Remote RFID control self-sealing pressure difference sliding sleeve

Abstract

The invention provides a remote RFID control self-sealing pressure difference sliding sleeve and belongs to the field of oil and gas well reservoir transformation. The remote RFID control self-sealingpressure difference sliding sleeve comprises an outer shell (1), a valve clack seat groove (2), a sliding sleeve valve (3), an outer sleeve (4), a battery (5), a lower connector (6), a shearing nail(7), a through hole (8) and a valve clack (9). The battery (5) and a downhole control circuit board (14) are mounted in a groove body in the outer shell (1), and an RFID receiving antenna (15) is mounted on the outer shell (1). The downhole pressure difference sliding sleeve can be remotely controlled on the ground to be opened, and compared with the situation that an existing downhole sliding sleeve needs to be opened in the mode of throwing a fracturing ball or lowering a sliding sleeve opening-closing tool, operation is more convenient; and aiming at the situation that the multiple downholepressure difference sliding sleeves are lowered in a same well, different control instructions can be assigned for all the downhole pressure difference sliding sleeves, and the multiple downhole pressure difference sliding sleeves in the same well can be controlled to open in a mutually-independent mode.

Description

technical field [0001] The invention belongs to the field of reservoir transformation of oil and gas wells, in particular to a remote RFID-controlled self-sealing differential pressure sliding sleeve. Background technique [0002] At present, various oil-casing connection downhole switch tools are often used in oilfield delamination measures, casing inspection, leak inspection and other pipe strings. [0003] In the prior art, the downhole switch sliding sleeve is used in oilfield layered fracturing, layered water injection, layered plugging, casing inspection, leak inspection, etc. After the pipe string is in place, the oil casing can be connected by pressing the pipe string. After the measures are completed, stop the pressure to cut off the oil casing annulus, prevent the formation liquid from entering the pipe string, and realize formation pressure maintenance. However, there is a deficiency in the existing device that the spring is deformed during use, and cannot meet t...

AI Technical Summary

Problems solved by technology

However, there is a deficiency in the existing device that the spring is deformed during use, and cannot meet the use requirements after repeated use.

[0004] At the same time, there is a problem whether the existing differential pressure sliding sleeve adopts the ball-throwing method or the sliding sleeve opening method, that is, the position and number of the sliding sleeves cannot be determined, which makes it difficult to control different positions in the same oil well. Differential pressure sliding sleeves will be opened at the same time, which is unfavorable to oilfield layered production

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