Drilling fluid level monitoring device

Abstract

The invention discloses a drilling fluid level monitoring device, and relates to the technical field of safety measurement. The device comprises a reverse beam and a ground anchor fixed to the reversebeam; a fixing hole is formed in the reverse beam, a detecting mechanism is inserted in the fixing hole, the detecting mechanism includes an outer sleeve slidably inserted into the fixing hole and aninner sleeve inserted into the outer sleeve, and the upper end of the inner sleeve is connected with a first electrical connection line; a second electrical connection line is inserted into the innersleeve,the second electrical connection line is located at the center of the inner sleeve, and the lower end of the second electrical connection line is connected with a loop trigger; a voltmeter isdisposed between the first electrical connection line and the second electrical connection line. The device can effectively detect the level height in a well, have accurate measurement, simple structure, low cost and convenient use, and can be used forlevel monitoring or other fields requiringwellbore sealing.

Description

technical field [0001] The invention relates to the technical field of safety measurement, in particular to a drilling fluid level monitoring device. Background technique [0002] During construction, lost circulation in drilling, lost circulation in well trial workover and workover of low pressure coefficient wells, when the wellbore fluid column pressure is greater than the formation pressure, the mud in the wellbore will flow into the formation and cause lost circulation. Therefore, it is necessary to Real-time monitoring of the liquid level in the wellbore can clearly grasp and judge the dynamic change of the depth of the downhole liquid level, thereby effectively reducing the well control risk during drilling and well trial workover operations. [0003] In building construction, drilling, well trial and workover operations, due to lost circulation, it is impossible to accurately measure the wellbore liquid level. The approximate depth of the liquid surface is usually i...

AI Technical Summary

Problems solved by technology

This traditional measurement method uses manual measurement. Due to the vibration and improper operation of the traces of the liquid left on the pipe string in the well, it is impossible to accurately grasp the true position of the liquid level in the wellbore.

Especially when the liquid level in the well is very deep (for example, more than 500 meters), because the whole process of engineering construction takes a long time, the time interval between the survey period and the construction period of the site is relatively long, and the water level in the survey period may fluctuate during construction. The method cannot know the current depth of the liquid level in the wellbore and often cannot be accurately known

Images