fax 01-972-952-9435. AbstractThe paper describes a short autonomous instrumented downhole tool (Isub) which incorporates multiple sensors (accelerometers, strain gauges, and magnetometer), a complete data acquisition line, a microprocessor, memory chips and batteries. The tool, available in three sizes (7", 9" and 10" 1/4) can be located anywhere within the BHA even behind a mud motor or rotary steerable system as its total exposed length is of 350 mm. The tool records at a scanning rate of 50 Hz (up to 250 Hz) several tens of hours (100 to 300 hours) forces, moment as well as centripetal, tangential and axial accelerations used to reconstruct the instantaneous bit kinematics (RPM, off axis rotation, side acceleration). Due to its high scanning rate and precision (each sub is fully calibrated) on all channels, the Isub has many benefits, it offers a complete vibration diagnosis: nature (torsional, lateral, axial) , amplitude (stick-slip, backward and forward whirl, bouncing), susceptibility to surface control parameters (WOB, RPM), tracking of bit efficiency and wear, and assessment of downhole equipment "real" performance: hydraulic motor or turbine (power delivered, staling events), rotary steerable system (side force, vibrations). This paper illustrates by two examples some of the insight to the drilling response of the system such tool can provide. The data reveal the occurrence of phenomena (vibrations, motor performance) neither detected nor suspected on surface. It also captures all inappropriate drilling practices. The analysis shows strong evidences of the tremendous potential of such tool not only to gain a better understanding of the drilling process but also to provide a non-bias measure of the drilling performance. Eventually, such tool should help in improving drilling performance and build best drilling practices rules.
fax 01-972-952-9435. AbstractThe paper describes a short autonomous instrumented downhole tool (Isub) which incorporates multiple sensors (accelerometers, strain gauges, and magnetometer), a complete data acquisition line, a microprocessor, memory chips and batteries. The tool, available in three sizes (7", 9" and 10" 1/4) can be located anywhere within the BHA even behind a mud motor or rotary steerable system as its total exposed length is of 350 mm. The tool records at a scanning rate of 50 Hz (up to 250 Hz) several tens of hours (100 to 300 hours) forces, moment as well as centripetal, tangential and axial accelerations used to reconstruct the instantaneous bit kinematics (RPM, off axis rotation, side acceleration). Due to its high scanning rate and precision (each sub is fully calibrated) on all channels, the Isub has many benefits, it offers a complete vibration diagnosis: nature (torsional, lateral, axial) , amplitude (stick-slip, backward and forward whirl, bouncing), susceptibility to surface control parameters (WOB, RPM), tracking of bit efficiency and wear, and assessment of downhole equipment "real" performance: hydraulic motor or turbine (power delivered, staling events), rotary steerable system (side force, vibrations). This paper illustrates by two examples some of the insight to the drilling response of the system such tool can provide. The data reveal the occurrence of phenomena (vibrations, motor performance) neither detected nor suspected on surface. It also captures all inappropriate drilling practices. The analysis shows strong evidences of the tremendous potential of such tool not only to gain a better understanding of the drilling process but also to provide a non-bias measure of the drilling performance. Eventually, such tool should help in improving drilling performance and build best drilling practices rules.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.