CN111607368A
|
|
High-strength nano water shutoff agent and preparation method thereof
|
CN111594103A
|
|
Self-adjusting flow control water sand prevention system for oil well
|
CN111236886A
|
|
Floating type rotary sliding sand prevention wellhead device and method
|
CN111075388A
|
|
Midway setting prevention hydraulic release packer and method
|
CN110847846A
|
|
Well washing protection integrated packer and method
|
CN110195577A
|
|
A kind of Intelligent sieve tube and the segmentation sand control completion tubing string for being equipped with the Intelligent sieve tube
|
CN110185414A
|
|
A kind of solvable bridge plug of outer expanding
|
CN109441399A
|
|
One kind can sand washing bridge plug
|
CN109322640A
|
|
A kind of hydraulic packing linker
|
CN108869179A
|
|
A kind of electric vehicle wind power generation apparatus and the electric car for being equipped with the device
|
CN107893644A
|
|
A kind of underground hydraulic pressure control device
|