American Oil and Gas Reporter - April 2018 - 139

SPECIAL REPORT: DRILLING TECHNOLOGY
array, we put more of the inserts into
contact with new rock, limiting damage
and increasing cutting efficiency."
Field tests confirm that this spiral configuration reduces damage and improves
ROP, Long says. He indicates the ROP
increase generally exceeds 20 percent,
but can exceed 50 percent in the right
applications.
"We developed the Xplorer Helix configuration using our integrated dynamic
design and analysis platform," Long notes.
"It took careful planning and modeling to
optimize the drilling dynamics and ensure
that staggering the inserts would not interfere
with the patterns on the bits' other cones."
Long says the Xplorer Helix configuration is available globally, and has been
applied in multiple environments around
the world.
For example, the Kuwait Oil Company
selected an Xplorer drill bit with the
Xplorer Helix configuration to increase
ROP while drilling 4,500 feet intervals
through interbedded soft and hard formations. The operator needed to drill a
28-inch vertical section from 500 to 5,000

Arranging tungsten carbide inserts in a spiral array improves
roller cone bits' cutting efficiency
by putting more inserts into contact with new rock. Smith Bits, a
Schlumberger company, says
this innovation increases drilling
speed in many applications by
20-50 percent.

feet through limestone, dolomite, anhydrite
and shale layers, Long details.
Because this section had unconfined
compressive strengths ranging from 6,000
to 24,000 psi, Long says previous bits'
cutting structures would break and chip,

which reduced penetration rates. "With
the spiral configuration, the cutting structure, seal and bearing lasted long enough
to drill the section in one run. This saved
four drilling days and increased ROP by
107 percent," he reports.
r

Positioners Enable Rapid Build Rates
To optimize drilling, operators must
look at how the bit, motor, measurementwhile-drilling tools and other BHA components interact, suggests Ed Spatz, who
was one of the pioneers behind the first
steerable motors. With that goal in mind,
he assembled a multidisciplinary team-
including Mike Reese, who has 40 years
of experience in drill bits, and Jim Dudley,
an MWD and downhole tool expert-to
form an entity now called XR Lateral.
"One of the biggest issues we see is
that drillers need motors with large 2¼degree or 23⁄8-degree bent housings to
achieve the necessary build rates in the
curve," Spatz says. "These extreme bends
stress the motor and other drill string
components, capping the string rotation
speed, and therefore, the ROP the driller
can achieve without risking tool failure.
"At the same time, the high bend
angles cause the motor to rotate in an eccentric pattern that creates an oversized
and tortuous wellbore," Spatz continues.
"The extra hole drilled generates more
cuttings that need to be evacuated while
reducing the annular velocities that assist

with hole cleaning."
Spatz adds that eccentric rotation periodically slams the drill pipe into the side
of the wellbore, causing vibration and potentially damaging BHA components.
"We can reduce bend angle by 40-50
percent," Spatz says. "These 1 to 11⁄4
degree bend angles allow faster and more
concentric rotation, which improves penetration rates and hole quality. In addition,
our technology lets drillers achieve higher
build angles than are possible with standard
steerable motors."
To reduce bend angles, Spatz and his
team use a proprietary model to determine
how well the BHA's components work
together and decide where the BHA needs
to be positioned within the hole to optimize
its performance. Then they add Compound
Geometric Positioners (CGPs) to the motor's housing to keep the BHA in the optimum position.
"No longer is the motor's housing restricted to using no stabilization or a fullwrap stabilizer that is under hole gauge
and often completely ineffective, or a kick
pad for directional work," Spatz declares.

The compound geometry and precise
placement of the positioners lets them
come into play when the BHA is sliding
in the curve or rotating in the lateral,
Spatz says, emphasizing that this optimizes
contact and correctly positions the drill
string in both drilling modes. He adds
that the patent-pending technology enhances the directional driller's job, improving consistency from run to run.
In its first field test, which occurred
in the Permian Basin, Spatz says the positioners exceeded expectations. "The
build rate was within 10 percent of what
our model predicted, and it was 10 percent
higher," he details. "In addition, the tool
face control was excellent. During the
first 100 feet of curve, when tool face is
most erratic, tool face held within one or
two degrees of where the directional
driller wanted it."
Spatz says the CGPs are adaptable to
modern steerable motor technology and
will be beneficial in any directional application, including select parts of the rotary
steerable market, where they can achieve
comparable build rates at a lower cost. r
APRIL 2018 139



American Oil and Gas Reporter - April 2018

Table of Contents for the Digital Edition of American Oil and Gas Reporter - April 2018

Contents
American Oil and Gas Reporter - April 2018 - 1
American Oil and Gas Reporter - April 2018 - 1
American Oil and Gas Reporter - April 2018 - 2
American Oil and Gas Reporter - April 2018 - Contents
American Oil and Gas Reporter - April 2018 - 4
American Oil and Gas Reporter - April 2018 - 5
American Oil and Gas Reporter - April 2018 - 6
American Oil and Gas Reporter - April 2018 - 7
American Oil and Gas Reporter - April 2018 - 8
American Oil and Gas Reporter - April 2018 - 9
American Oil and Gas Reporter - April 2018 - 10
American Oil and Gas Reporter - April 2018 - 11
American Oil and Gas Reporter - April 2018 - 12
American Oil and Gas Reporter - April 2018 - 13
American Oil and Gas Reporter - April 2018 - 14
American Oil and Gas Reporter - April 2018 - 15
American Oil and Gas Reporter - April 2018 - 16
American Oil and Gas Reporter - April 2018 - 17
American Oil and Gas Reporter - April 2018 - 18
American Oil and Gas Reporter - April 2018 - 19
American Oil and Gas Reporter - April 2018 - 20
American Oil and Gas Reporter - April 2018 - 21
American Oil and Gas Reporter - April 2018 - 22
American Oil and Gas Reporter - April 2018 - 23
American Oil and Gas Reporter - April 2018 - 24
American Oil and Gas Reporter - April 2018 - 25
American Oil and Gas Reporter - April 2018 - 26
American Oil and Gas Reporter - April 2018 - 27
American Oil and Gas Reporter - April 2018 - 28
American Oil and Gas Reporter - April 2018 - 29
American Oil and Gas Reporter - April 2018 - 30
American Oil and Gas Reporter - April 2018 - 31
American Oil and Gas Reporter - April 2018 - 32
American Oil and Gas Reporter - April 2018 - 33
American Oil and Gas Reporter - April 2018 - 34
American Oil and Gas Reporter - April 2018 - 35
American Oil and Gas Reporter - April 2018 - 36
American Oil and Gas Reporter - April 2018 - 37
American Oil and Gas Reporter - April 2018 - 38
American Oil and Gas Reporter - April 2018 - 39
American Oil and Gas Reporter - April 2018 - 40
American Oil and Gas Reporter - April 2018 - 41
American Oil and Gas Reporter - April 2018 - 42
American Oil and Gas Reporter - April 2018 - 43
American Oil and Gas Reporter - April 2018 - 44
American Oil and Gas Reporter - April 2018 - 45
American Oil and Gas Reporter - April 2018 - 46
American Oil and Gas Reporter - April 2018 - 47
American Oil and Gas Reporter - April 2018 - 48
American Oil and Gas Reporter - April 2018 - 49
American Oil and Gas Reporter - April 2018 - 50
American Oil and Gas Reporter - April 2018 - 50A
American Oil and Gas Reporter - April 2018 - 50B
American Oil and Gas Reporter - April 2018 - 50C
American Oil and Gas Reporter - April 2018 - 50D
American Oil and Gas Reporter - April 2018 - 51
American Oil and Gas Reporter - April 2018 - 52
American Oil and Gas Reporter - April 2018 - 53
American Oil and Gas Reporter - April 2018 - 54
American Oil and Gas Reporter - April 2018 - 55
American Oil and Gas Reporter - April 2018 - 56
American Oil and Gas Reporter - April 2018 - 57
American Oil and Gas Reporter - April 2018 - 58
American Oil and Gas Reporter - April 2018 - 59
American Oil and Gas Reporter - April 2018 - 60
American Oil and Gas Reporter - April 2018 - 61
American Oil and Gas Reporter - April 2018 - 62
American Oil and Gas Reporter - April 2018 - 63
American Oil and Gas Reporter - April 2018 - 64
American Oil and Gas Reporter - April 2018 - 65
American Oil and Gas Reporter - April 2018 - 66
American Oil and Gas Reporter - April 2018 - 67
American Oil and Gas Reporter - April 2018 - 68
American Oil and Gas Reporter - April 2018 - 69
American Oil and Gas Reporter - April 2018 - 70
American Oil and Gas Reporter - April 2018 - 71
American Oil and Gas Reporter - April 2018 - 72
American Oil and Gas Reporter - April 2018 - 73
American Oil and Gas Reporter - April 2018 - 74
American Oil and Gas Reporter - April 2018 - 75
American Oil and Gas Reporter - April 2018 - 76
American Oil and Gas Reporter - April 2018 - 77
American Oil and Gas Reporter - April 2018 - 78
American Oil and Gas Reporter - April 2018 - 79
American Oil and Gas Reporter - April 2018 - 80
American Oil and Gas Reporter - April 2018 - 81
American Oil and Gas Reporter - April 2018 - 82
American Oil and Gas Reporter - April 2018 - 83
American Oil and Gas Reporter - April 2018 - 84
American Oil and Gas Reporter - April 2018 - 85
American Oil and Gas Reporter - April 2018 - 86
American Oil and Gas Reporter - April 2018 - 87
American Oil and Gas Reporter - April 2018 - 88
American Oil and Gas Reporter - April 2018 - 89
American Oil and Gas Reporter - April 2018 - 90
American Oil and Gas Reporter - April 2018 - 91
American Oil and Gas Reporter - April 2018 - 92
American Oil and Gas Reporter - April 2018 - 93
American Oil and Gas Reporter - April 2018 - 94
American Oil and Gas Reporter - April 2018 - 95
American Oil and Gas Reporter - April 2018 - 96
American Oil and Gas Reporter - April 2018 - 97
American Oil and Gas Reporter - April 2018 - 98
American Oil and Gas Reporter - April 2018 - 99
American Oil and Gas Reporter - April 2018 - 100
American Oil and Gas Reporter - April 2018 - 101
American Oil and Gas Reporter - April 2018 - 102
American Oil and Gas Reporter - April 2018 - 103
American Oil and Gas Reporter - April 2018 - 104
American Oil and Gas Reporter - April 2018 - 105
American Oil and Gas Reporter - April 2018 - 106
American Oil and Gas Reporter - April 2018 - 107
American Oil and Gas Reporter - April 2018 - 108
American Oil and Gas Reporter - April 2018 - 109
American Oil and Gas Reporter - April 2018 - 110
American Oil and Gas Reporter - April 2018 - 111
American Oil and Gas Reporter - April 2018 - 112
American Oil and Gas Reporter - April 2018 - 113
American Oil and Gas Reporter - April 2018 - 114
American Oil and Gas Reporter - April 2018 - 115
American Oil and Gas Reporter - April 2018 - 116
American Oil and Gas Reporter - April 2018 - 117
American Oil and Gas Reporter - April 2018 - 118
American Oil and Gas Reporter - April 2018 - 119
American Oil and Gas Reporter - April 2018 - 120
American Oil and Gas Reporter - April 2018 - 121
American Oil and Gas Reporter - April 2018 - 122
American Oil and Gas Reporter - April 2018 - 123
American Oil and Gas Reporter - April 2018 - 124
American Oil and Gas Reporter - April 2018 - 125
American Oil and Gas Reporter - April 2018 - 126
American Oil and Gas Reporter - April 2018 - 127
American Oil and Gas Reporter - April 2018 - 128
American Oil and Gas Reporter - April 2018 - 129
American Oil and Gas Reporter - April 2018 - 130
American Oil and Gas Reporter - April 2018 - 131
American Oil and Gas Reporter - April 2018 - 132
American Oil and Gas Reporter - April 2018 - 133
American Oil and Gas Reporter - April 2018 - 134
American Oil and Gas Reporter - April 2018 - 135
American Oil and Gas Reporter - April 2018 - 136
American Oil and Gas Reporter - April 2018 - 137
American Oil and Gas Reporter - April 2018 - 138
American Oil and Gas Reporter - April 2018 - 139
American Oil and Gas Reporter - April 2018 - 140
American Oil and Gas Reporter - April 2018 - 141
American Oil and Gas Reporter - April 2018 - 142
American Oil and Gas Reporter - April 2018 - 143
American Oil and Gas Reporter - April 2018 - 144
American Oil and Gas Reporter - April 2018 - 145
American Oil and Gas Reporter - April 2018 - 146
American Oil and Gas Reporter - April 2018 - 147
American Oil and Gas Reporter - April 2018 - 148
American Oil and Gas Reporter - April 2018 - 149
American Oil and Gas Reporter - April 2018 - 150
American Oil and Gas Reporter - April 2018 - 151
American Oil and Gas Reporter - April 2018 - 152
American Oil and Gas Reporter - April 2018 - 153
American Oil and Gas Reporter - April 2018 - 154
American Oil and Gas Reporter - April 2018 - 155
American Oil and Gas Reporter - April 2018 - 156
American Oil and Gas Reporter - April 2018 - 157
American Oil and Gas Reporter - April 2018 - 158
American Oil and Gas Reporter - April 2018 - 159
American Oil and Gas Reporter - April 2018 - 160
American Oil and Gas Reporter - April 2018 - 161
American Oil and Gas Reporter - April 2018 - 162
American Oil and Gas Reporter - April 2018 - 163
American Oil and Gas Reporter - April 2018 - 164
American Oil and Gas Reporter - April 2018 - 165
American Oil and Gas Reporter - April 2018 - 166
American Oil and Gas Reporter - April 2018 - 167
American Oil and Gas Reporter - April 2018 - 168
American Oil and Gas Reporter - April 2018 - 169
American Oil and Gas Reporter - April 2018 - 170
American Oil and Gas Reporter - April 2018 - 171
American Oil and Gas Reporter - April 2018 - 172
American Oil and Gas Reporter - April 2018 - 173
American Oil and Gas Reporter - April 2018 - 174
American Oil and Gas Reporter - April 2018 - 175
American Oil and Gas Reporter - April 2018 - 176
American Oil and Gas Reporter - April 2018 - 177
American Oil and Gas Reporter - April 2018 - 178
American Oil and Gas Reporter - April 2018 - 179
American Oil and Gas Reporter - April 2018 - 180
http://www.nxtbook.com/nxtbooks/aogr/201911
http://www.nxtbook.com/nxtbooks/aogr/201910
http://www.nxtbook.com/nxtbooks/aogr/201909
http://www.nxtbook.com/nxtbooks/aogr/201908
http://www.nxtbook.com/nxtbooks/aogr/201907
http://www.nxtbook.com/nxtbooks/aogr/201906
http://www.nxtbook.com/nxtbooks/aogr/201905
http://www.nxtbook.com/nxtbooks/aogr/201904
http://www.nxtbook.com/nxtbooks/aogr/201903
http://www.nxtbook.com/nxtbooks/aogr/201902
http://www.nxtbook.com/nxtbooks/aogr/201901
http://www.nxtbook.com/nxtbooks/aogr/201812
http://www.nxtbook.com/nxtbooks/aogr/201811
http://www.nxtbook.com/nxtbooks/aogr/201810
http://www.nxtbook.com/nxtbooks/aogr/pbios_201810
http://www.nxtbook.com/nxtbooks/aogr/201809
http://www.nxtbook.com/nxtbooks/aogr/201808
http://www.nxtbook.com/nxtbooks/aogr/201807
http://www.nxtbook.com/nxtbooks/aogr/201806
http://www.nxtbook.com/nxtbooks/aogr/201805
http://www.nxtbook.com/nxtbooks/aogr/201804
http://www.nxtbook.com/nxtbooks/aogr/201803
http://www.nxtbook.com/nxtbooks/aogr/201802
http://www.nxtbook.com/nxtbooks/aogr/201801
http://www.nxtbook.com/nxtbooks/aogr/201712
http://www.nxtbook.com/nxtbooks/aogr/201711
http://www.nxtbook.com/nxtbooks/aogr/201710
http://www.nxtbook.com/nxtbooks/aogr/201709
http://www.nxtbook.com/nxtbooks/aogr/201708
http://www.nxtbook.com/nxtbooks/aogr/201707
http://www.nxtbook.com/nxtbooks/aogr/201706
http://www.nxtbook.com/nxtbooks/aogr/201705
http://www.nxtbook.com/nxtbooks/aogr/201704
http://www.nxtbook.com/nxtbooks/aogr/201703
http://www.nxtbook.com/nxtbooks/aogr/201702
http://www.nxtbook.com/nxtbooks/aogr/201701
http://www.nxtbook.com/nxtbooks/aogr/201612
http://www.nxtbook.com/nxtbooks/aogr/201611
http://www.nxtbook.com/nxtbooks/aogr/201610
http://www.nxtbook.com/nxtbooks/aogr/pbios2016_programguide
http://www.nxtbook.com/nxtbooks/aogr/201609
http://www.nxtbook.com/nxtbooks/aogr/201608
http://www.nxtbook.com/nxtbooks/aogr/201607
http://www.nxtbook.com/nxtbooks/aogr/201606
http://www.nxtbook.com/nxtbooks/aogr/201605
http://www.nxtbook.com/nxtbooks/aogr/201604
http://www.nxtbook.com/nxtbooks/aogr/201603
http://www.nxtbook.com/nxtbooks/aogr/201602
http://www.nxtbook.com/nxtbooks/aogr/201601
http://www.nxtbook.com/nxtbooks/aogr/201512
http://www.nxtbook.com/nxtbooks/aogr/201511
http://www.nxtbook.com/nxtbooks/aogr/201510
http://www.nxtbook.com/nxtbooks/aogr/201509
http://www.nxtbook.com/nxtbooks/aogr/201508
http://www.nxtbook.com/nxtbooks/aogr/201507
http://www.nxtbook.com/nxtbooks/aogr/201506
http://www.nxtbook.com/nxtbooks/aogr/201505
http://www.nxtbook.com/nxtbooks/aogr/201504
http://www.nxtbook.com/nxtbooks/aogr/201503
http://www.nxtbook.com/nxtbooks/aogr/201502
http://www.nxtbook.com/nxtbooks/aogr/201501
http://www.nxtbook.com/nxtbooks/aogr/201412
http://www.nxtbook.com/nxtbooks/aogr/201411
http://www.nxtbook.com/nxtbooks/aogr/201410
http://www.nxtbook.com/nxtbooks/aogr/201409
http://www.nxtbook.com/nxtbooks/aogr/pbios2014_programguide
http://www.nxtbook.com/nxtbooks/aogr/201408
http://www.nxtbook.com/nxtbooks/aogr/201407
http://www.nxtbook.com/nxtbooks/aogr/201406
http://www.nxtbook.com/nxtbooks/aogr/201405
http://www.nxtbook.com/nxtbooks/aogr/201404
http://www.nxtbook.com/nxtbooks/aogr/201403
http://www.nxtbook.com/nxtbooks/aogr/201402
http://www.nxtbook.com/nxtbooks/aogr/201401
http://www.nxtbook.com/nxtbooks/aogr/201312
http://www.nxtbook.com/nxtbooks/aogr/201311
http://www.nxtbook.com/nxtbooks/aogr/201310
http://www.nxtbook.com/nxtbooks/aogr/201309
http://www.nxtbook.com/nxtbooks/aogr/201308
http://www.nxtbook.com/nxtbooks/aogr/201307
http://www.nxtbook.com/nxtbooks/aogr/201306
http://www.nxtbook.com/nxtbooks/aogr/201305
http://www.nxtbook.com/nxtbooks/aogr/201304
http://www.nxtbook.com/nxtbooks/aogr/201303
http://www.nxtbook.com/nxtbooks/aogr/201302
http://www.nxtbook.com/nxtbooks/aogr/201301
http://www.nxtbook.com/nxtbooks/aogr/201212
http://www.nxtbook.com/nxtbooks/aogr/201211
http://www.nxtbook.com/nxtbooks/aogr/201210
http://www.nxtbook.com/nxtbooks/aogr/201209
http://www.nxtbook.com/nxtbooks/aogr/2012_pbios
http://www.nxtbook.com/nxtbooks/aogr/201208
http://www.nxtbook.com/nxtbooks/aogr/201207
http://www.nxtbook.com/nxtbooks/aogr/201206
http://www.nxtbook.com/nxtbooks/aogr/201205
http://www.nxtbook.com/nxtbooks/aogr/201204
http://www.nxtbook.com/nxtbooks/aogr/201203
http://www.nxtbook.com/nxtbooks/aogr/201202
http://www.nxtbook.com/nxtbooks/aogr/201201
http://www.nxtbook.com/nxtbooks/demo/aogr_clone
http://www.nxtbook.com/nxtbooks/aogr/201112
http://www.nxtbookMEDIA.com