Downhole Liquid Level Monitoring
Downhole Liquid Level Monitoring
It is very important to monitor the downhole liquid level while lost circulation during the drilling and workover and completion operation, many oil man do not concern downhole liquid level depth, they do not know the important of downhole liquid level depth, this liquid level is up or down under ground according to downhole gas or oil or pressure of formation, it will cause well flow or kick off; other seldom people use the traditional method by firing a bullet or nitrogen to monitor the liquid level, this traditional technology is often used in oil production (pump jack, ESP), but it can not be directily used in lost circulation because the BOP of drilling and workover and completion operation is opened to air, Christmas tree is closed, so it is more difficult to monitor the level while lost circulation than oil production, because open hole will be disturbed by noise of drill rig or workover rig.
LLT-2 down-hole liquid level monitoring system
It is very important to the well control safety for discover the overflow quickly and accurately in the process of drilling or workover operation. But now all the level monitoring is carried out in the mud tank. Because the basal area of the mud tank is large and the liquid flowing from the wellbore to the mud tank will go through a long channel, so the level change in the mud tank will always be later than the overflow occurs in the wellbore. Therefore, it is the fastest way of discover the overflow by monitor the liquid level within the wellbore directly. In addition, there is still no good way to monitor the downhole level of wells when lost circulation happens.
The LLT - 2 down-hole liquid level monitoring system, the company patented technology, can be used to discover the overflow in time and alarm through monitoring the downhole level within the wellbore in the cases such as tripping or treaty lost circulataion .
The system has the following advantages:
1.Monitoring the downhole liquid level online
2.discover the overflow quickly without mud flow out to surface, so as to save time for control the overflow and treat the kick off
3.help the drill man Keep a reasonable liquid height to balance the formation pressure without waste too much mud, save the mud and save money in tripping ;
4.Adjust new mud density to set new circulation without treat the lost circulation with bridge material or cement slurry.
