FIELD: mining, particularly well forming tools adapted to construct wells for water or other fluid medium production, to complete well during well drilling and to repair well to prevent sand withdrawal from loose productive beds.
SUBSTANCE: filtering well construction tool comprises well screen, flushing coupling and flushing pipe. Flushing coupling is provided with valve telescopically arranged in the coupling and rigidly connected with flushing pipe. The valve has driving unit and closed central channel located in lower valve part. Valve includes radial channels communicated with well hole clearance through flushing coupling and well screen in upper and lower valve positions correspondingly.
EFFECT: increased reliability of drill cuttings and formation sand removal, as well as increased efficiency of natural screen forming.
4 cl, 1 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| FILTERING WELL CONSTRUCTION METHOD | 2006 |
|
RU2309243C1 |
| FILTERING WELL CONSTRUCTION METHOD | 2006 |
|
RU2309244C1 |
| FILTERING WELL CONSTRUCTION TOOL | 2006 |
|
RU2306408C1 |
| METHOD AND TOOL FOR FILTERING WELL CONSTRUCTION | 2003 |
|
RU2250309C1 |
| METHOD AND APPARATUS FOR FILTER WELL FORMING | 2003 |
|
RU2252303C1 |
| TOOL FOR CONSTRUCTION OF FILTERED WELL | 2001 |
|
RU2209943C1 |
| METHOD AND TOOL FOR CONSTRUCTION OF FILTERING WELL | 2003 |
|
RU2250358C1 |
| FILTERING WELL CONSTRUCTION METHOD | 2004 |
|
RU2280149C1 |
| METHOD FOR BUILDING A FILTERING WELL | 2005 |
|
RU2289017C1 |
| FILTERING WELL CONSTRUCTION TOOL | 2004 |
|
RU2268992C1 |
