Concentric Casing System With Wings
Concentric Casing System With Wings

 

 

                                                                                      

                    Assembly                                                                              Guide Device                                              Wings

 

 

 

 

                                     

Operation Procedure
1.when the drilling starts, the wings swing out, and reams to drive the casing shoes and tubes into the hole.
2. When finished the drilling in overburden rock formations, reverse the drilling tools and the wings will
get closed, and the drilling tools can be raised from the hole.
3. Next construction can be followed.

 

 

Main specification: 
A B C D E F
Outer Dia.of Casing Tube

Inner Dia.of Casing Tube

 Reamed Dia. Min.Inner Dia.of Casing Shoe Hammer Type Drill Pipes
mm mm mm mm   mm
114 101-103 125 93 TH79 60
140 124-127 152 113 TH98 76
146 127-132 154 115 TH98 76
168 149-155 184 138 TH122 76,89
178 159-165 194 148 TH122 76,89
193 173-180 206 164 TH139 114
219 199-206 234 185 TH139,TH180 114
244 224-231 273 219 TH180 114

Order Guide:A+B+C+D+E