E21B31/1075 - CPC Classification Index

ClassID:

135448 ⎘

E21B31/1075 - CPC Classification

Classification description:

Fishing for or freeing objects in boreholes or wells using impact means for releasing stuck parts, e.g. jars using explosives

Downhole impact apparatus

Downhole disconnect tool

Downhole tools having controlled degradation and method

Downhole tools having controlled degradation and method

Downhole impact apparatus

String shot back-off tool with pressure-balanced explosives

Propellant back off tool

BACKOFF SUB AND METHOD FOR REMOTELY BACKING OFF A TARGET JOINT

Backoff sub and method for remotely backing off a target joint