CTDirect Coiled tubing directional drilling system
The CTDirect* coiled tubing directional drilling system maximizes production in short-radius directional drilling applications. Specifically designed to access additional reserves in thru-tubing reentry drilling applications, the CTDirect system maximizes reservoir contact without the cost of removing existing completions or production tubing—all while producing the reservoir and minimizing formation damage.
Applications
1.Vertical, horizontal, and directional wells
2.Reentry drilling
3.Underbalanced and overbalanced drilling
4.Thru-tubing drilling
Benefits
1.Maximizes reservoir contact
2.Improves production potential in reentry wells
3.Increases ROP in underbalanced applications
4.Eliminates cost of removing completions
5.Avoids risk of taking well offline during reentry drilling
6.Enables better geosteering with full 3D directional capability
Features
1.40°/100-ft [40°/30-m] dogleg capability
2.Continuously variable toolface orienter
3.Natural gamma ray sensor
4.Annular and internal pressure measurements
5.Downhole drilling mechanics
6.Shock and vibration measurements
7.Real-time data transmission every 3 seconds
8.Telemetry and downhole power from wireline heptacable
9.Memory array resistivity compensation
Advantage
Enhance production from existing wells。The CTDirect system is designed to access bypassed reserves and extend production in underbalanced, short-radius, and thru-tubing reentry drilling applications. The system features a 410° continuously variable toolface orienter with real-time bidirectional data communication capabilities.
Minimize reservoir damage while drilling。When operating in underbalanced or managed pressure drilling operations, the CTDirect system minimizes the risk of reservoir damage while keeping the well live. Compared with overbalanced conventional drilling, underbalanced drilling with the CTDirect system typically results in earlier payout and lower well stimulation costs.
Improve accuracy of well placement。The system measures downhole drilling mechanics data, shock and vibration, inclination, azimuth, and toolface orientation. These data are seamlessly transmitted to surface, where they are continuously monitored at the wellsite for precise directional steering and immediate motor stall detection.
Increase production and extend well life。In reentry drilling applications, the CTDirect system has proved to assist in boosting production 300?700% while avoiding lost production and the risk of killing your well. Coiled tubing drilling increases drainage by sidetracking or deepening a well, and the CTDirect system maximizes reservoir contact in short-radius applications with a build rate of up to 40°/100 ft [40°/30 m] and the ability to drill horizontals reaching 4,000 ft [1,219 m].
Improve efficiency and protect production。The system brings greater safety and more efficiency to reentry drilling. Thru-tubing reentry with the CTDirect system enables you to avoid the time- and cost-intensive operation of pulling production tubing, which requires additional surface equipment. In offshore and other hard-toaccess locations, the system’s smaller footprint and rapid rig-up are particularly valuable.
Unlike conventional reentry drilling, in which production may not return at the same rate, the CTDirect system mitigates risks inherent to shutting off production. In fact, the system enables you to continue producing from the existing well while increasing drainage.
Produce while you drill。The CTDirect system confers the inherent benefits of underbalanced drilling—a continuous flow of formation fluids and zero invasion. Using a closed-loop system that maintains bottomhole pressure below that of the formation being drilled, the system generates a pressure differential that induces hydrocarbons into the hole. With hydrocarbons flowing throughout the drilling process, ROI is realized more quickly.
Underbalanced drilling uses lightweight drilling fluid, which eliminates invasion and protects the production potential of the reservoir. Without the damaging side effects of using the heavyweight drilling mud required in conventional overbalanced drilling, the CTDirect system increases production and decreases the costs of drilling fluid and well stimulation.
Case Study
After introducing the CTDirect system, 8,620 ft were successfully drilled in a deep well with high temperatures. In the best run, the BHA drilled 1,400 ft [427 m] in 24 h, exceeding the field’s average TTRD ROP record by 200%.
The CTDirect coiled tubing directional drilling system successfully drilled more than 3,990 ft in a deep tight-gas sandstone reservoir with high temperatures. The operator reached all previously unachievable geological targets for significantly increased gas recovery. Using the CTDirect system, the operator exceeded the average field ROP by 20%.
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