The centralizing sucker rod scraper is installed on sucker rod at intervals of one stroke which scraps paraffin in the tubing. Sucker rod goes up and down with
paraffin scrapers to scrape wax in inner wall of tubing. When sucker rod goes up or down, paraffin scraper will whirl 30 degree automatically which can avoid
the eccentric wearing and will prolong the service lifetime more than 15 years. So that the service lifetime of the retainer is longer. The kind of centralizing sucker
rod scraper not only can scrape wax and centralize sucker rod, but also can be used only as sucker rod centralizer. The product’s attrition to tubing is little and
negligible, no matter it used as wax scraper or sucker rod centralizer. Compared with current wax cleaning technology, this wax scraping patent technology has
several advantages, as follows: