FIELD: mining industry, namely means to seal or pack boreholes or wells, particularly for constructing water wells and for consolidating water-supply well intervals with tail casing pipes under primary casing pipes.
SUBSTANCE: device has tail casing pipe head and gripper system of primary casing pipe, packing members, circlips and sub. Upper part of outer head surface is cylindrical and has left-handed thread. Lower part thereof facing well bottom is conical. Intersection point of conical surface generators lays on well axis. Gripper system of primary casing pipe is formed as a shoe having inner surface defined by two conical surfaces with apexes extending in opposite directions. Adjoining surfaces of tail casing pipe head and casing shoe have 8-10° cone angles.
EFFECT: simplified structure and improved manufacturability, increased reliability and reduced material consumption.
4 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| LINER SUSPENSION DEVICE | 2003 |
|
RU2265118C2 |
| APPARATUS FOR SUSPENDING AND SEALING-AWAY FLUSH CASINGS | 0 |
|
SU1002527A1 |
| DEVICE FOR SUSPENSION AND SEALING OF LINER | 2001 |
|
RU2206713C1 |
| LINER HANGER AND SEALING DEVICE | 0 |
|
SU1740630A1 |
| DEVICE FOR WELL DRILLING IN INCOMPETENT AND DECAYED ROCK ALONG WITH WELL CASING | 2004 |
|
RU2262578C1 |
| DEVICE FOR SUSPENSION AND SEALING BLIND CASING | 2015 |
|
RU2584258C1 |
| METHOD OF SECURING A HIDDEN CASING STRING OF A BOREHOLE WITH ROTATION AND CEMENTING OF THE ZONE ABOVE THE PRODUCTIVE FORMATION | 2020 |
|
RU2745147C1 |
| 0 |
|
SU482554A1 | |
| DEVICE FOR LINER HANGING AND SEALING | 2003 |
|
RU2279536C2 |
| PACKER | 1992 |
|
RU2021486C1 |
