Corrosion monitoring device and monitoring method for outer wall of underground oil and gas pipeline

Abstract

According to the corrosion monitoring device and method for the outer wall of the underground oil and gas pipeline, when the corrosion monitoring device and method are used, the cover plate and the corrosion coupon are installed on the two sides of the panel respectively, and gaps are sealed. When the corrosion coupon is disassembled, the cover plate is disassembled, and the corrosion coupon is pushed out through the through groove in the embedded plate. The coupon assembly is used for being inserted into the placing groove of the outer sleeve, and the corrosion coupon makes contact with the outside through the exposed groove. The lining rod of the connecting cover assembly is used for being inserted into the remaining space of the imbedding groove so as to limit the hanging piece assembly to move inwards in the radial direction of the outer sleeve. The end face of the sealing cover of the connecting cover assembly and the end face, provided with the imbedding groove, of the outer sleeve are sealed in an attached mode, so that an opening of the imbedding groove is sealed, and drilling fluid is prevented from entering to cause corrosion. The corrosion monitoring device for the outer wall of the underground oil and gas pipeline can be directly installed on the outer side of an oil pipe in a sleeving mode, the hanging piece assembly, the outer sleeve and the connecting cover assembly are easy and convenient to install, gaps are sealed, contact surfaces can be prevented from being rusted, and the corrosion monitoring device is convenient to disassemble.

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