Hydraulically-driven rotary casing shoe with multi-stage power system

Abstract

The invention discloses a hydraulically-driven rotary casing shoe with a multi-stage power system. The Hydraulically-driven rotary casing shoe comprises a rotating combination, a non-rotating combination and a bearing system, wherein the rotating combination is rotatably connected to the outer side of the non-rotating combination through the bearing system, and the rotating combination and the non-rotating combination form a multi-stage rotating structure. According to the hydraulically-driven rotary casing shoe, a rotor rotational flow cylinder is pushed by rotational flow which is generated when fluid flows through a stator rotational flow piece, then a redressing guide shoe is driven to rotate so as to pass through a well section with diameter shrinkage and the like which are not beneficial for a casing to pass, the target that the casing smoothly descends to the target depth is achieved, and the multi-stage rotational flow rotor and stator combination is arranged, so that the torque is increased, and the effectiveness of the device is increased.

Description

technical field [0001] The invention relates to the technical field of oilfield cementing operations, in particular to a hydraulically driven rotary casing shoe of a multistage power system. Background technique [0002] In the process of casing running in oil or natural gas well completion, it is very important to successfully run the production casing to the predetermined depth at one time to complete the predetermined goal. During the casing running process, due to various reasons such as formation stability and wellbore trajectory, there will be many factors that are not conducive to the casing running in place, such as wellbore shrinkage, collapse, and high frictional resistance. If the descent is less than the predetermined depth, the resources of the target layer cannot be exploited. If the process of running into the casing is not smooth, it will cause increased operating time and increased costs. In order to promote the casing to run smoothly to the target depth, ...

AI Technical Summary

Problems solved by technology

If the process of running the casing is not smooth, it will increase the operating time and increase the cost

In order to promote the casing to run smoothly to the target depth, sometimes the casing is rotated mechanically at the wellhead to achieve reaming through difficult well sections caused by diameter shrinkage, collapse, etc., but this method has great limitations. Casing rotation is often not possible due to torque limitations of casing connection threads or surface equipment

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