| Original document(17 pages) Authorized document(15 pages) 中文版 |
The present invention related to a ground equipment for mechanized oil extraction. The said oil pump features that it has a symmetrical layout about the diagonal line of the support cross-section and the diagonal line passes through the wellhead center, and that dual-belt and dual-cylinder transmission, combined rope hanger with pulley, adjustable crown block, cross balanced safety device, planet-cam type stroke-adjusting mechanism, balanced frame-type lifter, and other new-type structures are used. The present invention can effectively solve the problems of transmission of heavy-load oil pump and of stepless adjustment during the operation of long stroke. It is suitable for the oil extraction from deep wells and thick oil wells. |
Application Number
申请号 |
90101054 |
Application Date
申请日 |
1990.03.08 |
| Title 名称 |
Dual-belt dual-cylinder and long-stroke oil-pumping machine |
Publication Number
公开号 |
1044843 |
Publication Date
公开日 |
1990.08.22 |
| Approval Pub. Date |
|
Granted Pub. Date |
1992.11.04 |
| International Classification 分类号 |
E21B43/00 |
Applicant(s) Name
申请人 |
Lanzhou Inst. of Petroleum Machinery, Ministry of Machine-Building and Electroni |
| Address 地址 |
730050 |
| Inventor(s) Name 发明人 |
Bian Wanli, Li Li |
| Attorney & Agent 代理人 |
LIU ZUFENG |
| More information 更 多 信 息 |
|
| Related patents information |
|
|
|
|
|
|