There are remaining recoverable reserves in the oil fields of the Perm region, which are unprofitable to develop by the traditional construction of wells (production string diameter - 168 mm) due to the high cost of building. To involve such reserves in the development it was suggested to use the construction of small diameter wells (SDW) with a changing of the traditional design in the direction of reducing the diameter of the production string. According to the results of drilling the cost is reduced up to 25 %. Despite the many advantages, the SDW design has the essential drawback - there is no reliable technology of the sidetrack drilling. That''s why some changes in the SWD structure, which allow to drill of a sidetrack with a kickoff in a technical column and, as a consequence, to save additionally of 24 % of the cost of the new SDW was suggested. Also the economic calculation was made.

Design was prepared and drilling technology of multilateral wells was tested on the Shagirtsko-Gozhanskoye oilfield, oilfield behalf of Arhangelskoye and Nozhovskoye oilfield in Perm region. In the process of well construction new technologies were developed and introduced.

The experience of eliminating high-intensity drilling fluids losses in fractured rocks in the Perm region fields was hight-lighted. The properties of foam cement insulating material, technology and conditions of its application were described. Results of using foam cement insulating material 6 wells are given.

The basic kinds of plugging materials and wells cementation technologies, developed in PermNIPIneft LLC laboratory of wells casing, are considered. It is noted, that constant authors support allows to increase quality of works considerably.