The Newton System

Teledrill’s Newton™ system provides the power and the information to optimize coiled tubing operations.

Coiled Tubing Challenges

Drilling out frac plugs with coiled tubing can be challenging, especially in longer laterals. Vibration or water hammer tools included in the BHA can extend the coiled tubing unit’s reach to the deepest plugs, but well-site operators still encounter slow drilling, motor stalls, debris build-up and coil lock up, which can cause delays and require frequent short trips.

Similarly, while running coiled tubing into horizontal wells to perform annular fracturing or workover operations, an extended reach tool may be needed to reach the toe of the well, but operators may still encounter hang ups or tight spots. Continuous operation of vibration tools in these applications can complicate operations.

In most coiled tubing operations in horizontal wells, operators have no direct measurement of weight on bit, bottomhole pressure, and addressing problems involves trial and error while applying imprecise rules of thumb.  [Figure 1]

Figure 1: During coiled tubing operations in horizontal wells, surface weight indications do not accurately represent downhole conditions.Figure 1: During coiled tubing operations in horizontal wells, surface weight indications do not accurately represent downhole conditions.

Newton System: the Ideal Solution

These problems could be prevented or resolved quickly if operators had real-time downhole measurements of weight-on-bit and other key parameters.  The Newton system provides the ideal solution.  It combines an axial thruster with downhole sensors and mud pulse telemetry that wirelessly transmits real-time data to the surface. [ Figure2]

Figure 2. Newton downhole components

The Newton system’s modular downhole system includes an electronics/mud pulser sub, a sensor sub, and a battery pack. The combined tool is just 10 ft long, has an outside diameter of 2⅞ in, and is fully assembled and tested in Teledrill’s workshop before deployment to the field. Batteries provide 80 hours of continuous operation and system electronics are rated to 175⁰C.  The Newton system is made up in the bottomhole assembly directly above the downhole motor during plug drill-out operations, so measurements are taken as close as possible to the bit, while allowing ball drop-activated tools to be operated in the normal fashion.

Dual-function Pulser

The system’s pulser performs the dual functions of applying force to advance the coil and creating coded pressure pulses to transmit sensor readings to the surface. As the system’s pulser valve closes and opens rapidly, it generates pressure signals and delivers axial thrust at forces up to 2000 lbf to advance the coil. As the pulser valve closes, a high pressure wave propagates up the coil, significantly reducing friction.

Because the Newton system provides thrusting force and reduces friction, the coil advances smoothly down the well bore, transferring more weight to the bit for smooth plug milling. In addition, the system reduces the number of trips and extends the fatigue life of the coil. [Figure 3]

The Only Extended Reach Tool with Downhole Sensors

Only Teledrill’s Newton system provides extended reach capability utilizing both real-time and recorded downhole data measurements.

Teledrill’s Newton system incorporates numerous downhole sensors to continuously record bore pressure, annulus pressure, weight-on-bit, temperature, gravity tool face and inclination. [Figure 4] The downhole tool can be programmed on surface to send measurements from any or all of the sensors at specified intervals to match the well’s objectives. Pulse signals can be reliably transmitted and decoded in coil strings greater than 25,000 ft in length. All data are stored in the tool’s memory for post-well analysis.

When the tool is returned to the surface, the stored data are downloaded and correlated with well depth, providing a basis for analyzing the job and evaluating bit, motor and coiled tubing unit performance. This enables completion engineers to optimize vendor selection and improve plug milling operations on subsequent wells.

Using Downhole Data

The Newton system rigs up quickly, with a single surface pressure transducer, and can be operated by the coiled tubing operator after minimal training. No dedicated Teledrill field engineer is required on location once the job is under way.

The system’s compact surface computer, easily mounted in the coiled tubing unit, decodes mud pulse telemetry signals and presents data to the coiled tubing operator in user-friendly, graphical format. [Figure 3]

Figure 3. The compact Teledrill surface system is easily mounted in the coiled tubing unit.

With reliable real-time measurements of downhole parameters, coiled tubing operators can make informed decisions to avoid problems, optimize drill out performance, and maximize hole cleaning.

Real-time measurements of weight-on-bit and pressure enable operators to time-drill plugs and generate smaller cuttings that are easier to circulate out of the hole.

Coiled_tubing_drill_outFigure 4. Downhole Weight Measurement Enables time-drilling of plugs with coiled tubing

Engineered Approach Eliminates Guesswork

Downhole measurements also eliminate the guesswork in coiled tubing operations. In the milling application, the operator can determine if slow progress is the result of a downhole tool issue or a weight transfer issue, by observing WOB and differential pressure information.  If measurements show that the motor has failed, then the operator knows that a trip out of the hole is required. If friction is the cause, then a short trip may be needed to clean the hole.

The combination of real-time downhole measurements and the larger set of recorded data gives completion engineers the information they need to analyze performance during every phase of the coiled tubing job. With this information, engineers can evaluate bit, motor and coiled tubing performance to optimize vendor selection and improve procedures on subsequent wells.

Download Newton System Tech Data Sheet