| 摘要 |
The present disclosure describes implementations of a well tractor. In an example implementation, a well tractor includes a housing; a roller coupled to the housing; an electric motor coupled to the roller; and a variable ratio transmission coupled between the motor and the roller, the variable ratio transmission operable to drive the roller. 134 132 128 136 TRANSCEIVER UNINTERRUPTABLE - 126 POWER SUPPLY 104 130 SPL |
