| 摘要 |
The invention relates to an automatic electrochemical treatment of slots having a width within the range of 03 to 08 mm and a length within the range of 100 to 120 mm, located on the generatrix of the metallic pipes used as filters in oil and gas wells working in oil fields deposits with loose Such filter are also used in water supply wells Said installation can make such slots in metallic pipes having a diameter ranging from 50 to 3238 mm and lengths up to 1,000 mm The automated installation comprises a hydraulic pressure source (15), a safety control and filter unit (16), a manual flow rate control unit, an electrically driven hydraulic distributor (18) hydraulic cylinder (19), a balancing unit (21) located in a mobile carriage-assembly (20), next to other known elements such as a DC power source (22), a AC power source (23) and an advancing system The installation also comprises an automatic control module comprising a filtering and a preamplifying unit (25), an amplifying and comparing unit for the comparison of the working current with a predetermined value (26), a control unit for the working element (27), a control unit for the electrovalve of the balancing unit (28), a supply unit (29)
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