| 摘要 |
<p>An oil well plunger assembly (10) is provided which includes an elongated stem (12) having an upper portion (22) provided with an interiorly threaded bore (24) at an upper end thereof, and a plurality of equally spaced, axially extending flutes (26, 28, 30) defining a corresponding number of flow channels (32, 34, 36) therebetween; a lower coupler component (14) is secured to a lower end of the plurality of flutes. A seal assembly (16) is slidably received over the flutes and supported on the upper end face of the lower coupler (14). The seal assembly (16) includes a plurality of seal rings (52, 54, 56) seated on associated support rings (58), each support ring having a seal ring receiving surface. The seal receiving surface (64) is formed with a plurality of pressure ports (70) communicating the flow channels (32, 34, 36) the pressurization channel (80), and the number of pressure ports exceeds the number of flutes.</p> |
