Remote controlled packer capable of preventing pre-mature packing

Abstract

The invention discloses a remote controlled packer capable of preventing pre-mature packing. A main body inner liner is arranged in a rubber cylinder, and a displacement sensor is installed on the outer wall of the main body inner liner to detect the expansion and contraction of the rubber cylinder and send the expansion and contraction to a control circuit. A reversing valve is arranged on an oil path between an oil source and a rubber cylinder expansion mechanism, and a pressure sensor is installed on the inner wall of the main body to detect the pressure in a tubing string and send the pressure information to the control circuit. An RFID reading circuit reads information carried by an RFID label in the tubing string and sends the information to the control circuit. The control circuit controls the reversing valve to switch to the first valve position when the pressure value received by the pressure sensor remains greater than a preset pressure for a preset time period continuously, switch to the third valve position when the displacement received by the displacement sensor remains greater than a preset displacement, and switch to the second valve position when a releasing command is received by the RFID reading circuit. Premature packing of the packer can be prevented.

Description

technical field [0001] The invention relates to the field of oil drilling equipment, in particular to a remote control packer capable of preventing early setting. Background technique [0002] In the drilling activities of oil and gas wells, in order to isolate the annular space between the pipe strings of various sizes and the wellbore and between the pipe strings, and to isolate the production layer, to control the production (injection) fluid and protect the downhole tools of the casing, a large number of downhole tools are used. Packer. Hydraulic setting packers are a large category of packers, and are widely used in cementing and completion operations due to their simple operation and controllable setting pressure. [0003] The hydraulic packer uses liquid pressure to expand the rubber cartridge to achieve the purpose of isolation. Since the setting of this type of packer requires the fluid pressure inside the pipe string to be greater than the fluid pressure outside t...

AI Technical Summary

Problems solved by technology

If the operation is not proper, it is easy to cause early setting and fail to achieve the purpose of isolating the production layer; or cause insufficient setting force to effectively isolate and cause leakage

Unilaterally improving the pressure control performance of the ground pressure control equipment cannot avoid the impact of pressure fluctuations in the string on the performance of the packer

In addition, due to factors such as improper operation of ground personnel or vibration of downhole tools, the unpacking mechanical structure may malfunction, and cause the packer to be unpacked prematurely or wrongly.

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