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CA2037553A1
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Working member of a helical downhole motor for drilling wells
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RU1790637C
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Anode for chrome plating in through-type electrolyte
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RU1776776C
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Axial load indicator
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RU1784050C
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Anode for plants for electrolytic application of coats on long-measured articles
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EP0457925A1
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Working organ of helical-type down-hole drive for hole drilling
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RU1781404C
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Flexible sub
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SU1677396A1
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Flexible clutch
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SU1665018A1
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Sludge trap
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SU1682156A1
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Apparatus for screwing and unscrewing threaded connections
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EP0431162A1
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By-pass valve for boring column
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SU1640487A1
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Sine ball reduction gear
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SU1694853A1
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Preventer
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SU1640354A1
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Device for filtering of drilling fluid
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SU1629468A1
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Core holder
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SU1656112A1
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Bench for testing drilling tool under high pressure
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SU1751493A1
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Thrust roller bearing
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SU1661394A1
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Lateral core sampler
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SU1668626A1
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Drill pipe spinner
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SU1560642A1
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Anode for units of electroplating long articles
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SU1539001A1
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Hydraulic arrangement for extracting shaft from housing
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