Horizontal-type high-speed roller-cutter-bit bearing spiral seal testing device

Abstract

The invention discloses a horizontal-type high-speed roller-cutter-bit bearing spiral seal testing device, comprising a shaft, a spiral shaft sleeve, and a roller cutter. The spiral shaft sleeve and the roller cutter are in threaded connection; the inner diameter of the spiral shaft sleeve is provided with a sealing screw thread; the roller cutter and the spiral shaft sleeve are both sleeved on the shaft. Among the spiral shaft sleeve, the roller cutter and the shaft, a first sealed hollow cavity is formed; the shaft is provided with a first through hole, a second through hole and a third through hole. The first through hole communicates with the first hollow cavity. Between the spiral shaft sleeve and the roller cutter, there exists an axial gap, forming a second hollow cavity. The first hollow cavity and the second hollow cavity communicate. Both the second through hole and the third through hole communicate with the second hollow cavity. According to the invention, the testing device simulates the structure of a roller-cutter-bit bearing spiral seal in which the roller cutter brings the spiral shaft sleeve to rotate, and through the measurement of the time for discharging the media with sand to test the sand discharging performance of the spiral seal, it is possible to guarantee the successful production and application of a spiral seal product.

Description

technical field [0001] The invention relates to the field of drilling engineering machinery, in particular to a horizontal high-speed roller cone bit bearing screw seal test device. Background technique [0002] The roller cone bit is the most important rock-breaking tool in drilling engineering. It plays a leading role in rock breaking at the bottom of the well. Its working performance directly affects the drilling quality, drilling efficiency and drilling cost. The service life of the roller cone bit is almost directly Depends on the life of the drill bearing, and the life of the bearing depends to a large extent on the life of the seal. The current development trend of the roller cone bit is to achieve high speed. With the continuous increase of the bit speed, the weakness of the bearing seal working in the harsh environment will become more and more prominent. Therefore, while studying the drill bit, the research and improvement of the bearing life must not be ignored. ...

AI Technical Summary

Problems solved by technology

At present, the test device for the helical sealing of high-speed roller cone bits has not yet been involved. Experimental research is the premise guarantee for the smooth progress of field tests and product applications, and the test device is the key to determining the success of the test research. The development of the sealing test device is of great significance to improve the life of the drill bit

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