Single-trip flushing and two-way filling sand control pipe column

Abstract

The invention discloses a single-trip flushing and two-way filling sand control pipe column. The single-trip flushing and two-way filling sand control pipe column comprises a top hanging packer, a top filling server, a two-stage closing bottom filling device, a flushable bottom flushing server and an inner filling pipe column which are connected in sequence. The sand control pipe column has the advantages that the sand control pipe column is flushed in a single-trip and two-way filling manner, the sand control pipe column can be put down while being flushed, a tool is directly set after the sand control pipe column is in place, and a filling hole is opened to implement bottom gravel filling operation; after the first stage is completed, the well is back flushed, a steel ball is put into a wellhead, a top filling hole is opened, and second-stage gravel filling is performed to ensure annulus gravel filling saturation; and hands are released to pull out the filling pipe column. The whole process is completed at a time, the operation workload is greatly reduced, the well occupying time is shortened, and the measure effect is guaranteed.

Description

technical field [0001] The invention relates to a pipe string for sand control measures, which realizes flushing while descending at the same time, and top and bottom two-way filling for a pipe string of an oil, gas and water well, and belongs to the field of petroleum machinery. Background technique [0002] In the process of oil and gas exploitation, when it is necessary to implement sand control measures, in order to improve the operation quality and prolong the maintenance cycle of oil wells, it is often necessary to implement gravel packing and sand control operations. At present, the number of horizontal wells and high-inclination wells is increasing. These wells often encounter the following problems in the sand control process of filling: 1. The quicksand is serious, and the conventional sand control tools are often not in place, and the pipe string needs to be pulled down many times, and water is poured after sand washing The pipe string under the side takes a long ...

AI Technical Summary

Problems solved by technology

At present, the number of horizontal wells and high-inclination wells is increasing. These wells often encounter the following problems in the sand control process of filling: 1. The quicksand is serious, and the conventional sand control tools are often not in place, and the pipe string needs to be pulled down many times, and water is poured after sand washing The pipe string under the side takes a long time to occupy the well and has a large amount of repetitive work; 2. Some oil wells have long well sections and large inclinations, and the saturation of gravel packing is insufficient, which may easily lead to sand control failure; 3. Conventional packing strings require multiple operations to achieve The construction effect, the process is complicated, the workload is heavy, and the effect is difficult to guarantee

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