Equipment special for machining key groove in inner side of wall of long and deep pipe through electric spark forming

Abstract

The invention discloses equipment special for machining a key groove in the inner side of the wall of a long and deep pipe through electric spark forming. The equipment comprises a first pipe column body, a second pipe column body and a third pipe column body. The rear end of the first tubular column body is fixedly connected with the front end of the second tubular column body, and the rear end of the second tubular column body is connected with the front end of the third tubular column body through a guide column. A machining guide mechanism is arranged at the front end of the first tubularcolumn body and comprises a machining electrode, an electrode radial displacement device and a guide rod. According to the equipment special for machining the key groove in the inner side of the wallof the long and deep pipe through electric spark forming, the second pipe column body and the third pipe column body move forwards in a machined pipe in a movable feeding mode. Inconvenience and limitation caused by the fact that a telescopic rod is too long when the telescopic rod is manually pushed in the past are avoided. The equipment is reliable in overall operation and high in machining precision.

Description

technical field [0001] The invention belongs to the technical field of special equipment for machining key grooves on the inside of drill pipes or well wall pipes for oil drilling, and in particular relates to special equipment for machining key grooves on the inside of long and deep pipe walls by electric discharge forming. Background technique [0002] Keyway processing is required on the inner side of the pipe body of the drill pipe or wellbore pipe equipment for oil drilling. The traditional special equipment in this field has been unable to overcome some problems due to the defects of structural equipment, resulting in a large gap in the deep pipe internal keyway processing technology. limitations; for example, in the process of deep pipe processing, the equipment enters the inside of the pipe to push it manually through the use of telescopic rods, but the length of the telescopic rods is limited, and the equipment cannot enter deeper pipes for processing; secondly, The...

AI Technical Summary

Problems solved by technology

[0002] Keyway processing is required on the inner side of the pipe body of the drill pipe or wellbore pipe equipment for oil drilling. The traditional special equipment in this field has been unable to overcome some problems due to the defects of structural equipment. limitations; for example, in the process of deep pipe processing, the equipment enters the inside of the pipe to push it manually by using the telescopic rod, but the length of the telescopic rod is limited, and the equipment cannot enter deeper pipes for processing; secondly, The processing accuracy is very low, which leads to poor processing effect. When the equipment enters the tube and encounters obstacles, it is easy to cause damage to the equipment, resulting in the failure of processing and affecting work efficiency.

Images