公开(公告)号：US20190264544A1

公开(公告)日：2019-08-29

申请号：US16307936

申请日：2017-05-12

申请人： China University of Petroleum-Beijing

发明人： Zhongwei HUANG ,  Jingbin LI ,  Jilei NIU ,  Gensheng LI ,  Zhen CHENG

IPC分类号： E21B41/00 ,  E21B7/04 ,  E21B7/06

摘要： The present invention provides an auxiliary feeding device for a flexible pipe of a radial horizontal well, comprising an oil pipe, a steering gear connected to the oil pipe at a lower opening thereof, and two impellers; an upper end surface of the steering gear is provided with an accommodating groove; the steering gear is internally provided with a through steering passage in an axial direction thereof for allowing an external flexible pipe to pass through; an inlet of the steering passage is located at a bottom wall of the accommodating groove, and an outlet of the steering passage is located at a lower portion of a sidewall of the steering gear; the two impellers are symmetrically disposed on two sides of the inlet; each of the impellers comprises an impeller shaft, a barrel body rotatably surrounding the impeller shaft, and at least three blades fixed outside the barrel body and provided at a top thereof with a notch, wherein the two impeller shafts are parallel to each other; the two impellers are synchronously rotated relative to each other, and the notches on two sides of the inlet are in one-to-one correspondence relation to form a holding passage that can clamp the flexible pipe; the flexible pipe enters the steering passage through the oil pipe, the holding passage, and the inlet in sequence, and protrudes from the outlet; fluid injected through an upper opening of the oil pipe drives the impellers to rotate downward, and causes the flexible pipe to be fed downward. The present invention can enable the flexible pipe to overcome frictional resistance effectively and be fed continuously and stably.