Forging Concentric DTH Drill Bit for Big Diameter Construction Anchor Drilling

Concentric drilling tools With casing shoe for big diameter construction anchor drilling

Introduction

1.Sound drilling straightness and fast drilling speed.

Theoretically, symmetric drilling makes sure the hole in all formations such as gravel bed, stright,the drilling speed fast and the drilling torque relatively small.    

2.The torque necessary for symmetric drilling is much less than that for eccentric drilling.     

A smooth and steady drilling may be achieved using ring bit on all conditions and create big holes even if a small drilling rig is used.   

3.Unlocking-relocking can be relatively easily achieved.  

Unlocking the system is sometimes required during the drilling process. Relocking is easy since there are no eccentric components that must be opened or closed inside the hole.

4.Drilling can be carried out at any angle.  

Symmetric drilling can shape the hole at any angle.   

5.Effective cutting discharge.  

The airflow for cuttings discharge purpose during the symmetric drilling will instantly ascend along the casing pipe after spurting out from the pilot bit.Hence, the negligible damage on the wall of hole can guarantee effective cutting discharge.

6.Easy to operate and system security.

Drilling workers are relieved of the need to maintain their continuous and constant attention on drilling process since symmetric drilling can carry on smoothly.

7.Economical and cost effective.  

The structure and principle of operation of symmetric drilling system can guarantee considerable reduction in downtime, fewer consumables and lower operating costs.

Concentric drilling precess

Specification

A	B	C	D	E	F	G
Outer Dia.of Casing Tube	Inner Dia of casing tube	Reamed Dia.	Min.Inner Dia.of Casing Shoe	Hammer Type	Drill Pipe	Max.Outer Dia.of Normal Bit
mm	mm	mm	mm		mm	mm
108	93-99	118	86	3''	76	77
114	101-103	127	91	3''	76	Mr. Mr. Jack Cheng Tel: 86-10-84673566 Contact to this supplier Related Search Dth Bit    Big Diameter    Dth Drilling Tools    Drilling Bit    Dth Drill Rig    Drill Bit    More>> Find more related products in following catalogs on Hisupplier.com Machinery & Industrial Supplies >> Welding & Solders × Company Info Xuanhua Jinke Drilling Machinery Co., Ltd. [China (Mainland)] Business Type:Manufacturer City: Beijing Province/State: Beijing Country/Region: China (Mainland) View Contact Details You May Like: prev Gear Pump Type Reciprocating Piston Mud ... High Pressure Triplex Single Acting Dril... CAT S4E S4F S4K S6K 3306 3066 3406 Diese... Deutz Diesel Engine Parts for Constructi... Portable Screw Sullair Air Compressor Sp... Cummins Engine Drived Hydraulic DTH Rock... Dry Hydraulic Dust Collector Blast Hole ... Electric Motor Portable Pneumatic DTH Dr... Portable Pneumatic DTH Drilling Rig for ... 200M Deep Hole High Torque Hydraulic DTH... 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