A High-Pressure Seal Flushing Tube Adaptable to Axial and Radial Offset

Abstract

The invention discloses a high-pressure sealed flushing assembly capable of axial and radial offsets, including an upper joint, a pressure plate, a floating device, a pre-tightening nut, a static ring, a moving ring, a lower joint and other auxiliary sealing rings; The floating device includes a central tube, a pressure-bearing floating body, and a built-in spring. The floating device realizes a certain range of radial and axial floating through the arc surface of the central tube and the cooperation of the pressure-bearing floating body and the central tube; the pressure-bearing floating body The wing plate can effectively realize the anti-rotation of the floating device, and can pre-tighten the built-in spring under the push of the pre-tightening nut to provide sufficient elastic compensation for the flushing tube; the static ring, the moving ring and the lower joint are arranged under the pressure-bearing floating body; A good mechanical seal end face can be formed between the static ring and the moving ring; the present invention is characterized in that: the structure is simple, it can adapt to a certain degree of axial and radial offset of the drill pipe during drilling operations, and reduces the radial and radial displacement of the drill pipe during operation. Risk of axial float squeezing the inside of the flush tube causing seal failure.

Description

technical field [0001] The invention relates to a high-pressure sealed flushing pipe for oil and gas drilling mud channels that can adapt to axial and radial offsets, in particular to a flushing assembly for sealing the dynamic and static joints on a drilling faucet, a power faucet or a top drive. into a device. Background technique [0002] The pipe flushing assembly is one of the important parts of oil and gas drilling rigs. It is connected to the gooseneck at the top and the center pipe that rotates relative to the gooseneck at the bottom to form a channel for the circulation of drilling fluid and transport the high-pressure drilling fluid to the bottom. The drill string and the drill bit delivered to the bottom of the well are the key dynamic and static "nodes" at the intersection of the drilling rig's circulation system, rotating system, and hoisting system, and its sealing performance directly affects the operating efficiency of the drilling rig. [0003] Existing pip...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of complex installation and disassembly of the existing mechanical seal flushing pipe assembly, poor radial floating adaptability of dynamic and static structures, high coaxiality requirements for installation and operation, and insufficient spring compensation force

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