Drill pipe capable of transmitting high-bandwidth data from downhole sensors and surface control signals back to those sensors has been developed and successfully tested. The system incorporates a high-speed data cable that runs the length of each joint and downhole tool. The cable terminates at induction coils that are installed in protecting grooves machined in the secondary torque shoulders of doubleshoulder tool joints at each end of the pipe. The coils are recessed in ferrite troughs that focus the magnetic field. The system is virtually transparent to standard rig procedures and offers robust, reliable operation.The paper provides background data on prior work relating to telemetry drill pipe and contrasts the results of these efforts with the new system. The new system has successfully demonstrated data transmission rates of up to 2,000,000 bits/sec. Current mud pulse telemetry is limited to 8 to 10 bits/sec. Electromagnetic technology provides data rates of up to 100 bits/sec, but suffers from hole depth and formation related electric impedance limitations. Full realization of system benefits requires further development of additional drill stem components with highspeed telemetry capabilities including HWDP, collars, jars and top drive subs. A top drive sub that incorporates the telemetry design has been successfully manufactured and tested and is described in the paper. Development efforts relating to other drill stem components are also detailed. The system has been tested in a laboratory environment and in test wells. Results of these tests along with plans for field-testing in actual drilling environments are presented.Telemetry drill pipe can improve well and field productivity by providing more complete, real-time logging information and reduce drilling time and costs and enhance well control by providing real-time downhole drilling data and early kick detection.
One of the most challenging drilling problems encountered in the Western Overthrust belt occurs in the deep Jurassic Preuss salt. A l)istory of lost holes caused by stuck drillstrings, stuck casing, and collapsed casing plagues operators in the Wyoming/Utah Overthrust belt. An ongoing engineering study is being conducted to identify the problem salt-drilling areas and to solve the associated drilling and casing-collapse problems.In the first part of this study, completed in June 1983, salt-drilling problems were studied in the Anschutz Ranch East field. Problem intervals within the salt section were identified, and unique salt-drilling techniques were developed. As a result of implementation of the salt-drilling techniques, salt-drilling success in Anschutz Ranch East has improved substantially.Included in this study are an evaluation and recommendations for mud systems, bottomhole assemblies (BHA's), drilling parameters, and caliper logging through the salt interval. Casing collapse caused by nonuniform loading is discussed, and preventive measures are recommended.
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.