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Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit

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Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit

China Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit supplier
Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit supplier Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit supplier Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit supplier

Large Image :  Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit

Product Details:

Place of Origin: China
Brand Name: PRODRILL
Certification: ISO:9001
Model Number: Symmetric overburden drilling system O.D.194mm

Payment & Shipping Terms:

Minimum Order Quantity: 1 Pcs
Price: Negotiable
Packaging Details: WOODEN BOX
Delivery Time: 10-15 DAYS
Payment Terms: T/T
Supply Ability: 5000Pcs/Month
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Detailed Product Description
Type: Drill Bit Machine Type: Drilling Tool
Material: Carbide Processing Type: Forging
Use: Coal Mining O.D.: 194mm

Symmetric overburden drilling system O.D.194mm;Symmetric / Concentric Overburden Casing Drilling System

 

Symmetric/Centrex/Symmitrix Drilling System 
Symmetric is a concentric drilling system with retrievable pilot bits. 

Permanent Model 
The ring bit will be left in the hole after drilling finished. 

This system drills in any direction and in any type of ground condition. 

It is, in fact, the most flexible and efficient overburden system on the markettoday. 

The Symmetric components are made up of: 
---A pilot bits with large internal flushing holes and external flushinggrooves 
---Symmetrical ring bit (reamer) with internal bayonet coupling 
---Casing shoe for driving of casing. 
The Pilot bits is attached to any common DTH hammer shank. 


The ProDrill symmetric drilling system is designed to drill and case a hole simultaneously through unstabled ground conditions. The driver bit incorporated with a satisficial ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, and thus minimising the disruption of the surronding of the drill hole.

 

percussive energy of hammer is transferred through the pilot and ring  bits for crushing rock.Part of impact energy can push casing tube forward.

 

Assembly and drilling process:
A. Remove the front joint of the impactor, install the main drill on the front joint of the impactor, and screw it into the impactor.
B. Insert the alloy ring from the head of the main drill bit and rotate it to the right to make the card position of the two bits. The impactor with the drill bit is erected.
C. Insert the tube boot from the tail of the impactor and screw it on the thread of the alloy ring (left-handed).
D. Insert the heel from the tail of the impactor into the inside of the tube and weld the tube and the tube.
E. Link the assembled heel system to the rig through the drill pipe.
F. Start the drilling rig and start drilling (right-hand drilling). When the drilling depth is close to the length of the pipe, stop and remove the exposed drill pipe (the drill pipe inside the pipe cannot be unloaded), plus a new heel pipe; the new heel pipe and the upper heel pipe (The heel that has entered the rock formation) is linked by electric welding, and the drill pipe is connected again to continue drilling. This is repeated until the drilling depth reaches the specified requirements.
G. After the drilling is completed, make the drill pipe left-handed 5-10° (or left-handed 10-15mm) and lift the drill pipe upward to disengage the alloy ring from the main drill bit (the drill pipe must stop left-handed after the main drill bit and the alloy ring are disengaged). Otherwise, the drill pipe will fall into the hole several times, and the drill pipe will be lifted again. When the whole drill pipe is exposed, use a wrench to clamp the drill pipe in the pipe (to prevent the drill pipe from falling in the pipe) and remove it. Exposed to the outer drill pipe. The rig is lowered, the link is followed by the drill pipe in the pipe, the wrench is loosened, and the drill pipe is lifted again, so that it is repeated until the main drill bit is pulled out.
H. Note: An alloy ring, a tube shoe and multiple heel tubes are required for each hole drilled; the main drill bit can be reused.

 

Advantages: 
Full face head desigh for faster penetration and straighter hole 
Less torque is required 
Can drilll in vertical, horizotal or any direction 
Minimize disruption to the drilled hole 

High-pressure pressure concentric with-tube drills Reaming and pipe DTH drills Drilling holes with high drilling efficiency, eliminate the collapse of the hole, the hole is not bent and is mainly used for: hard, loose, broken or gravel, etc. The drilling of the formation into the casing has the advantages of good wall protection performance and high drilling efficiency.

 

 

Specification

Atlas Copco SOD Permanent/Top hammer
Symmetrix overburden drilling system
Order number Casing wall
max. thickness
Ring bit Pilot bit Unit
Inner Outer Outer
ATLAS-SOD 76 8 41 88 58 mm
0.31 1.61 3.46 2.26 inch
ATLAS-SOD 89 8 54 100 70 mm
0.31 2.13 3.94 2.76 inch

 

 

RoBit Size Permanent/Top hammer
Symmetrix overburden drilling system
Code No. Casing O.D. Wall thickness Ring bit I.D. Ring bit O.D. Polit bit O.D. Thread
mm inch mm inch mm inch mm inch mm inch
RoBit-SOD 89 89 3 1/2'' 4 0.157 71 2.795 99 3.898 80 3.15 T38
RoBit-SOD 76 76 3'' 8 0.315 47 1.85 90 3.543 59 2.323 T38
RoBit-SOD 89 89 3 1/2'' 8 0.315 50.8 2 94.9 3.736 70 2.756 T38
RoBit-SOD 101 101.6 4'' 10 0.394 65 2.559 110 4.331 79 3.11 T38
RoBit-SOD 114 114 4 1/2'' 10 0.394 73.5 2.894 120.3 4.736 92.5 3.642 T38
RoBit-SOD 140 140 5 1/2'' 10 0.394 94 3.701 145.7 5.736 117.5 4.626 T45
RoBit-SOD 168 168 6 5/8'' 10 0.394 127 5 182.3 7.177 147 5.787

T45

 

 

Symmetric Overburden Casing Drilling System Any Direction Drill With Ring Bit Odex Dth Hammer Bit

Contact Details
Xiamen Prodrill Equipment Co., Ltd

Contact Person: Prodrill

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