Hydraulic multi-time switching circulating valve

Abstract

The invention discloses a hydraulic multi-time switching circulating valve. A channel is arranged on a shell, the left end of the shell is in threaded connection with a first connector, the right endof the shell is in threaded connection with a second connector, the outer surface of the right end of a first mandrel is in contact with the inner surface of the left end of a second mandrel, the first mandrel and the second mandrel are arranged inside the shell together, the outer surface of the left end of the first mandrel is in contact with the inner surface of the first connector, the outer surface of a first shoulder is in contact with the inner surface of the shell, the right end of the first shoulder and the shell form an annular space, a compression spring is arranged in the annular space, the right end of the second mandrel is in threaded connection with a third connector, a clamping block is matched with a first limiting groove to realize the reciprocating motion of the second mandrel in the shell, a second limiting groove is matched with the second connector to realize the staggering and coincidence of the channel and a hole, a nozzle is arranged in the third connector, andthe nozzle is in threaded connection with the third connector. The hydraulic multi-time switching circulating valve has the beneficial effects that the flushing displacement is greatly increased, thebackflow capacity of debris is improved, the risk of encountering resistance is reduced, and meanwhile the operation efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation and equipment, in particular to a hydraulic multiple-time on-off cycle valve. Background technique [0002] In the current drilling and completion operations, vibration tools, screw drilling tools and grinding shoes are often used for drilling and grinding operations. Due to the limitation of the small hole size, the size of the screw drilling tools used in drilling and grinding operations is also small. , while the rated flow rate of the small size screw drilling tool is low, the annular space is small and the screw drilling tool with low flow rate makes the flowback capacity of the debris during the drilling and grinding process low, easy to accumulate, and will increase the jam directly increasing the displacement will make the screw drilling tool overloaded, which will easily cause the rotor of the screw drilling tool to rotate at an overspeed, accelerate the wea...

AI Technical Summary

Problems solved by technology

[0002] In the current drilling and completion operations, vibration tools, screw drilling tools and grinding shoes are often used for drilling and grinding operations. Due to the limitation of the small hole size, the size of the screw drilling tools used in drilling and grinding operations is also small. , while the rated flow rate of the small size screw drilling tool is low, the annular space is small and the screw drilling tool with low flow rate makes the flowback capacity of the debris during the drilling and grinding process low, easy to accumulate, and will increase the jam directly increasing the displacement will make the screw drilling tool overloaded, which will easily cause the rotor of the screw drilling tool to rotate at an overspeed, accelerate the wear and tear, and easily cause the screw drilling tool to be damaged, broken and stuck, etc., increasing the Big Downhole Risk

Images