Adjustable connecting device suitable for manifold connection

Abstract

The invention discloses an adjustable connecting device suitable for manifold connection. The device comprises a connecting flange I, wherein the upper end face of the connecting flange I is fixedly connected with a flat valve, and sealing between the connecting flange I and the flat valve is achieved through a metal sealing backing ring embedded in the upper end face of the connecting flange I; the lower end face of the connecting flange I is connected with the lower end flange face of a connecting flange II through an adjusting stud and an adjusting nut, an adjusting drive sleeve is embeddedin the lower portion in the connecting flange I, the upper portion of the connecting flange II extends into the connecting flange I and is fixedly connected with the connecting flange I through the adjusting drive sleeve, and an inner metal sealing ring and an outer metal sealing ring are embedded in a gap among the connecting flange I, the connecting flange II and the upper end of the adjustingdriving sleeve to realize sealing; and a connecting stud hole connected with an outlet of a three-way valve block is formed in the lower end flange face of the connecting flange II, and the length ofa joint can be adjusted according to the distance between manifold valves and the deformation amount needed by sealing extrusion deformation of the flange metal backing ring.

Description

technical field [0001] The invention belongs to the technical field of oil and gas drilling and production manifold connection equipment, and relates to an adjustable connection device suitable for manifold connection. Background technique [0002] In the process of oil and natural gas drilling, once the mud in the wellbore is impregnated by the formation fluid, the hydrostatic column pressure of the mud will be lower than the formation pressure, resulting in overflow. At this time, it is necessary to adjust the well control system manifold. The valve controls the back pressure and maintains a stable bottom hole pressure. [0003] The manifold of the well control system is mainly composed of plate valves, valve blocks and flange nipples. During the field operation, due to the high fluid pressure of the manifold, usually above 35MPa, flanges are generally used for the connections between the manifold interfaces. Metal backing ring sealing form, the sealing needs to produce a...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an adjustable connection device suitable for manifold connection, which solves the problem that the conventional flange sub-joint connection in the prior art needs to be welded on site, which is time-consuming and laborious, and there are certain safety hazards, which cannot be accurately Satisfy the problem of sealing connection of flange metal gaskets at both ends

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