Downhole automatic ball throwing device for oil field

Abstract

The invention relates to the technical field of oil field machinery, in particular to a downhole automatic ball throwing device for an oil field. The device comprises an upper connector, an outer barrel, a lower connector and a positioning sleeve, wherein the upper connector and the outer barrel are fixedly mounted together, the outer barrel and the lower connector are fixedly mounted together, and the positioning sleeve is located on the lower portion of an inner cavity of the upper connector; a ball storage barrel is fixedly mounted on the left portion of the inner cavity of the outer barrel, a bottom plug is fixedly mounted on the inner side of the lower end of the ball storage barrel, and a guide sleeve is fixedly mounted on the right portion of the inner cavity of the outer barrel; and corresponding ball holes are formed in the right side of the lower portion of the ball storage barrel and the left side of the lower portion of the guide sleeve respectively, and the lower end of acrankshaft penetrates through the positioning sleeve to be fixedly connected with the upper end of a trigger rod. The downhole automatic ball throwing device is reasonable and compact in structure andconvenient to use, well achieves the purpose of layer changing without lifting out a sucker rod, and has the advantages of being safe and reliable, operations are facilitated, work efficiency is improved, labor intensity and measure cost of operators are greatly reduced, and the requirements of an existing process can be well met.

Description

technical field [0001] The invention relates to the technical field of oilfield machinery, and relates to an automatic downhole ball throwing device for an oilfield. Background technique [0002] Since horizontal wells have a larger drainage area and higher recovery than conventional vertical wells, the number of horizontal wells has increased in recent years. The situation of water breakthrough has become prominent, leading to a further reduction in recovery, and even some wells have been flooded, and the produced fluid contains more than 95% water. Therefore, research and update of water discovery technology is a prerequisite for efficient production of horizontal wells. At present, in the horizontal well mechanical segmental control water search process generally adopted in China, the method of throwing balls is used to realize the opening of the suction layer and the closing of the suction layer. The purpose of layer change can only be achieved by throwing the oil rod a...

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Problems solved by technology

[0003] The present invention provides an automatic ball-throwing device in an oil field, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problem of layer change in the existing mechanical segmental control water-finding process. purpose, resulting in low work efficiency, time-consuming and labor-intensive measures, and high cost of measures, which can no longer meet the existing process requirements

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