Sucker rod deviation-based anti-eccentric wear sealing packing box

Abstract

The invention discloses a sucker rod deviation-based anti-eccentric wear sealing packing box, which comprises a packing box main body, colloid packing, a steel packing pressure cap and a steel packing pressure cover and is characterized by also comprising a basic rubber cushion, a steel sheet gasket and a steel packing steel jacket. With the unique structure of the packing box main body, eccentric hole structures formed in the middle of the basic rubber cushion and the steel sheet gasket, the matching structure of the steel pacing steel jacket and the steel sheet gasket, the specific structure of the basic rubber cushion and related structures matched with the basic rubber cushion, the whole device enables a deviated sucker rod to drive the circular tube-shaped pacing steel jacket to shift in the derivation direction of an oil-sucking polish rod along the upper surface of the steel sheet gasket so as to drive the round colloid packing placed in the packing steel jacket to shift together, the polish rod is concentric with the packing which penetrates through the polish rod, so that the deviated sucker rod avoids causing eccentric wear of the packing and causing mechanical damage,. Thus, the service life of the packing is prolonged and the packing is intact after being used for one year.

Description

technical field [0001] The invention relates to an anti-eccentric wear sealing packing box based on the deflection of a sucker rod, which belongs to the technical field of oilfield machinery. Background technique [0002] The pumping unit is the beam pumping unit, commonly known as the "kowtow machine", which is a kind of machinery and equipment widely used in oil fields to exploit oil. In order to prevent the wellhead from leaking oil during the continuous up and down reciprocating movement of the pumping unit, a sealed packing box is used at the wellhead of the oil well. [0003] At present, there are many types of sealed packing boxes, (references, Chinese patent, self-adjusting anti-theft packing box, application number is 02273558.5, inventor: Li Zigao, Wang Jinzhi, Wang Mingguang; Chinese patent, application number CN01260289.2, Wang Hongxin Yang Xudong; Chinese patent, application number CN02241329.4, inventor: Zheng Jinhua; Yu Honghai) However, effective anti-eccent...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the long-term problem of oil leakage at the wellhead caused by eccentric wear of the wellhead sealing packing due to the non-concentric phenomenon between the wellhead oil pipe and the sucker rod moving up and down in the oil pipe, the invention provides A sealed packing box for pumping unit based on sucker rod deflection

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