A horizontal well staged fracturing wellhead automatic ball thrower

Abstract

The invention relates to an automatic ball injector for segmented fracture of a well mouth of a horizontal well.The automatic ball injector comprises a hexagon nut, a flange cover, a stud, an upper connector, a fastening screw, a base, a ball injecting mechanism, a lower connector, a seal ring, a fracture ball and a fastening screw hole.The ball injecting mechanism comprises an AC servo anti-explosion motor, a motor frame, a crank, a rotating plate, a rotating disc, a small gear, a rotating disc inner column, a limiting rail, a limiting column, a rotating disc edge column, a rotating plate column, a pressure release hole and a motor rotating shaft.Safety of fracture construction can be improved, operation is easy, work intensity is lowered, work efficiency is improved, fracture production cost can be reduced, safe, efficient and continuous ball injecting is achieved, the yield of shale gas is improved, and the automatic ball injector has a great effect on economical production of shale gas.

Description

technical field [0001] The patent of the present invention belongs to the technical field of petroleum machinery, in particular to an automatic ball thrower for horizontal well staged fracturing wellhead which realizes automatic throwing of fracturing balls at the wellhead for staged fracturing of horizontal wells. Background technique [0002] As a brand-new clean energy, shale gas is gradually becoming a hotspot of global energy development. The exploitation method of shale gas is mainly based on the combination of horizontal well and staged fracturing. Ball-drop fracturing technology is a common fracturing technology for staged fracturing in horizontal wells. Ball-drop fracturing technology is completed by throwing fracturing balls at the wellhead. Fracturing, so the wellhead ball launcher plays a big role in staged fracturing of horizontal wells. [0003] However, at present, there are still many deficiencies in our country's ball throwing device, which are embodied in ...

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Problems solved by technology

[0003] However, at present, there are still many deficiencies in our country's ball throwing device, which are embodied in the following aspects: the structure of the ball throwing device is too complicated, the volume is relatively large, and the operation is time-consuming and laborious; when loading the balls, they need to be loaded one by one, and the efficiency is very low; The number of fracturing balls cast is limited, and multi-stage fracturing cannot be realized; continuous balls cannot be cast, which makes the work efficiency of fracturing construction very low; some ball throwers need to release pressure when throwing balls, and opening the ball thrower to reload the balls is not only time-consuming to operate, There is a great safety hazard when the pressure is released

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