Integrated pitching segmental wall scraper

Abstract

Integral pitch segment scraper. The main purpose of the invention is to solve the problems of limited application and complicated process existing in the existing wall scraper. It is characterized in that: the tool is mainly composed of a body, a compression spring, a pressure-bearing plug, an inner sleeve, a slider, a pressing block, etc.; the body is provided with a groove for placing the scraper body, and the scraper body is located in the groove in the initial state. The bottom is pressed and fixed by the pressing block and the slider mechanism; a spring is placed under the scraper body, and the ratchet structure composed of the inner sleeve and the pressure plug can realize the opening and closing of the scraper body by compressing and restoring the spring. This integrated ball-pitching segmented wall scraper can realize the process of segmented wall scraping, increase the cleaning effect, and at the same time can effectively prevent the problem of casing damage and increase the service life of the casing; realize drilling, grinding, and wall scraping in one trip And drilling and other operations, effectively reducing operating time and reducing operating costs.

Description

technical field [0001] The invention relates to oil drilling and production equipment used in the field of crude oil and natural gas exploitation. Background technique [0002] During the drilling process, due to the retention of drilling fluid, etc., the space inside the casing becomes smaller, which makes it difficult to run the subsequent drilling tools. In severe cases, there will be pipe sticking and damage to the casing. Thereby adopt wall scraper to solve the above-mentioned existing problems. The main purpose of the wall scraper is to remove cement, sand, paraffin and other wastes attached to the inner wall of the casing, to ensure the cleaning of the inner wall of the casing and to ensure the normal progress of drilling construction. However, the existing conventional spring-type wall scraper cannot enter the well simultaneously with tools such as drilling, milling, grinding, and well drilling because the scraper body has already been opened when it enters the well...

AI Technical Summary

Problems solved by technology

However, the existing conventional spring-type wall scraper cannot enter the well simultaneously with tools such as drilling, milling, grinding, and well drilling because the scraper body has already been opened when it enters the well; When the tool goes downhole, the scraper body of the scraper scrapes the casing, and a centralizer of the same casing specification needs to be connected above the scraper. Although this hydraulic scraper can be used for drilling, milling, grinding, and passing Wells and other operations, but after the pin is cut off, the scraper body is always open and cannot be closed

The casing may be scratched during operation with other tools, and centralizers need to be placed, which is complicated in process and high in cost

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