Abstract: A Y-shaped packer includes a supporting part, fixedly sleeved on the outer wall of the inner barrel; a plugging part having an inner end part connected with the outer wall of the supporting part, and an outer end part tilted upward so that an angle between the plugging part and the supporting part is an acute angle; an expansion seal connected with the supporting part. The expansion seal is located above the plugging part. The Y-shaped packer is arranged in an annular gap between an outer barrel and an inner barrel. Through the combination of the supporting part arranged obliquely and the expansion seal arranged above the supporting part, the invention-shaped packer can realize the effect of secondary sealing on the gap between the outer barrel and the inner barrel.

Abstract: A tower packer for packing cement slurry of a jacket is disposed between a steel pile and an inner sleeve. It includes a supporting ring, sealing rings and a limiting ring. The supporting ring and the limiting ring are respectively installed on an outer surface of the inner sleeve in the steel pile. A plurality of sealing rings stacked from top to bottom along the sleeving direction of the inner sleeve are arranged between the supporting ring and the limiting ring. Each sealing ring is hermetically and slidably connected along a radial direction. The sealing ring at the bottom is always supported by the supporting ring. The sealing ring at the top abuts a lower surface of the limiting ring. When the inner sleeve is sleeved into the steel pile, the outer surface of the sealing ring with maximum outer diameter hermetically abuts the inner surface of the steel pile.

Abstract: A tower packer for packing cement slurry of a jacket is disposed between a steel pile and an inner sleeve. It includes a supporting ring, sealing rings and a limiting ring. The supporting ring and the limiting ring are respectively installed on an outer surface of the inner sleeve in the steel pile. A plurality of sealing rings stacked from top to bottom along the sleeving direction of the inner sleeve are arranged between the supporting ring and the limiting ring. Each sealing ring is hermetically and slidably connected along a radial direction. The sealing ring at the bottom is always supported by the supporting ring. The sealing ring at the top abuts a lower surface of the limiting ring. When the inner sleeve is sleeved into the steel pile, the outer surface of the sealing ring with maximum outer diameter hermetically abuts the inner surface of the steel pile.