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  • Petroleum Technology Digest: Coiled composite line pipe: An attractive injection system replacement


    K. Oglesby, J. Williams and R. Mullins

    Looking at the attractive remaining reserves and property life, operator Oak Resources, Inc. (Unit now operated by Phoenix PetroCorp Inc.) elected to replace the injection lines and continue the waterflood using coiled, continuous, composite pipe instead of carbon steel pipe (internal and external coated) or jointed fiberglass pipe. While the overall installed cost would have been about the same for the different systems evaluated, the deciding factors were the ease of installation, the short downtime of wells and roads, and the projected long-term reliability. After trenching, it took only 1-1/2 days in April 2003 to install about one mile of mixed 3-1/2- and 2-1/2-in. OD lines, including pressure testing. The total installed cost was less than $8 per foot. Only two failures (within 14 days and 10 ft of each other) were experienced within one year of installation, and both were attributed to localized damage during installation. Otherwise the system has performed very well, as expected.

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