Hydraulic control pressurized expansion tube automatic expansion device
A technology of expansion device and expansion tube, which is applied in the direction of wellbore/well components, earthwork drilling and production, etc., can solve the problems of high construction pressure, low safety, complicated operation, etc., and achieve the purpose of reducing ground construction pressure, reducing energy consumption, The effect of ensuring construction safety
Inactive Publication Date: 2021-02-26
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
[0002] The existing expansion tube technology is to directly pressurize the expansion cone, so that the expansion cone moves up or down, so that the expansion tube undergoes plastic deformation, so as to achieve the purpose of diameter expansion. This expansion method requires a large construction pressure. Not only is the safety low, it is prone to major accidents, but also increases the consumption of energy
The improved expansion tube technology is to increase the stress area by increasing the chamber, but it requires very complicated operations and complicated work content
Method used
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[0020]Such asFigure 1 ~ Figure 7The hydraulically controlled pressurized expansion pipe automatic expansion device shown includes a two-position four-way valve return spring 1, a two-position four-way valve spool 2, a two-position four-way valve body 3, an outer wall cylinder 4, a central tube 5, and a storage tank. The energy device piston 6, the lower end cover of the accumulator 7, the first stage piston 8, the chamber connecting piece 9, the second stage piston 10, the third stage piston 11, the expansion cone 12, the upper slip cone 13, the upper slip 14, the upper Slips 15, upper disc spring 16, upper slip 17, lower slip cone 18, lower slip 19, lower slip 20, lower disc spring 21 and lower slip 22, two positions four The valve body 3 is provided with a high-pressure channel 301 communicating with the high-pressure liquid, and the flow direction of the high-pressure liquid is controlled by the action of the two-position four-way valve core 2. The two-position four-way valve bod...
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The invention relates to an automatic expansion device for a hydraulically controlled pressurized expansion tube, which comprises a two-position four-way valve return spring, a two-position four-way valve core, a two-position four-way valve body, an outer wall cylinder, a central pipe, and an accumulator piston , lower end cover of accumulator, first-stage piston, chamber connector, second-stage piston, third-stage piston, expansion cone, upper slip cone, upper slip, upper slip bottom bracket, upper disc spring, upper slip Support, lower slip cone, lower slip, lower slip bottom support, lower disc spring and lower slip support. In the present invention, multi-stage chambers are provided, which can realize effective pressurization effect and reduce ground construction pressure; the present invention can fully automatically realize a series of expansion processes of the expansion pipe through the action of the two-position four-way valve, without the need for The complex operation process does not require manual operation to lift the central tube. The invention works stably and reliably, can ensure construction safety and reduce energy consumption.
Description
Technical field[0001]The invention relates to an automatic expansion device for a hydraulically controlled pressurized expansion pipe, which belongs to the technical field of the petroleum industry.Background technique[0002]The existing expansion tube technology is to directly pressurize the expansion cone to move the expansion cone upward or downward, so that the expansion tube is plastically deformed, so as to achieve the purpose of diameter expansion. This expansion method requires a large construction pressure. Not only the safety is low and major accidents are prone to occur, but also the energy consumption is increased. The improved expansion tube technology increases the force-bearing area by increasing the chamber, but it requires very complicated operations and complex work content.Summary of the invention[0003]In order to overcome many problems existing in the current expansion tube technology, the present invention provides a hydraulically controlled pressurized expansion...
Claims
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IPC IPC(8): E21B29/10
CPCE21B29/10
Inventor 王旱祥陈升山刘延鑫朱晓洋
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)