Ox horn bend weighting rotating sleeve guiding shoe

Abstract

The invention discloses an ox horn bend weighting rotating sleeve guiding shoe which comprises a guiding shoe body with the front end protruding in a curved face mode, and a round head of the curved face protrusion deviates from the central axis to achieve weighting of one side of the guiding shoe body. The sleeve can slide over the circular bead or the step by rotating the sleeve, and the operation of running the sleeve is continued. When the casing pipe is tripped into a horizontal well section, the casing pipe can be helped to slide through a small step due to the fact that one side of the guide shoe is heavier and the rotatability of the guide shoe. A transmission overflowing disc is arranged in the guiding shoe, the rear end of the guiding shoe is connected with a jet flow power short section, and an inclined through hole is formed in the end face of the jet flow power short section. A pump can be started for feeding, the axial straight hole in the front end of the guiding shoe impacts the front well completion fluid, the structural strength of the well completion fluid is destroyed, the viscous force of the well completion fluid is reduced, and the resistance is reduced; the well completion fluid impacts the transmission overflowing disc to obtain torque after flowing through the inclined through hole of the jet flow power short section, so that the guiding shoe is driven to rotate; on the other hand, the eccentric front end of the casing guide shoe can generate disturbance in a large range, and advancing of the casing is facilitated.

Description

technical field [0001] The invention relates to the field of oil drilling and cementing equipment, in particular to an ox horn bend eccentric rotating casing guide shoe. Background technique [0002] In oil drilling engineering, cementing is an important operation. In the whole process of cementing operation, casing running is an extremely important part. If the casing is not lowered to the predetermined position, it means cementing in advance failure, whether remedial measures can be taken is uncertain. Therefore, in the measures for cementing operations, there must be special measures and requirements to ensure that the casing runs to the designed position. [0003] There are many reasons why the casing does not reach the design position, and there are three main reasons: one is the quality of the borehole. Due to the adjustment of the relationship between the inclination and the azimuth, the curvature of the wellbore in some well sections is relatively large, and even s...

AI Technical Summary

Problems solved by technology

When encountering small steps, you can pass through by pressing or turning the casing, but it is often difficult to pass through large steps

The second is the problem of excessive borehole curvature

This method is labor-intensive, time-consuming, increases the risk of stuck pipe, and is sometimes not fully effective

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