| 摘要 |
<p>This invention provides a sucker rod scraper having two main portions. An inner portion is constituted by a plastic body member affixed to and surrounding the sucker rod, the body member including an elongated cylindrical portion with a plurality of longitudinal fins extending radially outwardly therefrom and spaced angularly therearound. The second part is a plastic ring member adapted to encircle the central body adjacent the fins, the ring member having an inner diameter greater than the outer diameter of the adjacent part of the inner portion, whereby to allow a passageway for fluid or liquid to flow past the sucker rod scraper. Means are provided for retaining the ring member adjacent the fins, this being constituted in the preferred embodiment by the provision of inward recesses along the outer edges of each fin, with the ring member being dimensioned so as to permit it to register within the recesses, whereby the ring can rotate in position but cannot move longitudinally.</p> |
