29 WorldWide Drilling Resource® Making a Case for Casing Advancement Systems Adapted from TerraRoc A drilling casing, or casing advancement system, is a type of drilling tool which enables casing and drilling simultaneously. It can be used with rotary percussion drilling where the impact of the hammer drives the casing down the wellbore. Engineers are continually challenged with the risk of hole collapse when faced with drilling through overburden, unconsolidated formations, or highly fractured rock. This is why it is prudent to use casing advancement systems to get through overburden while advancing the drilling casing and protecting the hole at the same time. Installing casing as the hole is drilled helps to stabilize loose or unpredictable formations and shore up the hole, enabling projects to be completed faster and more efficiently. This is particularly useful when penetrating clay, silt, sand, gravel, cobbles, boulders, and fractured rock. Casing advancement systems add value whether installing foundations, support elements, or casing a hole in formations where hole collapse is possible. They are useful when drilling a geothermal well as they keep the hole open during installation of the heat exchange system and minimize impact on the surrounding structures. They also prevent the collapse of the well during drilling where ground conditions are unstable. Water well drilling is commonly done in urban areas where drilling at speed is necessary to minimize disruptions to residents, as well as in the developed area where drilling is taking place. In these instances, casing advancement systems are used to case the hole as it is drilled, providing stability for the hole, and preventing collapse which could cause contamination of the water supply or damage to nearby city structures. This helps contractors complete projects more quickly, keeping disruption to a minimum. Contractors find casing advancement systems offer a fast and easy way to construct load-bearing walls in challenging ground conditions. These systems offer huge savings in construction time and materials by simplifying the construction process. Tieback anchor installation also benefits from casing advancement systems to keep the hole open after drilling is complete. Every drilling project comes with its own set of unique challenges, whether drilling in difficult ground, ensuring the safety of workers, minimizing surrounding structural damage, or improving productivity to fast-track projects and minimize disruption in built environments. Fortunately, casing advancement systems offer a spectrum of solutions to meet project demands in the most efficient way possible. WTR Looking for Events? Click on this box in our online issue worldwidedrillingresource.com
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