Concentric Casing System with Wings

Product Detail

Application Range

It is recommended to drill in rock formation where contains some ovals and fracture.




Design Principles

The stable and reliable working performance and the less vibration of drill rig.




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.




Model	Outer Dia. of  Casing Tube	Inner Dia. of  Casing Tube	Wall thickness   of casing	Reamed Dia.	Min. Inner   Dia.of Casing Shoe	Hammer Type	Drill Pipes	weight (kg)
90	114	101	6.5	125	91	COP32/COP34/DHD3.5/BR3/MACH303	76	15
98	127	108	9.5	136	99		76	18
110	133	124	9.5	145	112	COP44/DHD340/MACH44/MISSION40/SD4/XL4/QL40	76/89	20
115	146	125	10.5	154	117		76	24
140	168	148	10	180	138		76/89	32
146	178	158	10	192	148	COP54/DHD350/MACH50/MISSION50/SD5/QL50	76/89	38
165	193	173	10	206	164	COP62/COP64/DHD360/MISSION60/SD6/XL6/QL60/TD150	114	75
190	219	199	10	234	185		114	88