Casing pipe device capable of reducing casing pipe shear deformation and using method thereof
A casing device and shear deformation technology, which is applied in the direction of casing, drill pipe, earthwork drilling and mining, etc., can solve the problems such as the inability to enter the working tools, and achieve the effects of reducing the workload, convenient installation and simple process
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[0038]Example 1
[0039]A casing device for reducing the shear deformation of casing and its use method, such asFigure 1-3As shown, the casing device is installed in the wellbore where the fracture zone 7 is located, and includes a casing 1, an upper centralizer 2 and a lower centralizer 5 arranged on the outer walls of both ends of the casing 1. The outer wall is provided with a metal layer 3, and the outer wall of the metal layer 3 is provided with a water-swellable rubber layer 4.
[0040]The inner side wall of the water-swellable rubber layer 4 meshes with the outer side wall of the metal layer 3 and is fixed to the outer wall of the metal layer 3 by bonding; the outer wall of the metal layer 3 is in a spiral shape. The metal layer 3 is formed by spirally winding a metal belt with a convex cross-section on the outside of the sleeve 1, and the water-swellable rubber layer 4 is made by spirally winding a rubber belt meshed with the metal layer 3 on the outer layer of the metal layer 3.
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Example Embodiment
[0049]Example 2
[0050]Based on embodiment 1, between step 1) and step 2), it also includes the following steps: reaming the wellbore at the location of the fracture zone 7, and the inner diameter of the wellbore after reaming ensures that a thicker cement ring can be formed at this location The outer diameter of the water-swellable rubber layer 4 after expansion is smaller than the inner diameter of the wellbore after reaming.
Example Embodiment
[0051]Example 3
[0052]Such asFigure 4 As shown, the metal layer 3 and the water-swellable rubber layer 4 in this embodiment are corrugated pipes, and the rest of the structure and the method of use are the same as those in the first embodiment.
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