Exploitation of directional wells with a packer installed under the zone of permafrost
Background Experience in operating directional wells showed that the installation of a packer above the zone of productive reservoir in the sloping part of the trunk does not provide sufficient sealing the annulus. Aims and Objectives To study the influence of the borehole deviation on the performance of the down-hole equipment and to review the ways of equipping directional wells with underground equipment. To consider the variant of tubing design with the packer located directly under the permafrost zone. Methods The positions of theory of strength. Results Calculations substantiated the possibility of elongated sub-packer stem suspending from the packer. Maximum allowable length of the stem is determined for different sizes of pipes. The way of directional well operation has been developed with the packer in the vertical borehole section located directly under the permafrost zone.