The World's Most Powerful Coiled Tubing Conveyance Tool
With Up to 20,000 lbs of Pulling Force, No Target is Out of Reach
Wellbore Clean Out • Acidizing • Logging • N2 Lift • Milling • Perforating
WWT International Coiled Tubing Services developed WWT Coiled Tubing Tractors™ (CT Tractors) to help operators overcome the problem of CT lockup in complex, extended reach wells. Our patented, all-hydraulic Tractors enable you to deploy equipment further and faster to cost-effectively reach your target depth, while performing various operations in a wide range of cased or open-hole wellbore sizes.
The WWT CT Tractor has the greatest pulling power of any tractor on the market. Our record-breaking performances back this up. To view operational ranges of WWT CT Tractors Click to open Tractor Specifications
Designed for Ultimate Flexibility
Several innovations make the WWT CT Tractor the most versatile, powerful Tractor available:
- Special patented positive grippers enable them to deploy heavy tool strings to the outer zones of extended reach wells. Debris-tolerant designs provides continuous traction in a wide range of cased or open-hole wellbores.
- Gripper assembly designs incorporate multiple failsafe systems ensuring tool retrieval.
- Exclusive thru-bore design offers ball-drop or e-line pass through flexibility for tools positioned below the Tractor.
- All-hydraulic operation and controls (no e-line required) so they deliver increased reliability during extended in-well service.
- Tough non-magnetic, acid-resistant Inconel®/beryllium copper construction can withstand harsh downhole environments.
- Compatible with almost all intervention fluids.
Do more than just shake
- Delivers true pull force to the end of a CT string.
- Prevents damage to other BHA components including sensitive production logging tools.
Quit spinning your wheels
- Gripper assemblies positively anchor to both cased and openhole wellbores to deliver 100% of available pull force.
- Operates in high debris environments, soft and hard formations.
How It Works
The Tractor consists of gripper and piston assemblies. A control unit diverts fluid to each assembly in a synchronized manner. Operation is simple and uses procedures and controls that are familiar to a CT operator. To start the Tractor, the operator increases fluid flow until the differential pressure at the Tractor exceeds a predetermined set point.
Pressurized fluid is distributed to the gripper, which causes it to expand and engage the wellbore. A piston is activated and drives the Tractor forward, pulling the coiled tubing and pushing the downhole equipment ahead of it. At end of stroke, the gripper disengages and the piston resets. This sequence is repeated over and over. The resulting motion is similar to that of an inchworm, providing forward movement without damaging the casing or formation. The Tractor will travel at the maximum speed with the maximum pulling force possible for the available differential pressure. The rate of advancement down the wellbore is controlled by the rate of feed from the coiled tubing injector.
Tractor operation can be interrupted at any time by reducing fluid pressure below the Tractor’s operating set point. The Tractor can be combined with various subs to enable compatibility with other pressure activated tools.