FIELD: oil industry.
SUBSTANCE: invention relates to oil-submersible equipment, specifically to downhole filtering devices to prevent ingress of rock particles and proppant into electric-centrifugal pump. Device comprises bearing tube with holes, external filtration element, inner tube forming with bearing tube annular gap, open from above and closed from below, and a safety valve on lower end of inner pipe that separates its cavity from well. Inner tube used is an inner filtering element with inward-facing filtering surface and with upper end covered by additional safety valve.
EFFECT: higher reliability and service life of filtering downhole device.
4 cl, 4 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| WELL FILTERING DEVICE | 2014 |
|
RU2543247C1 |
| SUBMERSIBLE PUMPING UNIT | 2017 |
|
RU2663422C1 |
| DOWNHOLE FILTERING DEVICE | 2014 |
|
RU2575370C1 |
| BOREHOLE FILTER | 2017 |
|
RU2652221C1 |
| INPUT DEVICE FOR CLEANING FORMATION FLUID | 2018 |
|
RU2673493C1 |
| WELL FILTER | 2009 |
|
RU2408779C1 |
| SELF-CLEANING WELL FILTER | 2016 |
|
RU2618248C1 |
| WELL STRAINER | 2010 |
|
RU2446274C2 |
| METHOD FOR PROTECTION OF DOWN-HOLE WELL PUMPS FROM CONTAMINATION WITH MECHANICAL IMPURITIES AND POURING OF BOTTOMHOLE AND WELL PERFORATION INTERVAL | 2020 |
|
RU2742388C1 |
| SLOT-TYPE WELL STRAINER | 2011 |
|
RU2473786C1 |
