PRESSURE STABILIZER Russian patent published in 2000 - IPC

FIELD: dampening pressure fluctuations in oil well tubing in handling the working medium by means of well pumps. SUBSTANCE: pressure stabilizer includes perforated central pipe line with connecting branch pipes; this pipe line is embraced by casing forming expansion cavity where dampening members in form of flexible pipes are arranged; these sections are blanked off at the ends and are mounted in succession along central pipe line. Blanked-off ends of sections are secured in rigid rings at clearances between ends of adjacent sections. Flexible members are located in these clearances. Rings are freely fitted on central pipe line and are rigidly connected by means of couplers. Flexible pipes have oval section; end lengths of their sections have cross section in form of circle; cavities of flexible pipes are filled with elastodampening material. EFFECT: improved dampening properties of flexible pipes due to free axial deformation. 7 cl, 2 dwg