A double-layer steel pipe expandable external packer

Abstract

The invention relates to the technical field of external packers, in particular to a double-layer steel pipe expansion type external packer, which is connected to the central control room based on the regional network signal, including a main structure, a split structure, a main connecting pipe and a split connecting pipe , there is at least one split structure, the top of the split structure is connected to the split structure through the main connecting pipe, the two split structures are connected through the split connecting pipe, and the lowest end of the split structure is installed with an extension Pipe; the present invention realizes synchronous extraction and partial extraction of single oil layer and multi-oil layer oil body, and also detects the oil pressure through the set pressure detection component during the oil pumping process, and cooperates with the set bottom seal component and ring side seal component And expansion sealing components, to realize the free switching of multi-layer pumping, partial closure and overall closure of the oil production site, improve the quality of oil pumping and the stability of the oil pumping process, and enhance the efficiency of oil pumping.

Description

technical field [0001] The invention relates to the technical field of external packers, in particular to a double-layer steel pipe expansion type external packer. Background technique [0002] The outer pipe packer is an important tool in the process of petroleum cementing and selective well completion. It is connected with the casing and is a downhole tool used to seal the annular space between the casing and the well wall. Separation of layers is implemented, and at the same time, the traditional oil pumping method pumps oil from the bottom, which may easily cause the oil pumping area to be hollow, and the oil in the upper part of the rock layer will flow to the lower part, and the fractured part of the drilling hole will be washed away, causing the rock layer to be easily disconnected and the oil body It is easy to produce impurities and affect the overall quality of the oil pumping oil. For example, when only one layer is extracted in offshore oil pumping, due to the ra...

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Problems solved by technology

[0003] The purpose of the present invention is: by setting the main body structure, the split structure, the main body connecting pipe, the split connecting pipe and the extension pipe, thereby isolating each oil layer and carrying out oil pumping to realize synchronous extraction of single oil layer and multi-oil layer oil body and local pumping, during the oil pumping process, the oil pressure is detected by setting the pressure detection component, and the bottom sealing component, the ring side sealing component and the expansion sealing component are set up to realize the free switching and partial closing of the multi-oil layer pumping and the overall Close the oil extraction site, improve the quality of the oil pumping and the stability of the oil pumping process, enhance the efficiency of the oil pumping, and solve the problem of traditional oil pumping from the bottom, which is easy to cause the internal hollow of the oil pumping site, and the oil in the upper part of the rock layer To the lower part, scour the fractured part of the drill hole to cause the easy rock layer to be disconnected, so that the oil body is prone to impurities and affect the quality of the oil body; through the positioning label module, information collection module, oil body analysis module, feedback execution module and oil body The evaluation module realizes the positioning of the separator, the information collection, analysis, feedback and switching of the oil body, and switches the oil circuit of the low-quality pumping part to prevent it from affecting the quality of the overall oil circuit, without changing the pumping efficiency. , which further improves the quality of the extracted oil body, and solves the problem that traditional equipment cannot collect and detect the oil quality of the entire oil area, resulting in low-quality oil affecting the entire oil body

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