ODEX Eccentric Casing System

Wherever there’s a well to be drilled there’s always a need to case the overburden layer. This is where this tried and tested eccentric casing drilling system has proven itself to be the ideal solution. In fact, ODEX Eccentric Casing System has become synonymous with water well casing drilling....

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ODEX Eccentric Casing System is the specialist in normal overburden conditions and shorter holes.Where there’s medium to hard ground or a need for larger diameter casings then Symmetrix is right choice. In fact there is almost no limit to the depth Symmetrix can drill - just keep adding on casings.

ODEX Eccentric Casing System is an eccentric retrievable drilling system that’s ideal for short holes up to 273mm (10 3/4") in diameter. Well drillers often have an Odex drill bit at hand for simultaneous casing of water and geothermal wells. The advantage is that Odex drills and installs the casing quickly and efficiently. While the ingenious bit system allows the complete drill bit to be retrieved-ready to drill the next hole.

Ingenious eccentric system

ODEX Eccentric Casing System is an ingeniously designed eccentric drilling system which consists of a pilot bit and reamer “wing”. The pilot bit protrudes beneath the casing pipe and, as the drill rotates, a specially designed “wing” folds out and acts as a reamer. This creates the space for the casing pipe to advance. Once through the overburden, Odex makes a socket in the bedrock allowing the casing to be fixed in place. Then, by simply reversing the drilling rotation, the wing retracts into the pilot bit and the whole drill string can be removed from the hole leaving the casing pipe in place.

Retrievable and reusable

For well drillers, it’s imperative to have a casing drilling system that’s easy to drill with any DTH drill rig. That’s where Odex comes into its own. Thanks to the ingenious reaming wing the bit is retrievable and can be used at the next well.

Push or pull casing pipes

ODEX Eccentric Casing System can be equipped with casing shoe shoulder or without one. By using a casing shoe shoulder, the casing pipe is pulled into hole. When there is no casing shoes shoulder present, the casing pipe is pushed into the hole.

Odex Casing a Water Well


Reamer wing swings out and the casing advances


Reamer wing retracts


The pilot bit is removed and a sealing mixture is poured in


A DTH bit drills through the seal and starts drilling the well



ModelOuter Dia. of Casing TubeInner Dia. of Casing Tube(mm)Wall thickness of casingReamed Dia.Min. Inner Dia.of Casing ShoeHammer TypeDrill PipesWeight
ODEX for DTH Drilling

ODEX Eccentric Casing System




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The information you may like to know before order:

1. Q:Methods of Payment:

A: T/T (Telegraphic Transfer) or Western Union or L/C at sight

2. Q: Handling time for an order

A: Generally it is 5-10 days if the goods are in stock. or it is 15-20 days if the goods are not in stock, it is according to quantity.

3. Q: Shipping way

A: Sample order: we suggest Courier express like DHL/UPS/TNT/FEDEX or by air

Bulk order: we suggest by air or by sea.

5. Q: Quality Control

A: We have our own experienced QC.

There will be strict inspection and testing for every order before shipping out.

6.  Q: After Services:

A: (1). Our sales team will resp    onse for your question within 24 hours (Holidays

(3). Free replacement will provide once the failure confirmed caused by our product quality

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ODEX Eccentric Casing System

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