Schlumberger

UltraTRAC All-Terrain Wireline Tractor

High-force extended-reach tractor conveyance for both open- and cased hole wireline operations

Employing the highest tractor force available in the industry, the UltraTRAC all-terrain wireline tractor readily conveys large payloads in challenging borehole conditions and across high-angle, extended-reach wells. By replacing conventional reliance on coiled tubing and drillpipe carrier conveyance in both open and cased holes, the UltraTRAC tractor simplifies and streamlines wireline operations to reduce cost, time, and risk. The UltraTRAC Mono tractor system adds logging-while-tractoring functionality to acquire data in both up and down passes.

Exceptional navigation in challenging well terrains

The robust maneuverability of the UltraTRAC all-terrain tractor results from three exclusive design features:

  • Traction control enables real-time adjustment of the radial force applied by the tractor arms. If slippage is detected, the amount of radial force can be increased to increase the traction. Once the difficult interval is successfully traversed, radial force is decreased to avoid unnecessary wear of wheels and drive components and conserve energy.
  • Dynamic suspension maintains the constant radial force applied by the arms to the well walls, independent of borehole size. The drives employed by the UltraTRAC tractor achieve the same tractoring force in well IDs from 3.6 to 15 in.
  • Bidirectional capability decreases operational risk by retrieving the tractor in case of stickiness, abnormally high friction, or borehole collapse. In reverse tractoring mode, the full tractor force of the UltraTRAC tractor complements the cable head tension to retrieve downhole equipment and effectively prevent having to resort to fishing operations.

Modular deployment versatility for environment-specific access

Engineered to withstand the impact of perforating gun detonation as well as the vibration generated in rugose boreholes, the modular UltraTRAC all-terrain tractor has low sensitivity to well conditions. Because the fully integrated system incorporates multiple peripheral systems into the tractor architecture, only a single crew is necessary for both tractor operation and the conveyed services. The UltraTRAC tractor does not requires specialized cable and is compatible with all multiconductor cables.

Optimal tractor performance across all terrains is realized by specifying the number and configuration of the drive sections. A tandem sub increases functionality by enabling independent surface control of the drives above and below the sub. Multiple wheel diameters and proprietary designs are available for the well geometry and expected borehole conditions.

Related services and products

 
 
Technical challenges
 
Request More Information

Quality Walkabove VSP Survey Meets Reservoir Geophysics Objectives

VSP Image Below Well Inserted on Surface Seismic Image.
Wireline tractor conveys seismic imagers to record a walkabove VSP survey that accounts for the geometry of a deviated deepwater well.
Read case study

Reliable Conveyance Through Washouts and Restrictions

The UltraTRAC all-terrain tractor animation.
PrevNextZoom1 of 1