Semi-sealing well sealing device for oil well fracturing
A semi-sealing, oil well technology, applied in the directions of sealing/isolation, wellbore/well components, earth-moving drilling, etc. The effect of increasing the waterproof effect and improving the sealing performance
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[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0023] see Figure 3-6 , a semi-sealing and sealing device for oil well fracturing, comprising a casing 1, an active rolling pin 8 is fixedly installed on the left side of the casing 1, and a passive rolling pin 9 is fixedly installed on the right side of the casing 1, and the number of the passive rolling pins 9 is Three, and the other two passive rolling pins 9 are respectively located on the front and back of the shell 1, and the extensions of the active ro...
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