| 摘要 |
FIELD: oil and gas industry.SUBSTANCE: slot perforator contains a body, a hydraulic cylinder placed in the body, a working unit placed over the working hydraulic cylinder with at least one operating tool and a mechanism transferring efforts from the hydraulic cylinder to the working unit. According to the invention the perforator is equipped with an additional hydraulic cylinder and a mechanism transferring efforts from the hydraulic cylinder to the working unit which are placed in the body below the working unit so that this lower hydraulic cylinder is capable to create additional effort to the working unit directed in the upward opposite direction to the effort generated by the hydraulic cylinder placed above the working unit. The effort generated by the lower hydraulic cylinder is ensured by the action of pressurised liquid coming to it through one or several hydraulic channels made in the perforator body or through a hydraulic system made in the perforator in another way. Invention versions are suggested which include additional working units providing delivery of individual effort to each working unit.EFFECT: improving operational efficiency and reliability of the perforator.19 cl, 7 dwg |
