Multifunctional and automatic ball delivery device for wellhead

Abstract

A multifunctional and automatic ball delivery device for a wellhead comprises a base body, wherein a rotating disc is arranged at the upper part of the base body, a ratchet wheel is arranged at the center of the rotating disc, holes for accommodating steel balls are formed in the rotating disc and surround the ratchet wheel, a guide pipe is arranged on the base body, the rotating disc can align one hole to the guide pipe through rotation, a channel is formed in the bottom of the base body, the bottom of the guide pipe is communicated with the channel, the rotating disc drives the steel balls to rotate, a solid part without a hole in the rotating disc is aligned to the steel ball channel in the base body, the steel balls are put in seven holes in the rotating disc sequentially from small to large in the clockwise direction, when a hydraulic cylinder drives a push rod to move to the ratchet wheel, a positioning pin is rotated out of a positioning hole in the rotating disc, a piston rod continuously moves rightwards, a push rod pushes the ratchet wheel to rotate by 45 degrees, the holes with the steel balls in the rotating disc are aligned to the channel in the base body, and the steel balls freely fall into a well through the guide pipe. The multifunctional and automatic ball delivery device has high working efficiency and can perform multi-section fracturing.

Description

technical field [0001] The invention relates to the technical field of horizontal well fracturing wellhead devices, in particular to a multifunctional wellhead automatic ball throwing device. Background technique [0002] In recent years, with the large-scale application of horizontal well staged fracturing technology in China, a major breakthrough has been made in low permeability reservoir horizontal well fracturing technology, which has also greatly improved the development efficiency and recovery of shale gas. Rate. The staged fracturing wellhead not only carries the functions of large-displacement fracturing construction and well control, but also is closely related to the safety of equipment and construction personnel. However, at present, most of the high-pressure wellhead tools specially used for fracturing in domestic horizontal well staged fracturing technology are mainly operated manually. A construction worker switches the valve with pressure at the wellhead, w...

AI Technical Summary

Problems solved by technology

However, at present, most of the high-pressure wellhead tools specially used for fracturing in domestic horizontal well staged fracturing technology are mainly operated manually, and there are great safety hazards and defects in the field implementation process, which are manifested in the following aspects: two A construction worker switches the valve with pressure at the wellhead, which is difficult to cooperate, cumbersome to operate, high in labor intensity, low in reliability, and likely to cause safety accidents; the domestic ball launcher has a complex structure, low ball control accuracy, and cannot continuously cast the ball, which reduces the risk of fracturing. efficiency, and the limited number of pitches prevents multi-stage fracturing

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