downhole drill

downhole drill

[′dau̇n‚hōl ′dril]
(mining engineering)
A hammer or percussive drill in which a reciprocating pneumatic piston is located immediately behind the drill bit and can follow and enter the bit down the hole, for minimizing energy losses.
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References in periodicals archive ?
CAD Systems has unveiled a downhole drill bit that was designed in SOLIDWORKS, programmed (G-code) with Mastercam, machined on a 5-axis Haas CNC Machine Tool, and also direct metal printed on a 3D Systems DMP 3D printer.
Halliburton has released the RezConnect Well Testing System, a complete well testing solution for wireless control of downhole drill stem test tools (DST), measurement and analysis of well-test data in real time.
A second key technology, which matured in the 1970s, is the downhole drill motor.
And as work progressed, soil conditions posed problems when downhole drill fluid returns were not sustainable.
Therefore, by incorporating one or more devices capable of absorbing low-frequency acoustic energy into a drillstring, the amount of downhole drill bit noise entering the drillstring channel will be reduced.
A successful operation to retrieve downhole drill string, tools, or pipe product can save a contractor from costly failure of a directional drilling project.