Drop Ball Frac Valve
A fracturing valve and casing technology, which is applied to wellbore/well valve device, production fluid, wellbore/well components, etc., can solve problems such as nozzle wear, influence on construction process, tool failure, etc. Guaranteed service life
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Embodiment 1
[0014] refer to figure 1 , figure 2 , the present invention includes an upper joint 1, an outer sleeve 4 and a lower joint 7, the upper joint 1 and the lower joint 7 are respectively threadedly connected to the outer sleeve 4 from the inside, and the end of the upper joint 1 close to the outer sleeve 4 is radially symmetrically opened with two through holes, (The through hole is opened on the upper joint of the cylinder, as long as the hole is symmetrically opened in the radial direction, the angle does not matter) The through hole is connected with a hard nozzle 2 through a thread, and the hard nozzle 2 is made of hard alloy; 4. The end of the joint with the upper joint 1 is provided with an external pressure guide port 9, which communicates with the inner and outer sides of the outer shell 4; and block the hard nozzle 2, the lower part of the sliding sleeve 3 fits and slides with the inner wall of the jacket 4, and is close to the bottom of the upper joint 1; the protrudin...
Embodiment 2
[0019] combine figure 1 , figure 2 , on the basis of Embodiment 1, the inside of the return spring 6 is provided with a sand control pipe 5, the bottom end of the sand control pipe 5 is threadedly connected with the lower joint 7 from the inside, and the top end of the sand control pipe 5 is attached to the inner wall of the sliding sleeve 3 from the inside to prevent sand One end of the pipe 5 close to the lower joint 7 is provided with an inner pressure guide port 8, and the inner pressure guide port 8 communicates with the inner and outer sides of the sand control pipe 5. The inner pressure guide port 8 and the outer pressure guide port 9 enable the sliding sleeve 3 to directly bear the hydraulic pressure from inside and outside the fracturing valve, and assist in controlling the opening and closing of the hard nozzle 2 . On the one hand, the sand control pipe 5 can block the impurities brought into the pipe string during the sliding process of the sliding sleeve 3 , and ...
Embodiment 3
[0021] On the basis of the above-mentioned embodiments, sealing rings 10 are provided between the sliding sleeve 3 and the upper joint 1, the sliding sleeve 3 and the jacket 4, and the lower joint 7 and the jacket 4, which are used to seal the contact surfaces to prevent liquids and impurities Access to the frac valve interior through the connection.
[0022] The present invention adopts a normally closed sliding sleeve, which is in the closed state without casting steel balls, and as long as the oil pressure inside the valve is greater than the pressure on the outer casing of the valve, the fracturing valve is always in the closed state; steel balls, open the nozzle, and carry out fracturing construction. In the present invention, the original jetting tool is used for hydraulic sandblasting and perforation, and the ball-type fracturing valve is used for sanding fracturing, thereby reducing the working load of a single tool and effectively ensuring the service life of the tool...
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