Safe long -term double -barrelled water injection tubular column of stand alone type

The utility model provides a safe long -term double -barrelled water injection tubular column of stand alone type, including independent setting's inner tube and independent setting's outer tube, the inner tube coaxial -type sets up inside the outer tube, the chambers of the heart is as feeding through the interior water filling channel of oil reservoir extremely down in the inner tube, the annular space that forms between inner tube and the outer tube is as the outer water filling channel who communicates supreme oil reservoir, annular space position between inside and outside pipe upper end and outer tube upper end outer wall and the sleeve pipe all sets up safety control, is inner tube relief valve, annular space relief valve and annular space safety packer respectively, controls the inner tube respectively, inside and outside pipe ring is empty and outer tube and the three axial passage of casing annulus, totally closed during the realization pit shaft state of emergency, water injection tubular column in the inner tube lower extreme is connected, outer water injection tubular column is connected to the outer tube lower extreme. The utility model discloses solved mainly that unreliable, the interior outer tube of the emergency control reposition of redundant personnel that exists is not in place, the outer tube lost efficacy easily, the unbalanced problem of tubular column atress among the prior art.