Solid wax-resisting scale inhibitor for well
A technology of anti-scaling agent and anti-wax agent, which is applied in the direction of wellbore/well parts, cleaning equipment, earthwork drilling and mining, etc. It can solve the problems of poor effect of wax removal and scale removal, and achieve good results
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Embodiment 1
[0019] Embodiment 1: with the above-mentioned compounded anti-wax agent: ethylene vinyl acetate copolymer 56.6%, high-pressure polyethylene 37.7%, 5.7% surfactant (its proportioning is Ni Naer: BAEO-7: kangylbenzene Sodium sulfonate = 1:2.5:1), the scale inhibitor concentration is 4mg / L, the wax and scale inhibitors are cured at a ratio of 70:30 to make a built-in wax and scale inhibitor in solid form, and the shell is selected from 3 Inch tubing is used as the main body. In order to prevent the drug block from collapsing in the later stage of use, it is lined with a central pipe. 2 per well, placed on the upper part of the screen. The wax and scale inhibitor is cylindrical in shape with an outer diameter of 74mm, an inner diameter of 38mm and a thickness of 40mm.
Embodiment 2
[0020] Embodiment 2: with the above-mentioned composite anti-wax agent: ethylene vinyl acetate copolymer 56.6%, high-pressure polyethylene 37.7%, 5.7% surfactant (its proportioning is Ni Naer: BAEO-7: kangylbenzene Sodium sulfonate = 1:2.5:1), the scale inhibitor concentration is 6mg / L, the wax and scale inhibitors are cured at a ratio of 70:30 to make the external wax and scale inhibitor in solid form, which consists of a baffle, It consists of four parts: central pipe, agent and joint, which are 2.5 meters long, and two are placed in the lower part of the screen for each well. The shape of the wax and scale inhibitor is cylindrical with an outer diameter of 74mm, an inner diameter of 38mm, and a thickness of 40mm (the best embodiment).
Embodiment 3
[0021] Embodiment 3: with the above-mentioned composite anti-wax agent: ethylene vinyl acetate copolymer 56.6%, high-pressure polyethylene 37.7%, 5.7% surfactant (its proportioning is Ni Naer: BAEO-7: kangylbenzene Sodium sulfonate = 1:2.5:1), the scale inhibitor concentration is 10mg / L, the wax and scale inhibitors are cured at a ratio of 70:30 to make the built-in wax and scale inhibitors and the external wax inhibitors in solid form Antiscalant, made according to the situation of embodiment 1-2, is placed downhole.
[0022] For the application of wax and scale inhibitors, please refer to the attached table 1: 10 wells before the measures were taken to check the pump for 20 wells, on average 2 wells for a single well. Among them, 3 mouths for three times; 4 mouths for two times; 3 mouths for one time. The 10 wells have a 342-day inspection cycle due to scale. During this measure, all 10 wells were seriously scaled at the operation site, and 8 wells were operated due to scal...
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