• Color：Gold, Red
• Hammer Type：3inch, 4inch
• Outer Dia. of Casing Tube：114 ~ 168mm
• Inner Dia. of Casing Tube：101 ~ 148mm
• Wall Thichness of Casing Tube：6.5 ~ 10.5mm
• Transport Package：Wood Package
• Specification：CE
• Trademark：PRODRILL
• Origin：China
• HS Code：84671900
• Production Capacity：10000pec,Months

Outer Dia. of
Casing Tube
Inner Dia. of
Casing Tube
Reamed Dia.
 Min. Inner Dia. of
Casing Shoe
 Drill Pipes
Max. Outer Dia. of
Normal Bit
mm
Mm
mm
mm
mm
mm
108
93-99
118
86
76
77
114
101-103
127
91
76
82
127
114-116
136
101
76
92
140
124-127
152
117
76
105
146
127-132
154
117
76
105
168
149-155
184
140
76,89
125
178
159-165
194
150
76,89
140
193
173-180
206
164
89,114
150
219
199-206
234
184
89,114
165
244
224-231
260
210
114
190
273
251-257
305
240
114,127
220
323
301-310
348
284
127
255
406
382-388
440
364
140
340
457
433-439
488
413
140
385
508
484-490
538
464
140
440

Concentric (or Symmetrix) Overburden Casing System with Blocks
Model: 1) Casing Shoe + pilot bit + 2 pcs Blocks; Or
2) Casing Shoe + pilot bit + 3 pcs Blocks; Or
3) Casing Shoe + pilot bit + 4 pcs Blocks.


Concentric (or Symmetric or Symmetrix) Overburden Casing System With Wings
Symmetric or Symmetrix Overburden Casing Drilling System With Wings
Symmetrix Overburden Casing Drilling System With Two Wings

Concentric Overburden Casing System

Outstanding:
1. The stable and reliable working performance and the less vibration of drill rig.
2. Flexible to open and close.

Design Principles:
Make the casing follow easy and the equipment and operation simple
The stable and reliable working performance and the less virbration of drill rig.

Operation Procedure:
1. When the drilling starts, the blocks slides down through the grooves on pilot bit, and reams to drive the casing shoes and tubes into the hole.

2. When finished the drilling in overburden rock formations, raise the drilling tools and the blocks will get closed through the grooves, and the drilling tools can be pulled out from the hole.

3. Next construction can be followed.

Product Photos:



Size and Specification:



Dear Sir or Madam: You can order
1) Wings (2pcs) + Locking System + Guide Device = Assembly
2) Or order separately.
3) If you need o. Dia. 178mm or above, we suggest to use our SLIDE BLOCKS model.


Application Range and Examples:
It is recommended to drill in rock formation where contains some ovals and fractures.

Warranty
The company is responsible for any problem caused by defaulty of material and maching.
The broken parts will be replaced at the sight of photos and product serial code.

Other Structures:
Concentric (or Symmetric or Symmetrix) Overburden Casing System: With ring bits, with wings and with slide blocks.
 

Product Name:	Concentric casing system with ring bit & Concentric casing system (Permanent)
Material:	carbide
MOQ:	5pcs
Design Principles	Make the casing follow easy and the equipment and operation simple
Type	Concentric casing system
Application	It is recommended to drill in rock formation where contains some ovals and fractures.
Certificate	ISO9001   SONCAP
Outstanding Advantages	The stable and reliable working performance and the less vibration of drill rig and flexible to open and close.