Extendable universal pipeline

Abstract

The invention relates to an extendable universal pipeline for fracturing. The extendable universal pipeline comprises a concave head, a spherical sealing ring, a spherical nut, a ball head sleeve, a piston sealing ring and a ball head shaft, and the inner spherical surface of the spherical nut clamps the ball head sleeve and the ball head of the ball head shaft separately, is screwed and fixed together with an external thread of the concave head and forms a spherical hinge structure with the inner spherical surface of the concave head. The ball head sleeve and the ball head shaft are connectedtogether through threads, and the axial length between the ball head sleeve and the ball head shaft can be adjusted through adjusting the screwing length of the threads. When one or more sets of pipelines are used for connecting two sets of large-drift-diameter high-pressure manifolds in series, only the center and distance of the high-pressure manifolds need to be roughly adjusted, all flanges are easily connected in a butt joint mode and installed through stretching, twisting and rotating all joints of the pipelines, the installation difficulty is greatly reduced, the installation period isshortened, the efficiency is improved, and the cost is reduced.

Description

technical field [0001] The invention belongs to the petroleum and natural gas industry, in particular to the connection technology of a large-diameter high-pressure manifold in downhole fracturing operations, and is precisely a telescopic universal pipeline. Background technique [0002] During the fracturing operation of oil and gas wells, multiple fracturing equipments are required to pump out high-pressure liquid at the same time, gather together through one or several sets of high-pressure manifolds, and then drive it downhole to expand formation fractures. Today’s horizontal well fracturing operations, especially shale gas fracturing operations, require more and more pumping power for fracturing units. Generally, dozens of fracturing equipment will operate side by side at the same time, and flanged hard pipelines are required. Connect the high-pressure manifolds with a diameter greater than 130mm in series and use them together. When flange hard pipelines are used in s...

AI Technical Summary

Problems solved by technology

When flange hard pipelines are used in series, the central coaxiality requirements of two adjacent sets of high-pressure manifolds are very high, and the coaxiality must be within 2mm, otherwise the flange bolts cannot pass through, but the site ground is mostly sandy soil The bedding is covered with a layer of thick steel plate or steel pipe row, the flatness is extremely poor, and the large-diameter high-pressure manifold is generally about 7 meters long and weighs about 6 tons, which is very cumbersome and can only be adjusted bit by bit by using a large crane and a human crowbar. , sometimes it takes even a day or two to install two sets of large-diameter high-pressure manifolds, which is very inefficient and delays the entire fracturing progress

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