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RU1788077C
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Method of processing metals and alloys
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Method of connecting pipes of aluminum alloys mainly of oil assortment
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SU1764923A1
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Methods of making sealed drill collars for thermal well boring
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Method of making steel drill pipes of enhanced wear resistance and leakproofness
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Method for making pins for repairs of vertical reservoirs filled with product
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Method of manufacturing tubing joints with stabilizer collar
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Method for production of steel rivets
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Device for diamond burnishing of holes in parts
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Method of manufacturing pipes with internal enamel coating
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RU1795322C
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Sealing device for pipe pressure testing
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SU1736634A1
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Device for cleaning external and internal surfaces of pipes
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SU1740611A1
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Method for joining kelly joints into section
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RU1791740C
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Method of testing of articles for tightness
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SU1689699A1
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Seal device
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SU1717333A1
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Planimeter for mechanical wrench
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SU1685694A1
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Machine for diamond burnishing of surfaces
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SU1663399A1
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Device for measurement of length of moving tubes
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SU1716085A1
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Releasing spear
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SU1651189A1
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Apparatus for nondestructive tests of elongated members of circular cross section
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SU1716077A1
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Method of coupling oil-field pipes
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