Roller bit of rolling and sliding floating sleeve bearing

Abstract

The invention relates to a roller bit of a rolling and sliding floating sleeve bearing for drilling petroleum and natural gas. The roller bit is mainly composed of an oil chamber, a slurry nozzle, a tooth claw, a cone, a rolling and sliding floating sleeve and teeth, wherein the outer brim of the floating sleeve is assembled in an inner hole of the cone; the inner brim of the floating sleeve is assembled on a large journal of the tooth claw; 2-8 arc grooves are uniformly distributed on the outer brim of the floating sleeve; 2-8 arc grooves are also uniformly distributed on the inner brim of the floating sleeve; the arc grooves on the outer brim of the floating sleeve and the arc grooves on the inner brim of the floating sleeve are staggered along the circumference; and a roller pin is embedded inside each arc groove, and the diameters of the roller pins are the same. According to the invention, the rotating precision and the lubricating capability of the floating sleeve bearing can be improved, so that the floating sleeve can normally rotate, and the stability of the floating sleeve bearing in a working process is improved, so as to improve the service life and the work efficiency of the roller bit.

Description

technical field [0001] The invention relates to a roller cone bit of a sliding floating sleeve bearing used for oil and natural gas drilling. Background technique [0002] Floating sleeve bearing is a relatively special bearing structure. After adding a floating sleeve between the cone and claw of the roller cone bit, one friction pair of the original radial sliding bearing is transformed into two friction pairs inside and outside the floating sleeve. , and the relative sliding velocity of each friction pair is lower than that of the original bearing, which increases the contact area of ​​the friction surface and reduces the friction power loss of the bearing. Therefore, if all other parameters remain unchanged, the rotation of the floating sleeve will reduce the friction coefficient of the bearing, reduce the friction power loss and temperature rise of the bearing, and cause the wear speed of the bearing to decrease, thereby improving the wear resistance of the bearing. Al...

AI Technical Summary

Problems solved by technology

Although the floating sleeve bearing is a new type of sliding bearing with good development prospects, there are still areas for improvement. For example, due to the special structure and lubrication method of the roller cone bit, the external friction pair between the floating sleeve and the cone And the lubricating medium of the internal friction pair between the floating sleeve and the claw journal is difficult to be supplemented, and it is necessary to improve the original structure or adopt a new lubrication system; because the floating sleeve in the roller cone bit bearing does not rotate at a uniform speed, and the It is sometimes fast and sometimes slow. The floating sleeve rotates faster when the load of the cone is small. As the load increases, the speed of the floating sleeve becomes slower, which affects the normal operation of the floating sleeve bearing.

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