Casing lowering tools and methods
A tool and casing technology, which is applied in the field of casing lowering tools, can solve problems such as difficulty in lowering casing, achieve the effects of simple structure, improved utilization rate, and solution of necking
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[0029] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation manners of the present invention will now be described with reference to the accompanying drawings.
[0030] Such as figure 1 As shown, the present invention provides a casing running tool, including an impeller mechanism rotated by circulating fluid, and a casing shoe 2 with a cutting edge connected to the impeller mechanism. The casing shoe 2 rotates under the drive of the impeller mechanism, Wherein, the impeller mechanism includes the impeller 12 and the liquid inlet hole 112 positioned at the side of the impeller 12, the liquid inlet hole 112 communicates with the impeller 12, that is, the liquid inlet hole 112 is located on the outside of the impeller 12, and the liquid inlet hole 112 is connected to the upper side of the impeller 12. The space between two adjacent impeller blades is connected. When circulating the fluid, t...
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