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发明公开
CN105913938A 一种油井用耐高温钢管热电偶电缆及制作方法 无效 - 撤回

一种油井用耐高温钢管热电偶电缆及制作方法
摘要：
本发明涉及一种油井用耐高温钢管热电偶电缆及制作方法，特别是长度较大的油井用耐高温钢管热电偶电缆，属于热电偶电缆技术领域。技术方案是：热电偶导体（1）外绕包内耐高温陶瓷带（2），构成线芯，多根线芯成缆，线芯之间填充耐高温填充陶瓷（3），外面绕包外耐高温陶瓷带（4），外耐高温陶瓷带（4）外面设有不锈钢管（5）。本发明选配K型热电偶合金丝（一正两负），正极：镍铬（KP），负极：镍硅（KN）精密级热电偶，实现了测温精密控制；实现了2000米以上的大长度电缆生产，中间无接头，解决了传统氧化镁热电偶不能大长度生产，接头处易吸潮、绝缘电阻低及容易开裂质量隐患，保证了电缆的使用安全。
摘要（英）：

The invention relates to a high-temperature resistant steel pipe thermocouple cable for an oil well and a manufacturing method, in particular to a relatively long high-temperature resistant steel pipe thermocouple cable for an oil well, and belongs to the technical field of thermocouple cables. According to the technical scheme, inner high-temperature resistant ceramic tapes (2) wrap the outside of thermocouple conductors (1) to form wire cores respectively; a plurality of wire cores form the cable; the part among the wire cores is filled with high-temperature resistant filling ceramic (3); an outer high-temperature resistant ceramic tape (4) wraps the outside of the high-temperature resistant filling ceramic (3); and a stainless steel tube (5) is arranged outside the outer high-temperature resistant ceramic tape (4). K-type thermocouple alloy wires (one positive alloy wire and two negative alloy wires) are matched; the positive alloy wire is made of nickel-chromium (KP) alloy; the negative alloy wires are made of nickel-silicon (KN) alloy; the manufactured thermocouples are precision-level thermocouples; precision control on temperature measurement is achieved; production of over 2,000m long cable is achieved; no joint is formed in the middle; the hidden quality problems that a long traditional magnesium oxide thermocouple cannot be produced and the joint easily absorbs moisture, and is low in insulation resistance and easy to crack are solved; and the use safety of the cable is ensured.

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