Double-layer channel flow complementary type pressure guide sand blaster

Abstract

A double-layer channel flow complementary type pressure guide sand blaster comprises a sand blaster body, a pin, a sand blasting hole, a seal ring, a double-layer channel flow complementary type slide sleeve, a pressure guide lower connector, a pressure guide pipe, a water seepage kerf and an inner pressure guide channel. By means of the sand blaster, the advantage that a ball pitching sand blaster can be used in a multi-level mode is kept, and meanwhile through the unique and novel design of the double-layer channel type flow complementary type slide sleeve, the sand blaster can comprise a slide sleeve inner layer channel and a slide sleeve outer layer channel; when one of the overflow section areas of the two channels is enlarged or narrowed, the other one of the overflow section areas of the two channels is accordingly narrowed or enlarged, and complementation is achieved; a basic fixed value is achieved for the overflow area, and the disadvantage that throttling is conducted on the sand blaster layer by layer on a tubular column is overcome. By means of the pressure guide lower connector, water pressure on the upper layer passes by a low-density ball through the pressure guide lower connector and is conducted to a tool which is on the lower layer and needs water pressure, for example, a packer and a hydraulic anchor, and normal work of the construction tubular column is ensured. When the sand blaster is applied in the construction tubular column, friction force borne by high-pressure liquid in the tubular column can be reduced, the overflow amounts and the overflow speeds in the whole tubular column can be similar, flow limiting is avoided, and the sand conveying efficiency is improved.

Description

technical field [0001] The invention relates to petroleum drilling mechanical equipment, in particular to a pressure-guiding sand blaster with double-layer channel flow complementation. Background technique [0002] Since the reform and opening up, the national economy has grown rapidly, "scientific and technological innovation, independent innovation" has become the mainstream of domestic industrial development, and my country's industry is gradually developing in the direction of intensive, energy-saving and emission-reducing, low-carbon and high-efficiency. The sand blaster is used in the late stage of oil well exploitation, in order to improve the clogging of reservoir pores caused by organic matter precipitation and sand production and increase production, and the components used in the fracturing and acidizing construction string. It is mainly to spray high-pressure sand-containing liquid to the specified layer, and at the same time, it generates throttling to form an ...

AI Technical Summary

Problems solved by technology

At the same time, in order to ensure the pressure difference inside and outside the pipe to provide the sealing force for the packer, the sand blasting hole is reduced, the flow rate is limited, and the sand delivery efficiency is reduced. However, at the same time, the pressure required for fracturing the formation must be ensured, so the workload of the ground facilities will be increased, which will lead to shorten its life

Differential pressure sliding sleeve sand blaster, which accepts hydraulic signals, can only be used once in the fracturing string, and it should be used first in the first layer, that is, the lowest layer. It takes a lot of time to lift up, and it is difficult to seal the wellhead

In order to solve the above problems, the scientific and technological personnel of scientific research units continue to research and explore, and develop new sand blasters. Although some progress has been made in technology, there are still technical problems that have not been overcome in actual use.

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