Multi-stage power system hydraulically driven rotary casing shoe

Abstract

The invention discloses a multi-stage power system hydraulically driven rotating casing shoe, which includes a rotating combination, a non-rotating combination and a bearing system. The rotating combination is rotatably connected to the outside of the non-rotating combination through the bearing system. The combination of rotations forms a multi-stage rotation structure. The invention pushes the rotor swirl tube through the swirl flow generated by the stator swirl sheet through the hydraulic force, and then drives the reamer guide shoe to rotate through the well section where there is a shrinkage in diameter, etc., which is not conducive to the passage of the casing, so that the casing can be run into smoothly. Aiming at the depth of the target, the combination of multi-stage swirl rotor and stator is set to increase the torque and improve the effectiveness of the device.

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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