O. Andreev: Orenburg department on production enhancement and well service applies CT unit M-20, produced by Fidmash. It was bought in December 2002 and tried at Orenburg gas and condensate field.  M-20 unit is used to perform such jobs as mud-and-salt plug washout in CT strings, intensification of flow with acid, elimination of asphalt, resinous and paraffin deposits in CTY strings, flow intensification with special agents in drains of oil and gas condensate fields and further  fluid displacement from drains, geophysical studies of  drains, development with foam systems. We pump not only acids, but also blocking agents based on foam stapler and foamed with nitrogen.

O. A.: We managed to perform a very interesting operation this year. We got rid of a salt plug in tubing that couldn't be destroyed by hydraulic fragmentation. Whatever we tried, nothing helped to destroy that salt. We even used acid treatment. But everything was in vain. The salt wouldn't respond to any treatment. Finally we decided to destroy it with the help of a downhole drilling motor. I designed a special cutter. The construction was based on a jet nozzle, in which furrows were cut with the help of welding and an angle grinder. Teeth were fixed and welded into these furrows. We joined this self-made cutter to the downhole drilling motor and the salt was destroyed.

 

O.A.: On the whole we are satisfied with the range of equipment we can order and buy. But situations happen, when the needed instrument just doesn't exist. In such case we have to think out.

 

O.A.: Probably. That is why in the offing our firm is going to sign a treaty with Weatherford, a famous producer of downhole instrument. It opened a representative office in Orenburg, which specializes in downhole equipment both for bucket rigs and CT units. We will be choosing the necessary instrument by catalogue and order it and Weatherford will carry out the delivery and service.

 

O.A.: Gazprom Yugpodzemremont has 4 subsidiary companies in Ukhta, Astrakhan, Krasnodar and Orenburg. All of them are working in unique climatic and geological conditions quite different from each other. Our division is located in Orenburg, where we perform our operations. But if the administration orders to go to Ukhta or Astrakhan, we will be there with our unit. By the way, the other subsidiary companies have no CT units. Our М-20 is the only one. And our division is unique in this aspect.

 

O.A.: The answer is affirmative taking into account that we've been using it for 6 years. When we got it, the plant had just started out. That is why we couldn't avoid difficulties on the first stage but finally succeeded due to the help of Fidmash service. The units Fidmash has been producing after it joined the NOV Group are very reliable. They have better injectors, hydraulic pulsers and cylinders. However the price has augmented as well. Our unit works well and performs a wide range of operations in complicated conditions of seasonal inland climate.

 

O. A.: We would like to have a fleet alongside coiled tubing equipment. We are also in need of a good nitrogen system to develop the wells with nitrogen production coefficient of at least 20 m ³/min and an arrangement for paraffin removal.  We need a mobile nitrogen unit. Moving the equipment on the trawl and unloading it with the help of a lifting crane is prohibitively expensive. And only 2 persons are required to serve a mobile nitrogen unit: an operator and his aid. Such unit arrives at the well and immediately starts pumping nitrogen. I'd like to add that we need not a unit that adsorbs nitrogen from the air, but the one that turns liquid nitrogen into gas. In Orenburg there is a possibility to fill liquid nitrogen. We'd also like to have a system for warming up oil and deleting asphaltens.

 

 

O.A.: This is a matter of our financial ability. It is very pleasant to use high quality equipment of the leading producers from abroad, no matter how patriotic we are. We are also waiting for a new unit of NOV Fidmash. The products of this company correspond to the world standards. Yet the prices rise proportionally to the quality, and not every service company can allow purchasing the best equipment. Paradoxically, in Russia, which has large volumes of natural raw, a company that provides its excavation, has to economize on means of production. I think this is rather a problem of politics.

 

O.A.: At the moment we study a possibility of inflow water isolation by pumping guar resin. The technology was created by Khimeko-GANG, our steady partner. This company also supplies us with chemicals. We'd also like to do selective treatments: pumping acid in mid interval to isolate upper and lower with the help of packers. It will be pumped with further pressure release and packer recovering.

 

O.A.: New technologies and practical application of equipment and instruments. For instance, I'd like to learn more about running guns on tubing, flush-joint long-length pipe perforation, and installation of packers for acid treatment. And, of course, I'm interested in resin injection through flush-joint long-length pipe for isolation of water flow. We are interested in everything that can help us in practice.