Pulsed steam distributing valve

Abstract

The invention discloses a pulsed steam distributing valve, which comprises valve bodies, valve cores and valve seat limiting rings, wherein upper connectors are connected to the upper ends of the valve bodies; the valve bodies are provided with first through holes and a second through hole, which are axially communicated; oil filling holes are formed in the side walls at the upper ends of the valve bodies; the oil filling holes are communicated with the first through holes; the valve cores can be hermetically arranged in the first through holes and the second through hole in an axial movement way; valve seats are arranged at the lower ends of the valve cores; the valve seats are connected into the valve bodies through cutting pins; and the valve seat limiting rings are positioned at the bottom of the second through hole and connected onto the valve bodies. According to the pulsed steam distributing valve, an oil layer can be intermittently filled with steam, so that the casing wall and the near-wellbore region are effectively washed and the raw oil extraction effect is improved.

Description

technical field [0001] The invention relates to a steam distribution valve, in particular to a pulsating steam distribution valve in the field of heavy oil steam injection catalytic oxidation oil recovery development. Background technique [0002] At present, in order to improve the development effect of heavy oil and super heavy oil wells in oil fields, air catalytic oxidation oil recovery is usually implemented in heavy oil and super heavy oil wells, and gratifying results have been seen. Air catalytic oxidation oil recovery is realized by injecting air and high-temperature and high-pressure steam into the oil well, and the effect of layer-selective injection of air and steam is more ideal than that of general air injection and steam injection. [0003] However, during the implementation process, it was found that the steam distribution valve on the traditional steam injection string simply injects steam into the oil layer due to the fact that there are often dirt and othe...

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Problems solved by technology

[0003] However, during the implementation process, it was found that the steam distribution valve on the traditional steam injection string simply injects steam into the oil layer due to the fact that there are often dirt and other conditions in the near wellbore area and the casing wall, which cannot effectively control the oil layer. When injecting air or steam, the dirt near the wellbore and on the casing wall often affects the entry and exit of crude oil, resulting in unsatisfactory oil recovery

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