Casing hanging type thermal recovery casing head

Abstract

The invention discloses a casing hanging type thermal recovery casing head, and relates to the technical field of casing heads. The casing hanging type thermal recovery casing head comprises an oil layer casing, a casing body, a flange joint, a hanger and a slip, wherein first grooves are symmetrically formed in the inner wall of the oil layer casing; a rotating groove is formed in the inner wall of each first groove; the inner wall of each rotating groove is rotationally connected with a magnet; each magnet is fixedly connected with an expansion ball; each expansion ball is filled with a thermal expansion material; one end, far away from the corresponding magnet, of each expansion ball is fixedly connected with a rotating shaft; and the side wall of each rotating shaft is fixedly connected with a driving wheel. According to the casing hanging type thermal recovery casing head, a resonance rod, an elastic air bag, a tuning fork and other structures are arranged, noise vibration is generated when high-speed fluid passes through the oil layer casing so as to drive the tuning fork to vibrate synchronously, the resonance rod is driven to vibrate to extrude the elastic air bag, the elastic air bag extrudes air pumped from the outside into a rubber ring, so that the rubber ring is expanded when the fluid passes through the rubber ring, gaps between parts are extruded and filled, and the sealing performance of the casing head is further improved.

Description

technical field [0001] The invention relates to the technical field of casing heads, in particular to a casing hanging type thermal recovery casing head. Background technique [0002] Casing head, which is used to fix the wellhead of the drilled well, connect the wellhead casing string, support the gravity of technical casing and oil layer casing, seal the annular space between each layer of pipes, and install blowout preventers and tubing heads. , the Christmas tree provides a transition connection, and through the two side ports on the casing head body, construction operations such as re-squeeze mud, monitoring and filling of balance fluid can be carried out. [0003] With the development of thermal recovery of heavy oil, the performance requirements of the casing head are higher. It is necessary to pass hot steam with a temperature of about 300°C and form a pressure seal between the inner and outer strings. The pipe is heated and elongated under the action of high temper...

AI Technical Summary

Problems solved by technology

[0003] With the development of thermal recovery of heavy oil, the performance requirements of the casing head are higher. It is necessary to pass hot steam with a temperature of about 300°C and form a pressure seal between the inner and outer strings. The pipe is heated and elongated under the action of high temperature, which makes the surface casing move and adversely affects the later oil recovery operation

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