FIELD: technological processes.
SUBSTANCE: invention relates to sectional separating plugs for cementing of stepped casing strings. Sectional separating plug for cementing of stepped casing string consists of a core and a ferrule connected to it and elastic collars having sealing and conical separating parts. Collars from inside are spring-loaded outwards by plates. Tip is equipped with elastic centralizers. Axis distance between upper collar and bottom centralizer is larger than maximum inner diameter of casing string.
EFFECT: technical result is increase in reliability.
1 cl, 2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| CEMENTING PLUG | 0 |
|
SU1705548A1 |
| SECTIONATED DIVIDING PLUG FOR CEMENTING STEPPED CASINGS | 0 |
|
SU1408052A1 |
| METHOD FOR MULTISTAGE WELL CEMENTING AND SET OF EQUIPMENT THEREFOR | 2015 |
|
RU2576253C1 |
| SEPARATING CEMENTING PLUG | 0 |
|
SU1372033A1 |
| CEMENTING PLUG | 0 |
|
SU578440A1 |
| 0 |
|
SU1562430A1 | |
| CEMENTING DEVICE FOR WELLS | 2018 |
|
RU2696039C1 |
| METHOD FOR CEMENTING A LINER IN A WELL AND A DEVICE FOR ITS IMPLEMENTATION | 2021 |
|
RU2773116C1 |
| METHOD FOR INSTALLING A ROTATING LINER IN A WELL AND A DEVICE FOR ITS IMPLEMENTATION | 2021 |
|
RU2777240C1 |
| DISCONNECTOR | 0 |
|
SU857438A1 |
