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- W32203232 abstract "A new dimension in deep well completions, recompletions, and workovers was added when the use of nitrogen was combined with the use of coiled tubing. Units in operation today have 3/4-in. and 1-in. OD tubing which is coiled on a large portable reel and capable of working to depths of 14,000 ft and deeper. Below 14,000 ft, the 3/4-in. coiled tubing has proven valuable when used with high-pressure nitrogen for well testing and recovery of spent acid after large stimulation jobs. Wellhead equipment for 5,000 psi working pressure is common, and special equipment is used for surface pressures up to 10,000 psi. Coiled tubing is run into and withdrawn from the well by means of an endless-chain, traction-type tubing injector driven by 2 hydraulic motors. A depth indicator records the amount of tubing run into the well. Injection or withdrawal speeds of 100 ft/min are possible; however, when injecting the tubing into a well for the first trip, speeds of 40 to 69 ft/min are practical. Some deep well applications (below 15,000 ft) are described." @default.
- W32203232 created "2016-06-24" @default.
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- W32203232 date "1973-03-01" @default.
- W32203232 modified "2023-09-23" @default.
- W32203232 title "Use of nitrogen and coiled tubing in deep wells" @default.
- W32203232 hasPublicationYear "1973" @default.
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