Title:
BEAM PUMPING UNIT WITH A SUSPENDED-WEIGHT BALANCE MECHANISM
Document Type and Number:
WIPO Patent Application WO/2008/077316
Kind Code:
A1
Abstract:
A beam pumping unit with a suspended-weight balance mechanism comprises a frame (2),
a bracket (12), a suspended-weight balance pulley block (13, 14), a wireline (15),
a beam (4) and a driving mechanism. The beam and the driving mechanism are the front-mounted
type. The wireline (15) is a rubber belt with steel wire ropes. The pumping unit
has many advantages, such as longer working life, longer stroke, energy saving
and so on.
Inventors:
YANG FAN (CN)
YANG RONGHUI (CN)
YANG RUOSONG (CN)
YANG RONGHUI (CN)
YANG RUOSONG (CN)
Application Number:
PCT/CN2007/003735
Publication Date:
July 03, 2008
Filing Date:
December 21, 2007
Export Citation:
Assignee:
YANG FAN (CN)
YANG RONGHUI (CN)
YANG RUOSONG (CN)
YANG RONGHUI (CN)
YANG RUOSONG (CN)
International Classes:
F04B47/02; E21B43/00
Foreign References:
| CN201003485Y | 2008-01-09 | |||
| CN2544096Y | 2003-04-09 | |||
| CN2192743Y | 1995-03-22 | |||
| CN2137295Y | 1993-06-30 | |||
| US4483208A | 1984-11-20 | |||
| US4377092A | 1983-03-22 | |||
| US4671126A | 1987-06-09 |
Attorney, Agent or Firm:
XI'AN ZHIBANG PATENT & TRADEMARK AGENT CO., LTD. (Xi'an, Shaanxi 8, CN)
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