mud motor rotor, 56, 56f designers of, 40
mud pulse telemetry, 88, 88f hole angle drop rate and, 42, 43t
mud weights pendulum effect and, 26f, 38, 39
adjusting for different, 18 pendulum forces and, 38, 38f, 39
buoyancy factors for, 72t stabilizers and, 40, 42
multiple recorder, 96 WOB limits and, 40, 41t, 42
MWD. See measurement-while-drilling (MWD) pendulum BHA. See pendulum assembly
MWD tools, 35, 86, 88, 89f pendulum effect, 26f
BHA and, 37
Nicholson, Robert W., 18 defined, 38
nonabrasive formation, 37 deviation-recording instruments and, 95
nonmagnetic collars, 65 reamer above bit and, 85, 85f
nonrotating sleeve stabilizer, 81f, 83 pendulum force, 38, 38f

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