WDT series

Article: 00092939

Self-boring casing

Through years of experience and development in close coordination with drillers, Western Drilling Tools has developed the WDT Drop-Off Casing System. This casing advancement system is perhaps the most cost effective way to set single use casing. In addition to relatively low cost this is still a premium quality drilling tool capable of reaching astounding depths. It was designed to drill concentric holes for single use or retrievable casing. The drop off ring has a larger diameter than the casing. The guide device shoulders up to the casing shoe and the drop of ring is attached. Once coupled with a DTH hammer the driller slowly rotates the drill string and the guide device advances the casing. Once the required depth is met the driller rotates the drill string in the opposite direction dropping the ring in the hole and by applying tension allowing for the retrieval of the guide devices and the rest of the drill string. The drop off casing system is typically used in casing water wells, setting pilings and foundations for bridges and buildings, slant or horizontal drilling, environmental monitoring wells and grouting operations.

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