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Symmetrix Overburden Casing Drilling System with Ring Bit

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Address: Building 3, Rainbow road,No.188 ; Xishui;Hubei province

Contact name:Lucy

Hubei Superdrill Mechnical Equipment Co.,Ltd

Symmetrix Overburden Casing Drilling System with Ring Bit

Country/Region	china
City & Province	hubei

Product Details

Symmetrix Overburden Casing Drilling System with Ring Bit

A driver bit and a ring are assembled to a complete concentric system bit which is suit for 114-1067mm diameter tube.

Advantage:

1. Enhance penetration and perpendicularity

2. Reduce torque requirements

3. Deal with straight, oblique hole and other angle holes

4. Lowest effect with environment

External dia.(mm): 125/155/188/215/238/276/293/345/375/432...1090

Casing dia.(OD*ID,mm): 114*102/139*127/168*153/194*181...1067*1041

Specifications:

Outer Dia Of Casing Tube (mm)	Inner Dia Of Casing Tube(mm)	Reamed Dia(mm)	Min Inner Dia Of Casing Shoe(mm)	Drill Pipes(mm)	Max.Outer Dia of Normal Bit(mm)
114	101-103	127	91	76	77
127	114-116	136	101	76	82
140	124-127	152	117	76	92
146	127-132	154	117	76	105
168	149-155	184	140	76	105
178	159-165	194	150	76.89	125
193	173-180	206	164	76.89	140
219	199-206	234	184	89.114	150
244	224-231	260	210	89.114	165
273	251-257	305	240	114	190
323	301-310	348	284	114.127	220
406	382-388	440	364	127	255
457	433-439	488	413	140	340
508	484-490	538	464	140	385
558	534-540	590	514	140	440
610	586-592	642	566	140	485
660	636-642	694	615	168	540
711	687-693	745	665	168	590
762	738-744	798	716	168	640
863	839-845	900	815	168	685

Operation Steps:

A:When drilling starts working,reaming sleeve will open,borehole range will increase,which will casing shoe and casing tube.

B:When finish drilling in overburden layer,pay attention to reverse circulation,reaming sleeve circles up,eccentric drilling bit lifts out from the borehole.

C:The casing that can be left in the borehole to prevent borehole from collapsing while pulling out pipe and grouting concrete.

D:Regular drilling bits can be applied to drill the depth as required in the rock stratum.