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Eccentric Casing Drilling

Head Casing Drilling System

Head Eccentric Casing drilling System Product feature: Down the hole (DTH) tools manufacturer KINGDRILLING Head Eccentric Casing drilling system is made up of a pair of chain embedded to guide apparatus, and ensure the bit is not contacting and damaging the retaining ring when it is rotating....
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Head Eccentric Casing drilling System

Product feature:

Down the hole (DTH) tools manufacturer KINGDRILLING Head Eccentric Casing drilling system is made up of a pair of chain embedded to guide apparatus, and ensure the bit is not contacting and damaging the retaining ring when it is rotating. When rotated clockwise, eccentric part will be expanded to bring the casing tube into hole. After completing, eccentric bit will be closed while rotated anticlockwise, and it can be lifted up by the drilling machine. This type is especially suitable for 114-273mm in diameter.

eccentric casing drilling.jpg

ODEX Casing drilling.jpg


Application Range

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

Model

Hole dia(mm)

Weight (KG)

Closed dia.(mm)

Pilot dia.(mm)

Length(mm)

Case dia.(OD*ID)

Spline

MK-MEC90

125

16

90

100

360

114*102

MACH33,DHD3.5

MK-MEC115

155

30

115

125

510

139*127

DHD340,SD4.QL4

MK-MEC140

188

52

140

151

570

168*153

DHD350,SD5,QL5

MK-MEC165

215

95

166

178

690

194*181

DHD360,SD6,QL6

MK-MEC190

238

108

190

203

690

219*206

DHD360,SD6,QL6

MK-MEC215

276

140

215

236

720

254*240

DHD380,SD8,QL8

MK-MEC235

293

160

236

251

730

273*254

DHD380,SD8,QL8

MK-MEC240

293

168

241

256

730

273*260

DHD380,SD8,QL8


Order guide: 

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

 

FAQ:

1. How to control quality?

A: We have our own experienced QC team,there will be strict inspection and testing for each order before shipping out. 


2. Fast delivery time:

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


3. Competitive price:

A:KINGDRILLING factory can supply you the lowest price due to direct sale to customers without distributor!


4. Methods of Payment:

T/T (Telegraphic Transfer) or Western Union.


5. What is the materials?

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


6. How to choose the suitable Pneumatic DTH hammer?

a. Hole Size:

It is better for you to choose the one which the outside diameter is nearest to the hole diameter. This will reduce the hole collapse, and the hole cleaning is easier.

b. Air Consumption:

You must consider about the consumption of compressed air when you use the Pneumatic DTH hammer. Generally speaking, with the raising of the size of hammer, peak performance requires higher compressed gas consumption and lower pressure. In order to make sure each hammer will be used in the proper consumption of compressed air and pressure, please refer to the attachment.

c. Drill rig Capacity:   

The larger bit and hammer will need the drilling rig to provide greater torque and promoting force, but do not exceed the maximum load of the drill. As for the other questions about drill ability, please consult your sales representative


7. 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.



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