The utility model discloses an area is pushed down well completion pipe cluster and is connected with one -way level pressure, connect body, packoff nipple and case including the level pressure, the level pressure connects the body upper end and is the link, and fixed connection is sealed up to lower extreme and packoff nipple upper end, and the packoff nipple lower extreme is the link, and the sealed fixed setting of case connects originally internally in the level pressure. The utility model discloses it is experimental to carry out the ground static pressure, can go into the well after the experiment is qualified, guarantees its reliability, guarantees construction operation safety.