Pumping rod centralizer

Abstract

The invention discloses a sucker rod centralizer, and not only can be stably connected on a sucker rod, but also leads flow channels not to be reduced while leads the structure of a righting piece to meet the need of abrasion resistance, and simultaneously and respectively makes index regulations for a centralizer rod body and righting piece material. The invention consists of an intermediate solid rod body with an internal thread at one end, a connecting rod body with an external thread at one end, a nut with an external thread, and a righting piece. An integral-type centralizer rod body reduces the production cost greatly, simultaneously increases the stiffness, the defaults that the righting piece causes a stuck pump to be crushed, and the righting piece is not abrasion resistant through the disclosure to the intrinsic quality index of the righting piece solves, and the invention can be applied after the centralizer being combined and connected with the two sucker rods during the operating process.

Description

technical field [0001] The invention relates to a rod pump for lifting liquid, especially a low-permeability oil field, an oil-thick well or a production well containing accumulation, a centralizing device for pumping oil in an oil production well, especially a sucker rod centralizer. Background technique [0002] There are many low-permeability oilfields in the national oilfields, and most of the wells are heavy oil wells. With years of development, most of them have entered the late stage of oil recovery, especially Daqing Oilfield has entered the stage of tertiary recovery. Since the adoption of polymer oil recovery technology, a large number of eccentric wear has occurred Wells, due to the eccentric wear of rods and pipes, the number of pump inspection wells is increasing day by day. The academic circles have expressed various opinions on the mechanism of eccentric wear. There are many types of centralizers for controlling eccentric wear, and their structures are differe...

AI Technical Summary

Problems solved by technology

[0002] There are many low-permeability oilfields in the national oilfields, and most of the wells are heavy oil wells. With years of development, most of them have entered the late stage of oil recovery, especially Daqing Oilfield has entered the stage of tertiary recovery. Since the adoption of polymer oil recovery technology, a large number of eccentric wear has occurred Wells, due to the eccentric wear of rods and pipes, the number of pump inspection wells is increasing day by day. The academic circles have expressed various opinions on the mechanism of eccentric wear. There are many types of centralizers for controlling eccentric wear, and their structures are different. Although all types of centralizers have played their due role in controlling eccentric wear, some centralizers have solved the problem of eccentric wear, but have reduced Disadvantages of the oil flow channel space. Although some centralizers have a novel structure and can bring some beneficial effects to the control of eccentric wear, due to the wrong selection of materials, their fatigue strength cannot match that of the sucker rod, or wear resistance, The temperature resistance index is not suitable for the underground working conditions, resulting in more reworked wells, which poses a technical problem for the selection of centralizers to prevent eccentric wear

Images