Hydraulic machine with helical rotor - has internal and external helices assembled from separately machined longitudinal sections
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Process and universal downhole motor for driving a tool
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Valve apparatus for deep drilling
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Universal downhole motor for driving a tool
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Slidable carrier or support
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Anchoring devices
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Coring device with controlled releasing
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Device for guiding a drilling tool
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Improvements in or relating to axial flow pumps
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Pump, especially for pumping the drilling fluid in deep drilling, the axial and multi-stage design
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Drill bits
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Device for wedging blade wheels or the like on the shaft of drilling turbines, axial pumps or the like.
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Deep drilling turbine for earth drilling
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Deep drilling turbine with a wear-limiting device
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A method of and apparatus for assembling and dismantling well-drilling turbines
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Method and device for tensioning or releasing stator wheels placed on top of one another in the drilling turbine housing when installing or removing them
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Deep drilling motor, in particular drilling turbine, with axial pressure comb bearings flushed by the circulating fluid
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Drilling turbine
DE1090607B
Coupling device for the axial, easily detachable connection of the shafts of deep drilling motor sections, in particular of drilling turbines
