SECTIONAL PUMP WITH ARTICULATED JOINT Russian patent published in 1998 - IPC

FIELD: construction and manufacture of submersible centrifugal pumps for oil recovery from crooked and inclined wells. SUBSTANCE: lower end of pump upper section is provided with spherical member and upper end of lower section is provided with spherical seat for locking with spherical nut. Spherical member is provided with two circular grooves fitted with rubber seals and seats for keys used for limiting the angle of turn of sections relative to longitudinal axis of pump. Articulation of output end of shaft of upper section with output end of shaft of lower section is effected by means of articulated coupled which is secured immovably on output end of shaft of upper section and movably on output end of shaft of lower section. EFFECT: enhanced tightness of articulated joint; limited angle of turn of sections relative to longitudinal axis of pump. 2 dwg