Packing sealing device for oilfield wellhead

Abstract

The invention relates to an oilfield device, in particular to a packing sealing device for an oilfield wellhead. According to the technical scheme, the packing sealing device for the oilfield wellhead mainly comprises a spring holder, a spring, a lower pressure cap, a rubber packing, a packing box, an upper pressure cap, a packing cap, an engine oil box and a polish rod. The spring holder is fixed at the bottom of the packing box. The spring is fixed on the spring holder. The rubber packing is disposed on the spring. The upper pressure cap and the lower pressure cap are disposed at the top and the bottom of the rubber packing respectively. The upper pressure cap is sealed by the packing cap. The engine oil box is disposed at the top of the packing box. The packing sealing device for the oilfield wellhead has the advantages that the packing sealing device is reasonable in structure and safe and reliable, the polish rod can keep perpendicular to the center when deflecting in all directions, crude oil leakage, pollution and cost consumption caused by wear of the polish rod of the existing packing box can be overcome, and fine burglary prevention is achieved.

Description

technical field [0001] The invention relates to equipment for oilfield wells, in particular to a packing sealing device for oilfield wellheads. Background technique [0002] In the process of oil production in the oil field, because the pumping unit works under variable load for a long time, it is very easy to cause the suspension point trajectory of the pumping unit to deviate from the axis of the tubing string, resulting in partial wear of the sucker rod during the oil production process. Therefore, the wellhead packing box It is the main anti-deflection and anti-blowout tool, but its existing problems are: it does not have the anti-theft function, and the criminals steal seriously; Cannot be compensated automatically. Contents of the invention [0003] The purpose of the present invention is to provide a packing sealing device for oilfield wellhead, which is reasonable in structure, safe and reliable, and plays a very good anti-theft function against the above-mentione...

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Problems solved by technology

[0005] The beneficial effect of the present invention is that the structure is reasonable, safe and reliable, and the polished rod can be kept vertical relative to the center when it is deflected in various directions, which solves the oil leakage and pollution caused by the eccentric wear of the existing packing box , Cost consumption problem, play a very good role in anti-theft

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