Wellhead sealing device for fishing oil and its sealing method for oil fishing

Abstract

The invention discloses a sealing device of an oil bailing wellhead and an oil bailing sealing method thereof. The sealing device comprises a sleeving pipe communicating with an oil bailing well. A short pipe is fixed to the top of the sleeving pipe in a sealing mode. A packing box is fixed to a top opening of the short pipe. Packing is fixed in the packing box. A sucker rod is movably connected in the sleeving pipe along the axis of the sleeving pipe. A puller rubber cylinder is fixed to the upper portion of the side wall of the sucker rod. The top of the sucker rod is connected with one end of a steel cable. The other end of the steel cable penetrates through a through hole formed in the packing and then is connected with a winding device. An oil outlet pipe is arranged on the upper portion of the outer side wall of the sleeving pipe and communicates with the interior of the sleeving pipe. An air jet port is formed in the inner wall of the connecting position of the short pipe and the packing box. The air outlet direction of the air jet port points to the steel cable. The air jet port communicates with an air inlet pipe. According to the structure and the method, an air sealing layer is formed below the packing, so that the situation that oil jets from the gap between the through hole formed in the packing and the steel cable is avoided, the oil leakage phenomenon is avoided, waste of the oil is prevented, the pollution of the oil to a surrounding environment is further avoided, and the working environment of an operator is improved.

Description

technical field [0001] The invention relates to the field of oil fishing operations in onshore oil fields, in particular to an oil fishing well head sealing device and an oil fishing sealing method thereof. Background technique [0002] In many onshore oil fields in my country, due to long-term exploitation, a considerable number of oil wells have entered a period of low pressure and low production, and there has been insufficient fluid supply, which cannot meet the normal work of pumping units. In addition, some low-production wells and remote wells use conventional pumping units for oil production. Due to low production and high infrastructure investment, the cost of oil production increases, and the comprehensive economic benefits are very poor. In order to exploit these oil wells economically and reduce the cost of oil extraction, a vehicle-mounted oil pumping device is used to extract oil (see figure 1 ), compared with the conventional mechanical oil recovery method, i...

AI Technical Summary

Problems solved by technology

[0005] In summary, the disadvantages of the prior art: one is oil leakage, wasting crude oil, and polluting the environment; the other is that a worker is required to operate the packing box pressing cap on site, and the work intensity of the worker is high; root jobs frequently

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