Patent ID: 8757257

Claim:
A downhole crown-shaped separating device for separating oil and water, comprising an oil pump joint ( 1 ), a coupling collar ( 2 ), a tube joint ( 3 ), a central tube ( 4 ) and a well-flushing valve ( 5 ) which are fixedly connected with one another from top to bottom in sequence; wherein said central tube defines a longitudinal axis and has an uppermost end and a lowermost end, wherein the crown-shaped separating device further comprises N sections of separators ( 6 ) sleeved on the central tube ( 4 ), and N+1 separator joints ( 7 ) sleeved on the central tube ( 4 ) sequentially from top to bottom, N being a natural number, one section of the separator ( 6 ) being provided between two adjacent separator joints ( 7 ), wherein each section of separator ( 6 ) includes: an upper locating sleeve ( 8 ), a lower locating sleeve ( 9 ), a plurality of sedimentation cups ( 10 ) sleeved on the central tube ( 4 ) sequentially from top to bottom, in which two neighboring sedimentation cups ( 10 ) are nested into each other and form a gap between them, the uppermost sedimentation cup ( 10 ) on each section of separator ( 6 ) being fixedly connected to the central tube ( 4 ) by the upper locating sleeve ( 8 ), and the lowermost sedimentation cup ( 10 ) on each section of separator ( 6 ) being fixedly connected to the central tube ( 4 ) by the lower locating sleeve ( 9 ), and a plurality of ribbed separating bowls ( 11 ), each sedimentation cup ( 10 ) being provided with a ribbed separating bowl ( 11 ) embedded therein, wherein the sedimentation cup ( 10 ) is crown-shaped and has a middle part, an upper edge, and a multi-ribbed polygon bottom ( 10 - 1 ), the rib ( 10 - 1 - 1 ) of which forms an pitch angle (α) of 30 to 60 degrees with a horizontal line perpendicular to said longitudinal axis, and the middle part of the sedimentation cup ( 10 ) is a hollow cylinder, the upper edge of the sedimentation cup ( 10 ) being zigzag-shaped which corresponds to the shape of the bottom ( 10 - 1 ), the sedimentation cup ( 10 ) having a cup holder ( 10 - 2 ) for holding said sedimentation cup which forms an annular space with the central tube ( 4 ), and wherein a group of intake holes ( 12 ) are provided on the central tube ( 4 ) corresponding to the annular space, a bar-shaped gap ( 10 - 2 - 1 ) is opened on the cup holder ( 10 - 2 ) of the sedimentation cup ( 10 ), the ribbed separating bowl ( 11 ) has same shape as that of the bottom ( 10 - 1 ) of the sedimentation cup ( 10 ), the ribbed separating bowl ( 11 ) is provided with several liquid passages ( 11 - 1 ), and the outer diameter of the sedimentation cup ( 10 ) is smaller than that of the separator joint ( 7 ).