Tool Introduction

The pitching circulation valve can be used for testing, cycling, and other operations. When used in testing operations, it is generally connected to the upper end of the test valve. After the test is completed, when it is necessary to circulate the formation fluid in the pipe column, a steel ball is inserted from the wellhead. After the ball is seated, a certain pressure is added to the diameter, and the shear pin on the ball seat is cut off. The circulation hole is opened, and the formation fluid in the pipe column can be circulated out.

Structural characteristics

① The working principle of the pitching circulation valve is relatively simple and easy to operate;

② Designed a closed buffer device;

③ The pressure for diameter compression can be set by adjusting the number of shear pins.

operation

When it is necessary to open the circulation hole, a steel ball is inserted from the wellhead. After the ball is seated, pressure is applied inside the diameter, and the ball seat moves downward to open the circulation hole.

technical parameter