The K6-18 well of the No. 1 Oil Production Plant of Henan Oilfield was installed with a CASN metastable special alloy anti-scaling device on January 8, 2016. The pump was inspected on February 16, 2017. The picture below shows the comparison before and after the installation of the anti-scaling device.
Before running into the device, the coupling of the sucker rod is corroded and the sucker rod is scaled by about 2-3 mm.
After being lowered into the device, the sucker rod has no corrosion or scaling.
Well T128-61, Shengli Oil Production Plant, Shengli Oilfield
Cooling water system | Chuxiong Steel large water beam cooling water pipeline scale prevention
● Due to a water supply failure in the cooling water pipeline, a CASN anti-scaling device was installed in November 2017.
● No demineralized water or any medicine has been added within one year of use.
Operation has been running normally.
● The cooling water quality complies with national standards (key detection values, mainly adjusted through continuous discharge and forced discharge). Three months after installation, about 2.5 tons of old scale was removed from the downstream pipelines.
Heat Exchange System | Jilin Oilfield Qian'an Oil Production Plant Combined Station Heat Exchange Furnace Anti-Scale
● The heat exchange furnace of the joint station of Qian'an Oil Production Plant in Jilin Oilfield was severely scaled. The scale thickness in the pipe wall reached 20MM, which seriously affected normal production.
● Before installing the CASN anti-scaling device, chemical descaling and other descaling methods were used successively, but they had no obvious effect.After installing 4 sets of CASN anti-scale devices in January 2018, they were opened for inspection 12 months later and found that not only did no new scale grow in the original pipelines, but even the original old scale was only 1MM thick.
Heat exchange system | Jilin Songyuan Petrochemical cooling system DN80 and DN100 variable diameter type
Heat exchange system | Usage on Ningxia Petrochemical heat exchanger
● On July 23, 2018, a CASN anti-scaling device was installed on the heat exchanger water inlet pipeline. It only took less than 3 hours from construction preparation to installation completion and confirmation of operation.When installing the equipment, check the coil. The scaling situation is quite serious. White hard scale is attached to the outer wall of the coil. It is difficult to knock off the scale by hitting or scraping it with metal tools. Finally, it is about 2cm² square that can be removed by tapping with a sharp hammer. Expose the metal body of the pipe.
● After 90 days of normal operation, the specific use effects were observed on October 23, 2018. The results are analyzed as follows: Equipment usage analysis: After the CASN anti-scaling device was put into use, due to the cooling water in the water tank being processed by the equipment, the outer wall of the coil The hard scale is softened, and the hard scale formed on the outer wall of the coil is softened and becomes fluffy. Use a metal object to scrape a large area and fall off. The scale condensed on the weld of the coil elbow is also effectively softened.Observe that there is no new scale condensation on the metal body. The effect is more obvious under the water tank where the intensity of water flow is high.
● Process technology analysis: Due to the improved heat exchange efficiency, the daily processing capacity increased by 72 tons 90 days after installation, achieving the expected results.
Cooling water system | Chifeng Fubang Copper Mine oxygen production workshop cooling water vacuum pump anti-scaling
Circulating water system | Daye non-ferrous mineral processing circulating water system anti-scaling
● Before use: The circulating water used in Daye Nonferrous Mineral Processing is groundwater that has not been treated in any way. In the past, the equipment was severely scaled, which affected the efficiency of the unit. It required regular descaling through pickling, and even the drainage pipes had to be replaced.
● After use: After installing the CASN anti-scaling device at the main water inlet on January 9, 2019, the use condition is good.The situation reflected from the three observation points of the six units has achieved obvious anti-scaling and descaling effects.
Cooling water system | Zhejiang Chuanhua Group hydraulic oil cooling water system
Cooling water system | Guangxi Tiangui Aluminum circulating cooling water system DN300
The cooling water of the aluminum hydroxide mother liquor plate heat exchanger of Guangxi Tiangui Aluminum Industry has a daily processing capacity of 5000m³. The original cleaning method was pickling, which was later changed to high-pressure cleaning. The cleaning cycle is 2 times/year. After installation, the cleaning cycle is 1 time/2 years.
Yumen Oilfield installation site
Well conditions before the device was installed: Each oil well was cleaned an average of 6 times per year.
Situation of 50 wells installed: So far, the oil well production performance diagram shows that the oil well production situation is running smoothly and the load is stable. The anti-wax and anti-scaling technology has achieved the ideal effect without any additional wax removal and anti-scaling. With the measures taken, the speed of wax formation and scaling has been slowed down, and the production cycle and oil well cleaning cycle have been significantly extended. As of December 31, 2020, a total of 12 wells have not been cleaned, and 2 wells have been cleaned once. Wells, 14 wells were washed 2 times, 8 wells were washed 3 times, 9 wells were washed 4 times, 4 wells were washed 5 times, 1 well was washed 6 times, on average each well Well cleaning 2 times/year.
Gathering and transportation system | Heat exchanger system of Yumen Oilfield Jiudong Union Station
The test application of metastable alloy anti-scale and corrosion inhibition device in Jiudong Union Station has achieved practical results. During the application period, the pressure loss at the inlet and outlet of the adding furnace was stable at 0.02MPa, and the coil scaling rate was reduced by more than 80%. The effect is remarkable.
The produced fluid from the Jiudong formation is characterized by high salinity and high calcium and magnesium ion concentration.During long-term production and operation, crude oil with high water content is heated by the heating furnace, resulting in severe scaling of the coils. Usually, the system needs to be shut down after two years of use.
After installing the metastable alloy anti-scale and corrosion inhibition device, it was found through weighing the inlet and outlet coupons that the corrosion rate of the heating furnace outlet coupons was 0.021mm/a, indicating mild corrosion.Moreover, the device does not need to be shut down for maintenance during use, which greatly saves manpower and material resources.In the next step, we will continue to track the long-term use effect of the device and evaluate the practicality of the device in a deeper level.
