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The characteristics of carbon fiber composite continuous sucker rod and application prospects
In order to overcome the ordinary steel rod big quality, high energy, frequent failure and the piston effect, slow speed up the operation and easy to eccentric wear faults [1], the use of unique design and materials of aeronautics and astronautics technology, after ten years of effort, carbon fiber composite materials is developed in the early 1990 s continuous sucker rod, the well operation of the equipment and carbon fiber composite steel continuous sucker rod pumping rod of mixed sucker rod string design software, and a field experiment was carried out.The test results show that the carbon fiber composite continuous sucker rod is a kind of very promising special sucker rod.
CFRPC rod structure of carbon fiber composites or carbon fiber reinforced plastics (CarbonFiberReinforcedPlasticContinuousSuckerRod) for continuous sucker rod CFRPC sucker rod, strip, clinging to the roller can be its cross section is rectangular.Department for carbon fiber reinforced material: heart;Up and down surface of glass fiber cloth, in order to improve the transverse strength of CFRPC sucker rod;Left and right two sides and edges or glass fiber cloth, aramid fiber cloth in order to improve the wear resistance of pumping rod.Substrate for vinyl resin, USES the pultrusion process.
CFRPC the performance characteristics of sucker rod and application prospects
advantages
(1) the density is small, can reduce the polished rod load and speed reducer torque, power saving.CFRPC 59 the density of sucker rod is 1 g/cm3, about one 5 of the steel rod.CFRPC mixed sucker rod steel sucker rod rod string quality lighter than steel sucker rod string by more than 50%, therefore, can reduce the torque of the polished rod load and speed reducer, achieve the goal of saving electricity.Can make the model of beam pumping unit to reduce 1 ~ 2 specifications, reduce equipment investment.
(2) has good elasticity, optimize the design of mixed sucker rod string, can increase oil production.CFRPC rod elastic modulus E = 1 16 x 105 mpa, using mixed sucker rod string design software, the optimization design pumping system, which can realize overtravel, increasing oil production.
(3) corrosion resistance, prolong the pump inspection cycle.
(4) reduced the failure frequency of sucker rod and the piston effect.CFRPC sucker rod in the middle of the no collar, reduces the coupling and the piston effect caused by failure.
(5) CFRPC sucker rod and tubing less friction, reduce the wear of tubing and polished rod load.
(6) under the rod up operation speed, reduce the labor intensity of workers.A blend of sucker rod string up operation speed is faster than the steel rod string about 60%.
(7) to expand the application scope of the sucker rod pump pumping system.Using the average American 640 type pumping unit and oil well pump, pump setting depth is 1493 m, using CFRPC sucker rod, through optimization design, up to 191 t, is induced on daily fluid production output can therefore be part instead of electric submersible pump, used for big strong pump.In addition, CFRPC rod corrosion can also be used for deep well, ultra deep well and well.
disadvantages
(1) CFRPC at both ends of sucker rod and steel fatigue strength of the joint connection is low, is a weak link.
(2) the highest working temperature is only 60 ℃.
(3) can't bear compressive stress, wear-resisting performance is poorer.
(4) the price is more expensive, the United States CFRPC rod close to the price of 22 reinforced plastic fiberglass sucker rod 2 mm, more expensive than 22 2 mm steel sucker rod 1 times.
The application prospect of
CFRPC sucker rod is suitable for the high water cut oil Wells, deep Wells and ultra deep Wells and corrosion of well oil extraction.At present our country about 80000 pumping well, average water cut of crude oil over 80%, pump setting depth of 2000 m in a deep well number accounts for more than 15% of the total number of Wells, the corrosion of well well number also account for more than 15% of the total number of Wells.Therefore, CFRPC sucker rod has a broad application prospect in our country.
Keywords in the article: fiberglass chopped strand Milled E-glass fiber adiator plastic tanks red phosphorus potassium chlorate
