DTH Tools ODEX Rock Drilling System Drill Bit

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DTH Tools ODEX Rock Drilling System Drill Bit

 

 

Eccentric Overburden Drilling Systems (ODEX): Acedrills has ODEX types ranging from ODEX90 to ODEX280, produced with shanks of most of the prevailing DTH hammers sizing from 3” to 10”. They all consist of Guide Device, Casing Shoe, Eccentric Reamer, Pilot Bit, Guide Sleeve, and Locking Kits.

 

 ODEX Type

   90~144

   165~190

   190~280

Pilot Bit Diameter 

 

90~144mm     

166~191mm     

191~280mm     

 

For Shank of Hammer

   DHD3.5, Cop34,Mission30...

   DHD380, QL80, 360, SD6...

   QL60, Mission60,NUMA100..

 PRODUCT SPECIFICATION 

ODEX TypeRecommended Casing SizeMin. Wall ThicknessPilot Bit DiameterReamer DiameterFor Shanks of Hammer
Max. ODMin.  ID
mminchmminchmminchmminchmminch
901154 1/21024615/64903 35/641234 27/32DHD3.5, Cop34, Mission 30
1151425 19/321254 59/6479/321154 17/321556  7/64DHD340A, SD4, QL40, Mission40
1151465 3/41285  3/6479/321164  9/161526
1401686 5/81525 63/6485/161405 1/21897  7/16DHD350R, SD5, QL50, Mission50
14417871606 19/64923/641445  9/161927  9/16
1651967 23/321837 13/64615/641666 17/322118 19/64DHD360, SD6, QL60, Mission60
1802198 5/81947 5/8615/641797  3/642329 1/8
1902198 5/82058  1/1679/321917 1/22369 19/64
1902198 5/82058  1/1679/321917 1/22369 19/64DHD380, QL80, SD8, Mission 80
23027310 3/42509 27/3211.529/642299  1/6428611 1/4
24027310 3/42509 27/3211.529/642419 31/6430812 1/8
28032412 3/4305129.53/828011  1/6437814 57/64SD10, NUMA100

Notes:

     

      1. The other specifications are also available if

      upon customers’ request;

 

      2. How to order?

       Casing Tube Out Diameter & Inner Diameter +

       Reamer Bit Diameter + Minimal Casing Shoe Inner

       Diameter + Hammer Shank Style

 

For brochure and more product information, please click here 

to tell us the detail.

     

ODEX (short for “Overburden Drilling Excentric”) is also called Stratex, Tubex or ODS. It is an adaptation of the air-circulation DTH hammer. It is with a swing-out eccentric bit to ream the bottom of the casing. And the percussion bit consists of two parts fixed tips: a concentric pilot bit, and behind it is an eccentric reamer bit that swings out to enlarge the borehole diameter during drilling. After the eccentric bit is a guide device that engages a special internal shouldered casing shoe on the bottom of the ODEX casing. The ODEX is thus pulled down by the drill string as the hole is advanced. Cuttings blow up through the annulus gap between guide device and casing shoe to a swivel conducting them onto the ground or to a sample collector.

 

ODEX systems are most economical solutions for casing drilling in average ground conditions. They are very popular with drilling contractors for casing in water wells, geothermal wells, medium mini-type grouting hole of building, dam and harbour project, and shallow micro-piling work. Because of the ingenious reaming wing, the bit is retrievable and can be used again. ODEX is ideal for short holes in homogenous overburden, thanks to outstanding advantages as simple structure, easy operation, retrievable drilling tools, long service life and good quality. Drilling characteristics of ODEX systems are essentially the same as for the DTH hammer drilling method, like:

Rapid removal of cuttings;

High penetration rate, especially in resistant rock formation (e.g. basalt);

Easy soil and groundwater sampling during drilling;

Possible to measure yield estimate at selected depth in the formation;

Advantageous in unconsolidated formations with a high risk of caving (this is probably the most important feature).