Bestlink Symmetric Overburden Drilling System

• Customized: Non-Customized
• Standard: API, ISO
• Length: Casing System
• Type: Casing System
• Material: High Speed Steel
• Usage: Well Drilling
• Power Type: Drill
• Color: Blue
• Function: New
• Transport Package: Carton
• Specification: ODEX90-280
• Trademark: Bestlink
• Origin: China
• HS Code: 82071990
• Production Capacity: 5000000PCS Per Year

Product Description

Eccentric Casing system:

Eccentric Casing system is suitable for drilling water wells, geothermal wells, short mircopiles,medium mini-type grouting hole of building,damand harbour project.
- Rapid removal of cuttings; High penetration rate, especially in resistant rock formation;
- Easy soil and groundwater sampling during drilling;
- Possible to measure yield estimate at selected depth in the formation;
- Advantageous in unconsolidated formations with a high risk of caving 

Casing drilling involves drilling and casing a well simultaneously through unstable ground conditions, In casing drilling process, down the hole tools can be retrieved, through the casing on wire-line, meaning tool recovery or replacement of tools
can take minutes versus hours under conventional methods. This process employs wire line-retrievable tools and a drill-lock assembly, permitting bit and BHA changes, coring, electrical logging and even directional or horizontal drilling. Once the casing point is reached, the casing is
cemented in place without tripping pipe.
 
Casing drilling has been employed in many countries as an effective method of reducing the overall drilling costs by reducing drilling time and drill string problems
encountered during conventional drilling process.
 
Applications:
Blast holes
Water supply wells
Bridge and building foundations
Standard slant or horizontal drilling
Mining air holes
Environmental monitoring wells
Grouting operations
Seismic shot holes
Soil sample and geotechnical applications
Ground anomaly and tiebacks
Storage caverns and dam
 
Technical Data: 

Type	Casing Tube OD(mm)	Casing Tube ID(mm)	Casing wall thickness(mm)	Guide Device max size(mm)	Reamed Dia (mm)	Casing shoe mini Dia(mm)	Pilot bit D (mm)	Hammer type
ODEX85	108	94	7	92	117	86	85	COP34/DHD3.5
ODEX90	114	101	6.5	99	125	92	90	COP34/DHD3.5
ODEX98	127	109	9	107	138	100	98	COP34/DHD3.5
ODEX115	146	126	10	123.5	155	117	115	COP44/DHD340/SD4/QL40
ODEX140	168	148	10	146	180	138	136	COP54/DHD350/SD5/QL50
ODEX145	178	158	10	156	192	147	145	COP54/DHD350/SD5/QL50
ODEX152	183	163	10	161	196	153	151	COP54/DHD350/SD5/QL50             COP64/DHD360/SD6/QL60
ODEX165	194	174	10	172	206	162	160	COP64/DHD360/SD6/QL60
ODEX190	219	199	10	196	234	187	185	COP64/DHD360/SD6/QL60
ODEX208	245	225	10	222	263	210	208	COP84/DHD380/SD8/QL80
ODEX240	273	253	10	251	305	241	240	COP84/DHD380/SD8/QL80
ODEX280	325	300	12.5	298	350	282	280	DHD112/DHD38