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2. Deep hole drilling - Wikipedia

   en.wikipedia.org/wiki/Deep_hole_drilling

   Solid carbide tools are often used for smaller tool diameters and tools with a high-performance design. With these more powerful tools, the drill head and the shank are made of a single carbide rod. The drill head is usually made of carbides of the ISO cutting application group K 10 to K 20 and is coated if required.

3. Well drilling - Wikipedia

   en.wikipedia.org/wiki/Well_drilling

   The factors affecting drill bit selection include the type of geology and the capabilities of the rig. Due to the high number of wells that have been drilled, information from an adjacent well is most often used to make the appropriate selection. Two different types of drill bits exist: fixed cutter and roller cone. A fixed cutter bit is one ...

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   Drill bit. From top: Spade, brad point, masonry, and twist drills bits. Drill bit (upper left), mounted on a pistol-grip electric drill. A set of masonry drills. A drill bit is a cutting tool used in a drill to remove material to create holes, almost always of circular cross-section. Drill bits come in many sizes and shapes and can create ...

5. High-speed steel - Wikipedia

   en.wikipedia.org/wiki/High-speed_steel

   High-speed steel. High-speed steel (HSS or HS) is a subset of tool steels, commonly used as cutting tool material. It is superior to high- carbon steel tools in that it can withstand higher temperatures without losing its temper (hardness). This property allows HSS to cut faster than high carbon steel, hence the name high-speed steel.

6. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   An annular cutter, named after the annulus shape, cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center. [1] An annular cutter is a more expensive and efficient alternative to spiral drill bits and standard hole saws. An annular cutter is similar to a hole saw but differs in geometry and material.

7. Drill bit (well) - Wikipedia

   en.wikipedia.org/wiki/Drill_bit_(well)

   Drill bit (well) In the oil and gas industry, a drill bit is a tool designed to produce a generally cylindrical hole (wellbore) in the Earth’s crust by the rotary drilling method for the discovery and extraction of hydrocarbons such as crude oil and natural gas. This type of tool is alternately referred to as a rock bit, or simply a bit.