Multifinger Imaging Tool (MIT)
The Sondex Wireline Multifinger Imaging Tool (MIT), comprising downhole tools, surface equipment and software, provides high resolution detail on the condition of downhole tubulars. The downhole Multifinger Imaging Tool has an array of hard surfaced fingers which measure very small changes in diameter. A range of tool sizes with 24, 40, or 60 fingers are available to suit different casing diameters. Tool deployment can be via slickline, electric line, coiled tubing or Downhole Tractors. In surface readout mode, a digital surface panel supplies power to the toolstring and decodes the telemetry signals received. In memory mode, a PC and memory interface unit are required.
Magnetic Thickness Tools
The Magnetic Thickness Tool (MTT) uses 12 miniature magnetic sensors, mounted on the inside of a set of bowsprings, to investigate variations of metal thickness within downhole tubulars. Thickness data from MTT may be combined with MIT data using WIVA software to produce powerful 3D images. Statistical reports from MTT data are available using WIPER software.
Well Integrity Visual Analysis (WIVA)
By combining information from the MIT and MTT, images can be created on a computer screen in three dimensions. Color schemes, meshes, arrows and numerical data can be added to help an engineer understand the structure and condition of the well. In particular, the dimensions and type of completion can be shown together with the location and magnitude of any damage. WIVA can also be used to display MIT and MTT data independently.
Well Integrity Processing, Evaluation & Reporting (WIPER)
Data from the MIT and MTT can be automatically processed to identify certain features in the well; most obviously the collars. After setting some parameters, the software carries out a joint-by-joint statistical analysis and builds a report summarizing the condition of the pipe in the well. Reports from subsequent logs on the same well may be compared to see how the pipe condition is changing over time, allowing remedial action to prevent a failure.
Telemetry and Memory
MIT Tool Maintenance
A memory MIT Simulator (MMS) is used during servicing or testing. It is used with the MIT section only and can issue commands to the MIT without the need for a memory section or battery. MIT calibration jigs are used to calibrate the tool fingers prior to an MIT job.
