TuffTRAC wireline tractor

Short, modular system with reverse tractoring and traction control

The simple, robust TuffTRAC™ wireline tractor is the shortest tractor available and the only tractor with reverse tractoring and traction control capability in highly deviated wells. With low sensitivity to borehole conditions, the TuffTRAC tractor can deploy any of our cased hole services, including perforating, production logging, cement and corrosion evaluation, ReSOLVE™ instrumented wireline intervention service, plug setting, and ABC™ analysis behind casing services. It combines with a telemetry cartridge to provide logging while tractoring with precise speed control.

• Production logging
• Cement and corrosion evaluation
• Perforating and plug setting
• ReSOLVE service
  • Nonexplosive plug setting
  • High-force axial shifting
  • Selective shifting with a universal shifting tool
  • Milling
• ABC service

• Reduces fishing risk with reverse tractoring capability
• Reduces slippage via active traction control
• Conveys tools in complex wellbores at lower cost than coiled tubing or drillpipe
• Enables efficient rig-up and rig-down
• Acquires data faster during multiple logging passes
• Operates continuously (no cooldown stops required)
• Operates on any wireline cable
• Uses less power than conventional systems
• Low sensitivity to wellbore conditions

• Shortest length available for greater accessibility
• Reverse tractoring and active traction control
• Modular design with up to eight drive sections
• Logging while tractoring capability
• Simple and robust design
• Built-in critical systems for perforations

Low power, high speed

The modular TuffTRAC tractor design has low power requirements but can achieve a maximum speed of 3,200 ft/h and is compatible with all multiconductor wireline cables. At low power, it can also be run on monocable while tractoring logging passes at up to 2,400 ft/h.

Modular operational flexibility

Despite its compact length, the TuffTRAC tractor has multiple built-in systems for electrical release, head tension, shock absorption, casing collar log, and addressable tractor perforating safety switch. The result is increased operational safety, reliability, and versatility. TuffTRAC tractor configurations typically employ two to four drive sections. Adding a tandem sub enables independent surface control of the drives above the sub from those below. Up to eight drive sections can be run to push heavy loads in difficult completions. The TuffTRAC tractor can accommodate up to six drive sections.

Powered for maneuverability

The electromechanically driven TuffTRAC tractor wheels optimize available surface power, achieving more than 45% conversion efficiency from the supplied electrical power. The low power requirements do not stress auxiliary systems nor does the tractor need stopping to cool down, even in dry gas wells. Exclusive to TuffTRAC tractor operations, active traction control continuously controls the radial force applied by the tractor arms. If slippage is detected, the radial force can be raised to increase the traction and then decreased once the difficult section is successfully traversed. Because the radial force applied by the arms is independent of borehole size, the TuffTRAC tractor drives can achieve the same tractoring force in borehole IDs from 3.4 to 10.6 in [8.6 to 26.9 cm].