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A kind of tubing and casing Hermetical connecting structure
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A kind of novel seal button oil annular tube structure
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A kind of pipe end failure detector
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A kind of conditioning treatment process solving T/P91, T/P92 mixed grain structure
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A kind of T/P92 steel pipe delta ferrite control method
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The control method of small-bore 12Cr1MoVG steel pipe decarburized layer
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Steel tube spinning lathe and steel tube machining process utilizing spinning lathe
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Large-caliber thick-wall marine seamless steel tube and TMCP (thermomechanical rolling process) production method thereof
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Seamless steel pipe for large-aperture high-strength bridge and TMCP production method thereof
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Large-caliber high-strength seamless steel tube for machinery and TMCP (thermomechanical rolling process) production method thereof
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Oil casing with large caliber and TMCP (Thermal Mechanical Control Processing) production method thereof
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Cooling device of seamless steel pipe puncher roof
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Outlet guiding device of seamless steel pipe rolling mill
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Stopper mechanism for top of seamless steel tube puncher
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Shrinking machine
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Grab machine
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Composite perforating machine
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Three-roller rotary sizing mill
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Perforating and extending integrated machine
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