What Is a Cannula Gauge?

The casing diameter gauge is composed of a joint and a body. The upper and lower ends are processed with connecting threads, the upper end is connected to the drilling tool, and the lower end is reserved.

Casing Gauge

Right!

The casing diameter gauge is composed of a joint and a body. The upper and lower ends are processed with connecting threads, the upper end is connected to the drilling tool, and the lower end is reserved.

(1) Connect the casing gauge to the downhole pipe string and enter the well. The gauge should be able to pass smoothly. If it is blocked, it means that there is a problem with the downhole casing.

(2) When the tool for running down is long, another gauge can be connected at the lower end of the gauge to lengthen the length of the tool to ensure that the tool can reach the working section smoothly.

(3) During the ground diameter test, there shall be no foreign matter in the pipe and it shall be properly supported to prevent the pipe from sagging so that the gauge can pass freely.