The retrievable skewer is a key tool in branch well drilling technology, and plays a vital role in the drilling and completion of branch wells. However, the retrievable recliners in the prior art are all mechanically seated, and the reliability of the seat seal is poor, and the recliner often falls off, which is inconvenient in the review process, thereby reducing its recovery rate. , the recovery method is a single way to recover. On the one hand, it is difficult to determine the relative positional relationship between the skewer and the recovery tool in the actual salvage process, so it is difficult to connect the two. Connection, in the face of various complex working conditions in the well, it is often easy to slip after collision because there is no two-way restriction between the two and there is no buffer device, so the recovery process is very unstable and the success rate of recovery lower.

The retrievable skewer and its recovery tools include a builder and a seat seal anchor device. The shaft of the seat seal anchor device is a central tube with a strip hole, and the builder body is axially pierced with a hollow short joint. The upper end of the throwing short joint is threaded with an upper joint, and the center tube is equipped with a sealing tube with a strip hole in the middle of the contact surface. One end of the sealing tube is closed, and the other end is connected to the lower end of the throwing short joint; the upper end of the italic body is sideways A recovery through hole is provided, and the inner diameter of the end of the central pipe close to the end of the short joint is enlarged and the inner wall is provided with a recovery thread one.