Annulus safety control device for multi-pipe production pipe column and using method of annulus safety control device
The annulus safety control device for the multi-pipe production pipe column comprises a sealing working barrel and an outer barrel structure, an annulus is formed between the outer barrel structure and the sealing working barrel, the outer barrel structure comprises a coupling, an upper connector, a...
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Main Authors | , , , , , , , , , , |
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Format | Patent |
Language | Chinese English |
Published |
13.05.2022
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Subjects | |
Online Access | Get full text |
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Summary: | The annulus safety control device for the multi-pipe production pipe column comprises a sealing working barrel and an outer barrel structure, an annulus is formed between the outer barrel structure and the sealing working barrel, the outer barrel structure comprises a coupling, an upper connector, a piston sleeve, an upper connecting body, a lower connecting body and a lower connector, a piston cavity is formed in the piston sleeve, a piston is arranged in the piston cavity, and the lower connector is connected with the upper connector. A first step is arranged on the upper connecting body, a connecting sleeve is arranged at the bottom of the piston, a push rod is arranged at the bottom of the connecting sleeve, a spring is further arranged at the bottom of the connecting sleeve, and a multi-stage sealing mode with a leather cup self-sealing function and a split valve plate sealing function is further arranged in an annular cavity between the lower connecting body and the sealing working barrel. According to |
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Bibliography: | Application Number: CN202011167813 |