CN112211591A
|
|
Pressure-testing delay toe end valve and method for establishing passage with stratum
|
CN106223870A
|
|
A kind of from dynamic(al) correction centralizer
|
CN106223869A
|
|
A kind of centralizer being suitable for multiple sleeve pipe
|
CN105239961A
|
|
Switch slide sleeve
|
CN104806198A
|
|
Shut-off plug of stage collar for well cementation
|
CN104806196A
|
|
Casing floating system for horizontal well
|
CN104777031A
|
|
Tensile test tool
|
CN104763373A
|
|
Ball throwing type float collar
|
CN104772475A
|
|
Machine tool chuck tip
|
CN104818959A
|
|
Adjustable classification hoop for well cementation casing running
|
CN104818958A
|
|
Automatic grouting type float collar
|