Inversion-proof packing box for oil extraction well port

Abstract

The invention relates to an oil extraction well mouth anti-inverse packing device. The technical scheme is that: the invention is composed of a packing nut, a packing box, a packing set, a packing gland, a guide tube and a seal ring, the packing set is arranged in the packing box which is movable, the lower end of the packing box is connected to a locking spare nut and the guide tube in turn, an inner tooth of the packing nut is arranged on the inner wall of the packing nut, a spring is arranged at the back end of a lock tongue, under the action of the spring, the lock tongue rotates downwards along an external thread of the packing box in a clockwise direction. The beneficial effects are that: the invention can effectively prevent the packing nut from being inversed with malevolence and being stolen with oil; when replacing the packing set, because the original packing box is changed from the fixing type to the moving type, the packing box can be moved downwards by the rotation of the screw thread, so the packing set is exposed and is easy to remove, the work efficiency of replacing the packing set is greatly improved.

Description

1. Technical Field: [0001] The invention relates to a polished rod sealing device for an oil production wellhead in the petroleum exploitation industry, in particular to an anti-falling packing device for an oil production wellhead. 2. Background technology: [0002] As we all know, in the oil extraction industry, the distribution of oil wells is relatively scattered due to geographical restrictions, and it is difficult to manage. They are often harassed by criminals, especially heavy oil wells. Under the conditions of more complete anti-theft measures, criminals often use simpler ones. Tools to twist the wellhead packing and pressure cap to steal oil, the cost of oil stealing is low, fast, and difficult to prevent. It not only causes losses to national property, but also easily causes oil well accidents and large-area pollution, which is extremely harmful. Due to the continuous working time of the pumping unit If the packing is long, the replacement of the packing has become the...

AI Technical Summary

Problems solved by technology

[0002] As we all know, in the oil exploitation industry, the distribution of oil wells is scattered due to geographical location, and management is difficult. They are often invaded by criminals, especially heavy oil wells. Under the condition of other perfect anti-theft measures, criminals often use relatively simple The tool steals the oil by twisting the wellhead packing cap. The cost of stealing oil is low, the speed is fast, and it is difficult to prevent. It not only causes losses to national property, but also easily causes oil well accidents and large-scale pollution, which is extremely harmful. Long, the replacement of packing has become the basic work of oil well management, but the continuous wear and compression aging of the packing and the narrow space of the packing cavity make the replacement of the packing extremely difficult

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