Sand production in Oil and Gas wells is one of the most challenging factors an operator faces during production. Going subsea, safety issues in conjunction with the need to produce as much as possible per well, makes the selection of a subsea monitoring system even more important.
Principle of operation
The ultrasonic signal is transmitted through the pipe wall and picked up by the acoustic subsea sensor. In the patented “Intelligent” ClampOn sensor the signal is processed internally by a DSP engine and filtered before being sent digitally and/or analogically to the topside computer or control system (no Calculating Interface Unit required). Here the user can monitor and evaluate the data in real time and make the required decisions for profitable production.
Sand production in oil and gas wells is a serious issue for oil and gas producers. The challenge is not merely to avoid sand production, but also to increase commercial well productivity, as even small quantities of particles in the well flow can cause significant damage. As an operator you are interested in maximum production and profit from your wells, no matter what technology you use. Operators all over the world have made ClampOn their preferred supplier of sand monitoring systems, due to the patented technology that turns their wells into profit generators.
The ClampOn DSP Subsea Particle Monitor incorporates a new filtering technique that makes the sand detector an extremely useful tool for analyzing the true nature of sand production, helping to control it and finally, increasing the profit from the well! This filtering technique is the result of integrating our experience of thousands of wells, analyzing data, and using the results to enhance the technology used in our ClampOn DSP Subsea Particle Monitor.
The enormous capacity of the DSP sensor (the only one on the market) makes it possible to scan through a frequency range of 1 MHz 128 times per second. This illustrates the capacity of our technology and of the filtering technique that is at the core of acquiring and processing sand data.
All our instruments are equipped with both digital and analogue interface, and comply with all common protocols. Our instruments can easily be integrated into any existing or new control system. A computer with our software is often used in-between our instruments and the control system. The computer will be used for sand calculation by using the RAW data from our sand detectors and flow data from third party systems, then output calculated sand rate to the control system. All recorded data will also be stored for analyzing and calibration purposes. We always recommend using the digital interface due to following benefits:
Subsea Particle Monitor
Method of operation
Passive acoustics (ultrasonic)
Intelligent DSP electronics inside sensor unit
Method of installation
Non-intrusive, clamped to pipe surface
Minimum particle size*
Oil/water: 25 microns/1PPM
Air/gas: 15 microns/1PPM
Minimum sand rate*
Minimum flow velocity*
Better than 1%
RS485, Modbus, Canbus, SIIS, 4-20mA
Oil, gas, water, multiphase
Onboard Sand Calculation
Max water depth
3048 meters [10000 ft.]
Design lifetime (MTBF)
220 000 hours (25 years)
Bennex or ODI / jumper or bulkhead
ø90 x 324mm [ø3,5” x 12,8”] / 7kg air (5kg water)
12-28VDC, 1.2W (single electronics)
* Depending on flow conditions
All specifications are subject to change without notice.