Dowhole tractor comprising a hydraulic supply line for actuating hydraulic components

Downhole tractor comprising at least one hydraulic supply line for actuating hydraulic components, the downhole tractor comprising a plurality of tractor arms and a plurality of tractor wheels, the downhole tractor further comprising:

• the at least one hydraulic supply line having a first supply section and a second supply section;
• a hydraulic power pack including a motor, at least one hydraulic pump, and a manifold block, the power pack being coupled to the at least one hydraulic supply line;
• at least one first drive section coupled to the first supply section of the hydraulic supply line having at least one hydraulic component and at least one second drive section coupled to the second supply section of the hydraulic supply line having one further hydraulic component, wherein said hydraulic components are coupled to the at least one hydraulic supply line in parallel and configured for being actuated by the at least one hydraulic supply line;
• a hydraulic switch module being located between the at least one first drive section and the at least one second drive section, the hydraulic switch module including a valve control unit and a controllable valve located in the hydraulic supply line between the first and second supply sections of the at least one hydraulic supply line, and the controllable valve being selectively activated to couple the at least one second drive section to the at least one first drive section of the hydraulic supply line or to decouple the at least one second drive section from the at least one first drive section of the hydraulic supply line for allowing the downhole tractor to have a first operational mode wherein only the first section is driven and a second operational mode wherein both the first section and the second section is driven.