Beijing
China
4
2022-06-23
Aimin Chen from Beijing, CN has applied for patents for these inventions. The list has both pending applications and granted patents:
Sealing assembly for dissolvable bridge plug, a dissolvable bridge plug and a sealing method for gap
#2 | 2021-05-13Switch sliding sleeve device for oil-gas exploitation and switching method thereof, oil-gas exploitation tool and switching method of wall through hole thereof
#3 | 2018-10-25Central shaft for bridge plug, bridge plug and setting method for the same
#4 | 2018-04-05Reducing support ring for bridge plug and bridge plug
2157332 ⎘