A multi-finger caliper log of the inside of a completion enables operators to cost-effectively plan work-over and remedial operations, and to keep historical records of the general condition of tubing and casing in order to assess any problems associated to corrosion, wear or mechanical deformation through the life of the well.
A series of independent radial measurements provided by the caliper arms, also commonly referred to as “fingers”, yields a detailed image of the inspected well that can be presented in various formats, including a cross-section of the casing and a 3-dimensional, color-enhanced visualization for tubulars ranging from 1¾-in. to 13½-in. internal diameter.
The ProMAC series tools are currently only available in the 24-finger configuration with an extended range of measurement. The tool has an overall 1-11/16 in (43.0 mm) O.D. to be able to traverse completions ranging from 1.75 to 7.0 in I.D. (44.5 to 177.8 mm). Caliper tools in 40 and 60-finger configurations will also be available in 2020.
As a ProMAC tool logs the internal profile of the completion, the actuation of each finger is converted to an individual electrical signal. The signal is converted into a calibrated radial measurement that is transmitted in a data frame that consists of a frame identifier, individual finger channels, electronics temperature data and a checksum, at a rate of 50 frames per second on HD (or at 10 frames per second on PTX). Directional data is acquired simultaneously and can also be included in the log presentation.
ProMAC tool data can be acquired in real-time on surface read-out with the standard Warrior™ cased-hole logging panel, or in memory mode (memory only available on HD). In either case downhole data can be plotted and processed using Warrior™ software.ProMAC 2019.11.19