7 1/2'' 190mm Symmetric Overburden Casing Drilling System Casing Drill Bit

Brand Name:MIROC down the hole hammer drill tool
Certification:ISO9001
Model Number:DTH Button Bit
Minimum Order Quantity:1 Pieces DTH Button Drill Bit
Delivery Time:25 days
Place of Origin:China
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Location: Beijing Beijing China
Address: Room9-616, No. 10 Zhenxing Road (MDW Plaza), Changping District, 102200 Beijing, China
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Product Details

7 1/2'' 190mm Symmetric Overburden Casing Drilling System Casing Drill Bit


Product Description


Symmetric is a system comprised of an ingeniously simple concentric method of drilling through overburden with casing. Symmetric can drill straight holes at any angle (including horizontal) and to depths beyond 100 meters. Working together as one efficient drill bit, the components are made up of:


A pilot bit with large internal flushing holes and external flushing grooves.
Symmetrical ring bit (reamer) with internal bayonet coupling
Casing shoe for driving of casing.


The pilot bit is attached to any common DTH hammer shank or top hammer rod thread.The below size of Symmetric systems which are available, and the special design is upon customer’s requirement:
Symmetric 114, Symmetric 127, Symmetric 140, Symmetric 146, Symmetric 168,
Symmetric 178, Symmetric 195, Symmetric 219, Symmetric 243, Symmetric 273.


Specification

Casing outer dia.(mm)Casing thickness(mm)Ring bit dia.(mm)Max.dia. of normal bit(mm)

Suitable hammer

(inches)

Retrievable
11410126843.5No
122Yes
12710142933.5No
135Yes
14010161974No
148Yes
146101651104No
154Yes
168121881275No
180Yes
17812.71961315No
185Yes
19412.72141456No
202Yes
21912.72431706No
228Yes


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China 7 1/2'' 190mm Symmetric Overburden Casing Drilling System Casing Drill Bit supplier

7 1/2'' 190mm Symmetric Overburden Casing Drilling System Casing Drill Bit

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