An intelligent well completion downhole flow valve surface control ultra-high pressure hydraulic system
A technology of intelligent completion and ground control, applied in wellbore/well valve devices, wellbore/well components, sealing/packing, etc. And other issues
Active Publication Date: 2021-09-14
CHINA NAT OFFSHORE OIL CORP +1
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Problems solved by technology
Controlling the opening of the downhole flow valve is one of the keys to intelligent well completion technology. At present, the downhole flow valve is mostly controlled by hydraulic control. The existing hydraulic system is difficult to achieve ultra-high pressure. At the same time, the slide valve structure is adopted. , when the hydraulic oil returns from the bottom of the well along the auxiliary pipeline, the oil temperature is high, and when the high-temperature and high-pressure oil passes through the slide valve, the reliability of the slide valve decreases, making it difficult to realize engineering applications
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Embodiment Construction
[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.
[0021] Such as figure 1 , figure 2As shown, the present invention provides an intelligent completion downhole flow valve surface control ultra-high pressure hydraulic system, which includes a hydraulic station assembly I, a hydraulic pipeline assembly II and a pressure selection assembly III. Among them, hydraulic pipeline assembly II includes high pressure oil circuit, low pressure oil circuit, oil return oil circuit and auxiliary pipeline, pressure selection assembly III includes first to third pressure selection groups L1 to L3, and each pressure selection group is equipped with High-pressure interface, low-pressure interface, oil return interface and auxiliary interface; the input ends of the high-pressure oil circuit and the low-pressure oil circuit are connected with the oil supply end of the hydraulic station assembly I, and the output ends o...
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The invention relates to an intelligent well completion downhole flow valve surface control ultra-high pressure hydraulic system, including a hydraulic station assembly, a hydraulic pipeline assembly and a pressure selection assembly; the hydraulic pipeline assembly includes a high-pressure oil circuit, a low-pressure oil circuit, and a return oil The pressure selection assembly includes three pressure selection groups, and each pressure selection group is equipped with a high-pressure port, a low-pressure port, an oil return port and an auxiliary port; the input ends of the high-pressure oil circuit and the low-pressure oil circuit are connected to the hydraulic station The assembly is connected, the output ends of the high pressure oil circuit and the low pressure oil circuit are respectively connected with the high pressure port and the low pressure port of the pressure selection assembly; the input end of the oil return circuit is connected with the oil return port of the pressure selection assembly, and the output end is connected with the hydraulic pressure port The station assembly is connected; one end of the auxiliary pipeline is connected to the auxiliary interface of the pressure selection assembly, and the other end is connected to the high-pressure oil circuit, the low-pressure oil circuit and the return oil circuit respectively. The invention can be widely used in the technical field of downhole flow valve hydraulic control.
Description
technical field [0001] The invention relates to the technical field of downhole flow valve hydraulic control, in particular to an intelligent well completion downhole flow valve surface control ultra-high pressure hydraulic system. Background technique [0002] In the development process of multi-layer oil and gas reservoirs, it is often necessary to use intelligent well completion technology for oil and gas production in order to detect downhole production parameters, including pressure, temperature, flow rate, etc. Controlling the opening of the downhole flow valve is one of the keys to intelligent well completion technology. At present, the downhole flow valve is mostly controlled by hydraulic control. The existing hydraulic system is difficult to achieve ultra-high pressure. At the same time, the slide valve structure is adopted. , when the hydraulic oil returns from the bottom of the well along the auxiliary pipeline, the oil temperature is high, and when the high-tempe...
Claims
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IPC IPC(8): E21B34/16E21B34/10
CPCE21B34/10E21B34/16
Inventor 刘书杰何玉发许亮斌何东升刘清友盛磊祥叶哲伟刘志杨王宇
Owner CHINA NAT OFFSHORE OIL CORP