Divide and annotate tubular column with testing a nipple joint

The utility model relates to an oil extracting worker journey layering water injection technology field, in particular to well bridge type off -centre of shaking out are prevented returning and are told divide and annotate tubular column with testing a nipple joint. The device's coupling lower extreme inner wall and center tube upper end outer wall threaded connection, the lower extreme at the water injection packer is connected to the coupling upper end, and the center tube lower extreme is connected in the upper end of water injection mandrel, and the design has location step on the inner wall of center tube upper end, is equipped with electronic direct reading in the center tube and tests and seal an appearance, and on electronic direct reading was tested and is sealed the location step of appearance seat on the center tube inner wall, the design of center tube lower extreme inner wall had the chamfer. The utility model discloses a divide the notes tubular column to test step by step and seal, through the