Jet-propelled scraper

Abstract

The invention relates to auxiliary machinery for petroleum drilling operation and particularly relates to a jet-propelled scraper. The jet-propelled scraper comprises an anti-overflow pipe, multiple gas nozzles, a rigid air supply pipe wrapper and a gas pipe; the anti-overflow pipe is sleeved with the rigid air supply pipe wrapper, a gas cavity is formed between the outer wall of the anti-overflow pipe and the inner wall of the rigid air supply pipe wrapper, and the rigid air supply pipe wrapper is connected with the gas pipe which is connected with a gas source; the gas nozzles are installed on the pipe wall of the anti-overflow pipe, a gas outlet of each gas nozzle faces a pipe cavity of the anti-overflow pipe, and a gas inlet of each gas nozzle faces the gas cavity. The jet-propelled scraper is high in mud-scraping efficiency, low in labor intensity, safe and convenient to operate, fully mechanized in operation, labor saving, efficient and safe.

Description

technical field [0001] The invention relates to a mechanical device for scraping mud or mud cake of drilling tools during tripping operations of oil wells, which belongs to auxiliary machinery for oil drilling operations. Background technique [0002] Drilling tool tripping operation is an important operation of the drilling team, especially during tripping, a large amount of mud liquid adheres to the surface of the drilling tool, and flows down and accumulates on the drilling floor surface and wellhead tools during wellhead breakout, resulting in inconvenient skidding of wellhead operations and pollution. The original method is to put a rubber disc on the drilling tool, place it between the overflow prevention pipe and the square tile at the well head, and when the drilling tool goes up, the mud on the outer surface of the drilling tool is scraped off and flows into the overflow prevention pipe. The problem with this device is that: [0003] 1. The outer diameter of the d...

AI Technical Summary

Problems solved by technology

[0003] 1. The outer diameter of the drilling tool is different, which makes it difficult to choose the inner diameter of the rubber disc, and sometimes it will fail;

[0004] 2. When the drilling is blocked, the drilling tool will be lowered, and sometimes the rubber disc will be brought into the overflow pipe or hang up, which needs to be installed repeatedly;

[0005] 3. The effect of on-site use is not satisfactory. The old rubber disc has a poor effect of repeated use due to the wear and tear of the inner diameter.

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