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2. Drill pipe - Wikipedia

   en.wikipedia.org/wiki/Drill_pipe

   Drill pipe steel is commonly quenched and tempered to achieve high yield strengths (135 ksi is a common tube yield strength). The tool joints (connectors) are also received by the manufacturer as green tubes.

3. Roller cone bit - Wikipedia

   en.wikipedia.org/wiki/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. [2]

4. Coiled tubing - Wikipedia

   en.wikipedia.org/wiki/Coiled_tubing

   Drilling which is powered by a mud motor instead of a rotating pipe is generally called slide drilling. [1] Typically the mud motor will be one component of a Coiled Tubing Drilling bottom hole assembly. The BHA also provides directional survey, gamma, pressure, temperature, and in some cases, petrophysical logs as drilling progresses.

5. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   While the above is a common use of center drill bits, it is a technically incorrect practice and should not be considered for production use. The correct tool to start a traditionally drilled hole (a hole drilled by a high-speed steel (HSS) twist drill bit) is a spotting drill bit (or a spot drill bit, as they are referenced in the U.S.). The ...

6. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. 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.

7. List of drill and tap sizes - Wikipedia

   en.wikipedia.org/wiki/List_of_drill_and_tap_sizes

   Below is a comprehensive drill and tap size chart for all drills and taps, imperial and metric, up to 36.5 millimetres (1.44 in) in diameter. In manufactured parts, holes with female screw threads are often needed; they accept male screws to facilitate the building and fastening of a finished assembly.