Sealing detection device and method of one-way valve

Abstract

The invention provides a device used for detecting a sealing capability of a one-way valve of a cement type float collar and float shoe. The device comprises a rack, and a vacuum pump, a reversing valve, a negative pressure meter and a one-way valve seat which are mounted on the rack and connected in sequence. The one-way valve seat has a top end part capable of receiving a one-way valve to be detected in a sealing manner, and an inner cavity connected with the negative pressure meter. The reversing valve has at least three positions. When the reversing valve is located in the first position, an air channel between the vacuum pump and the one-way valve seat is cut off, and the vacuum pump and the one-way valve seat are communicated with outside air respectively. When the reversing valve is located in the second position, the air channel between the vacuum pump and the one-way valve is communicated. When the reversing valve is located in the third position, the air channel between the vacuum pump and the one-way valve seat is cut off, and the vacuum pump is communicated with outside air while the one-way valve seat is not communicated with outside air. The invention also provides a corresponding method for using the device to carry out detection.

Description

technical field [0001] The invention relates to a device and a method for detecting the sealing ability of a one-way valve, which can be especially used in cement type floating hoops and floating shoes for oil field cementing operations. Background technique [0002] In oilfield exploitation, the pressure-bearing and sealing performance of cement-type floating hoop shoes is very important to ensure the smooth progress of cementing operations. The check valve is the core component of the cement type floating hoop shoe, and its sealing ability directly affects the performance of the product. Therefore, it is necessary to test the sealing ability of the one-way valve. [0003] The current detection method is to fix the one-way valve with cement in the casing of the cement-type floating hoop and the floating shoes, and then carry out integral pressure test on the finished floating hoop and floating shoes. Among them, one end of the shell is closed and connected to a pressure t...

AI Technical Summary

Problems solved by technology

However, since the one-way valve cannot be taken out from the casing after being fixed with cement, if the one-way valve fails during the pressure test, the entire set of floating hoops and floating shoes will be rendered useless, resulting in great waste

In addition, due to the large volume and heavy weight of the cement-type floating hoop shoes, the detection process is slow and cumbersome

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