Magnetic Thickness Detector-E (MTD-E)

The Magnetic Thickness Detector (MTD) is a 1-11/16 in O.D corrosion measuring instrument primarily run through tubing with the unique ability to simultaneously inspect tubing and the casings behind it. The integrity of the casing string can be evaluated with neither the requirement for costly workover rig, nor the time consuming removal of the tubing completion.

Induction of Magnetic Thickness Detector-E (MTD-E)

SCOTON's latest generation MTD tool is capable of evaluating quantitative thickness measurements of three concentric pipes. The state-of-the-art instrument combines a high power transmitter, improved signal-to-noise (SNR) electronics and fully configurable acquisition. This flexible approach allows a wide range of evaluations under different conditions and conveyance systems.

A simple engineer selection of the functional mode allows features such as

  • Logging in large pipes (up to 18-5/8 inches)
  • Fast logging of single pipes
  • Chrome/alloy pipe evaluation
  • Thick casings
  • Memory-optimized logging
Internally the tool acquires up to 300 channels of pulsed eddy current transient decay, that can be transmitted real-time to surface or stored downhole. Real-time logging is possible either in combination below any of GOWell’s existing Multi-Finger caliper (MFC) tools or when combined with PegasusStar–SCOTON's state-of-the-art high-speed telemetry system. Memory acquisition is supported via SCOTON's memory logging system. When run with our PegasusStar platform, the MTD is fully combinable with Multi-Finger calipers (MFC), Gamma-Ray/Temperature/CCL (GTC) and our Digital Radial Bond Tool (RBL). The combination provides a comprehensive evaluation of the well integrity, providing accurate thickness information for multiple pipe strings as well as the cement bond quality.

Description of Magnetic Thickness Detector-E (MTD-E)

The MTD tool has two sets of sensors, one short ("C") and one long ("A"), which use high-efficiency and fast response transmitter coils that deliver high-energy electromagnetic pulses. Based on the Pulsed Eddy Current (PEC) physics principles, the tool records the composite decay of the eddy current signals that are used to evaluaten the properties of the tubing and casings surrounding the tool.

The long sensor records up to 300 channels that scan a wide range of signals from the quick decay of alloy pipes to far-field signals from large casings. The short sensor has a smaller measurement aperture that scans up to 50 channels for better resolution of the inner pipe and near-field signals.

Log processing is performed with SCOTON's proprietary inversion module built within the industry leading Well Integrity platform – MIPSPro. All MFC and MTD data can be processed, viewed and interpreted side-by-side within a single software platform.

  • Slim tool with 1-11/16 in O.D
  • Pegasus modular, combinable tool for both SRO and memory
  • Quantitative 3 pipe thickness evaluation
  • Pre-job planner software that combines a powerful forward modeling module and simulation tool that is used to predict job specific tool responses to allow effective job planning
  • Fully configurable tool caters to a wide range of downhole conditions. Customizable operating modes allow for maximum job flexibility in both SRO and memory modes
  • Full physics inversion processing in an easy to use, user friendly module of MIPSPro Well Integrity Platform
  • 3-axis accelerometer allows monitoring of tool motion, relative bearing and well inclination
  • Warrior Compatible
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