CN110107234A
|
|
A kind of well drilling rig
|
CN108728718A
|
|
A kind of drill bit suitable for soft or hard staggeredly stratum
|
CN108754273A
|
|
A kind of preparation method of Anti-erosion PDC matrix drill bits
|
CN108754492A
|
|
A kind of PDC steel body bits surface enhanced method
|
CN108795110A
|
|
A kind of coating of enhancing drill bit wear resistance
|
CN108913315A
|
|
A kind of antifouling lubricating oil of drilling machinery
|
CN108912869A
|
|
A kind of preparation method of the anti-mud drum coating of PDC drill bit
|
CN108707890A
|
|
A kind of trepan steel accessory surface blackening process method
|
CN108745839A
|
|
A kind of processing method for promoting trepan and unloading linkage part service life
|
CN108822685A
|
|
A kind of vehicle mounted electric hydraulic vibration-type drilling well machine base anticorrosive paint
|
CN108677138A
|
|
A kind of method of spiral rotary head surface salt bath vanadizing
|
CN107269224A
|
|
A kind of anti-backwater drill bit device
|
CN104329036A
|
|
Vehicle-mounted electric hydraulic vibrating-type well drilling machine drilling rod unloading mechanism
|
CN103382809A
|
|
Vehicle-mounted electric hydraulic vibratory well drilling machine
|
CN102678054A
|
|
Spirally bottom-expanding integrated drill bit
|