Drill bit
a drill bit and drill bit technology, applied in drilling pipes, other chemical processes, manufacturing tools, etc., can solve the problems of many hours of round trip time to pull out a drill bit and replace it with another one, and the form of the drill bit is the limiting factor in many traditional techniques known in the art, and the cost of oil exploration particularly in offshore regions is extremely high
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[0050]A drill bit 1 in accordance with an aspect of the present invention will now be described with reference to FIGS. 1 to 3. The drill bit 1 is shown mounted to one end of a cylindrical body 2 via a first thread end connection 3 suitable for mating with the body 2. The opposite end of the cylindrical body 2 is then mounted on the lower end of a casing string (not shown) via a second thread end connection 4 suitable for mating with the casing.
[0051]The drill bit 1 itself comprises five cutting members 5 (often referred to as blades) located at the opposite end of the drill bit 1 to the first thread end connection 3, namely at the end where a crown 6 is located. It will be appreciated that the number of cutting members 5 may be varied, as deemed appropriate for the drilling operation. The cutting members 5 extend out from the crown 6 and each cutting member 5 can be seen to comprise a plurality of preformed cutters 7 located within corresponding recesses along a “leading edge” of t...
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