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Quick Details

  • Place of Origin: Shandong, China (Mainland)
  • Brand Name: PANDADRILL
  • Model Number: PA90,PA115,PA140,PA165PA190
  • Type: Drill Bit
  • Machine Type: Drilling Equipment
  • Certification: ISO9001
  • Material: High Manganese Steel
  • Processing Type: Forging, Machining process
  • Use: Well Drilling
  • Application: Coal Mining,Quarry drilling,DTH drilling
  • Diameter: 102-222mm
  • Color: Request
  • Transfer: Air/Sea/Express
  • Advantage: High Performance
  • Usage: Well Drilling
  • Product name: Concentric Casing System
  • Shank: Cop, QL, SD, DHD, NUMA,Mission

Packaging & Delivery

Packaging Details Ply-wooden cases + pallet
1 piece/box
Delivery Time Shipped in 15 days after payment
Product Description
ODEX Casing System,  also named Eccentric Casing System, is suitable for drilling water wells, geothermal wells, short mircopiles,medium mini-type grouting hole of building, diamond harbour project.

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

Working Principle:

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.

Casing Tube(max.O.D.)(mm)
Casing Tube (min.O.D.) (mm)
Guide Sleeve
Effective length: 174mm
Effective length: 174mm
Effective length: 205mm
Effective length: 225mm
Effective length: 250mm
Drill Pipe
Connection Thread: API2 3/8”Reg; O.D.: 76mm; Wrench Flats: 65mm
Connection Thread: API2 3/8”Reg; O.D.: 76mm; Wrench Flats: 65mm
Connection Thread: API2 3/8”Reg
O.D.: 89mm
Wrench Flats: 65mm
Connection Thread: API3 1/2”Reg
O.D.: 114mm
Wrench Flats: 95mm
Connection Thread: API3 1/2”Reg
O.D.: 114mm
Wrench Flats: 95mm
DTH Hammer
Casing Shoe
L3=90mm L4=55mm D3=101.7mm D4=93mm
L3=76mm L4=55mm D3=127.5mm D4=117mm
L3=90mm L4=63mm D3=155.3mm D4=143mm
L3=95mm L4=55mm D3=181.5mm D4=166mm
L3=110mm L4=70mm D3=204.7mm D4=193mm
Guide Device
L1=35mm L2=138mm D1=92mm D2=100mm
L1=48mm L2=136mm D1=115mm D2=126mm
L1=55mm L2=160mm D1=141mm D2=154mm
L1=61.5mm L2=181.5mm D1=165mm D2=178mm
L1=62.8mm L2=185mm D1=191mm D2=203mm
D5=91mm L5=70mm Reaming Diameter: 123mm; Reamer has 4*Ф12 buttons
D5=114mm L5=89mm
Reaming Diameter: 152mm
Reamer has 5*Ф14 buttons
D5=138mm L5=69.5mm
Reaming Diameter: 185mm
Reamer has 7*Ф14 buttons
D5=164mm L5=79.5mm
Reaming Diameter: 211mm
Reamer has 7*Ф14 buttons
D5=185.5mm L5=90.2mm
Reaming Diameter: 237mm
Reamer has 7*Ф16 buttons
Pilot Bit
D6=90mm L6=59mm Gauge button: 8*Ф12 Front button:6*Ф10
D6=114mm L6=67mm
Gauge button: 8*Ф14
Front button:6*Ф12
D6=138mm L6=66mm
Gauge button: 8*Ф16
Front button:8*Ф14
D6=165.8mm L6=82.5mm
Gauge button: 8*Ф16
Front button:8*Ф16
D6=190mm L6=82mm
Gauge button: 9*Ф18
Front button:9*Ф16
Detailed Images

Different Shanks(Same as Bits Below):

                 DHD                        MISSION                           QL                                SD

Different Buttons Shapes:

              Dome / Round button
Used as gauge buttons of DTH bits, suitable for very abrasive and very hard rock formation.

  Parabolic / Semi-ballistic
Used as gauge buttons and front buttons of DTH Bits, suitable for medium abrasive and hard rock formations.

              Ballistic button
Used front buttons of DTH bits, suitable for medium abrasive and medium hard formations. Also be used as gauge buttons for soft rock.

Operation Steps:

A:When drilling starts working,reaming sleeve will open,borehole range will increase,which will casing shoe and casing tube.
B:When finish drilling in overburden layer,pay attention to reverse circulation,reaming sleeve circles up,eccentric drilling bit lifts out from the borehole.
C:The casing that can be left in the borehole to prevent borehole from collapsing while pulling out pipe and grouting concrete.
D:Regular drilling bits can be applied to drill the depth as required in the rock stratum.

Production Application:

Our Service

Professional R&D Team

First-Class Sales Team

Effective Production Team

Perfect After-Sales Service Team

Packing & Delivery

Ply-Wooden Boxes + Pallet

Protect your goods from door to door

By Air/Sea/Express

Fast and Safe Delivery Team

Related Products

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DTH Pipes

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96.8% Response Rate



Q1: Can I have a sample for testing?

A:Samples are still to be paid but discounted price can be provided.

Q2: Do you have the inspection procedures?

A:100% strict inspection and testing for every order before packing.

Q3: How can i get the after sale services?

A:Free replacement will provide once the problems casued by our product quality.

Q4: Can I have a visit to your factory before the order?

A: Sure, welcome, here is our address: Yantai, Shandong.


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