Specialists of OKB Zenit JSC in the first quarter carried out 192 work on the lowering of the liners, which is 29% more than in the same period of 2018.

The largest amount of engineering support work was carried out on hydraulic fracturing. 160 works were carried out. The dynamics and structure of engineering support for the first quarter of 2019 are presented in the figure below.

Most of the work (32.2%) was performed for Samotlorneftegaz. The structure of work by customers is shown in the figure below.