A stepless flow control device
A flow control device, stepless technology, applied in the direction of wellbore/well valve device, production fluid, wellbore/well parts, etc., can solve the problems of poor reliability, achieve safe and reliable use, convenient adjustment, and simple installation of the device Effect
Active Publication Date: 2018-02-02
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
Since the downhole flow control device works in a high temperature and high pressure environment, the reliability of the electric drive method is poor, and it is still in the laboratory
Method used
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[0022] Such as Figure 1-3 As shown, the stepless flow control device includes: an upper joint 1, an upper outer sleeve 2, an inner sliding sleeve 8, a lower outer sleeve 9, a slotted screen 12, a screen fixing block 13, and a lower joint 14; wherein, the upper outer sleeve 2, The lower jacket 9 is connected by threads, and the upper jacket 2 and the lower jacket 9 are connected to form an inner cavity, and the inner sliding sleeve 8 is located in the inner cavity; the inner sliding sleeve 8, the upper jacket 2 and the lower jacket 9 form a piston cylinder 7; the upper jacket 2 is provided with an upper hydraulic passage 3 and a lower hydraulic passage 4, and the upper hydraulic passage 3 and the lower hydraulic passage 4 communicate with the upper and lower ends of the piston cylinder 7 respectively; the outer side of the inner sliding sleeve 8 has a cylindrical step 81, and the cylindrical step 81 It forms a gap fit with the wall surface of the piston cylinder 7, and realize...
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The invention belongs to the field of petroleum engineering, and in particular relates to a stepless flow control device. The stepless flow control device includes an upper joint, an upper jacket, an inner sliding sleeve, a lower jacket, a slotted screen, a screen fixing block, and a lower joint; the upper jacket and the lower jacket are connected by threads to form an inner cavity, and the inner sliding sleeve is located in the In the inner cavity; the inner sliding sleeve, the upper outer sleeve and the lower outer sleeve form a piston cylinder; the upper outer sleeve is provided with an upper hydraulic channel and a lower hydraulic channel, which communicate with the upper and lower ends of the piston cylinder respectively; the outer side of the inner sliding sleeve has a cylindrical step , and the wall of the piston cylinder form a gap fit; the lower end of the lower jacket has a rectangular valve port in the middle, and a slotted screen is arranged outside the rectangular valve port; the upper joint is connected with the upper jacket, and the lower joint is connected with the lower jacket. The inner sliding sleeve of the movable part of the stepless flow control device can be positioned and locked at any position through the three-position reversing valve and the two-way hydraulic lock, so as to realize the fine control of the reservoir fluid.
Description
technical field [0001] The invention belongs to the field of petroleum engineering, and in particular relates to a stepless flow control device, which is used for fine control of reservoir fluid in intelligent well completion. Background technique [0002] Reservoir flow control technology is the core of intelligent well completion. Through the cooperation of the flow control valve placed in the downhole reservoir and the packer, the pressure and flow of the reservoir are balanced, and the selectivity of each interval or branch of the reservoir is controlled. Injection or production can improve the production status of the oil well, and the flow control valve enables oilfield operators to change the flow characteristics of the interval more conveniently without mechanical workover operations. [0003] At present, there are two ways to adjust the valve opening of the downhole flow control valve used for reservoir flow regulation: hydraulic and electric. WellDynamics, Baker H...
Claims
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IPC IPC(8): E21B43/12E21B34/06
Inventor 相恒富李鹏飞陈春雷焉琳琳
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)