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2. List of components of oil drilling rigs - Wikipedia

   en.wikipedia.org/wiki/List_of_components_of_oil...

   Drill bit (#26) is a device attached to the end of the drill string that breaks apart the rock being drilled. It contains jets through which the drilling fluid exits. Drill floor (#21) is the area on the rig where the tools are located to make the connections of the drill pipe, bottom hole assembly, tools and bit. It is considered the main area ...

3. Trepanning - Wikipedia

   en.wikipedia.org/wiki/Trepanning

   Additionally, the specially designed drills come with a safety feature that prevents the drill from penetrating into the brain tissue (through the dura mater). Along with antisepsis and prophylaxis of infection, modern neurosurgery is a common procedure for many reasons other than head trauma.

4. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   The brad point drill bit (also known as lip and spur drill bit, and dowel drill bit) is a variation of the twist drill bit which is optimized for drilling in wood. Conventional twist drill bits tend to wander when presented to a flat workpiece. For metalwork, this is countered by drilling a pilot hole with a spotting drill bit.

5. Deep hole drilling - Wikipedia

   en.wikipedia.org/wiki/Deep_hole_drilling

   The drill head is usually made of carbides of the ISO cutting application group K 10 to K 20 and is coated if required. In special applications, PCD, cermets, ceramics or high-speed steels are also used. [1] The choice of the drill head geometry is made depending on the existing machining situation.

6. Drilling rig - Wikipedia

   en.wikipedia.org/wiki/Drilling_rig

   A drill bucket, or auger bucket, is a drilling head that accumulates spoil inside and can be lifted from the hole periodically to be emptied. [ 12 ] This method is particularly effective for drilling through hard and compacted soils, as well as rocks, due to the bucket's cylindrical design with cutting teeth at the base, which excavates and ...

7. Drill - Wikipedia

   en.wikipedia.org/wiki/Drill

   A geared head drill press, with up to eight possible speeds accessible via shift levers on the head and a two speed motor control immediately in front of the quill handle. A geared head drill press transmits power from the motor to the spindle through spur gearing inside the machine's head, eliminating a flexible drive belt. This assures a ...