DRILLSTAR
HOLE OPENER
Fully field maintainable and intrinsically safe design
Drillstar hole openers have been used worldwide by major drilling contractors for over 30 years. Their
proven robustness ensures safe operations while minimizing maintenance and rig costs. Bodies are
designed to last a lifetime, and used cutters are easily replaced.
Safe Design
Drillstar Hole openers have been designed by putting
safety and reliability first. Oversized arms can withstand
heavy WOB, and are mechanically assembled on the
body so that welds are not subjected to any direct
load during drilling.
Easy maintenance
All sizes are field maintainable, with easy replacement
of cutters using only basic tools.
Cutters range
Cutters are made of heat-treated steel, hardfaced with
tungsten carbide. Cutter sizes have been widely standardized
to minimize customer inventory: for example, 23”-24”-26”
and 36” hole openers use the same cutters.
They come in 4 types, adapted to a wide range of formation
hardness:
TYPE S
for soft formations: milled tooth cutter with
wide openings for improved cleaning
TYPE M
for medium formations: our standard, widely
used milled tooth cutter.
TYPE H
for hard formations: milled tooth cutter with
increased teeth density.
26” hole opener
TYPE SH
for very hard formations: tungsten carbide
inserts. Inserts shape can be customized as per
the customer need: chisel, ballistic, round top,
etc
HOLE OPENER
Standard dimensions
Upper
P/N Hole Size Pilot Hole Nr. Cutters Lower Connection
Connection
API Reg. API Reg.
OD OD
Thread Thread
4505000850 8 1/2” 5 3/4” 2-3 6 1/2” 4 1/2” 5” 3 1/2”
4505000950 9 1/2” 6 3/4” 2-3 8” 6 5/8” 4 3/4” 3 1/2”
4505001225 12 1/4” 8 1/2” 2-3 8” 6 5/8” 5 3/4” 4 1/2”
4505001475 14 3/4” 9 5/8” 3 8” 6 5/8” 8” 6 5/8”
4505001750 17 1/2” 12 1/4” 3 9 1/2” 7 5/8” 8 1/2” 6 5/8”
4505002300 23” 17 1/2” 3 9 1/2 - 10” 7 5/8” 9 1/2” 7 5/8”
4505002600 26” 17 1/2” 3 9 1/2 - 10” 7 5/8” 9 1/2” 7 5/8”
4505003600 36” 26” 3-4 10 - 11” 8 5/8” 10” 7 5/8”
4505004200 42” 26” 4 11” 8 5/8” 10 1/2” 7 5/8”
8” arm for X575
DRILLSTAR © Drillstar Industries - 17/10/2017
