Portable Magnetic Flux Leakage Non-destructive Inspection Instrument For Drill Pipe

Drill pipe is an important component of the drilling equipment, and malfunction often occurs for its defects, leading to enormous economic losses. it is very important to make researches on non-destructive testing method for spot drill pipe stacked and to develop portable inspection instrument for drill pipe.Based on investigating testing actuality for drill pipe, character of configuration , shape and familiar position of defects of drill pipe were analysed. Magnetic flux leakage non-destructive inspection method with automatical testing probe and assistant vehicle equipped were brought forward. Design scheme of portable magnetic flux leakage non-destructive inspection instrument for drill pipe was given. The feasibility of Movement means, work principle and position of equipment were reasoned.Aiming at the characteristic of Variational diameter and local stack of drill pipe .an effective method that testing once drill pipe body and part thickened at the end of drill pipe all together was studied deeply. A suit of Magnetic flux leakage non-destructive automatical testing probe was developed . Comparing magnetization theory with coil, magnetizing apparatus probe shoe groupware, and with drive, experimental outcome of manifold scheme was presented, and structure was chosen preferably. Ulteriorly, the best test pose of probe core and effect on test signal were analysed. probe core with multi-degree of freedom fluctuated was designed and experimentalized. scheme optimized was put into effect. The way to reduce test dead zone was expatiated.Summarizing the result of research, development method of inspection instrument was expounded and the test dead zone was reduced. Inspection assembly, test assistant vehicle and control of electric were designed. By improve and apply continually, the equipment has a preferable test effect.Practice shows that the portable magnetic flux leakage non-destructive inspection instrument can detect drill pipe in good time and fleetly. It has a characteristic of efficient test, predominant maneuverability and agility, which was used in some company with a good feedback.