CN204371131U - Modified hollow sucker rod centralizer - Google Patents

Abstract

The utility model discloses an improved hollow sucker rod centralizer, which comprises a main body of the centralizer and a centralizing sleeve arranged thereon, an annular lining is arranged between the main body of the centralizing sleeve and the centralizing sleeve, and the annular lining is spirally wound. Structure, pierced on the outer peripheral surface of the centralizer body. The inner and outer surfaces of the annular lining are provided with wear-resistant layers, and the inner surface of the annular inner lining is provided with oil guide grooves along the spiral winding direction. The utility model not only increases the strength of the centralizing sleeve and reduces the deformation of the centralizing sleeve by setting the annular lining of the spiral winding structure, but also can adjust the spacing in the axial and radial directions, so that the existing eccentric wear phenomenon can be produced A certain buffer is implemented to effectively avoid and improve, thereby improving the stability and wear resistance of the centralizing sleeve, saving costs and improving work efficiency.

Description

Improved Hollow Sucker Rod Centralizer

technical field

The utility model relates to a downhole auxiliary facility in the field of oil production in an oil field, in particular to an improved hollow sucker rod centralizer.

Background technique

The centralizer is generally composed of the main body of the centralizer, the centralizing sleeve arranged on it, and the collars at both ends. It is a general auxiliary facility set up for the sucker rod in the downhole operation when using the pumping unit to pump oil in my country's oilfield production, so as to prevent the eccentric wear between the sucker rod and the tubing. In order to solve the problem that the centralizing sleeve is easy to deform and wear during use, the utility model patent of the applicant with the Chinese notification number 202300227 U has previously disclosed a high-temperature-resistant and wear-resistant hollow rod centralizer. A metal skeleton is arranged between the inner peripheral surface and the outer peripheral surface of the sleeve, and a wear-resistant ring is arranged on the inner peripheral surface of the centralizing sleeve to improve the strength and wear resistance of the centralizing sleeve. However, through actual use, the centralizer with this structure is not strong enough because the metal mesh skeleton is easily deformed, so the overall deformation resistance of the centralizer sleeve is not too strong. In addition, although the wear-resistant ring is installed on the inner peripheral surface of the centralizing sleeve, although it can improve the wear resistance of the centralizing sleeve, it does not help much to the eccentric wear that already exists between the sucker rod and the oil pipe, and cannot slow down, coordination and improvement. The utility model patent of China Publication No. 201031636 U discloses a kind of rotary centralizer, by arranging the rotating liner between the centralizer and the rod body, it can only solve the problem that the gap between the centralizer and the rod body is difficult to guarantee. There is no good improvement measure for the eccentric wear between the existing sucker rod and the oil pipe.

Contents of the invention

In view of the above-mentioned defects, the utility model improves the existing hollow sucker rod centralizer, and provides an improved sucker rod with high strength, not easy to deform, timely adjustment of eccentric wear through elasticity, improved wear resistance, and extended service life Centralizer.

The utility model is realized through the following technical solutions: an improved hollow sucker rod centralizer, including a centralizer body and a centralizing sleeve arranged on it, an annular lining is arranged between the centralizing sleeve body and the centralizing sleeve, and the annular lining It is a helically wound structure, which is worn on the outer peripheral surface of the centralizer body.

The further improved technical solution of the utility model is: the inner and outer surfaces of the annular inner lining are provided with wear-resistant layers, and the inner surface of the annular inner lining is provided with oil guide grooves along the spiral winding direction.

The utility model not only increases the strength of the centralizing sleeve and reduces the deformation of the centralizing sleeve by arranging the annular lining of the spiral winding structure, but at the same time, because the annular lining of the spiral winding structure has certain elasticity and stretchability, The spacing can be adjusted in the radial direction, so that the existing eccentric wear phenomenon can be buffered to a certain extent, and effectively avoided and improved, thereby improving the stability and wear resistance of the centralizing sleeve, saving costs and improving work efficiency. The inner and outer surfaces of the annular lining are equipped with wear-resistant layers, which can effectively improve its wear resistance. The inner surface of the annular lining is provided with oil guide grooves along the spiral winding direction, which can clean and discharge the pumped oil in time to ensure continuous and stable work.

Description of drawings

Fig. 1 is a schematic cross-sectional structure diagram of the utility model.

FIG. 2 is a schematic diagram of the structure in the A-A direction of FIG. 1 .

Detailed ways

As shown in Figure 1, the improved hollow sucker rod centralizer includes a centralizer body 2 and a centralizer sleeve 3 arranged on it, and the two ends of the centralizer body 2 are connected with collars 1 .

As shown in Figures 1 and 2, an annular inner liner 4 is provided between the centralizer body 2 and the centralizer sleeve 3. The annular inner liner 4 is a spiral wound structure, which is installed on the outer peripheral surface of the centralizer body 2 and fixed respectively. On the two ends of the centralizing sleeve 3. The inner surface of the annular lining 4 is provided with an oil guide groove 5 along the spiral winding direction to drain oil.

Both the inner and outer surfaces of the annular lining 4 are provided with wear-resistant layers (not shown), such as carburized layers, etc., which can effectively improve its wear resistance.

The utility model has the advantages of simple structure, convenient operation and obvious implementation effect.

Claims (3)

1. modified hollow sucker rod centralizer, comprise centralizer body and the supporting positive cover on it is set, it is characterized in that: be provided with ring lining between described supporting positive cover body and supporting positive cover, this ring lining is helically wound structures, is arranged on centralizer body outer peripheral face.

2. modified hollow sucker rod centralizer according to claim 1, is characterized in that: described ring lining surfaces externally and internally is equipped with wearing layer.

3. modified hollow sucker rod centralizer according to claim 2, is characterized in that: described ring lining inner surface offers oil guide groove along helically coiling direction.