Deep well anode device
An anode device and deep well technology, which is applied in the field of oil and gas collection, can solve the problems of large surface electric field influence, easy current upward channeling, uneven electric field, etc., and achieve the effects of improving utilization efficiency, reducing influence, and ensuring stability and uniformity
Active Publication Date: 2021-11-02
PETROCHINA CO LTD
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Problems solved by technology
[0005] Due to the conductive function of the steel pipe sleeve, the current can flow from the bottom of the well to the wellhead of the deep well. The influence of the electric field is also large, which reduces the operating efficiency of the anode device; and the anode cannot be replaced and repaired after being lowered into the steel pipe sleeve, resulting in a high scrap rate of the anode device
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[0040] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meanings as commonly understood by those skilled in the art. Before further describing the embodiments of the present invention in detail, some terms for understanding the embodiments of the present invention are defined.
[0041] In order to make the object, technical solution and advantages of the present invention clearer, the implementation manner of the present invention will be further described in detail below in conjunction with the accompanying drawings.
[0042] The embodiment of the present invention provides a deep well anode device, such as the attached figure 1 And attached figure 2 As shown, the device includes: a sleeve 1 , an anode cable 3 , an anode 4 , a cable 5 and a bearing member 6 .
[0043] The sleeve 1 includes a first sleeve 101 and a second sleeve 102 connected sequentially from top to bottom. The bearing member 6 is located on the ...
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Abstract
The invention discloses a deep well anode device, which belongs to the field of petroleum and natural gas collection. The device includes: a sleeve, an anode cable, an anode, a cable and a load-bearing member; the sleeve includes a first sleeve and a second sleeve connected in sequence from top to bottom; the load-bearing member is located on the first sleeve, and the second The bottom end of the sleeve is offset against the bottom of the prefabricated deep well; the first sleeve and the second sleeve form a shaft with the bottom of the deep well, and the shaft is filled with electrolyte; one end of the cable is connected to the anode, and the other end is connected to the load-bearing member; the anode One end of the cable is connected to the anode, and the other end is connected to the ground power supply through a load-bearing member; the anode is immersed in the electrolyte; the first sleeve is an insulating sleeve, and the second sleeve is a conductive sleeve. The invention guarantees the stability and uniformity of the electric field in the wellbore through the insulating first sleeve and the conductive second sleeve; it is lowered into the wellbore after being connected with the anode by the cable, which facilitates the replacement and maintenance of the anode and improves the The utilization efficiency of this device.
Description
technical field [0001] The invention relates to the technical field of oil and gas collection, in particular to a deep well anode device. Background technique [0002] Cathodic protection technology is a kind of electrochemical protection technology. Its principle is to apply an external current to the surface of the corroded metal structure, so that the metal structure becomes a cathode, so that the electron migration that occurs in metal corrosion is inhibited, and corrosion is avoided or weakened. happened. Impressed current cathodic protection is a kind of cathodic protection technology. The anode device is a device for installing and placing an anode in the process of impressed current cathodic protection, also known as auxiliary anode. In the impressed current cathodic protection system, the protective current is introduced from the power supply to the anode device in the deep well, and the current is sent to the metal structure through the anode device, so that the s...
Claims
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IPC IPC(8): C23F13/16C23F13/20C23F13/22
CPCC23F13/16C23F13/20C23F13/22
Inventor 闫刘斌许向峰苗苗李刚
Owner PETROCHINA CO LTD