Downhole switch tool

Abstract

The invention relates to an operating tool in the open and close states of a downhole pressure control and water regulation or sand control zonal oil production tool used for well oil production in the field of well oil recovery, in particular to an downhole switch tool controlled by the ground which comprises a travelling mechanism, a switch actuating mechanism and a position-detecting conductivering, the downhole switch tool can automatically move underground through the moving mechanism, and the switch valve in the downhole sieve tube can be opened and closed through the shifting block telescopic mechanism in the switch actuating mechanism, thereby controlling the open and close states of the downhole sand filtering pipe on the ground, realizing the exploitation or blocking of the position of the stratum and finally achieving the purpose of selectively exploiting the oil layer and ensuring the effective and reasonable exploitation of the oil well. According to the invention, the downhole switch tool has wide application range and can be applied to stratified oil recovery in a horizontal well and a vertical well or an inclined well.

Description

technical field [0001] The invention relates to an operating tool in the "on" and "off" states of downhole pressure regulation and water control or layered oil production sand control tools used in oil well production in the field of oil production, in particular to a downhole switch tool controlled by the ground. Background technique [0002] The oilfield has entered the later stage of development, and the strata have problems of high water content, loose skeleton and increasingly prominent interlayer contradictions. The production capacity of the low-pressure layer is suppressed due to interlayer interference, and the phenomenon of water and sand production in oil wells is becoming more and more serious. In order to realize the normal production of oil wells, it is necessary to adopt comprehensive technical measures to prevent interlayer interference and oil well sand control. [0003] Publication No. CN102418500B discloses a direct-controlled continuous quantitative stra...

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Problems solved by technology

[0004] Publication No. CN102758600B discloses a sound-controlled differential pressure balance switch for horizontal wells, which is characterized in that it emits sound waves on the ground to control the downhole switch, but the receiving system is susceptible to interference and has low reliability and complex structure. , and the downhole self-contained battery will self-consume and fail over time, causing its signal processing system and switch actuators to lose their function due to insufficient power

[0005] At present, our company has developed a screen with an on-off valve inside. By controlling the opening and closing of the on-off valve in the screen, the normal production or plugging of a certain horizontal section or a certain oil layer can be realized, so that the oil layer can be selectively exploited to ensure The effective and reasonable production of oil wells has solved the problems of unbalanced pressure gradient in homogeneous reservoirs in horizontal well sections, interlayer contradictions in heterogeneous multi-reservoirs and premature watering out of bottom water reservoirs

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