PRODRILL Overburden System 90mm
Prodrill produces the ODEX Eccentric Overburden Drilling System, starting with the ODEX90 to suit 114mm O. D. Casings. This two-piece system comprises the shank bit holder and the eccentric pilot bit that is secured in the bit holder by a double interlocking pin. This is easily removed to allow for bit are sharpening or replacement. Prodrill ODEX overburden drilling systems are widely used in a variety of applications from well drilling and mining to rock anchoring and site investigation.
Application Range:
It is suitable for drilling water wells, geothermal wells, short mircopiles, medium mini-type grouting hole of building, dam and harbour project.
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 drilling.
Hammer |
Pilot
diameter |
Reamed
diameter |
Casing tube
outside
diameter |
Casing
tube wall
thickness
max. |
Casing
tube wall thickness
w/o casing
shoe max. |
ODEX 90 |
3" |
3-9/16" |
4-13/16 |
4-1/2 |
1/4 |
ODEX 115 |
3"-4" |
4-1/2" |
6 |
5-1/2 |
1/4 |
ODEX 127 |
4" |
5" |
6-1/2 |
6 |
1/4 |
ODEX 140 |
4"-5" |
5-1/2" |
7-1/8 |
6-5/8 |
1/4 |
ODEX 152 |
5"-6" |
6" |
7-9/16 |
7 |
1/4 |
ODEX 165 |
5"-6" |
6-1/2" |
8-7/32 |
7-5/8 |
1/4 |
ODEX 190 |
6"-8" |
7-1/2" |
9-1/4 |
8-5/8 |
1/4 |



Rock drilling tools manufacturer ProDrill: Retrievable symmetric drilling system by DTH hammer is designed to drill and case a hole simultaneously through unstable ground conditions. The driver rock drill bits incorporated with a satisficial ring or reusable ring makes a full face head design which significantly improves the penetration rate and hole straightness of drilling. The internal flushing grooves together with the built-in casing shoes gives a good seal to the button of the drilling hole, minimizing the disruption of the drill hole's surrounding.
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Ps.: Others about Prodrill Equipment Co., Ltd
1. Prodrill Main Products as below:
1) Rock drill:
Handheld rock Drill (Jackhammer): Y10, Y18, Y20, Y24, Y26, TY24C, etc;
Airleg rock drill: YT24, YT28, etc;
Gasoline rock drill: YN27
2) Drill rod: Taper rod (hex. 22 * 108mm)
3) Drill bit: Taper button bit, Taper chisel bit, Taper cross bit; Thread button bit (Top hammer); DTH Hammer and DTH bit; Overburden Drilling System
4) Splitter: Handheld stone splitter (or shims and wedges or plug and feather), G10 pneumatic splitter; Hydraulic Splitter
5) Breaker: Hydraulic Breaker, Pneumatic Breaker G10, TPB, etc;
6) Splitting or Cracking Powder for Construction/ Quarry/ Rock: Expansive mortar Soundless Cracking Agent; High Range Soundless Cracking Agent
2. Advantages:
Compared the Rock Drilling Tools with the oversea brands, our advantages are bellowing:
a. Our products can match over 95% against the original products
b. Price are competitive against the famous brands and best quality against the small factory
3. About Us:
1. Our factory has been specialized in manufacturing drilling tools and spare parts for over 10 years.
2. We have advanced technology and equipment.
3. Our technician has more than 13 year's professional working experience.
4. Rock drilling tools are exported throughout the world. Main market: Norway, Turkey, USA, Canada, Australia, Brazil, Uruguay, Iran, Philippines, Thailand, India, etc.
4. Welcome your question and inquiry