Azerbaijan Republic is known as an oil country and therefore, petroleum machinery plants play a significant role in its economy. In the period of former Soviet Union, Azerbaijani machinery plants manufactured a great number of products providing all oil regions and countries in the Soviet Union with the output of machinery. Thus, 75−85 % of machinery demand of socialist countries was satisfied by Azerbaijan. The preparation of specialists, as well as production of high quality oil field equipment was carried out in petroleum machineries. However, the breakup of Soviet Union influenced this sphere of industry as well. Beginning from 1990s with the breach of economic relationships, existing markets were lost and this industrial area fell into a decline. After our Republic gained independence, the transition to market economy took place, a number of reforms and privatization carried out. Specifically after these measures, such public corporations as “Baku Steel Wire”, “Baku oil field equipment” and “Neftegazmash” open joint-stock companies were established. The enterprises mentioned were inaugurated to satisfy the demand of petroleum industry of Azerbaijan in oil field equipment, but they still do not function in total capacity. Alongside with it, professional staff is formed in these enterprises, necessary equipment installed and efficient activity goes on. The paper analyzes production and output, as well as the aspects affecting the level of product in mentioned joint-stock companies of petroleum machinery, the ways of increasing the efficiency of their activity marked.