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[China]
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Address: 1-2-905 California Sunshine, Optical Valley Street,Wuhan 430074, China
Contact name:Wendy Chen
Wuhan Kingdrilling Diamond Co.,Ltd |
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Verified Suppliers
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Product name: 273mm MRING tunneling casing drilling ring bit for 8 inch DTH hammer
Product category: Concentric casing drilling system
Matched hammer: Hammer DHD380
Matched casing pipe OD: 273mm
MRING tunneling casing drilling ring bit are designed to use ring
bit which is not connected to casing shoe.
Special profile DTH Bit passes through enough large inner diameter
of ring bit.
MRING tunneling casing drilling ring bit technical parameters:
| Model | External Dia.(mm) | Casing Dia.(OD*ID) | Spline |
| MK-MRING90 | 125 | 114*102 | MACH33, DHD3.5 |
| MK-MRING115 | 155 | 139*127 | DHD340, SD4, QL4 |
| MK-MRING140 | 188 | 168*153 | DHD350, SD5, QL5 |
| MK-MRING165 | 215 | 194*181 | DHD360, SD6, QL6 |
| MK-MRING190 | 238 | 219*206 | DHD360, SD6, QL6 |
| MK-MRING215 | 276 | 254*240 | DHD380, SD8, QL8 |
| MK-MRING235 | 293 | 273*254 | DHD380, SD8, QL8 |
| MK-MRING240 | 293 | 273*260 | DHD380, SD8, QL8 |
| MK-MRING280 | 345 | 323*303 | SD10 |
| MK-MRING315 | 375 | 355*335 | SD10 |
| MK-MRING365 | 432 | 406*387 | N120, N125, SD12 |
| MK-MRING460 | 530 | 508*483 | N125, N180 |
| MK-MRING510 | 580 | 559*533 | N180 |
| MK-MRING560 | 635 | 610*584 | N180 |
| MK-MRING610 | 695 | 660*632 | N240 |
| MK-MRING660 | 735 | 711*685 | N240 |
| MK-MRING710 | 785 | 762*736 | N240 |
| MK-MRING745 | 838 | 813*780 | N240 |
| MK-MRING810 | 886 | 864*838 | N240, N240S |
| MK-MRING860 | 935 | 914*884 | N240S |
| MK-MRING910 | 980 | 965*935 | N240S |
| MK-MRING960 | 1038 | 1016*986 | N240S, M330 |
| MK-MRING1010 | 1090 | 1067*1041 | M330 |
How to order:
Casing Tube OD & ID + Ring Bit Diameter + Hammer Shank + Maximal Normal Bit Diameter +
Casings and Casing Shoes Installation Method (if by threads, threads standard must be offered)
Other size of MRING system is available upon customer's request
FAQ:
1. What is drill casing?
Casing is a large diameter pipe that is assembled and inserted into a recently drilled section of a borehole. Similar to the bones of a spine protecting the spinal cord, casing is set inside the drilled borehole to protect and support the wellstream.
2. Why is overburden important?
In a petroleum system, the overburden rock overlies the source rock and contributes to its thermal maturation because of higher temperatures at greater depths. The age and thickness of the overburden rock determines the burial rate and thereby influences the heating rat.
3. How far can you directional bore?
What are the minimum and maximum lengths of crossing? Maximum
lengths and hole diameters are determined by project specific
geotechnical conditions however effective outside range for heavy
rig horizontal directional drilling is 3,000 m
More information:
