Concentric Casing System Ring bits

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Concentric Casing System With Ring bit

Applied to drill complex rock formations

Drills at any angle

Good straightness of borehole

Maximum depth of borehole is 150Meters


Teamwhole concentric casing drilling systems


Usually the land surface of the earth is covered with loose, unconsolidated material such as soil, clay, 

silt, sand, gravel and boulders, which varies in depth from a few centimeters to hundreds of meters.

Use concentric system can drill this complex formation very well.

The systems are available through the whole product range the smallest being for 114 mm (4 1/2") casing and 

largest size available at the moment is for 1220 mm (48") casing.


Application Range

Applied to over burden formations with complex topographic and geological conditions,such

as gravel,fissured formation,boulder,landfill of construction refuse etc.

Drill at any angle

good  straightness of borehole

Maximum depth of borehole can reach 150 meters

Intergrated ring bit and casing shoe(permanent)

ModelOuter Dia. of Casing Tube
(mm)
Inner Dia. of Casing Tube(mm)Wall thickness of casing
(mm)
Ring Bit Outer Dia
(mm)
Ring Bit Inner Dia
(mm)
Max Outer Dia of Normal Bits
(mm)
Hammer TypeWeight
(kg)
For DTH Drilling
R114/6.5-801141016.51228078

COP32/COP34/DHD3.

5/BR3/MACH303

11.5
R127/10-9312710710136939115
R133/10-96133113101419694

COP44/DHD340/MACH44

/MISSION40SD4/XL4/QL40

15.5
R139/10-1021391191014710210019.5
R152/10-1141521321016011411225
R168/10-13016810148177130128

COP54/DHD350/MACH5

0/MISSION50/SD5/QL50

36.5
R177/10-1391771015718713913743
R193/12.7-152193167.612.7203152150

COP62/COP64/DHD360/MISSION6

0/SD6/XL6/QL60/TD150

49
R219/12.7-175219193.612.723217517361
R244/12.7-198244218.612.7254198196

COP84/DHD380/SD

8/QL80/TS180

78
R254/12.7-205254228.612.726620520390
RP273/12.7-224273247.612.7285224222130
R323/12.7-271323297.612.7338271269188
R406/12.7-350406380.612.7420350348DHD112/QL120/SD12/NUMA120335
R457/12.7-376457431.612.7477376374440
R508/16-44450847616524444442520
R558/16-49155852616575491489

QL200/SD18/NUMA18

0/TH18/TS18/TK18

610
R609/16-55360957716637553551670
R660/16-59066062816678590588780
R711/16-63971167916731639637QL200S/TH32/TK24930
R762/16-690762730167816906881070
R812/16-734812780168347347321285
R863/16-788863831168827887861450
R914/16-835914882169358358331720
R1016/16-9111016984161033911909QL30022

Intergrated ring bit and casing shoe with retrievable available



Solitary ring bit(permanent)

ModelOuter Dia. of Casing Tube
(mm)
Inner Dia. of Casing Tube(mm)Wall thickness of casing
(mm)
Ring Bit Outer Dia
(mm)
Ring Bit Inner Dia
(mm)
Max Outer Dia of Normal Bits
(mm)
Hammer TypeWeight
(kg)
For DTH Drilling
P114/8-731149881297371

COP32/COP34/DHD3.

5/BR3/MACH303

12
P139/10-98139119101599896

COP44/DHD340/MACH44

/MISSION40/SD4/XL4/QL40

17
P152/10-9215213210162929020.5
P168/12.7-123168142.612.7188123121

COP54/DHD350/MACH50

/MISSION50/SD5/QL50

29
P177/12.7-129177151.612.719612912740.5
P193/12.7-145193167.612.7214145143

COP62/COP64/DHD360

/MISSION60/SD6/XL6/QL60/TD150

43.5
P219/12.7-144219193.612.723114414251
P244/12.7-160244218.612.7258160158COP84/DHD380/SD8/QL80/TS18073
P273/12.7-191273247.612.7291191189101.5
P323/12.7-238323297.612.7339238236151
P406/12.7-362406380.612.7428362360DHD112/QL120/SD12/NUMA120266
P457/14.2-406457428.614.2475406404386
P508/16-44550847616518445443452
P558/12.7-475558532.612.7570475473QL200/SD18/NUMA180/TH18/TS18/TK18494
P609/16-55160957716628551549610
P660/16-56566062816680565563691
P711/16-64271167916732642640QL200S/TH32/TK24930
P762/16-667762730167816676351003
P812/16-736812780168387367141150
P914/16-836914882169328368341580
P1016/16-9111016984161033911909QL3002175


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