Scale cleaning method and equipment for oil field three-phase separator
A three-phase separator and scale cleaning technology, which is applied in chemical instruments and methods, cleaning methods and utensils, and cleaning methods using liquids, etc., can solve the problems of excessive sewage water quality, increased failure probability, and complex structure of the three-phase separator. , to achieve thorough cleaning and ensure normal results
Active Publication Date: 2018-06-01
PETROCHINA CO LTD
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Problems solved by technology
[0002] At present, the actual operation effect of the three-phase separator in some old oilfield combined stations in China cannot meet the production requirements due to fouling
In addition, related equipment such as valves and flow meters on the water pipeline also increase the probability of failure due to serious fouling, which affects the smooth and safe operation of the three-phase separator.
Severe scaling inside the three-phase separator greatly reduces the oil-water separation space, seriously affects the dehydration effect of crude oil, and causes the sewage water quality to exceed the standard. Long-term scaling will suppress the pressure of the internal pipeline, resulting in a series of safety hazards
At present, scale inhibitors are used to prevent this kind of problems. However, due to the complex composition and properties of the oilfield output fluid and the large amount of liquid, the screened scale inhibitors have little effect and cannot completely solve the three-phase problem. Separator fouling problem
Due to the complex internal structure of the three-phase separator, manual or mechanical descaling methods make the internal descaling incompletely cleaned
Method used
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Embodiment 1
[0063] The three-phase separator of the joint station of X Oil Production Plant in Liaohe Oilfield was installed and operated in 2009. Scaling occurred in early 2013. On June 12, 2013, it was found that the electromagnetic valve at the water outlet of the separator could not be closed. Disassemble the solenoid valve and find scaling at the pipe interface, with a thickness of 2cm. In order to prevent the situation from deteriorating further and affecting normal production. Therefore, dosing and descaling operations are carried out. Specific steps such as figure 1 shown, including:
[0064] In step A, the components of the scale are analyzed, and the components and proportions of the scale samples are analyzed.
[0065] Step B, predicting the amount of fouling in the three-phase separator, and calculating the total amount of fouling in the three-phase separator.
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The invention provides a scale removing method for an oil field three-phase separator and equipment of the scale removing method. The method includes the steps that (1), scale of the oil field three-phase separator is sampled, and the obtained scale sample is subjected to component analysis; (2), the total quantity of the scale in the three-phase separator is predicted; (3), a scale removing agent used for scale removing is screened according to the scale sample component analysis result obtained in the step (1); and (4), the scale removing agent screened in the step (3) is used for conducting scale removing work on the three-phase separator. According to the method, the scale in the three-phase separator can be safely, conveniently, efficiently, quickly and completely removed, and normal and safe production operation of an oil field is guaranteed.
Description
technical field [0001] The invention relates to a process method for cleaning scale of an oil field three-phase separator, belonging to the technical field of oil and gas field surface engineering, in particular to a method and equipment for cleaning a scale of an oil field three-phase separator. Background technique [0002] At present, the actual operation effect of the three-phase separator in some old oilfield combined stations in China cannot meet the production requirements due to fouling. In addition, related equipment such as valves and flow meters on the water pipeline also increase the probability of failure due to serious fouling, which affects the smooth and safe operation of the three-phase separator. The internal scale of the three-phase separator is serious, which greatly reduces the oil-water separation space, seriously affects the dehydration effect of crude oil, and causes the sewage water quality to exceed the standard. Long-term scaling will suppress the ...
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IPC IPC(8): B08B3/08
CPCB08B3/08
Inventor 张群周飞郑猛王浩梁凌熏张虎虎高峰王奇
Owner PETROCHINA CO LTD