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2. Roller cone bit - Wikipedia

   en.wikipedia.org/wiki/Roller_cone_bit

   Roller cone bit. A roller-cone bit is a drill bit used for drilling through rock that features 2 or 3 abrasive, spinning cones that break up rock and sediment as they grind against it. Roller-cone bits are typically used when drilling for oil and gas. [1] A water jet flowing through the bit washes out the rock in a slurry.

3. Drifter drill - Wikipedia

   en.wikipedia.org/wiki/Drifter_drill

   Rock drill mounted on a tripod. The large objects on the legs are weights to anchor it down into position. In reciprocating power drills, the drilling cylinder is mounted on a feed-screw, such that as the hole is drilled and the drilling point recedes from the rock face, the drill-bit continues to move into it, while the anchor point (on the tripod or column) remains in place. [11]

4. Exploration diamond drilling - Wikipedia

   en.wikipedia.org/wiki/Exploration_diamond_drilling

   Drilling mud is injected into the drill pipe, so as to wash out the rock cuttings produced by the bit and also to reduce the heat produced due to friction which causes less wear and tear of the bits. [5] An actual diamond bit is a complex affair, usually designed for a specific rock type, with many channels for washing. [6]

5. Bore Through Tough Concrete and Brick With These Masonry ...

   www.aol.com/lifestyle/bore-tough-concrete-brick...

   These 3/16-inch Bosch bits are the perfect size for drilling pilot holes for ¼-inch Tapcon concrete screws, and more than provide the minimum 1-inch depth required. With 5 identical bits, this ...

6. Down-the-hole drill - Wikipedia

   en.wikipedia.org/wiki/Down-The-Hole_Drill

   Down-the-hole drill. A down-the-hole drill, usually called DTH by most professionals, is basically a jackhammer screwed on the bottom of a drill string. The fast hammer action breaks hard rock into small cuttings and dust that are evacuated by a fluid (air, water or drilling mud). The DTH hammer is one of the fastest ways to drill hard rock.

7. Well drilling - Wikipedia

   en.wikipedia.org/wiki/Well_drilling

   Tricone rock bit. Well drilling is the process of drilling a hole in the ground for the extraction of a natural resource such as ground water, brine, natural gas, or petroleum, for the injection of a fluid from surface to a subsurface reservoir or for subsurface formations evaluation or monitoring. Drilling for the exploration of the nature of ...