Pressure control device of perforation fracturing test system
A technology of pressure control and testing system, which is applied in measurement, wellbore/well components, production fluid, etc. It can solve problems such as insufficient control accuracy, downhole accidents prone to occur, and unstable annular pressure.
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[0025] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0026] Such as figure 1 As shown, the embodiment of the present invention provides a pressure control device for a perforation and fracturing testing system. The perforating and fracturing testing system includes a hydraulic pump 1 and a downhole testing tool communicated with each other, wherein the pressure control device includes A needle valve 2, the needle valve 2 is arranged on the pipeline 3 between the hydraulic pump 1 and the downhole testing tool.
[0027] Because the present invention uses the needle valve 2 with relatively high adjustment accuracy to control the annular pressure, thereby ensuring the stability of the annular pressure between the pip...
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