FIELD: oil and gas extractive industry.
SUBSTANCE: device has body with cementing apertures and radial channels in it, cover bushing forming a ring hollow with body. In the latter an additional bushing is placed, provided with radial channels. The latter connected inner space of body to behind-pipe space of well for moment of washing and pumping of cement solution of second step. Device is provided with damper mounted inside body and connected by shear elements to support bushing. The latter is stopped against upper end of body and overlaps radial channel. Channels are made in body and connect inner space of body in working position to ring-shaped hollow. The latter is formed by body and branch pipe, rigidly connected to sleeve and pusher end, mounted in this hollow.
EFFECT: simplified construction, higher effectiveness, higher reliability.
2 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| SLEEVE FOR STEPPED CEMENTATION OF CASING COLUMN | 2003 |
|
RU2243359C1 |
| CLUTCH FOR STAGE CASING PIPE CEMENTING | 2005 |
|
RU2278949C1 |
| CLUTCH FOR STEPPED CASING PIPE CEMENTING | 2005 |
|
RU2283943C1 |
| SLEEVE FOR STAGE-WISE CEMENTING OF CASINGS | 0 |
|
SU929816A1 |
| CASING STEPPED CEMENTATION SLEEVE | 0 |
|
SU1765367A1 |
| ARRANGEMENT FOR STEPPED AND COLLAR GROUTING OF WELLS | 0 |
|
SU1090052A1 |
| APPARATUS FOR STAGEWISE CEMENTING OF CASINGS | 0 |
|
SU703650A1 |
| DEVICE FOR CEMENTING CASING STRING OF LARGE DIAMETER | 2015 |
|
RU2580556C1 |
| SLIDE-VALVE GATE FOR CIRCULATION APPARATUS | 0 |
|
SU1532688A1 |
| DEVICE FOR SUSPENSION AND CEMENTING OF LINER IN WELL WITH PRELIMINARY DISCONNECTION FROM TRANSPORT STRING | 2021 |
|
RU2766980C1 |
