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AP1081A
(en)
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Closed loop control system for diamond core drilling.
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US2348047A
(en)
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Mud turbine and method of assembling the same
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AP1950A
(en)
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A method and device for expanding a body under overpressure
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US1482702A
(en)
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Fluid-operated well-drilling apparatus
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AP1987A
(en)
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Method for intensification of high-viscosity oil production and apparatus for its implementation
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US2497041A
(en)
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Nozzle ring for gas turbines
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AU2014259159B2
(en)
|
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Improved turbine
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AP1733A
(en)
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Oil and gas production with downhole separation and reinjection of gas.
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US2353534A
(en)
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Oil well drilling unit |
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AP2004002978A0
(en)
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Annulus monitoring system
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US2432185A
(en)
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Method of making turbine wheels
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US3159222A
(en)
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Turbodrill
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US2348046A
(en)
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Ball thrust bearing for well drilling units
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US2354587A
(en)
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Method of manufacturing turbine blades
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US1993963A
(en)
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Supercharger
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US2908534A
(en)
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Bearing assembly for the shaft of underground hydraulic turbines for driving drill bits in deep-well drilling
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GB368957A
(en)
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Improvements in or relating to rotary earth boring tools
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US2990894A
(en)
|
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Turbodrill
|
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US1770488A
(en)
|
|
Deep-boring apparatus
|
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US2588311A
(en)
|
|
Oil well drilling apparatus
|
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US2984309A
(en)
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Turbodrill
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US2410810A
(en)
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Diaphragm construction for turbines
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US2893688A
(en)
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Fluid power motor valve
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US460369A
(en)
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canan |
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US871341A
(en)
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Centrifugal and turbine pump and the like.
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