Textured roller bit sliding bearing and test method of unit tribological property of texture roller bit sliding bearing

Abstract

The invention discloses a textured roller bit sliding bearing and a test method of the unit tribological property of the texture roller bit sliding bearing. According to the textured roller bit sliding bearing disclosed by the invention, a lubricating medium is arranged between a shaft neck and a bearing, wherein the shaft neck is made of a 20 CrNiMo material; the bearing is made of a beryllium bronze material; a surface texture is arranged on the inner surface of the bearing; the surface texture comprises a plurality of cylindrical pits or elliptically cylindrical pits in uniform distribution or cross distribution along the peripheral direction of the bearing. Aiming at the working condition and special structure of the roller bit sliding bearing disclosed by the invention, the adhesive failure problem of the traditional drill bearing is solved by providing the sliding bearing combined with cylindrical or elliptically cylindrical texture parameters through microscopic structure optimization, thus the service life of a roller bit is prolonged.

Description

technical field [0001] The invention relates to the field of downhole tool tribology, in particular to a sliding bearing with surface texture and a method for testing tribological performance. Background technique [0002] The life of the roller cone bit has always been one of the important issues that need to be considered in drilling engineering. With the increase of drilling depth and the complexity of the drilling environment, the requirements for the life and stability of the roller cone bit are getting higher and higher. Bit bearings are one of the keys that affect their overall life. Lubrication analysis and optimization design for the roller cone bit bearing system to improve the service life of the roller cone bit bearing is an urgent problem to be solved at present. [0003] At present, due to the special structure of the three-cone bit, that is, the small size of the bit, the large load, and the high ambient temperature, it is difficult to improve its life on the...

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Problems solved by technology

[0003] At present, due to the special structure of the three-cone bit, that is, the small size of the bit, the large load, and the high ambient temperature, it is difficult to improve its life on the original basis, mainly reflected in the large load of the sliding bearing of the three-cone bit. , high ambient temperature, poor lubrication conditions, small structural size, etc. This is mainly because the lubrication method of the roller cone bit bearing is a one-time grease storage lubrication method. The lubrication mode of the oil is mainly boundary lubrication and mixed lubrication state, which leads to its failure mode mainly as adhesive wear

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