| 摘要 |
A downhole steam generator for enhanced oil recovery from a hydrocarbon reservoir accessed by a cased and completed wellbore comprising: a burner assembly within the cased wellbore positioned at the hydrocarbon reservoir, the burner assembly having a downhole burner; a high temperature brush seal having a stack of a plurality of flexible brush rings (300), the brush seal being adapted for sealing a casing annulus between the downhole burner and the cased wellbore, each flexible brush ring comprising an annular ring having a multiplicity of circumferentially space, radially inwardly extending slits (350) which are rotationally indexed from one another to misalign slits of the adjacent annular ring; and means for injection of water into the hydrocarbon reservoir above the brush seal. |
