An overall thickening equipment for heavy drill pipe end

Abstract

The invention provides overall thickening equipment for the heavy weight drill rod pipe end. The overall thickening equipment comprises a base. The base, a rear beam, a top beam, a middle beam, a rear front beam and a front beam are connected into a frame. An upsetting oil cylinder is connected to the rear beam in a butt joint manner. Guide rods are arranged between the rear beam and the middle beam. The guide rods are sleeved with an upsetting walking beam. One side of the upsetting walking beam is connected with a piston rod of the upsetting oil cylinder, and a punch movement device is arranged on the other side of the upsetting walking beam. A punch is arranged on the punch movement device. A thickening device is arranged between the middle beam and the rear front beam. A clamping device is connected to the rear front beam and the front beam through a connecting rod. A clamping seat is arranged on the rear front beam and the front beam. In the thickening process, a steel pipe is fed into the thickening device, the clamping device clamps the steel pipe to the clamping seat, the upsetting oil cylinder drives the upsetting walking beam to move so as to drive the punch to thicken the end of the steel pipe, the punch returns back after thickening operation is finished, the thickening device releases a thickening die, the steel pipe retracts out of the overall thickening equipment for the heavy weight drill rod pipe end, the metal streamline of produced overall drill rods is good, quality is stable, and the machining cost is low.

Description

technical field [0001] The invention relates to the technical field of heavy drill pipes, in particular to an overall thickening device for pipe ends of heavy drill pipes. Background technique [0002] In drilling operations, whether it is rotary drilling or downhole motor drilling, the fatigue damage of the drill string often occurs in the transition section between the drill pipe and the drill collar. In the transition section, the section between the drill collar and the drill pipe changes drastically. Bending stress concentration is caused, and because the drill string is often in a tension-compression alternating stress state, the transition section is more likely to lead to accidents. The weighted drill pipe is used as a transitional drill tool between the drill pipe and the drill collar. It plays the role of linking up and down. It mainly improves the stress environment between the drill pipe and the drill collar, and also plays the role of pressurizing the drill bit....

AI Technical Summary

Problems solved by technology

Both the welded type and the bar processing type have defects to varying degrees. The welded heavy drill pipe uses friction welding to weld the pipe body and the weighted joint together. The disadvantage is that there is stress concentration at the welding point between the drill pipe body and the joint It is relatively low, with many procedures and large investment in equipment; the bar processing type heavy drill pipe is processed by drilling and turning solid bars. The disadvantage is that the cutting volume is large, the metal fibers are often cut off, and the processing cost is high. Low material utilization rate, time-consuming and labor-intensive

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