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Weight loss method for monitoring wellhead corrosion status

A state, hollow rod technology, used in weather resistance/light resistance/corrosion resistance, measuring devices, instruments, etc., can solve the problems of inability to monitor the corrosion status of flat pipes or vertical pipes, and inconvenient hanging.

Inactive Publication Date: 2016-10-12
CHINA PETROLEUM & CHEM CORP +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, it is impossible to monitor the corrosion status of flat pipes or standpipes, and it is not convenient to hang multiple samples. A new method of hanging pieces for monitoring the corrosion status of wellheads is provided.

Method used

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  • Weight loss method for monitoring wellhead corrosion status
  • Weight loss method for monitoring wellhead corrosion status

Examples

Experimental program
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Effect test

Embodiment 1

[0014] A hanging piece method for monitoring the corrosion condition of the wellhead, such as figure 1 As shown, remove the plug 1 at the position of the connection pressure gauge on the oil and gas production tree or gas tree, expand the diameter of the inner hole of the plug 1, and process the inner thread on the inner surface of the hole, and insert the hollow The rod 4 is screwed on the inner hole of the plug 1 for fixing. In order to prevent the hollow rod from being corroded during the corrosion monitoring process, the hollow rod is made of corrosion-resistant material, and no galvanic corrosion occurs between the hollow rod and the plug. The part where the hollow rod 4 is connected to the plug 1 is circular, and the part where the sample is suspended is circular. A hollow rod whose entirety is circular is called a circular hollow rod. Drill holes at a certain distance between the hollow rods 4, and use insulating gaskets 3, nuts 6 and screw rods 2 to fix the test piec...

Embodiment 2

[0016] A hanging piece method for monitoring the corrosion condition of the wellhead, such as figure 2 As shown, remove the plug 1 at the position of the connection pressure gauge on the oil and gas production tree or gas tree, expand the diameter of the inner hole of the plug 1, and process the inner thread on the inner surface of the hole, and insert the hollow The rod 4 is screwed on the inner hole of the plug 1 for fixing. In order to prevent the hollow rod from being corroded during the corrosion monitoring process, the hollow rod is made of corrosion-resistant material, and no galvanic corrosion occurs between the hollow rod and the plug. The part where the hollow rod 4 is connected to the plug 1 is circular, and the part where the sample is suspended is flat. The part where the test piece is suspended is flat and is called a flat hollow rod. Drill holes at a certain distance between the hollow rods 4, and use insulating gaskets 3, nuts 6 and screw rods 2 to fix the t...

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Abstract

The invention relates to a piece hanging method for monitoring wellhead corrosion status, mainly aiming at solving the problem that in the prior art, a plurality of samples can not be conveniently hung when the corrosion status of a flat pipe or a vertical pipe is monitored. According to the piece hanging method for monitoring the wellhead corrosion status, a hollow rod with external threads is fixed by being screwed in an inner hole of a screwed plug by utilizing the position of a pressure gauge used for measuring the pressure of a Christmas tree in oil and gas production; the connecting part of the hollow rod and the screwed plug is circular, and parts for hanging the samples are circular or flat; holes are drilled in the hollow rod, and the number of the holes depends on the number of the samples to be hung; the technical scheme of adopting insulating spacers, nuts and screw rods to fix test pieces onto the hollow rod better solves the problem; therefore, the piece hanging method can be used for monitoring the wellhead corrosion status.

Description

technical field [0001] The invention relates to a hanging piece method for monitoring the corrosion condition of a well head. Background technique [0002] In oil and gas production, since the corrosion of tubing and casing may affect the oil and gas production process, it is necessary to monitor the corrosion status of tubing and casing. Carrying out on-site corrosion monitoring of tubing and casing without affecting the normal production of oil and gas can accurately understand the corrosion status of tubing and casing. [0003] CN201520919819.8 relates to a wellhead hanging piece device for water injection wells, which replaces the elbow at the standpipe and flat pipe of the water injection wellhead production line with a plug nut, which is screwed on the top of the standpipe, and the plug nut A test piece support is arranged below the middle part, and the test piece is installed on the test piece support through fixing bolts, and the test piece and the flat pipe are loc...

Claims

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Application Information

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IPC IPC(8): G01N17/00
CPCG01N17/00
Inventor 蒋秀范举忠宋晓良屈定荣刘全桢
Owner CHINA PETROLEUM & CHEM CORP
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