|
CN111020372A
|
|
Hard alloy
|
|
CN110952015A
|
|
High-strength alloy material
|
|
CN109882668A
|
|
A kind of pipe pressuring connection pipe end Quick Connect Kit
|
|
CN108625797A
|
|
A kind of hermetic sealing drill pipe joint preventing reversion shackle
|
|
CN106151681A
|
|
Self-propelled pipeline construction Quick Connect Kit
|
|
CN104651750A
|
|
High-strength petroleum drill pipe body and heat treatment process thereof
|
|
CN104390096A
|
|
Trolley for receiving and dispatching oil and gas pipeline detection equipment
|
|
CN104531958A
|
|
A screw thread surface laser processing method
|
|
CN104097086A
|
|
Fixture for use in machining of plate-like or arc tensile specimen by milling machine
|
|
CN104018788A
|
|
Drill rod joint with thread profiles
|
|
CN105014298A
|
|
Method for constructing and connecting anticorrosive gas and liquid delivery steel pipes
|
|
CN103924932A
|
|
Drill rod capable of reducing friction and pressure and removing rock debris
|
|
CN103868811A
|
|
Hydrogen sulfide concentration control device for sulfide stress corrosion uniaxial tensile test
|
|
CN104100212A
|
|
Anti-collapsing and anti-striking protection drilling rod
|
|
CN102409986A
|
|
Self-balancing iron driller
|
|
CN101881140A
|
|
High-performance tool joint for transmitting electric power and relevant signals
|
|
CN102213587A
|
|
Measuring instrument for transition zone in thickening pipe
|
|
CN102211100A
|
|
Thickened pipe end outer surface descaling device
|
