Mining

Eccentric overburden casing drilling systems

Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole

Description

SINODRILLS Eccentric overburden casing drilling systems


Casing drilling, or casing while drilling (CWD) process, is a concept that combining two time-consuming processes, drilling and casing together, performing them at the same time. During the CWD process, powered by DTH hammer, a central piloting bit drives a ring bit to drill a hole wide enough for a casing tube to slide down, drilling and casing processes are therefore performed at the same time.


Eccentric is the most economical solutions because its ingenious reaming wing the bit is retrievable can be used at the next hole. This is particularly design for shallow holes, as is often the case in water well drilling, geothermal wells and for shallow micro-piling work. Odex is ideal for short holes in consolidated overburden. The component of Eccentric system consists of Pilot bits, Reamer bits, Guide device and casing shoe.


When drilling, the reamer bit will rotate out to enlarge the hole which enough for the casing tube slide down behind the reamer. When reached required depth, the drill pipe will drill to the reverse direction and the reamer bit will retract, it is allowing the whole drilling system to pass through the casing.


Features

• Complete types of drilling tools suitable for casing tubes with various diameters;

• Good stability and reliability granted by premium alloy steel material and fine CNC manufacturing process;

• Cost-effectiveness realized by mass production.


Applications

Water well drilling, geothermal well drilling, foundation piling, geological prospecting, etc.



Structure


01 - Drill Pipe02 - Guide Sleeve03 - Steel Casing
04 - DTH Hammer05 - Guide Device06 - Casing Shoe
07 - Reammer08 - Pilot Bit09- Guide Device
10 - Casing Shoe11 - Reammer12 - Pilot bit


GSE-EDS82 Eccentric Drilling System (ODEX82)


    GSE-EDS82 Eccentric Drilling System (ODEX82) shank for IR3.5 DTH Hammer (other shanks are optional)



    Alternative casings may by used:



    Maximum outside diameter (mm)


108


    Minimum inside diameter (mm)


96


    Wall thickness (mm)


6


GSE-EDS90 Eccentric Drilling System (ODEX90)



    GSE-EDS90 Eccentric Drilling System (ODEX90) shank for DHD3.5 DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


115


    Minimum inside diameter (mm)


102


     Wall thickness (mm)


6


GSE-EDS115A Eccentric Drilling System (ODEX115A)


  

    GSE-EDS115A Eccentric Drilling System (ODEX115A) Shank for IR DHD340A DTH Hammer (others are optional)


 

    Alternative casings may be used:


  

    Maximum outside diameter (mm)


142


    Minimum inside diameter (mm)


128

 

    Wall thickness (mm)


7


GSE-EDS115B Eccentric Drilling System (ODEX115B)



   

    GSE-EDS115B Eccentric Drilling System (ODEX115B) Shank for DHD340 DTH Hammer (others are optional)


  

    Alternative casings may be used:


  

    Manximum outside diameter (mm)


146

 

    Minimum inside diameter (mm)


130

  

    Wall thickness (mm)


8



GSE-EDS140 Eccentric Drilling System (ODEX140)


   

    GSE-EDS140 Eccentric Drilling System (ODEX140) Shank for IR DHD350R DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


168


    Minimum inside diameter (mm)


152


    Wall thckness (mm)


8


GSE-EDS145 Eccentric Drilling System (ODEX145)




    GSE-EDS145 Eccentric Drilling System (ODEX145) Shank for IR DHD350R DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


178


    Minimum inside diameter (mm)


158


    Wall thickness (mm)


9


GSE-EDS147 Eccentric Drilling System (ODEX147)




    GSE-EDS147 Eccentric Drilling System (ODEX147) Shank for IR DHD350R DTH Hammer (others are optional)



    Alternative casing may be used:



    Maximum outside diameter (mm)


183


    Minimum inside diameter (mm)


163


    Wall thickness (mm)


10


GSE-EDS165 Eccentric Drilling System (ODEX165)




    GSE-EDS165 Eccentric Drilling System (ODEX165) Shank for IR DHD360 DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


195


    Minimum inside diameter (mm)


182


    Wall thickness (mm)


6.5


GSE-EDS180 Eccentric Drilling System (ODEX180)




    GSE-ED180 Eccentric Drilling System (ODEX180) Shank for DHD360, COP64, SD6 DTH Hammer



    Alternative casing may be used:



    Maximum outside diameter (mm)


219


    Minimum inside diameter (mm)


194


    Wall thickness (mm)


12.5


GSE-EDS190 Eccentric Drilling System (ODEX190)




    GSE-EDS190 Eccentric Drilling System (ODEX190) Shank for IR DHD360 DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


219


    Minimum inside diameter (mm)


205


    Wall thickness (mm)


7



GSE-EDS230 Eccentric Drilling System (ODEX230)



    GSE-EDS230 Eccentric Drilling System (ODEX230) Shank for IR DHD380 DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


273


    Minimum inside diameter (mm)


250


    Wall thickness (mm)


11.5


GSE-EDS240 Eccentric Drilling System (ODEX240)




    GSE-EDS240 Eccentric Drilling System (ODEX240) Shank for IR DHD380 DTH Hammer (others are optional)



    Alternative casings may be used:



    Maximum outside diameter (mm)


273


    Minimum inside diameter (mm)


260


    Wall thickness (mm)


6.5


Please contact our sales team for more specifications.