Two Piece Eccentric Overburden Drilling System

A E C D
System No. Outer Dia. Thickness Reamed Dia. Min. Inner Dia. of Casing Shoe Hammer Type Drill Pipe
K188 178 mm
(7")
13 mm - 19 mm
(0.51")– (0.75")
188 mm
(7.4")
144 mm
(5.7")
DHD350
QL 50, SD-5,
COP52/54
76mm- 89mm
(3") - (3.5")
K240 219 mm
(8.62")
12 mm- 15mm
(0.47")-(0.59")
240 mm
(9.45")
192 mm
(7.5")
DHD360, QL 60,
SD-6,
114 mm
(4.5")
K305 273 mm
(10.75")
16 mm-20mm
(0.63")-(0.78")
305 mm
(12")
238 mm
(9.4")
DHD380,
QL 80, SD-8
114mm - 127mm (4.5") - (5")
K360 323mm
(12.7")
20 mm - 24 mm
(0.78") - (0.94")
360 mm
(14.17")
284 mm
(11.8")
DHD380,
QL 8, SD-8/10
127 mm
(5")
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