FIELD: oil production, particularly oil and gas well operation with periodic working agent supply.
SUBSTANCE: free piston comprises cross-piece or T-joint, lift string, piston arranged inside the lift string, as well as upper and lower damping devices. Upper damping device comprises cantilever rod having outer diameter of central part exceeding that of lower part. Upper rod part has widened boss. Upper widened boss end is transversal to rod axis. Sealing members are arranged over the widened boss. Piston travel limiting plate is located in central rod part. The limiting plate has stop extensions arranged under orifices of cross-piece branches. Stop insert with orifice for stop connection is installed over the plate so that gap is defined between end surfaces of the plate and stop insert.
EFFECT: increased reliability and extended service life.
6 cl, 7 dwg
Title | Year | Author | Number |
---|---|---|---|
PLUNGER LIFT | 2006 |
|
RU2334078C1 |
METHOD OF EXTRACTION OF LIQUID OUT OF GAS PRODUCER | 2006 |
|
RU2330938C1 |
FREE PISTON | 2006 |
|
RU2324047C1 |
FLYING VALVE FOR FREE PIPING | 2006 |
|
RU2327028C1 |
FLYING VALVE, ITS SEPARABLE MEMBER AND METHOD OF WELL OPERATION | 2002 |
|
RU2214504C1 |
PLANT FOR REMOVAL OF FORMATION FLUID FROM WELL, AND METHOD OF ITS IMPLEMENTATION | 2011 |
|
RU2471968C1 |
X-MAS TREE FOR OPERATION OF WELLS IN CONDITIONS OF ACTIVE INGRESS OF WATER AND SAND AND ITS MODE OF OPERATION | 2014 |
|
RU2568256C1 |
METHOD FOR LIFTING FLUID FROM WELL AND DEVICE FOR ITS EMBODIMENT | 1992 |
|
RU2067163C1 |
0 |
|
SU179712A1 | |
PLUNGER LIFT | 0 |
|
SU1751404A1 |
Authors
Dates
2008-03-10—Published
2006-07-05—Filed