Drilling liner cementing rubber plug composite colliding device

Abstract

The invention relates to a petroleum drilling and cementing tool, in particular to a drilling liner cementing rubber plug composite colliding device. A drilling rod rubber plug of the device comprises a fixed nut, a connecting rod, a small rubber bowl and a bowl seat, the fixed nut, the connecting rod, the bowl seat and a guiding head are sequentially in threaded connection from top to bottom, the small rubber bowl is sleeved outside the connecting rod, a clamping block is installed on the outside of the bowl seat, and a back-moving spring is installed on the inside of the clamping block. A tail pipe tubular rubber plug comprises a tubular connector, a big rubber bowl and a tubular guiding bowl seat, the tubular connector is designed to be hollow, a clamping block groove matched with the clamping block is designed on the inner wall of the tubular connector, the lower end of the tubular connector is in threaded connection with the tubular guiding bowl seat, and the big rubber bowl is sleeved outside the tubular connector. The drilling liner cementing rubber plug composite colliding device is high in carrying power, reliable in fixation, simple in structure and convenient to use, and solves the problem that the existing well cementation rubber plug is low in carrying power, not safe in use and apt to cause cement inverse returning, low returning outside a pipe, and cement plug leaving in the pipe and the like.

Description

Technical field: [0001] The invention relates to a petroleum drilling cementing tool, in particular to a liner cementing rubber plug composite impact device. Background technique: [0002] In the process of liner cementing, because the liner cannot be shut in to hold the pressure and set, it needs to be pressed. However, the existing cementing rubber plugs have low bearing pressure and are unsafe to use, which can easily cause cement to return and the outside of the tube is low. The problems of cement plugs in the return and pipes have caused poor project quality, many accidents, and large economic losses. Summary of the invention: [0003] The technical problem to be solved by the present invention is to provide a liner cementing rubber plug composite impact device, which realizes high bearing pressure, reliable fixing, simple structure and convenient use. It overcomes the shortcomings of the existing cementing rubber plugs, such as low bearing pressure, unsafe use, easy to caus...

AI Technical Summary

Problems solved by technology

It overcomes the shortcomings of the existing cementing plugs such as low bearing pressure, unsafe use, easy to cause cement return, low return outside the pipe, and cement plug remaining in the pipe.

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