Engineering Physics Annotation << Back TECHNOLOGY OF RECOVERY OF RESIDUAL OIL BY DRILLING WELLS WITH THE DESIGN FEATURES OF THE VALVE ASSEMBLY R.Ya. ABDYUKOVA, L.V. PETROVA, E.R. VALEEV A technology for recovering residual oil by drilling wells using an improved valve assembly of a mud pump is presented. It is shown that the new design makes it possible to obtain a uniform fluid fl ow by changing the seating surfaces, which leads to an increase in oil recovery for the development of hard-to-recover and residual reserves. The expediency of the method of extracting residual oil reserves by increasing the pressure of the drilling fluid based on the use of an improved valve assembly of a mud pump is substantiated. Keywords: oil production; residual oil reserves; piston pump; hard-to-recover reserves. DOI: 10.25791/infizik.6.2023.1338 Pp. 49-54.