Cluster well group cathodic protection DC distribution device, manufacturing method and protection method thereof

A cathodic protection and distribution device technology, applied in the direction of DC network circuit devices, circuit devices, electrical components, etc., can solve the problems of unprotected casing and corrosion, and achieve the effects of light weight, low energy consumption and small size

Pending Publication Date: 2018-11-16
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the absence of digital remote monitoring and the lack of management, the managers have not known it for a long time. As a result, the cathodic protection cabinet cannot provide normal cathodic protection current to the casing of the cluster well group, and the casing will corrode if it is not protected

Method used

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  • Cluster well group cathodic protection DC distribution device, manufacturing method and protection method thereof
  • Cluster well group cathodic protection DC distribution device, manufacturing method and protection method thereof
  • Cluster well group cathodic protection DC distribution device, manufacturing method and protection method thereof

Examples

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Effect test

Embodiment 1

[0033] This embodiment provides a cathodic protection DC distribution device for a cluster well group, which includes a plurality of dual resistance segmental rotary rheostats, one end of each dual resistance segmental rotary rheostat is connected to the negative pole of the cathodic protection DC power supply connected, and the other end is respectively connected to the corresponding oil well casing 11 or water well casing 12;

[0034] The dual-resistance segmented rotary rheostat is composed of two single-connected segmented rotary rheostats connected in parallel, and a metal protective box 14 is arranged outside the dual-resistance segmented rotary rheostat.

[0035] The metal protective box 14 shells prevent dust from falling on the resistor body, affecting the contact of the blade contact 6 with the carbon brush, and ensuring the stable output of current from the fixed moving piece 2. The front end of the rotating shaft 9 is equipped with an adjustment handwheel for conve...

Embodiment 2

[0038] On the basis of Embodiment 1, this embodiment provides a cathodic protection DC distribution device for cluster well groups. The single-connected segmented rotary rheostat includes fixed stator 1, fixed moving blade 2, and fixed stator 2. 3. Segmented resistor body 1 4, blade contacts 6, rotating moving plate 7, segmented resistor body 2 8, rotating shaft 9 and hollow cylindrical ceramic skeleton 10, the hollow cylindrical ceramic skeleton 10 is non-closed;

[0039] The first fixed piece 1 and the second fixed piece 3 are respectively fixed at two gaps at the top of the hollow cylindrical ceramic skeleton 10, and the rotating shaft 9 is arranged at the center of the top circle of the hollow cylindrical ceramic skeleton 10. Both the fixed moving piece 2 and the rotating moving piece 7 are connected to the rotating shaft 9, and the segmented resistor body 1 4 and the segmented resistor body 2 8 are all wound on the hollow cylindrical ceramic skeleton 10 with resistive insu...

Embodiment 3

[0044] This embodiment provides a method for manufacturing a cathodic protection DC distribution device for a cluster well group (taking a double-connected 1600W / 5Ω resistance segmental rotary rheostat as an example), including the following steps:

[0045] Step 1) Starting from one end of the hollow cylindrical ceramic frame 10, use an insulating constantan 1mm×1mm square wire 8.3m to tightly wind 80 turns on the hollow cylindrical ceramic frame, and reserve 50mm as a segmented resistor 4, and then Use an insulated constantan 1.2mm×1.2mm square wire of 18 meters to wind 120 turns on the hollow cylindrical ceramic skeleton, and reserve 50mm before and after it as segmented resistor 2. Use a multimeter to measure the resistance value of segmented resistor body 14 as 4Ω. The resistance value of segment resistor 2 is 6Ω, cut off the excess insulating constantan square wire, connect segment resistor 1 and segment resistor 2 with connector 5, and fix fixed piece 1 and segment resist...

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Abstract

The invention provides a cluster well group cathodic protection DC distribution device, a manufacturing method and a protection method thereof. The device comprises a plurality of double resistance value segmented rotary varistors. One end of each double resistance value segmented rotary varistor is connected with a cathode of a cathodic protection DC power supply, and the other end is respectively connected to a corresponding oil well casing or a water well casing. The double resistance value segmented rotary varistor is composed of two single segmented rotary varistors connected in parallel.A metal protective box is arranged outside the double resistance value segmented rotary varistor. By replacing a non-segmented conventional rotary varistor with the resistance segmented rotary varistor, the device of the invention has characteristics of small size, light weight, large DC distribution power, small energy consumption, large resistance adjustment range and stable operation. It ensures the balanced potential difference between the wells in the cathodic protection process of the cluster well group, and normal cathodic protection current is provided for the cluster well group casing. The casing will be protected from corrosion.

Description

technical field [0001] The invention belongs to the technical field of casing protection, and in particular relates to a cathodic protection DC distribution device for a cluster well group, a manufacturing method and a protection method. Background technique [0002] With the prolongation of the use time of the cluster well group, the corrosion of the casing of the cluster well group is also becoming more and more serious, which directly affects the further production of the oil field. Casing corrosion in cluster well group is dominated by external wall corrosion, and cathodic protection is recognized as an effective technology to control external corrosion. Reasonable cathodic protection design will effectively prolong the service life of cluster well group casing. The process of cathodic protection of cluster well group to realize this principle is that the negative pole of DC power supply is connected with the casing of each single well, and the positive pole of DC power...

Claims

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Application Information

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IPC IPC(8): C23F13/20H02J1/00
CPCH02J1/00C23F13/20
Inventor高宝元李昭辉韦海防高诗惠孙学萌李强谭博宁
OwnerBC P INC CHINA NAT PETROLEUM CORP