| 摘要 |
<p>An external valve type hydraulic self-sealing piston oil well pump has a traveling valve (2), a piston (3), a pump barrel (5) and a fixed valve (6), the fixed valve (6) is fixed on a lower part of the pump barrel (5), and the traveling valve (2) is placed on an upper part of the piston (3) and out of the piston (3). The fixed valve (6) is connected with a fixed locking bearing (7), which is inserted into a locking bearing seat (8).</p> |
| 申请人 |
HEILONGJIANG JIAXIN PETROCHEMICAL MACHINERY CO., LTD.;CHINA UNIVERSITY OF PETROLEUM (EAST OF CHINA);HAN, XIUTING;SU, XIANG;HAO, CHENGZHI;CHENG, YUANFANG;LI, JUNLIANG;LI, MING |
发明人 |
HAN, XIUTING;SU, XIANG;HAO, CHENGZHI;CHENG, YUANFANG;LI, JUNLIANG;LI, MING |
