| 摘要 |
FIELD: oil and gas production. ^ SUBSTANCE: device consists of at least one edge for pipe cutting and single projection with tooth and base wider, than tooth. Also the tooth and base are coupled by means of cutting surfaces. The disclosed here design of the device for pipe cutting facilitates less applied forces, in its turn facilitating cutting comparatively big pipes, such as casings, heavy-weight drill pipes and a drill pipe lock. ^ EFFECT: improvement of device. ^ 27 cl, 48 dwg |
