Introduction

The sucker rod centralizer has a paraffin scraper and a couple of limit fastener, and the scraper is a cylinder with an elastic opening and the fastener is installed at both ends of it. The centralizer can be used in the oil tube with 62 mm of inside diameter to make wax remove mechanically and prevent the oil tube eccentric wearing caused by sucker rod, and has no requirement for physical properties of crud oil.

The centralizers are placed at a certain distance along the sucker rod in the pipe when needed, and the paraffin scraper can make wax remove when it drove by the sucker rod reciprocating axially. At the same time, the scraper can rotate automatically so that its service life would be longer because of uniform wearability. Moreover, the reactive force between sucker rod and limit fastener is over 1.5t to ensure the scraper not slide on the sucker rod.

The paten of centralizer has applied and the benefits would be brought to users, including