Oil recovery well segment structure

The utility model discloses an oil recovery well segment structure, it includes: two at least straight wells of seting up on the oil reservoir, at least one medicament that is used for pouring into into the chemical flooding in the straight well, in the straight well at least one is used for recovering the oil, the setting is in sleeve pipe in the straight well, the sleeve pipe divides into N cover pipeline section from bottom to top in proper order, and wherein, first sleeve pipe period number is in closing on in the shaft bottom and under lieing in sheathed tube tip, and a N cover pipeline section closes on in the well head and just lies in the sheathed tube upper end, N >= 2 wherein, oil recovery well structure has a N operating condition, when an operating condition, offer the punchhole on first set pipeline section, when M operating condition, offer the punchhole on a M cover pipeline section, M cover pipeline section with be provided with the shutoff piece between the M -1 cover pipeline section, wherei