Horizontal Well Cyclone Sand Washer

Abstract

The invention relates to a cyclone sand washing device for a horizontal well. During the conventional sand washing construction of horizontal wells, the sand washing fluid and the formation sand are respectively located in the upper and lower layers of the production casing under the action of gravity, causing the construction fluid to flow from the upper layer and cannot effectively carry the formation sand in the lower layer to move together, let alone effectively Carrying formation sand back out of the wellbore, the specific performance is low construction efficiency, huge water consumption, sand washing effect, and poor construction pipe strings that are easy to be buried in sand. A swirl sand flusher for horizontal wells, comprising a vector flushing pipe and an isolated flushing pipe connected by a tubing collar, the isolated flushing pipe includes tubing shorts and tubing collars at both ends thereof, and the isolated flushing pipe passes through the The oil pipe collar is connected with the vector flushing pipe. The invention can effectively improve sand washing efficiency, reduce construction period and water consumption, prevent drill stuck accidents in sand washing operation, greatly save construction cost, and can forcibly carry formation sand back to the ground during sand washing of horizontal wells.

Description

technical field [0001] The invention relates to a sand washer, in particular to a horizontal well cyclone sand washer. Background technique [0002] During the oil production process, the formation sand will be transported into the production casing along with the flow of the formation liquid, causing production failures such as sand buried perforation sections and stuck downhole tools. After a certain period of production, it is necessary to carry out sand flushing operations for production wells with more sand production. Generally, sand flushing fluid and sand flushing construction strings are used to flush the formation sand deposited in the production casing and carry it out of the wellbore to recover. The circulation channel of the formation liquid, so as to ensure the normal production of the oil well. However, in the conventional sand washing construction of horizontal wells, due to the existence of horizontal well sections, the sand washing fluid and formation san...

AI Technical Summary

Problems solved by technology

However, in the conventional sand washing construction of horizontal wells, due to the existence of horizontal well sections, the sand washing fluid and formation sand are respectively located in the upper and lower layers of the production casing under the action of gravity, which will cause the construction fluid to flow from the upper layer and cannot be effectively carried The formation sand in the lower layer moves together, and cannot effectively carry the formation sand back to the wellbore. The specific manifestations are low construction efficiency, huge water consumption, sand washing effect, and poor construction pipe strings that are easy to be sand buried.

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