FIELD: mining engineering.
SUBSTANCE: filter simultaneously serves as a drill string, and the filter portion is made along its entire length and located in annular recesses connected to the inner cavity by round holes covered with buried geotextile. Chamfers are removed from upper edges of the circular recesses to prevent formation of stuffing boxes from loam-clay material and plugging of geotextile and water-passing holes during development.
EFFECT: improvement of quality and reduction of labour intensity of the operations, prevention of drainage sanding.
2 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DOWNHOLE FILTER RISE RADIAL DRAINAGE OF NEAR-SIDEHILL SITES | 2016 |
|
RU2636159C1 |
| WATER WELL | 0 |
|
SU1808047A3 |
| PIPE DRAINING HORIZONTAL SHARED FILTER WITH THE LARGE DUTY CYCLE | 2016 |
|
RU2656641C2 |
| WELL FILTER | 1998 |
|
RU2166067C2 |
| WATER WELL | 0 |
|
SU1735513A1 |
| WELL STRAINER ASSEMBLED OF POLYPROPYLENE PLATES | 1996 |
|
RU2131018C1 |
| WELL STRAINER | 1996 |
|
RU2131019C1 |
| WATER INTAKE WELL | 0 |
|
SU1477855A1 |
| DEVICE FOR CONNECTION OF DRILL PIPES | 1996 |
|
RU2114977C1 |
| WELL FILTER OF IMPROVED PERMEABILITY | 2015 |
|
RU2586359C1 |
