Theoretical and Experimental Investigations on 20 Inches Threaded Casing Connections Failure under Field Conditions
Received: 29 June 2021 | Revised: 22 July 2021 | Accepted: 25 July 2021 | Online: 21 August 2021
Corresponding author: D. G. Zisopol
Abstract
This paper brings forward the results of theoretical and experimental investigations performed to determine the causes that led to the failure of 20 inches threaded casing connections during the tubing of the Lupşa Sat No. 1 oil well, Romania. The failure occurred due to the breakout of the threaded casing connections assembled in the factory. In order to establish the main causes of failure, theoretical investigations were taken into consideration to highlight the influence of the thread element errors on the correct make-up casing pin–coupling (box) conditions and to the axial tensile strength of the threaded casing connection. In addition, experimental investigations were performed on the failure casing connections, consisted of measuring the dimensional characteristics of the thread elements to determine the performance and monitor the technical condition of the tubular material used in the petroleum industry.
Keywords:
threaded casing connections, failure, investigation, expertiseDownloads
References
N. Konkong, "An Investigation on the Ultimate Strength of Cold-Formed Steel Bolted Connections," Engineering, Technology & Applied Science Research, vol. 7, no. 4, pp. 1826-1832, Aug. 2017. https://doi.org/10.48084/etasr.1243
V. Ulmanu, Material tubular petrolier. Bucharest, Romania: Editura Tehnică, 1992.
T. H. Hill, "What you should know about OCTG inspections," World Oil, vol. 199, no. 5, pp. 64-68, Oct. 1984.
T. H. Hill, "Tracking OCTG inspection results saves time and money," World Oil, vol. 201, no. 5, pp. 70-72, Oct. 1985.
K. K. Biegler, "Conclusions Based on Laboratory Tests of Tubing and Casing Connections," presented at the SPE Annual Technical Conference and Exhibition, Sep. 1984. https://doi.org/10.2118/13067-MS
IADC Drilling Manual. Technical Toolboxes Inc., 2000.
API SPEC 5B : Threading, Gauging, and Inspection of Casing, Tubing, and Line Pipe Threads. API, 2010.
"Seal-lock HT Ancillary Specification." Hunting.
M. L. Payne, R. E. Leturno, and C. A. Harder, "Improving operational procedures can reduce fatigue failure in 8-rd casing," Oil and Gas Journal; (United States), vol. 92, no. 48, Nov. 1994.
Quality Procedures. Energy Technology Manufacturing & Threading, LLC.
TDWIN TAPER Thread Disk for Tapered Threads. HOU, USA: Gagemaker, 2011.
Technical Committee ISO/TC 67/SC 5, ISO 11960:2001: Petroleum and natural gas industries - Steel pipes for use as casing or tubing for wells. 2001.
Bulletin on Performance Properties of Casing, Tubing, and Drill Pipe. API, 1989.
Bulletin on Formulas and Calculations for Casing, Tubing, Drill Pipe and Line Pipe Properties. API, 1989.
A. Chenarani and E. A. Druzhinin, "A Quantitative Measure For Evaluating Project Uncertainty Under Variation And Risk Effects," Engineering, Technology & Applied Science Research, vol. 7, no. 5, pp. 2083-2088, Oct. 2017. https://doi.org/10.48084/etasr.1530
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Copyright (c) 2021 D. G. Zisopol, M. Minescu, M. Badicioiu, M. M. Caltaru
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