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In-Line Quench-and-Temper Technology Applied to CT Improves Safety and Reliability

In unconventional resource plays across the United States, lateral well sections are being extended beyond 10,000 ft. The increased application of larger coiled tubing (CT) of 2.375-in. and 2.625-in. diameter for operations in high-pressure wells has pushed the reliability envelope for conventional CT strings. This paper discusses the advantages of the in-line quench-and-temper (Q&T) process, which enhances overall CT life and reliability by producing tubing with more-uniform microstructure throughout its entire length, increased material strength, and improved bend-fatigue performance.

Technology Background

Applying Q&T technology to CT has transformed well intervention in unconventional shale plays, particularly for multistage fracturing applications in 10,000-ft laterals or longer that are commonly completed with more than 80 intervals per wellbore. With some laterals 14,000 to 16,000 ft long, with 130 or more entry points, manufacturers and service companies have strived to deliver safe, cost-effective solutions for operational challenges. The implementation of technological innovations in surface equipment, downhole tools, and Q&T custom-engineered CT strings, along with refined operational practices and logistics, allows the performance of low-risk completions with over 10,000‑ft laterals on a larger scale. At the time of writing, predictions suggested that more than 90% of the US CT market would switch to Q&T products by the end of 2018.  

This article, written by JPT Technology Editor Chris Carpenter, contains highlights of paper SPE 194255, “In-Line Quench-and-Temper Technology Applied to Coiled Tubing Improves Safety and Reliability in Extended-Reach US Shale Operations,” by Eric Gagen, SPE, and Gaston Piller, SPE, Coil Tubing Partners, and Irma Irais Galvan and Garry McClelland, Global Tubing, prepared for the 2019 SPE/ICoTA Well Intervention Conference and Exhibition, The Woodlands, Texas, USA, 26–27 March. The paper has not been peer reviewed.
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In-Line Quench-and-Temper Technology Applied to CT Improves Safety and Reliability

01 June 2019

Volume: 71 | Issue: 6

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