METHOD FOR OPERATION OF OIL DIRECTIONAL WELLS AND WELLS WITH SIDE SHAFTS Russian patent published in 2019 - IPC E21B43/00 F04B47/02 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil industry and can be used in production of oil from oil directional wells and wells with side shafts sucker-rod pumping units (SSPU) equipped with cable rods. To implement the method, surface drive with suspension assembly, pump string string, tubing and submersible pump are used. Flexible cable rods are installed at section of set of borehole curvature. Straight-line sections of well shaft are equipped with rigid bars. Speed of piston rod reciprocation when submersible pump plunger is lowered is limited by provision of minimum allowable load at suspension point of rod string equal to total weight of pump rods in well fluid at section of pump string from cable suspension to sealing with flexible rope bar.

EFFECT: increased service life of cable rods and tubing string during operation of oil directional wells and wells with side shafts with the help of sucker rod pumping units.

1 cl, 3 dwg