IMPROVEMENT OF DRILLING EQUIPMENT FOR MULTI-STAGE HYDROFRACTING OF FORMATION

Abstract

The need to increase the efficiency of field development leads to the development and implementation of new, more effective and economically feasible methods of intensification of inflow and increase of oil yield. One of these methods was hydraulic fracturing (fracking). According to the definition, this is a mechanical method of impact on a productive layer, in which a liquid is injected into the thickness of the layer under high pressure, which leads to the rupture of rocks, the formation of new cracks of high permeability and the expansion of existing ones. The liquid with which the operation is carried out is called fracturing fluid. To prevent the cracks from closing after removing the fluid and depressurizing, a special wedging (fixing) material is pumped into the well - proppant, which, depending on the requirements, has a different fractional composition and manufacturing material.