Anti-corrosion alloy sucker rod and manufacturing method thereof
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A sucker rod, anti-corrosion technology, applied in anti-corrosion coatings, drill pipes, earth-moving drilling, etc., to achieve the effect of small friction factor and improved wear resistance
Pending Publication Date: 2020-05-08
CHINA PETROLEUM & CHEM CORP +1
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Problems solved by technology
[0004] However, the existing sucker rod should also solve the problem of anti-corrosion
Method used
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Embodiment 1
[0045] An anti-corrosion alloy sucker rod is prepared by the following steps:
[0046] (1) Forming of steel matrix;
[0047] (a) Ingredients: 0.015% carbon, 0.6% manganese, 0.009% phosphorus, 0.005% sulfur, 14.0% chromium, 10.0% nickel, 2.15% molybdenum, 0.80% rhenium, 0.4% zinc, Potassium element 0.05%, nitrogen element 0.13%, boron element 0.035%, the rest is iron element;
[0048] (b) Pretreatment of chromium and molybdenum elements: melting the cage silsesquioxane at a high temperature of 400-450°C, and continuously feeding N 2 flow, continue to heat up to 1050-1150 ° C, according to the weight ratio of cage silsesquioxane to chromium element is 1:3, put chromium element and molybdenum element into hot rolling treatment, stir at 180-200r / min for 1.5- 2h, to obtain nano-scale liquid chromium and molybdenum elements;
[0049] (c) During the electric arc furnace smelting process, the furnace temperature is first raised to 760-780°C, and carbon, manganese, phosphorus, sulfu...
Embodiment 2
[0062] An anti-corrosion alloy sucker rod differs from the first embodiment in that the formula of the steel matrix is different. Among them, 0.015% carbon, 0.6% manganese, 14.2% chromium, 9.5% nickel, 2.2% molybdenum, 0.85% rhenium, 0.45% zinc, 0.06% potassium, 0.12% nitrogen, 0.03 boron %, and the rest is iron.
Embodiment 3
[0064] An anti-corrosion alloy sucker rod differs from the first embodiment in that the formula of the steel matrix is different. Among them, carbon element 0.02%, manganese element 0.8%, phosphorus element 0.04%, sulfur element 0.002%, chromium element 14.3%, nickel element 10.0%, molybdenum element 2.3%, rhenium element 0.9%, zinc element 0.5%, potassium element 0.07% %, 0.15% nitrogen, 0.04% boron, and the rest is iron.
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Abstract
The invention relates to an anti-corrosion alloy sucker rod and a manufacturing method thereof. The anti-corrosion alloy sucker rod comprises a rod body and a joint, and the rod body includes a steelsubstrate, a TiCrN hard thin film, a TiCrSiN anti-corrosion thin film and a polyetheretherketone anti-corrosion coating in sequence from inside to outside. The anti-corrosion properties of the steel substrate are relatively high. The TiCrN hard thin film has relatively high hardness, relatively high working stability and oxidation resistance. The TiCrSiN anti-corrosion thin film has excellent abrasive wear resistance, corrosion resistance and oxidation resistance. The corrosion resistance of the polyetheretherketone anti-corrosion coating is similar to that of nickel steel. In summary, the rodbody of the anti-corrosion alloy sucker rod has excellent anti-corrosion and high-strength performance and a long service life.
Description
technical field [0001] The invention relates to the technical field of oil exploration sucker rods, in particular to an anti-corrosion alloy sucker rod and a manufacturing method thereof. Background technique [0002] At present, the sucker rod is an important component of the rod pumping equipment, which transmits the power of the pumping unit to the downhole pump. In the process of oil production, the sucker rod string bears the effect of asymmetric cyclic load, the working medium is well fluid, and most of the well fluid contains corrosive medium, so the main failure modes of the sucker rod are fatigue fracture and corrosion fatigue fracture. Fatigue strength and service life determine and affect the maximum pump depth and displacement of the entire oil pumping equipment. [0003] Among the existing patents, the Chinese patent with the authorized announcement number CN102839333B discloses a steel material, a sucker rod including it, and the application of steel material,...
Claims
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