|
CN111140201A
|
|
Special paraffin removal mill shoe for horizontal well screw drilling tool
|
|
CN109931012A
|
|
Quick-release quick change oil pumping rod centering device
|
|
CN109931011A
|
|
The anti-wear-resisting paraffin removal sucker rod special centralizer of sulphur
|
|
CN109989721A
|
|
Antisitic defect internal surface of sleeve pipe hydraulic anchor
|
|
CN110005336A
|
|
A kind of coal bed gas Special wear-resistant efficient screw drill tool and processing technology
|
|
CN110107222A
|
|
A kind of high sulfur crude gas well special anti-corrosion degumming preventing helicoid hydraulic motor and processing technology
|
|
CN110105674A
|
|
A kind of high-performance anticorrosion Special packer processing technology
|
|
CN110103392A
|
|
A kind of Holes of Complicated Wells special anti-corrosion abrasion-proof sucker rod centralizer processing technology
|
|
CN107191151A
|
|
Quick centring righting apparatus for work
|
|
CN107100576A
|
|
The quick unfreezing apparatus for work of novel multi-use
|
|
CN106555561A
|
|
Multifunction drilling tool release device
|
|
CN106522894A
|
|
Multifunctional integrated operation device specially used for coalbed methane
|
|
CN104018791A
|
|
Process for machining anti-degumming anti-corrosion heat-proof positive displacement motor drill
|
|
CN103821796A
|
|
Quick connecting-quick releasing multipurpose drilling tool motor tester
|
|
CN103821463A
|
|
Milling and descaling multi-purpose drilling tool
|
|
CN102704885A
|
|
Multipurpose well shutting device
|
|
CN102409995A
|
|
Corrosion-resistant, sulfate-resistant and wear-resistant ram blowout preventer
|
|
CN102409982A
|
|
Brake anti-blocking screw drilling tool
|
