Core compensated integral base seal casing head

The utility model relates to a core-compensated type seal casing head with an integral base, which belongs to wellhead devices of oil and gas well drilling. The utility model is composed of a conical seat and a conical body, wherein the conical seat is a conical circular body, the upper part of the inner wall of which has a big upper diameter and a small lower diameter; the outer wall of the conical body is a conical circular body which has a big upper diameter and a small lower diameter; the conical body is positioned in the conical seat; the upper part of the inner wall of the conical seat tightly contacts the outer wall of the conical body; side holes which are penetrated up and down, are arranged on the conical body; a hole plug is arranged on each of the side holes. The utility model has the advantages of simple structure, low cost, convenient installation and high stability, besides, the utility model can cause an oil layer casing tube to be automatically centered.