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Another challenge is the presence of natural fractures and cavities within the limestone. These can lead to instability during drilling, potentially causing borehole collapse or drilling deviation. To address this, engineers use techniques like underreaming or casing to reinforce the hole and maintain stability. Additionally, detailed geological surveys are conducted before drilling to identify and map these features, allowing for strategic planning Additionally, detailed geological surveys are conducted before drilling to identify and map these features, allowing for strategic planning Additionally, detailed geological surveys are conducted before drilling to identify and map these features, allowing for strategic planning Additionally, detailed geological surveys are conducted before drilling to identify and map these features, allowing for strategic planningdrilling through limestone.

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There are several types of core drill bit extension rods available, including straight extension rods, tapered extension rods, and threaded extension rods. Each type has its own unique design and is used for specific drilling applications. Straight extension rods are used for drilling straight holes, tapered extension rods are used for drilling holes with a conical shape, and threaded extension rods are used for attaching different types of drill bits to the extension rod.

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Dry FGD systems, on the other hand, use a solid sorbent, like limestone or lime, to react with the SO2. The resulting compound is then removed from the gas stream through a filtration process. Although less efficient than wet FGD, it is more suitable for smaller installations due to its lower capital cost Although less efficient than wet FGD, it is more suitable for smaller installations due to its lower capital cost Although less efficient than wet FGD, it is more suitable for smaller installations due to its lower capital cost Although less efficient than wet FGD, it is more suitable for smaller installations due to its lower capital costflue gas desulfurization.

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