A continuous cycle valve

Abstract

The invention relates to a circulating valve, in particular to a continuous circulating valve. The continuous circulating valve comprises an upper connector, a lower connector, a shell and a valve mandrel. The upper connector is installed at one end of the shell in a threaded mode, and the lower connector is installed at the other end of the shell in a threaded mode. The valve mandrel is arranged in the portion, between the upper connector and the lower connector, of the shell. A flange is arranged at one end of the valve mandrel. The other end of the valve mandrel is sleeved with a valve piston through a check ring A. The continuous circulating valve is simple in structure and good in practicability, working fluid can be supplied to a well bottom rapidly and continuously under the non trip situation, the drilling efficiency can be effectively improved while downhole accidents are prevented, and the problems that the nonworking time is long due to trip and replacement of a non-continuous circulating valve, consequentially the drilling efficiency is reduced, and serious economic loss is caused are solved. The continuous circulating valve is particularly suitable for the operation of well drilling, well completion, oil well maintenance, well flushing, salvage, packer setting and the like.

Description

technical field [0001] The invention relates to a circulation valve, in particular to a continuous circulation valve. Background technique [0002] The petroleum industry is a high-risk industry, and the safe production of oil wells is of great significance. The blowout and stuck accident is the most complicated and serious accident in petroleum exploration and development, and it is also one of the most important factors affecting the safe production of oil wells. harm. In order to prevent the occurrence of accidents such as leak leakage and collapse, continuous circulation valves are widely used in operations such as drilling, well completion, oil well maintenance, well washing, salvage, and packer setting. However, the current continuous circulation valves are limited by the number of cycles Due to the limitation of drilling and replacement of non-continuous circulation valves, long non-working time is caused, which reduces the drilling timeliness and causes serious eco...

AI Technical Summary

Problems solved by technology

In order to prevent the occurrence of accidents such as leak leakage and collapse, continuous circulation valves are widely used in operations such as drilling, well completion, oil well maintenance, well washing, salvage, and packer setting. However, the current continuous circulation valves are limited by the number of cycles Due to the limitation of tripping and replacing the non-continuous circulation valve, the non-working time is longer, which reduces the drilling timeliness and causes serious economic losses.

In order to reduce the non-working time of the existing continuous circulation valve due to multiple pitching and replacement waste, it is urgent to develop a continuous circulation valve

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