|
CN109869452A
|
|
Ginseng technique drops in tower-shaped driving wheel pumping unit
|
|
CN109630057A
|
|
Swing type eccentric abrasion prevention wellhead sealing device
|
|
CN108979599A
|
|
A kind of slot pipe
|
|
CN108843268A
|
|
Replaceable polished rod packing kit for thermal recovery
|
|
CN108775231A
|
|
Replaceable polish rod anti-blowout packing box
|
|
CN109184582A
|
|
The replaceable assembly of split type polished rod, polished rod and polished rod Replacement procedure
|
|
CN109162650A
|
|
A kind of oil tool and its metering method with automatic identification label
|
|
CN109026664A
|
|
A kind of oil well pump track fixed valve
|
|
CN108119354A
|
|
Glue injection type plunger pump gland packing box
|
|
CN108167569A
|
|
Piston type energy-storage buffering device
|
|
CN108252674A
|
|
Left seal, right seal, split seal assembly and polish rod seal device
|
|
CN107664027A
|
|
Note takes out two passage extracting device of oil and application method
|
|
CN107583442A
|
|
The automatic hydrogen sulphide removing device of petroleum tank
|
|
CN109322636A
|
|
A kind of oil field shaft mouth blowout hookup
|
|
CN106742891A
|
|
Tank mouth catches oily collection device
|
|
CN106639958A
|
|
Pithead steam injection anti-leakage sealing device
|
|
CN108252678A
|
|
A kind of down-hole plugging device of uncoupling plunger tubing pump snubbing serving
|
|
CN108252902A
|
|
The process of improved tubing pump and motionless tubing string maintenance pump
|
|
CN106401581A
|
|
Closure sampling device
|
|
CN105952410A
|
|
Underground blockage device of casing pressure balanced working method
|
