Drill rod centralizer

Abstract

The invention discloses a drill rod centralizer. The drill rod centralizer comprises a lower supporting structure and an upper supporting structure, wherein the lower supporting structure is composedof a plurality of lower rolling wheels arranged on the top face of a support, and the upper supporting structure is composed of a plurality of upper rolling wheels arranged at the end of a swing rod,the middle of the swing rod rotates around a supporting seat, and the other end of the swing rod is hinged to the two sides of the support through a connecting rod; and a lifting driving mechanism isarranged at the bottom of the support. According to the drill rod centralizer, the connecting rod and the swing rod are driven by the lifting driving mechanism to move progressively, so that the drillrod centralizer is applicable to drill rods of various different sizes, namely, the drill rod centralizer is not only applicable to the drill rods of conventional sizes, but also applicable to the drill rods of infrequently-used or non-standard sizes, thus being wide in application range; and moreover, when the drill rods of different specifications are replaced, the drill rods can be replaced only through driving the connecting rod and the swing rod to loosen the drill rods through an oil cylinder, disassembling and assembling are not needed, the disassembling and assembling time is saved, and labor cost is reduced.

Description

technical field [0001] The invention relates to the technical field of drilling rig equipment, in particular to a drill pipe centralizer. Background technique [0002] When the drilling tool is fed during the drilling construction process, due to the influence of the drilling tool's own weight, axial force and rotational centrifugal force, the drilling tool will be deflected, which will make the drill hole bend, and the deflected drilling tool will be affected by the rotation. Due to the large alternating load, the drill bit is severely worn, which greatly reduces the service life of the drill tool; installing a centralizer on the drill tool can reduce the deflection of the drill tool. [0003] The applicant's Chinese utility model patent 201920381183.4 discloses a variable centralizer. Several groups of through holes are arranged in the circumferential direction on the upper and lower casings of the centralizer, and each group is provided with at least two through holes. T...

AI Technical Summary

Problems solved by technology

[0004] In view of the disadvantages of the above-mentioned existing variable centralizers such as low applicability and relatively high labor costs, the applicant provides a drill pipe centralizer with a reasonable structure, which can be applied to drilling tools of various sizes and specifications, and has wide applicability , without disassembly and assembly, reducing labor costs

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