Answer: Corrosion control units are installed on the fly with the use of a special Corrosion control unit installation and pipeline tie-in device, "Monicor-Probe". Seals used in corrosion control units are rubber rings manufactured according to State Standard (GOST) 9833-73 and rated for 15 Mpa pressure. Seals used in the Device are rated for 4.0 Mpa pressure - the working pressure of the system.

 Answer: A sensor rod is fixed at any level of a pipe's inner surface with the help of a collet closing mechanism, a bypass plug and a lid. It is possible to take samples layer by layer from the flow of oilfield liquids using a sample thief with such mechanism.

 Answer: Our unit is universal, which allows to install sensors for exposition of witness samples and sensors for electrochemical analysis of corrosion (LPR method) at any level of a pipeline section. It also allows to take samples of oilfield liquids. Using bayonet locks instead of tapped fittings (which were prone to clogging with cuttings and sand) made operating the control units much easier.

 Answer: There is. It is very important to pay particular attention to this moment. To avoid damaging the sensor it is recommended to check the results of perforation each time after completing the task. By the end of perforation a pressure sleeve of the tie-in device must be able to move easily up and down; a drilling bit must not get jammed at any angle during drilling.

 Answer: Our sensors have a sulfide short circuit protection (cone-type). As a matter of fact, these sensors have not required cleaning so far. The cleaning is necessary when a specific fast growth of corrosion speed is detected. Thus, it can be determined and programmed as a signal to a dispatcher notifying about a necessity of cleaning a sensor from a sulfide buildup. It is recommended to replace the sensor if its surface area reduced by 10 per cent. You can determine when it is necessary to replace the sensor by observing its average corrosion rate.

 Answer: The system operates when a sensor is placed in a water phase. If we miss the water phase, it means that we've missed the sensor installation location, and, most likely, there won't be any corrosion there. There is also a possibility that the water phase is very thin there and corrosion is possible. This is the most troublesome case, but then our task is to find an area where the water phase is appr. 3 cm from a bottom generatrix, by means of calculations or according to the data of thickness gaging.

 Answer: The cost of the sensors remains the same - from 12,000 to 25,000 rubles.