Intelligent sand-prevention and water-controlling sieve tube

Abstract

The invention provides an intelligent sand-prevention and water-controlling sieve tube which comprises a base tube, a sand-prevention filtering layer and self-adjustment flow control valves, wherein a mounting hole communicated with the inside of the base tube is formed on the base tube; the sand-prevention filtering layer is arranged at the outer part of the base tube in a sleeving manner, and a filtrate cavity is formed between the sand-prevention filtering layer and the outer wall of the base tube; at least one self-adjustment flow control valve is mounted in the mounting hole of the base tube and is located in the filtrate cavity. The intelligent sand-prevention and water-controlling sieve tube provided by the invention consists of the base tube, the self-adjustment flow control valves and the sand-prevention filtering layer, the sand-prevention filtering layer is arranged at the outer parts of the self-adjustment flow control valves and is used for filtering oil-water mixed liquor at first to isolate formation sand at the outer part of the sieve tube, the filtered oil-water mixed liquor flows through a channel to the self-adjustment flow control valves, the self-adjustment flow control valves are used for intelligent water control, the flow rate of the oil-water mixed liquor in the base tube is controlled according to the water content of the oil-water mixed liquor, and meanwhile, the purposes of sand prevention, water control, oil stabilization and yield increase are achieved.

Description

technical field [0001] The invention relates to an oil well completion pipe string, in particular to an intelligent sand control and water control screen. Background technique [0002] With the development of oil exploration and development technology, the use of horizontal well technology to develop oil and gas fields has become an effective technical means to improve oil recovery and single well production, exploit remaining oil, and reduce the cost per ton of oil. Horizontal wells increase the contact area between the wellbore and the reservoir, and can better develop thin oil layers or reservoirs with high vertical permeability, and play an increasingly important role in the exploitation of oil and gas resources. At present, most domestic horizontal wells have entered the medium-high water cut period, and the production of horizontal wells has dropped rapidly after water breakthrough. In some oilfields, most of the horizontal wells see water soon after they are produced...

AI Technical Summary

Problems solved by technology

[0006] Based on this, it is necessary to provide an intelligent system that can realize the integration of sand control, water control, and oil stabilization in view of the existing problems that the self-adjusting flow control valve cannot control sand, and the screen cannot control water, and the two cannot be well combined. Sand control water control screen

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