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Eccentric Casing system
BESTLINK
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.
Application Range
This product is made of alloy of high quality and apply for advanced high-frequency welding technology and maturity of heat treatment process, greatly improving the intensity, wear resistance and impact toughness of cutter head, increasingly prolonging the working life, enhancing the drilling efficiency.
It is recommended to drill in rock formation where contains some ovals and fractures.
Design Principles
Make the casing follow easy and the equipment and operation simple
Outstanding Advantages
The stable and reliable working performance and the less vibration of drill rig and flexible to open and close.
Order Guide: product type.
Specifications
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=280mm,D4=203mm | D5=266mm,L5=120mm, reaming diameter=378mm, reamer has22*Φ18buttons | D6=280mm,L6=135mm, gauge button=12*Φ18mm, face button:27*Φ16mm |
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.
Application Range
This product is made of alloy of high quality and apply for advanced high-frequency welding technology and maturity of heat treatment process, greatly improving the intensity, wear resistance and impact toughness of cutter head, increasingly prolonging the working life, enhancing the drilling efficiency.
It is recommended to drill in rock formation where contains some ovals and fractures.
Design Principles
Make the casing follow easy and the equipment and operation simple
Outstanding Advantages
The stable and reliable working performance and the less vibration of drill rig and flexible to open and close.
Order Guide: product type.
Specifications
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=280mm,D4=203mm | D5=266mm,L5=120mm, reaming diameter=378mm, reamer has22*Φ18buttons | D6=280mm,L6=135mm, gauge button=12*Φ18mm, face button:27*Φ16mm |
