A drill pipe mud scraper

Abstract

The invention belongs to the technical field of petroleum drilling, and in particular relates to a drill pipe mud scraper. The drill pipe mud scraper includes a pressure plate, the top of the pressure plate is inserted through a casing, the inner side of the casing is provided with a movable pipe, the outer side of the movable pipe is fixedly connected with two limit rings, and the inner side of the casing corresponding to the position of the limit ring is provided with a An annular limiting groove, and the limiting ring is located in the limiting groove, and a plurality of installation holes are opened through the inner wall of the movable pipe. In the present invention, the casing is provided, and during the upward movement of the drill rod, the roller drives the driving rod to contact the dial through the transmission effect of the first gear belt and the second gear under the action of the drill rod, so that the movable pipe is in contact with the shifting plate. Under the cooperation of the lever and the dial, the first scraper on the inner side is driven to scrape mud on the surface of the drill pipe in a circular manner. Since the movable pipe is always in a rotating state, the mud is not easy to adhere to the bottom of the movable pipe and the first scraper. On, thereby ensuring the normal operation of the first scraper.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling, in particular to a mud scraper for drilling pipes. Background technique [0002] In the process of drilling an oil well, it is often necessary to take out the drilling tool from the oil well, so as to check the drilling tool or connect the drill pipe. During the process of taking out the drilling tool, due to the mud attached to the drill pipe, when the drill , the mud and well fluid will be scattered on the workbench near the wellhead driven by the drill pipe, which will cause the workbench to be slippery and affect the working safety of the staff. In order to prevent the mud and well fluid from splashing, when the drilling tool is taken out, A mud scraper will be fitted on the drill pipe close to the wellhead, so that the mud and well fluid attached to the drill pipe can fall back into the oil well under the action of the mud scraper. [0003] The existing mud scraper is generally a...

AI Technical Summary

Problems solved by technology

[0002] In the process of drilling an oil well, it is often necessary to take out the drilling tool from the oil well to check the drilling tool or connect the drill pipe. During the process of taking out the drilling tool, due to the mud attached to the drill pipe, when the drill pipe is taken out , the mud and well fluid will be scattered on the workbench near the wellhead driven by the drill pipe, which will cause the workbench to be slippery and affect the working safety of the staff. In order to prevent the mud and well fluid from splashing, when the drilling tool is taken out, A mud scraper will be installed on the drill pipe near the wellhead, so that the mud and well fluid attached to the drill pipe can fall back into the oil well under the action of the mud scraper

[0003] The existing mud scraper is generally a rubber disc with a relatively simple structure, and the existing mud scraper is static when scraping the drill pipe, and there is more mud on the surface of the drill pipe. During the removal process, the mud is easy to adhere to the bottom of the mud scraper, which will cause the mud scraper to be stuck. In addition, because the mud scraper and the surface of the drill pipe are closely bonded, after a long time of mud scraping operation , the inner side of the mud scraper is easy to wear, so that the worn part of the mud scraper does not have a good scraping effect on the drill pipe

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