Mechanical expansion type leaking stoppage tool and leaking stoppage method thereof
A plugging method and tool technology, applied in the field of oil drilling, can solve the problems of difficulty, failure of plugging operations, and high cost, and achieve the effects of reducing the risk of plugging, improving plugging efficiency, and high pressure bearing capacity.
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[0043] In order to make the technical solutions and advantages of the present invention clearer, the exemplary embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings. Apparently, the described embodiments are only a part of the embodiments of the present invention, and are not exhaustive of all the embodiments. And in the case of no conflict, the embodiments and the features in the embodiments of the present invention can be combined with each other.
[0044] The inventor noticed during the invention that when drilling into fractures and karst caves in the formation during oil drilling, for open large fractures and karst caves, the particle size of the plugging material is much smaller than the size of the cracks and karst caves, so it cannot The plugging cement is retained, resulting in the loss of plugging material, resulting in the failure of the plugging operation.
[0045] In view of the above deficien...
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