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FR2031746A5
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Heat-insulating pipe for oil explotation
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GB1246385A
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Thermal insulating tubing
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US3525237A
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Drill-stem
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US3469629A
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Recuperable packer
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FR1531502A
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Piston pump for deep oil drilling
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FR1527188A
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Machine for cutting sheets in the round
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FR1534725A
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Torsionally deformable seal allowing limited angular rotation
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FR1523441A
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Hydraulic device for measuring tension in cables
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FR1522542A
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Device for perforating the probes with a jet of abrasive fluid
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FR1522476A
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Ball puncher for perforating well casings
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US3450203A
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Device for well casing perforation with an abrasive fluid jet
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US3502161A
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Apparatus for perforating well casings
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FR1518885A
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Device for measuring the pressure at the bottom of boreholes
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FR1529633A
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Plant for the production of steam by recovering heat from the secondary reflux of fractionation columns
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FR1517863A
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Installation for the synchronization of continuous flows of fluids to be mixed with unequal flow rates
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FR1519580A
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Process for the preparation of an improved catalyst for purifying petroleum fractions by hydrogenation
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FR1519579A
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Method and apparatus for automatically removing liquids collected in gas separators
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FR1510839A
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Device for starting and adjusting the number of revolutions of slip-ring asynchronous motors
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FR1493606A
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Adsorber for installations intended for the separation of light gasoline using activated carbon
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FR1514954A
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Turbine for drilling oil and gas wells
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