|
CN111472694A
|
|
Belt pressing type rotary butt joint device
|
|
CN111456660A
|
|
Balanced type full-bore high-pressure control valve
|
|
CN111136607A
|
|
Emergency tool for operation under pressure
|
|
CN110259394A
|
|
Mutual-inserting type variable diameter carries anti-lost pipe clamping device
|
|
CN110295866A
|
|
Two-way monoblock type lift
|
|
CN110107774A
|
|
Dock aligning assembly
|
|
CN108489722A
|
|
The multi-functional load test device of preventer
|
|
CN108194054A
|
|
Well head environmental-protection gas cylinder
|
|
CN107237903A
|
|
Many control flow dividers with pressure
|
|
CN106837212A
|
|
All-hydraulic intelligent comb transfer device
|
|
CN106499866A
|
|
Safe pressure relief device
|
|
CN106706435A
|
|
Full-hydraulic multifunctional pressure testing device
|
|
CN105299063A
|
|
Endurance alloy combination bearing of screw rod drill
|
|
CN105298428A
|
|
Single-screw self-shearing high temperature well sealer
|
|
CN105003682A
|
|
Pressure-regulating self-opened plug valve
|
|
CN104989682A
|
|
Portable pressurization control device
|
|
CN104278972A
|
|
Simple wellhead adjusting device
|
|
CN104279354A
|
|
Four-way adjusting control valve
|
|
CN103953295A
|
|
PDM (Positive Displacement Motor) drill drive shaft locking device
|
|
CN103953293A
|
|
Shock-absorption fluid director of screw drill
|
