Method for welding drilling tool stabilizer alloy blocks

Abstract

The invention relates to the field of alloy welding, and provides a method for welding drilling tool stabilizer alloy blocks. The method is used for welding the alloy blocks to centralizing wings of a drilling tool stabilizer respectively, a template with a plurality of openings is manufactured at first, the openings are distributed corresponding to the to-be-welded positions of the centralizing wings, then the alloy blocks are arranged in the openings in a one-to-one correspondence mode, flexible fixing pieces are fixed to the alloy blocks, the surfaces of the centralizing wings are cleaned and are evenly heated at the same time, then subassemblies of the flexible fixing pieces and the alloy blocks are arranged at the to-be-welded positions of the high-temperature centralizing wings, the centralizing wings and the alloy blocks are welded after the flexible fixing pieces are removed, and finally the centralizing wings are cooled to the room temperature and are polished. The template used for arrangement and distribution is adopted in welding of the alloy blocks and the centralizing wings, the alloy blocks can be evenly arranged, welding speed is high, then the temperature difference between the centralizing wings cannot be tool large, welding quality is guaranteed, welding cracks are prevented from being generated in the later well drilling process, meanwhile, the manufactured template can be repeatedly utilized, and cost is saved.

Description

technical field [0001] The invention relates to the field of alloy welding, in particular to a method for welding an alloy block on a drill tool stabilizer. Background technique [0002] In oil drilling, drill tool stabilizers are one of the most commonly used tools, which are respectively connected to the upper part of the drill bit and the middle of the drill collar or drill pipe to center the drill bit and the drill tool to prevent drilling deviation. Generally, when drilling tools are tripped or rotated, in order to reduce the number of contact times between drilling tools such as drill collars or drill pipes and the well wall, the diameter of the righting wing of the drill tool stabilizer is enlarged to make the righting wing contact the well wall as much as possible. Therefore, in order to enhance the wear resistance of the centralizing wing, several alloy blocks are usually welded on the surface of the centralizing wing. [0003] Generally, the drilling tool stabiliz...

AI Technical Summary

Problems solved by technology

[0003] Generally, the drilling tool stabilizer is made of high-quality alloy medium carbon steel or non-magnetic stainless steel, and its welding performance is poor

In the traditional welding method of alloy block of drilling tool stabilizer, steel tweezers are used to evenly arrange a block of alloy block on the centralizing wing at 300-350°C, the safety is too poor, and the welding time is too long, so it is different from the unwelded centralizing wing. Wings cause a large temperature difference, which is prone to welding cracks, and the welding quality cannot be guaranteed, and cracks may appear in the subsequent drilling process, which may lead to safety accidents

Images