Spindle type metal sealing and metal framework type rubber sealing sleeve hanger

Abstract

The invention discloses a spindle type metal sealing and metal framework type rubber sealing sleeve hanger, which comprises a primary seal and a secondary seal, wherein the primary seal and the secondary seal are arranged on the external circumference of a hanger body. The primary seal is structurally characterized in that: a primary seal pressing plate, a metal frame type double-V-shaped sealing ring, a spacer ring, an X-shaped metal sealing piece and a primary seal supporting ring are sequentially arranged on a table surface which faces a small-end port of the hanger body; a nut is arranged at the external end of the primary seal supporting ring; spacer ring O-shaped sealing rings are arranged on internal and external surfaces of the spacer ring respectively; and a radial through hole is formed in the middle of the spacer ring. The secondary seal is structurally characterized in that: a screw thread pressing plate, a screw pressing plate, a double-V-shaped sealing ring and a secondary seal supporting ring are sequentially arranged on the table surface which faces a large-end port of the hanger body; the double-V-shaped sealing ring is positioned between the hanger body and an integrated sleeve head body; and a screw is inserted into spindle holes of the screw pressing plate, the double-V-shaped sealing ring and the secondary seal supporting ring. The spindle type metal sealing and metal framework type rubber sealing sleeve hanger is good in sealing effect and long in service life.

Description

technical field [0001] The invention belongs to the technical field of petroleum drilling and relates to a mandrel type metal seal plus metal skeleton type rubber seal casing hanger. Background technique [0002] A complete set of wellhead equipment is mainly composed of three parts: casing head, tubing head and oil (gas) tree. When drilling, the blowout preventer is installed on the casing head to form the drilling wellhead device; when the well is completed, the oil (gas) tree is installed above the tubing head to form the oil production (gas) wellhead device. Among them, the main function of the tubing head is to hang the tubing and seal the annular space between the tubing and the casing; the main function of the Christmas tree is to switch, control and guide the oil flow and hang the tubing; the function of the casing head is to connect the surface casing, Multiple layers of casing in a suspended well, the annular space between the casings. The whole device needs to m...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a mandrel type metal seal plus metal skeleton type rubber seal casing hanger, which solves the problems of poor sealing effect and short service life of the prior art equipment

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