|
CN106425644A
|
|
Full-automatic sawing machine control auxiliary machine for longitudinal pipe sawing
|
|
CN103789685A
|
|
High-strength high-toughness petroleum drill pipe and production method thereof
|
|
CN103789649A
|
|
Carbon-dioxide-corrosion-resistant oil drill pipe and production method thereof
|
|
CN103452492A
|
|
Forming method of drill pipe high station structure for rapid raising and dropping drill and drill pipe
|
|
CN103498033A
|
|
Thermal treatment process for improving mechanical property of quenched and tempered steel
|
|
CN103470191A
|
|
Drill rod structure with high-station structure, and manufacturing method
|
|
CN103495839A
|
|
Machining method of quick-trip drill pipe high-position structure formed in built-up welding mode
|
|
CN103481038A
|
|
Machining method for high-station structure of drill rod
|
|
CN103286151A
|
|
Preparation device and method for manufacturing inside and/or outside thickened aluminum alloy pipes with variable cross sections
|
|
CN102676944A
|
|
Nonmagnetic steel for drilling tool and its preparation method
|
|
CN102172758A
|
|
Vertical-die-separation, horizontal-clamping, multi-die cavity forming horizontal drilling rod thickening hydraulic press
|
|
CN102172817A
|
|
Method for machining ultrahigh thickening ratio controlled forming pipe and joint directly forging type drill rod
|
|
CN102019303A
|
|
Device and method for preparing aluminum alloy drill rod tube body
|
|
CN101988371A
|
|
Intelligent drilling rod for petroleum and natural gas extraction and manufacture method thereof
|
|
CN101988147A
|
|
Treatment method for welding zone of high-performance sulfur-resisting drill pipe body and joint
|
|
CN101988879A
|
|
Loading detection method for sulphide stress corrosion uniaxial tensile test and monitoring system thereof
|
|
CN101987329A
|
|
Double-pass control molding and thickening method for oil gas exploitation drill rod
|
