High-pressure heavy-calibre tapping machine with external independent adjustable pressure balance system

Abstract

The invention relates to a high-pressure heavy-calibre tapping machine with an external independent adjustable pressure balance system. Based on the prior tapping machine, the external independent adjustable pressure balance system forms a pressure balance oil cavity in a sealing way at the position of the rear end surface of a drill rod of the tapping machine, so that pressures acted on upper section and lower section of the drilling rod of the tapping machine are balanced, thereby ensuring the balance of upper pressure and lower pressure of a feed screw nut, (i.e., ensuring that the screw nut does not bear any force). Compared with similar products, the invention has the advantages of simple structure and high controllability, and fills the blank of the tapping machine combined with the characteristics of heavy calibre and high pressure in the world; in addition, the invention can freely adjust the pressure differences of upper pressure and lower pressure of the drilling rod of the tapping machine according to real working pressure, thereby realizing the pressure balance and stabilization of the tapping machine in working. The invention has the advantages of simple operation and good safety and reliability and solves the worldwide difficulty of the lack of the high-pressure heavy-calibre pipeline renovation tapping machine.

Description

【Technical field】 [0001] The invention relates to the technical field of large-diameter high-pressure pipeline maintenance, maintenance and emergency repair equipment, in particular to a high-pressure large-diameter drilling machine with an external independent adjustable backup pressure balance system. 【Background technique】 [0002] With the rapid development of energy production in my country and even in the world, pipelines are playing an increasingly important role in energy transmission under conditions of larger diameters and higher pressures. However, no matter what material is used to construct the pipeline, due to the objective existence of force majeure factors such as settlement, corrosion, and external construction after several years of construction, the pipeline may be damaged during operation, and pipeline maintenance and overhaul are required. And with the development of national urban planning and construction, the existing pipeline renovation project is al...

AI Technical Summary

Problems solved by technology

In the existing drilling machine design system, the medium-sized drilling machine’s backup pressure balance system is balanced by the pipeline medium, but due to the fluctuation of the pipeline pressure, the balance system is also affected, and the work is not stable. At the same time, the built-in backup pressure system is suitable The range is also limited, especially when used in crude oil medium pipelines, crude oil enters the balance system, which often blocks the balance system, resulting in the inability of the drilling machine to work, which will cause personnel, equipment and even major accidents, and the built-in backup pressure balance system contains In the hole drilling machine, it is impossible to freely adjust according to the use requirements

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