Odex Eccentric Overburden Casing Drilling Systems Drilling Bits

ODEX ECCENTRIC CASING SYSTEM

In the projects of drilling,drillers often meet with problems due to the loose land formation.These may cause troubles such as difficulty in drilling down,collapse of holes,damage of drilling tools,etc.To solve the problems,the best way is to use (ODEX)Overburden Drilling System which can prevent holes and drilling tools from damage,and support the holes by casing tubes.

General Introduction 
HOD90 HOD115 HOD140 Overburden casing system,ODEX system, Casing drilling system,eccentric casing system
1.drill in overburden unstable rock 
2.one step to drill and follow casing 
3.flexible to open or close 
4.effecient below 300mm 
 
Design Principles:
Make the casing follow easy and the equipment and operation simple 
Outstanding Advantages 
Simple structure,simple operation,reliable quality,retrievable drilling tools,long service life.
 
Raw Material 
Steel:
first class special alloy steel with high strength, heat resistance and wearable
Carbide
The best tungsten carbides from China are commonly applied.
Tungsten carbide from European is also available.

Eccentric Reamer System Step-by-step 
1. When drilling starts, the reamer swings out and reams the pilot-hole wide enough for the casing tube to slide down behind the drill bit assembly. 
2. When the required depth is reached, rotation is reversed carefully, whereupon the reamer swings in , allowing the drill bit assembly to be pulled up through the casing. 
3. Casing tubes that are to be left in the drill hole should be sealed at the bottom of the hole by means of cement grout or some other sealing agent. 
4. Drilling continues to the desired depth in the bedrock using a conventional drill string.
 

Type	1.Casing tube	2.Drill pipe	3.Guide sleeve	4.DTH hammer	5.Casing shoe	6.Guide device	7.Reamer	8.Pilot bit
HOD90	Maximum OD:115mm Minimum ID:102mm	connection thread:API 2 3/8"REG OD:76mm wrech flats:65mm	Effective length: 174mm	HD35,COP32, IR3.5,QL30	L3=90mm,L4=55mm, D3=101mm,D4=93mm	L1=35mm,L2=138mm, D1=92mm,D4=100mm	D5=91mm,L5=70mm, reaming diameter=123mm, reamer has4*Φ12buttons	D6=90mm,L6=59mm, gauge button=8*Φ12mm, face button:6*Φ10mm
HOD115	Maximum OD:142mm Minimum ID:128mm	connection thread:API 2 3/8"REG OD:76mm wrech flats:65mm	Effective length: 174mm	HD45,COP44, SD4,DHD340A,QL40,HM4	L3=76mm,L4=55mm, D3=127.5mm,D4=117mm	L1=48mm,L2=136mm, D1=115mm,D4=126mm	D5=114mm,L5=89mm, reaming diameter=152mm, reamer has5*Φ14buttons	D6=114mm,L6=67mm, gauge button=8*Φ14mm, face button:6*Φ13mm
HOD140	Maximum OD:171mm Minimum ID:155.6mm	connection thread:API 2 3/8"REG OD:89mm wrech flats:65mm	Effective length: 205mm	HD55,COP54, SD5,DHD350R,QL50	L3=90mm,L4=63mm, D3=155.3mm,D4=143mm	L1=55mm,L2=160mm, D1=141mm,D4=154mm	D5=138mm,L5=69.5mm, reaming diameter=185mm, reamer has7*Φ14buttons	D6=138mm,L6=66.5mm, gauge button=8*Φ16mm, face button:8*Φ14mm
HOD165	Maximum OD:195mm Minimum ID:182.6mm	connection thread:API 3 1/2"REG OD:114mm wrech flats:95mm	Effective length: 225mm	HD65,COP64, SD6,DHD360, QL60	L3=95mm,L4=55mm, D3=181.5mm,D4=166mm	L1=61.5mm,L2=181.5mm, D1=165mm,D4=178mm	D5=164mm,L5=79.5mm, reaming diameter=211mm, reamer has7*Φ14buttons	D6=165mm,L6=82.5mm, gauge button=8*Φ16mm, face button:8*Φ16mm
HOD190	Maximum OD:222mm Minimum ID:205mm	connection thread:API 3 1/2"REG OD:114mm wrech flats:95mm	Effective length: 285mm	HD65,COP64, SD6,DHD360, QL60	L3=110mm,L4=70mm, D3=204.5mm,D4=193mm	L1=62.5mm,L2=184.5mm,D1=191mm,D4=203mm	D5=185.5mm,L5=90.2mm, reaming diameter=237mm, reamer has7*Φ16buttons	D6=190mm,L6=82mm, gauge button=9*Φ18mm, face button:9*Φ16mm
HOD240	Maximum OD:273mm Minimum ID:260.4mm	connection thread:API 3 1/2"REG OD:114mm wrech flats:95mm	Effective length: 343mm	HD85,COP84, SD8,DHD380, QL80	L3=110mm,L4=65mm, D3=259mm,D4=241mm	L1=70mm,L2=190mm, D1=240mm,D4=256mm	D5=238mm,L5=100mm, reaming diameter=308mm, reamer has14*Φ16buttons	D6=240mm,L6=89.5mm, gauge button=12*Φ16mm, face button:18*Φ16mm
HOD280	Maximum OD:324mm Minimum ID:305mm	connection thread:API 4 1/2"REG OD:114mm wrech flats:95mm	Effective length: 305mm	SD10,NUMA100	L3=125mm,L4=75mm, D3=304mm,D4=281mm	L1=97mm,L2=254mm, D1