The first downhole motor
The first downhole motor wasn't actually a PDM with rubber and metal as we have seen today.
During my own research on drilling history I found that the first downhole motor is not actually a motor. I was a single stage turbine, all metal.
Let me share what I've found with you.
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https://raka.is/r/qqO95
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The first filed patent of a downhole turbodrill motor (or, downhole drilling motor) mud-powered and single-stage impulse dates back to 1873 by C.G. Cross in the United States.
The mud passes through the nozzles at a high velocity, impacting the stator blades and rotating the outer housing and the bit. Axial-flow multistage turbine is the working tool in which the energy is converted in drive force to impose rotary motion just to the drilling tool at the bottom hole instead of moving the entire column of rods in the well.
Unfortunately, the engineering efforts poured in this system did not find correspondence with the advancement of the contemporary science of materials and high-pressure pumping technology. Erosion problems with the nozzles and stator resulted because of the high fluid flow velocity; furthermore, the power output of the single-stage turbo drill was low, and the bits were not aggressive enough with harder rocks strata.
... amazing. isn't it?
พ่อน้องเฟิร์นและน้องภัทร
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Shopee
raka.is/r/gP7GV
Lazada
raka.is/r/qlzXR
