Eccentric casing system /ODEX system

Short Description:

Drilling through formations with loose, unconsolidated material always comes with problems such as the bore hole caving in or collapsing. How to avoid these problems? With years of field practice and research, we developed Eccentric casing system /ODEX system applicable fore strata with slit, sand or small size pebbles. With its simple structure, easy operation and reliable performance, the Eccentric casing system /ODEX system can advance the casing easily for depth within 20 meters, and it is retrievable with long service life.

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Structure of Eccentric casing system /ODEX system

Structure features

The structure of the reamer is improved from figure(a) to figure(b), which strength the wearing resistance on the back, and extend the the service life of the whole reamer.

Working procedure

Step1: When drilling starts, the system drives the casing shoe and casing tube move down.
Step2: When reaching the bedrock, lift up the block system, the blocks will closed, reverse rotation and pull out the block system from the hole.
Step3: If the hole have reach the desired depth, finish the drilling and continue other process.
Step4: If you still want to drill deeper, use the conventional DTH bit to drill to the desired depth.

Applications

Water well drilling
Eccentric system is the main drilling tool in water well projects, which can keep drilling the hole and protecting it from caing at the same time, and it can significantly reduce the drilling time when drilling through the overburden.

Micro piling
In soil, clay and sand rock formation, eccentric system is the most economic and fastest in protecting the hole from collapsing with permanent temporary casing tubes.

Anchoring
Eccentric system can meet the requirements of anchoring projects better when reinforcing the slope.

Connection with other products

	D		h	H	C		G
Model	Out Dia. of Casing (mm)	Inner Dia. of Casing (mm)	Wall thickness of casing (mm)	Guide device max. diameter (mm)	Reamed Dia. (mm)	Min. Inner Dia. of Casing Shoe (mm)	Max. Outer Dia. of Normal Bit (mm)	Hammer Type	Weight (KG)
ODEX84	108	94	7	92	117	86	84	COP34/DHD3.5	11.0
ODEX90	114	101	6.5	99	125	92	90	COP34/DHD3.5	12.5
ODEX98	127	109	9	107	138	100	98	COP44/DHD340/SD4/QL40	18
ODEX115	146	126	10	123.5	155	117	115	COP44/DHD340/SD4/QL40	22
ODEX136	168	148	10	146	180	138	136	COP54/DHD350/M50/SD5/QL50	38
ODEX146	178	158	10	156	192	147	145	COP54/DHD350/M50/SD5/QL50	42
ODEX152	183	163	10	161	196	153	151	COP54/DHD350/M50/SD5/QL50	48
ODEX152	183	163	10	161	196	153	151	COP64/DHD360/M60/SD6/QL60	56
ODEX160	194	174	10	172	206	162	160	COP64/DHD360/M60/SD6/QL60	62
ODEX185	219	199	10	196	234	187	185	COP64/DHD360/M60/SD6/QL60	84
ODEX208	244	224	10	222	263	210	208	DHD380/COP84/SD8/QL80	122
ODEX240	273	253	10	251	305	241	240	DHD380/COP84/SD8/QL80	136
ODEX280	325	300	12.5	298	350	282	280	DHD112	184