A Sucker Rod Centralizer for Oilfield Development

Abstract

The invention relates to the field of oilfield exploitation equipment, and discloses a sucker rod centralizer for oilfield exploitation, which includes an outer casing and a sucker rod. The sucker rod is arranged inside the outer casing, and four The limiting inner plates are symmetrically distributed, and the two ends inside the limiting inner plates are designed with inner slopes. The oil field adopts the sucker rod centralizer. Through the design of the connecting shaft, connecting block, ball, limiting inner plate, scraper, rolling ball and linkage plate inside the outer casing, when the sucker rod pumps oil, the outer casing The ball on the side of the pipe contacts the inner wall of the oil well to reduce the frictional resistance of the movement of the centralizer. The scraper at the position where the top of the inner plate is in contact with the uneven structure such as wax on the inner wall of the oil well moves outward, and the wax on the inner wall of the oil well between the scraper and the inner wall of the oil well realizes the wax scraping effect under the pressure of the linkage plate on the inner limit plate.

Description

technical field [0001] The invention relates to the field of oilfield exploitation equipment, in particular to a sucker rod centralizer for oilfield exploitation. Background technique [0002] The sucker rod is a tool commonly used in oilfield exploitation. By connecting the centralizer to the sucker rod, the outer diameter of the centralizing sleeve is larger than the outer diameter of the sucker rod coupling to play a centralizing role. The centralizing sleeve is high-strength and wear-resistant Carbon fiber and engineering plastics are in contact with the oil pipe to wear the centralizing body and reduce the wear of the oil pipe to achieve the purpose of preventing partial wear. [0003] There are two kinds of existing sucker rod centralizers, one such as Figure 4 The above-mentioned wax-scraping centralizing sleeve scrapes wax through the spiral protrusion 8 on the outside of the outer casing 1. However, the spiral protrusion of this kind of centralizer is always attach...

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Problems solved by technology

[0003] There are two kinds of existing sucker rod centralizers, one such as Figure 4 The above-mentioned wax-scraping centralizing sleeve scrapes wax through the spiral protrusion 8 on the outside of the outer casing 1. However, the spiral protrusion of this kind of centralizer is always attached to the inner wall of the oil well, and the friction loss is large. The other is Figure 5 The ball-type centralizing sleeve shown in the figure reduces the friction between the centralizer and the inner wall of the oil well through the use of balls. However, this kind of centralizer does not have the function of scraping wax. After a long time, there will be too much wax inside the oil well, which will affect the pumping of the sucker rod. Oil action also increases the friction loss of the centralizer

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