Flow-limiting valve for filling

Abstract

The invention relates to the technical field of oil and gas extraction, and discloses a flow-limiting valve for filling. In the well completion filling operation process, the flow-limiting valve is in an open state, a plurality of flow guide holes in a valve element part of the flow-limiting valve expand a filling channel, the displacement requirement of particle filling can be met, the filling operation time can be shortened, and the filling efficiency can be improved. Meanwhile, after filling operation is completed, crude oil can be mined out of a well through flow guide holes in the early mining stage, and the crude oil mining efficiency is improved. After the flow-limiting valve is closed, normal mining operation is not affected. In the later stage of oil well production, a pipe column can be put down to inject chemical agents into the stratum through the flow-limiting valve, after injection is completed, the flow-limiting valve is automatically closed under the action of fluid from outside to inside in the production stage, and normal mining operation is not affected. A reserved channel is provided for implementation of yield increasing measures, and the mining progress is guaranteed.

Description

technical field [0001] The invention relates to the technical field of petroleum and natural gas exploitation, in particular to a flow limiting valve for filling. Background technique [0002] In the process of oil and gas development, in order to improve the development effect of horizontal wells, the combination of particle packing and flow control devices is often used for water control completion. During the construction operation, the particle filling operation needs to be carried out after the completion string is lowered, but because the flow control device has a strong flow limiting effect on the filling fluid, it cannot meet the filling displacement requirements of the particles during the filling operation, resulting in The filling operation takes a long time and the filling efficiency is relatively low. At the same time, due to the flow limiting effect of the flow control device, in the later stage of oil well production, it is impossible to inject chemicals into...

AI Technical Summary

Problems solved by technology

During the construction operation, the particle filling operation needs to be carried out after the completion string is lowered, but because the flow control device has a strong flow limiting effect on the filling fluid, it cannot meet the filling displacement requirements of the particles during the filling operation, resulting in The filling operation takes a long time and the filling efficiency is relatively low

At the same time, due to the flow limiting effect of the flow control device, in the later stage of oil well production, it is impossible to inject chemicals into the formation inside the completion string, which affects the progress of oil and gas production.

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