Manufacturing method of reamer with self-righting and guiding function

Abstract

The invention provides a manufacturing method of a reamer with a self-righting and guiding function. The manufacturing method comprises the following steps of firstly, forming a spindle, multiple cones, multiple righting ribs, one or more cone reinforcing ribs, a righting barrel and a base; and then, welding and installing the base, the righting barrel and the cone reinforcing ribs on the spindleaccording to the positions, wherein firstly, the base and a spindle body of the spindle are welded and fixed; the right end of the righting barrel and the left side of the base are welded and fixed, and the left end of the righting barrel and part of spindle body of the spindle are welded and fixed to form a sealed air cavity; one ends of the cone reinforcing ribs are welded with the right side ofthe base; the other ends of the cone reinforcing ribs are welded with the spindle body and the spindle; and then the multiple righting ribs are welded and installed on the righting barrel, and the multiple cones are welded and installed on cone seats. The manufacturing method of the reamer with the self-righting and guiding function provided by the invention has the advantages of simple structure, convenience in processing, high strength of the reamer and the like.

Description

technical field [0001] The invention relates to the directional drilling and crossing construction of large long-distance pipelines in the surface construction of oil and gas pipelines in oil and gas fields, and belongs to the technical field of drilling or drilling engineering. Specifically, it relates to a method for manufacturing a hole reamer with a self-righting guiding function. Background technique [0002] At present, because horizontal directional drilling mainly traverses the strata within 30m from the ground, the strata are broken and broken, especially the entry and exit sections close to the ground are mostly weathered or fully weathered strata, which brings difficulties to directional drilling and hole reaming. However, the existing horizontal directional drilling construction requirements continue to increase, and there are more and more directional drilling projects with a diameter of 1000mm and above, and the requirements for the structure and manufacturing ...

AI Technical Summary

Problems solved by technology

[0003] When common large-scale directional drilling is used for reaming, the existing large-diameter reamers have a tendency to fall when reaming due to their heavy weight, especially when multi-stage reaming has a greater impact on the shape of the channel. Most of them are pear-shaped holes with small top and big bottom. The quality of hole formation is not conducive to the back-tow of the pipeline, which seriously affects the success rate of back-tow and the anti-corrosion layer of the pipeline. Especially for soft geology such as sand and mudstone, the tendency to form pear-shaped holes is more obvious

At the same time, this kind of reamer does not have the function of self-righting and guiding, and an external centralizer is needed to guide the reamer along the axis of the tunnel.

However, the addition of centralizers will increase the weight of the connecting structure and the drill pipe in the hole, increasing the risk of drill pipe breakage

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