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2. Hole saw - Wikipedia

   en.wikipedia.org/wiki/Hole_saw

   A 115 mm (4.5 in) diamond hole saw. A hole saw (also styled holesaw ), also known as a hole cutter, [1] is a saw blade of annular (ring) shape, whose annular kerf creates a hole in the workpiece without having to cut up the core material. It is used in a drill. Hole saws typically have a pilot drill bit (arbor) at their center to keep the saw ...

3. Directional drilling - Wikipedia

   en.wikipedia.org/wiki/Directional_drilling

   Directional drilling (or slant drilling) is the practice of drilling non-vertical bores. It can be broken down into four main groups: oilfield directional drilling, utility installation directional drilling, directional boring (horizontal directional drilling - HDD), and surface in seam (SIS), which horizontally intersects a vertical bore ...

4. Milling (machining) - Wikipedia

   en.wikipedia.org/wiki/Milling_(machining)

   A 3-axis clone of a Bridgeport -style vertical milling machine. Milling is the process of machining using rotary cutters to remove material [ 1] by advancing a cutter into a workpiece. This may be done by varying directions [ 2] on one or several axes, cutter head speed, and pressure. [ 3] Milling covers a wide variety of different operations ...

5. Inclinometer - Wikipedia

   en.wikipedia.org/wiki/Inclinometer

   An inclinometer or clinometer is an instrument used for measuring angles of slope, elevation, or depression of an object with respect to gravity 's direction. It is also known as a tilt indicator, tilt sensor, tilt meter, slope alert, slope gauge, gradient meter, gradiometer, level gauge, level meter, declinometer, and pitch & roll indicator.

6. Measurement while drilling - Wikipedia

   en.wikipedia.org/wiki/Measurement_while_drilling

   Measurement while drilling (MWD) Nuclear magnetic resonance (NMR) v. t. e. A drilling rig is used to create a borehole or well (also called a wellbore) in the earth's sub-surface, for example in order to extract natural resources such as gas or oil. During such drilling, data is acquired from the drilling rig sensors for a range of purposes ...

7. Drilling - Wikipedia

   en.wikipedia.org/wiki/Drilling

   Drilling. Drilling is a cutting process where a drill bit is spun to cut a hole of circular cross-section in solid materials. The drill bit is usually a rotary cutting tool, often multi-point. The bit is pressed against the work-piece and rotated at rates from hundreds to thousands of revolutions per minute. This forces the cutting edge against ...