FIELD: oil industry.
SUBSTANCE: pump comprises stepped flowing passage provided with the seat interposed between the stages, outlet from the diffuser, and passages for supplying fluid to be pumped from the well. The passages for the supplying active agent are in communication with the space downstream of the pipe. The stepped passage receives sealing unit and locking insert. The locking insert is provided with through step passage having the seat and by-passing openings through which the supplying passages and output from the pump diffuser are in communication with the passage with locking insert. The autonomous instruments are secured to the locking insert from below. The bearing ring underlies the seat in the axial through passage with the locking insert. The by-passing openings in the locking insert are connected with the supplying passages.
EFFECT: enhanced reliability and efficiency.
2 cl, 3 dwg
