The Target Intervention Challenger straddle downhole isolation system is designed to allow stimulation treatments of new or underperforming zones in cased holes, while offering benefits previously not obtainable by conventional methods conveyed on e-Coiled Tubing (CT). Electric activation of downhole packers and valves in real-time as well as two-way communication does not only allow pressure isolation and selective stimulation, but also diagnostic functions to be performed prior and after the stimulation treatment. Pressure build-up and decline curves can be generated individually for each perforation interval or ICD directly after electrically activating the packers, not requiring manipulation by the CT. Conventional systems rely on pumping through the CT to activate packers, which will typically disturb the downhole pressures, making diagnostics difficult. Before, during and after the stimulation treatment, pressure and temperature measurements across all packers allow the effectiveness of the stimulation to be evaluated. Pressure communication between individual perforation zones can be identified and ineffective stimulations avoided.

In addition, the system allows for accurate downhole depth control and identification of perforations by using a segmented casing collar locator. Packer life is extended by using a tension-compression sub, avoiding unintentional downhole movement of the system.

The Target Intervention DISCOVERY™ downhole system for cased hole well testing is conveyed on e-Coiled Tubing (CT) and enables a new process of efficiently obtaining accurate downhole pressure and temperature information real-time.

Exploration well testing typically requires the repeated management of periods with flowing or static well conditions. The combination of CT and the Target Intervention DISCOVERY™ downhole system provides full access to mechanical, hydraulic, and electrical manipulations, eliminating the need of switching between different service lines. Nitrogen lifting, as well as change out of different fluids can be performed as required. A stimulation treatment can be performed in the same CT run, allowing instant comparison of the results before and after the stimulation.

A multi-set packer is set above the zone to be tested. Nitrogen can be pumped through the tools flow port if required to assist the well flowing. The multi-cycle electric shut-in valve provides instant shut-in of the well. Pressure build-up curve is displayed real-time at surface for continuous evaluation of reservoir data.

The real time downhole data collected directly at the perforation interval of interest is available during every stage of the testing program Circulation through the CT is always available for manipulation of downhole pressures, even with the packer set. Multicycle Shut-in Valve and multiset packer allow for repeated tests to be performed all in one run, should this be required based on the real-time test results.
The Target Intervention DISCOVERY™ tool is fully electric operated. All functions are controlled from surface, providing superior operator control.

The Target Intervention EXPLORER™ instrumentation system allows real-time monitoring of downhole parameters in any Coiled Tubing (CT) operation. The system offers significant additional benefits, while maintaining all standard functions of a typical CT bottom hole assembly such as emergency release, flapper check valves or circulation sub. The utilization of several types of sensors provide for accurate depth control, operation of downhole tools within their specifications and maintaining operating windows for pressure and temperature. Critical downhole operations can be performed and verified by real-time surface readout. The modular system can be configured such that it becomes a cablehead for logging or perforating applications, thus increasing operational flexibility, efficiency, and reliability.

Additional flexibility is achieved by providing the option of terminating and protecting the CT internal cable for non-electrical applications. Thus the utilization of CT strings, which have cable installed can be increased, eliminating frequent change-out of CT reels.