Self-guiding bushing vibration guide shoe

Abstract

The invention provides a self-steering casing vibration guiding shoe. The self-steering casing vibration guiding shoe comprises a short casing, a coupling, positioning plates, a first power turbine, an eccentric block assembly, a second power turbine, an eccentric head, a plurality of balls, a positioner and a drill bit. The self-steering casing vibration guiding shoe has the advantages that the structure is novel, simple and reasonable, the self-steering casing vibration guiding shoe is especially suitable for a well high in well cementation requirement, in the casing running process, steering of the eccentric head can be adjusted at any time, the casing is guided to run, and the self-steering casing vibration guiding shoe is particularly suitable for a highly-deviated well and a horizontal well; in the circulation process, the solids carrying capacity is greatly improved, the shear breaking effect on detritus at the bottom of the well is obvious, and the cleaning and purifying effects on a well bore are improved; in the circular well cementation process, the dynamic shear force of a drilling fluid or cement is improved, the displacement efficiency is improved, and the mixing and channeling conditions in the well cementation process are reduced; during well cementation, the cementing strength of oil well cement is improved through the shear, stirring and vibration effects, and the well cementation quality is improved.

Description

technical field [0001] The invention relates to a well cementing tool, in particular to a self-guiding casing vibration guiding shoe. Background technique [0002] In petroleum engineering cementing operations, in order to improve the cementing quality, vibration cementing technology is usually used to improve the cementing quality. In addition, when facing highly inclined wells or horizontal wells, rotary floating shoes or guiding shoes are used to solve the problem. The problem of downloading. [0003] The vibration cementing technology at the present stage can be divided into two categories, one is to add force at the wellhead to make the casing rotate or vibrate, but it faces the problems of complex process, high cost and high torque risk; the other is to use eccentric impeller Vibration cementing method, but the effect of insufficient axial vibration on the improvement of cementing quality is not obvious. [0004] In the operation of horizontal wells and highly inclin...

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Problems solved by technology

[0003] The vibration cementing technology at the present stage can be divided into two categories, one is to add force at the wellhead to make the casing rotate or vibrate, but it faces the problems of complex process, high cost and high torque risk; the other is to use eccentric impeller Vibration cementing method, but insufficient axial vibration has no obvious effect on improving cementing quality

[0004] In the operation of horizontal wells and highly inclined wells, most of the rotary floating shoes adopted are eccentric head rotatable head plus single flow hole or multiple flow holes, but there are also problems in well sections facing collapse or shrinkage. Difficult to run in. Insufficient chip-carrying capacity

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