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• W2061990672 abstract "Abstract Prior to 1979, the solution to lowering increasing Prior to 1979, the solution to lowering increasing fluid levels in rod pumped wells was to get a larger downhole pump and a higher capacity beam unit. This was simple to do and considered economic. However, with the shortage of steel for sucker rods and beam units, the luxury of obtaining larger units (API 456, 640, etc.) within several months has all but disappeared. Then a new solution appeared on the horizon fiberglass sucker rods. Although they have been in existence since 1973, many problems have prevented their widespread use, until recent developments made them a suitable alternative to steel rods. The original rods, manufactured from 1975 to 1978, were constantly plagued with rod parts due to knots in the glass fiber and gas pockets in the rod body formed during improper curing. In addition, beginning in 1978, rod parts increased due mainly to rod pinch-off at the end connections. A new rod design was developed, which incorporated many new and major modifications to correct the problems that had plagued the previous rod. The actual field performance of these new previous rod. The actual field performance of these new rods supports there applicability in the oil field. Introduction Amoco Production Company, a pioneer in the use of fiberglass sucker rods, is actively involved in their continued use and evaluation. Since the development of the rod in the mid-1970's, Amoco has strived to extensively test and help modify the manufacturing, application, and installation to derive the greatest benefit from this futuristic rod. With the elimination of the first phase of the fiberglass rod era in 1978, Amoco began to actively seek a suitable replacement. Investigation of the failures of the original rods led to design modifications that helped establish the reliability of the fiberglass rod. The use of a state of the art computer program to predict pumping performance, coupled with a clearly defined set of application and installation guidelines also contributed greatly to the overwhelming success of the new fiberglass rod in actual field performance. Amoco Production Company's Odessa District presently has over fifteen strings of the new fiberglass rods installed and successfully operating. This paper documents their success in depths ranging from 5,000'- 10,000', and production ranges of 150 BFPD - 700 BFPD. In addition, Amoco has also installed over fifty strings of fiberglass rods in their other four West Texas and Eastern New Mexico districts, and several are being evaluated in East Texas and on the Gulf Coast. At the present time, all of these additional installations show the same success as those reported in this paper. The changes in the manufacturing process, the use of a computer program for performance process, the use of a computer program for performance prediction, and the development of a new load range prediction, and the development of a new load range diagram are also discussed. Final data indicates that, when designed and installed properly, fiberglass sucker rods are a viable, economic, and often preferable alternative to steel sucker rods. preferable alternative to steel sucker rods. THEORY There were several reasons why the use of fiberglass rods was investigated. Initially, it seemed logical that using a non-metallic substance would reduce corrosion related failures. However, since Amoco is actively involved in an extensive corrosion inhibition program and since protection of the tubing, casing, program and since protection of the tubing, casing, and pump is still required, this benefit has not fully proven itself. proven itself. One of the major benefits is the fact that a fiberglass rod weighs approximately 70% less than an equivalent steel rod. This reduction in weight makes available several options. Due to the lower weight, gear box torque is reduced significantly. They also even out the torque on the gear box. Figure No. 1 shows a typical gear box torque analysis on a test well, before fiberglass rods were installed. The torque fluctuates greatly throughout the cycle, and could cause excessive gear box stress. But when the fiberglass rods were installed, the torque was distributed more evenly throughout the cycle, causing no excessive stress on the gear tax (see Figure No. 2). This enables pumping speed and stroke length to be increased." @default.
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• W2061990672 date "1981-10-04" @default.
• W2061990672 modified "2023-09-25" @default.
• W2061990672 title "Fiberglass Sucker Rods - A Futuristic Solution to Today's Problem Wells" @default.
• W2061990672 doi "https://doi.org/10.2118/10251-ms" @default.
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