Symmetric Casing Systems

SYMMETRIC CASING SYSTEMS APPLICATIONS:

Symmetric Casing Systems can be used in a wide range of applications where you need to drill in difficult ground conditions. The following are examples of the most common applications: 

• GEOTHERMAL WELL DRILLING
• WATER WELL DRILLING
• PIPE ROOFING
• FOUNDATION WORK
• ANCHORING
•  

SYMMETRIC CASING SYSTEMS DRILLING METHODS:

WOOK casing systems are available in versions for a top hammer or down-the-hole drilling. The selected drilling method depends on the diameter drilled, the depth of the hole, and the driller's preferred equipment.

DTH Drilling

DTH is a common method used to drill deep holes with great accuracy. It is suitable to use for straight piling or well drilling that requires the high performance needed for drilling large and deep holes. 

Top Hammer Drilling

Top Hammer drilling is a fast and efficient method for drilling shorter holes, straight or inclined. It is primarily used for smaller diameter holes in overburden drilling, such as anchoring piles or micro piles.

WOOKE SYMMETRIC CASING TYPES：

Retrievable Symmetric Drilling Tools with Casing Tube Step-by-Step:

The retrievable casing is used when the casing is only needed during the drilling process, that is when it is used to keep the hole open during drilling and not used as support in the finished structure.
This is a cost-effective solution for piles and anchoring since the casing is retrieved from the hole and reused.

① When the drilling starts, the central bit drives the ring bit down the hole, meanwhile the casing shoe and casing tube follow down together.

② When arriving at the bedrock, reversely rotate the tools and the central bit is pulled out from the hole.

③ During pouring the concretes through the casing tube, pull out the casing tube with the ring bit synchrony.

Permanent Symmetric Drilling Tools with Casing Tube Step-by-Step:

There are different applications where the permanent casing is the preferred choice, the most common are water wells, geothermal wells, foundation works, and pipe roofing.
In water and thermal wells, the casing is used as a sacrificial element to just keep the hole open. In foundation works, a permanent casing can work as a bearing structure of the pile, as a sacrificial element to protect the pile against corrosion, or just to keep the hole open.

① When the drilling starts, the central bit drives the ring bit down the hole, meanwhile the casing shoe and casing tube follow down together.

② When arriving at the bedrock, reversely rotate the tools and the central bit is pulled out while leaving the ring bit in the hole bottom.

③ Pouring the concretes into the casing tube or moving to the next filed work process.

WOOKE SYMMETRIC TOOLS COMPONENTS AND SPECIFICATIONS: