One-piece ball-throwing and segmenting wall scraper

Abstract

Disclosed is a one-piece ball-throwing and segmenting wall scraper with an aim to mainly solve problems that an existing wall scraper is limited in application and complicated in technology. The one-piece ball-throwing and segmenting wall scraper is characterized by being composed of a body, compression springs, a pressure bearing plug, an inner sleeve, sliders, pressure blocks and the like; grooves used for placing scraper bodies are formed in the body, and each scraper body is located at the bottom of each groove under the initial state and is fixed through each pressure block and a slider mechanism; the lower side of each scraper body is provided with the spring, and a ratchet structure formed by the inner sleeve and the pressure bearing plug can allow the scraper bodies to be opened orclosed by compressing and restoring the springs. By the arrangement, segmenting wall scraping can be realized, cleaning effect is improved, damage to sleeves can be effectively prevented, and servicelife of the sleeves is prolonged; operations such as grinding, wall scraping and pigging can be completed with one pipe column, operation time is effectively reduced, and operation cost is lowered.

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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