| 摘要 |
The invention relates to devices for drilling oil and gas production wells. The aim of said invention is to increase the well drilling efficiency, to reduce the device metal consumption, to increase the service life of a working member and to reduce the energy consumption of a cutting process. The inventive device for drilling oil and gas wells comprises a flexible endless working memeber which is movably mounted on the annular groove of a drive roller. Said drive roller is cinematically connected to the main drive of the device which carries out a reciprocating motion and is vertically movable along guides by means of a drill feed drive. The branches of the flexible endless working memeber are movably mounted on the annular grooves of positioning and brake rollers. A suspended open loop, in which a driven roller is arranged, is formed on the side diametrically opposite to the drive roller of the branche of flexible endless working memeber. |
