Translation. Region: Russian Federation –
Source: Novosibirsk State University – Novosibirsk State University –
Employees Center for Technology Transfer and Commercialization of Novosibirsk State University (CTTC NSU) together with colleagues Faculty of Mechanics and Mathematics of NSU patented two innovative methods for cleaning wells from asphalt-resin-paraffin deposits (ARPD), which are formed during the operation of wells. In the first version, cleaning is carried out with the help of service companies, while oil workers can use the second method themselves.
Almost all Russian companies periodically face the need to remove heavy oil fraction deposits from wells, which significantly complicate the extraction of oil and gas.
The standard method involves immersing a heating device into the well, which is connected to a special power cable and melts the plug like a boiler, but it requires a long supply of high current to heat it up. This technology requires the use of extremely expensive equipment, which is practically no longer supplied to our country today.
The solutions patented by NSU are based on a burner created by Professor of the Hydrodynamics Department of the MMF NSU, Doctor of Physical and Mathematical Sciences Sergey Sukhinin and a chemical composition for it, which provides a combustion mode that effectively removes deposits without damaging the pipe itself. We have previously talked about this invention, and now ready-to-use technologies based on it have been patented.
— The first solution is designed for service companies, it involves immersing a burner into a well on a regular geophysical cable, which is often used when working at oil and gas fields and is always available. This significantly reduces the cost and simplifies the cleaning procedure. In the second version of the technology, instead of a cable, special rods are immersed into the well, which ignite upon reaching the required depth and burn out the plug. Oil producing companies can use this method themselves, — said Deputy Director of the NSU CTTC, PhD in Engineering Andrey Savchenko.
Patented technologies also have other advantages over known technical solutions. The combustion temperature is calculated in such a way as to guarantee the burning of paraffins that have formed the plug, and the combustion itself is directed downwards in the well so that the combustion products rise up together with the gases from the well. As a result, it is possible to avoid a situation where the melted plug thickens again in another section of the well (which periodically happens with standard cleaning methods), forcing oil workers to repeat the procedure again. This is especially important when it comes to removing extended plugs, which can be tens and hundreds of meters long.
— Today, the technology has already attracted great interest, both its variants, both for service and for the mining companies themselves, including quite large players in this market. And now we are negotiating pilot projects for its testing in real conditions, — summed up Andrey Savchenko.
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