Categories

Hot Products

Concentric Casing Drilling

Overburden Drilling System

Product details Rock drilling tools factory KINGDRILLING professionally produce Concentric drilling systems by down the hole hammer which are designed to drill and case a hole simultaneously through unstable ground conditions. In the process of this MRE slide bit casing drilling, it could carry...
Send InquiryChat Now

Product details

Rock drilling tools factory KINGDRILLING professionally produce Concentric drilling systems by down the hole hammer which are designed to drill and case a hole simultaneously through unstable ground conditions. In the process of this MRE slide bit casing drilling, it could carry the casing tube down to the hole and protect wall to achieve drilling work. 


Working principle:

At clockwise condition, reamer bit expanded to bring the casing tube into hole. After finished, reamer bit closed anticlockwise and then can be lift up by the drilling machines. This casing drilling bit is especially suitable for diameter 114-273mm.


Application Range:

It is suitable for drilling water wells, geothermal wells, short micro piles ,medium mini-type grouting hole of building , dam and harbor project .

Model

Hole dia (mm)

Weight (KG)

Closed dia.(mm)

Pilot dia.(mm)

Length (mm)

Case dia(OD*ID)

Spline

MK-MRE90

125

16

90

100

360

114*102

MACH33,DHD3.5

MK-MRE115

155

30

115

125

510

139*127

DHD340,SD4.QL4

MK-MRE140

188

52

140

151

570

168*153

DHD350,SD5,QL5

MK-MRE165

215

95

166

178

690

194*181

DHD360,SD6,QL6

MK-MRE190

238

108

190

203

690

219*206

DHD360,SD6,QL6

MK-MRE215

276

140

215

236

720

254*240

DHD380,SD8,QL8

MK-MRE235

293

160

236

251

730

273*254

DHD380,SD8,QL8

MK-MRE240

293

168

241

256

730

273*260

DHD380,SD8,QL8

How to order:

Casing Tube OD & ID + Reamer Bit Diameter + Minimal Casing Shoe ID + Hammer Shank Style

FAQ:

1. How to order the products?

A: Please send the inquiry with detail item description or with Model number.

 

2. Can I expect a quality products?

A: Yes. mature production technology ensuring the quality satisfy international request.

 

3. Fast delivery time:

A: Usually it takes 25 days for production.only 3 or 5 days if we have stock of your request size.

 

4. Shipping way:

A: Sample order: we suggest Courier express delivery such as DHL/UPS/TNT/FEDEX or by air

Bulk order: by air or by sea we suggest.

 

5.What is the materials?

Steel is TIMKEN, Alloy is from T6 from Element Six.


6. How to choose the suitable head face of the DTH drill bit?

a.  Concave:

Suitable for all kinds of formation, especially for deep well drilling, perpendicularity of the hole is wonderful.

b.  Convex: 

Suitable for the formation of moderate hardness stratum, drilling efficiency is good, borehole perpendicularity is moderate.

c.  Flat:        

Suitable for special hard formation stratum, especially for fracture, crack spacing and complex formation drilling effect is very good, has the good perpendicularity of the borehole.

Hot Tags: overburden drilling system, China, manufacturers, price, in mining, made in China
  • QR CODE
  • facebook