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Down The Hole Drilling Tools - Eccentric Overburden Drilling System

Down The Hole Drilling Tools - Eccentric Overburden Drilling System. Application Range:The eccentric overburden drilling system is suitable for drilling water wells, geothermal wells, micro piles, and medium mini-type grouting holes in buildings, dams and harbor projects.

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  • Eccentric Overburden Drilling System
  • BESTLINK

Down The Hole Drilling Tools - Eccentric Overburden Drilling System


Application Range:
The eccentric overburden drilling system is suitable for drilling water wells, geothermal wells, micro piles, and medium mini-type grouting holes in buildings, dams and harbor projects.
 
Design Principles:
The casing makes the drilling system easy to follow and operate.

Eccentric Casing system (3) 
Outstanding Advantages:
Simple structure, easy operation, reliable quality, retrievable drilling tools, and long service life.
 
Operation Procedure
As soon as the drilling starts, the reamer opens and enlarges the hole to drive the casing shoe and casing tube down.
When drilling in over-burden formation is complete, start reverse circulation in order to close the reamer. Then pull up the assembly through the casing tube.
The casing tube can be left in the hole, or can be pulled out by means of grout sealing material.
Use the normal drilling tools to drill and achieve the desired depth.


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



Bestlink Factory

Xiamen Bestlink Factory Co., Ltd  is  committed  to  provide  the  best  drilling  and  cutting machine,  tools and accessories products in marble and granite stone quarrying,  as well as in civil engineering application, especial demolition project. it is now a leading manufacturer of cutting and drilling equipment for the extraction of marble, granite  and ornamental stones in china.  

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