| 摘要 |
<p>A pump plunger for a sucker rod pump includes an elongated plunger body (11) having first and second plunger body ends (18, 17) and a longitudinal plunger body bore (12) extending between the first and second plunger body ends, a first plunger end fitting (22) releasably carried by the first plunger body end (16) of the plunger body (11), a second plunger end fitting (22a) releasably carried by the second plunger body end (17) of the plunger body (11), a first plunger seal pack (38) sandwiched between the first plunger body end (16) and the first plunger end fitting (22) and a second plunger seal pack (38a) sandwiched between the second plunger body end (17) and the second plunger end fitting (22a).</p> |
