Tool Introduction

The cut-off type reverse circulation valve is the simplest and most commonly used type of reverse circulation valve. The joint is equipped with a cut-off plug with a sealing ring. When reverse circulation is required, a punch rod is inserted from the wellhead to break the two cut-off pins, forming two reverse circulation channels; In order to collect the punch rod, there is a connecting rod joint under the reverse circulation valve, which can collect the punch rod and the broken pin inside without affecting the flow of liquid.

Structural characteristics

① The tool design is simple and effectively reduces the complexity of the testing column;

② Easy to operate, open the circulation channel through the throw rod.

operation

After the test is completed, when reverse circulation is required, a punch rod is inserted from the wellhead to break the two broken pin plugs with sealing rings inside the reverse circulation, forming two channels for reverse circulation well killing.

technical parameter