A method for manufacturing an energy-saving compound nozzle for a diamond drill bit

Abstract

The invention relates to a method for manufacturing an energy-saving composite nozzle of a diamond drill bit. The method comprises the following steps of: (1) machining a nozzle base body, (2) machining a work end base body, (3) heating, and (4) assembling, wherein an assembling part of the work end base body is embedded into a planar work table after being washed and dried, a part of the assembling end is placed upwards, a pair of work pincers are used for taking out the heated nozzle base body, the nozzle base body is aligned to and pressed into the assembling face of the work end base body easily, assembling in place is checked, then the assembling process is finished, and finally heat-preserving and cooling are carried out. Common 40 CrMn steel is adopted for replacing most of tungsten carbide, so the use amount of rare precious metal is reduced, and resources of the rare precious metal are saved. Moreover, the procedure of sintering the tungsten carbide is eliminated and energy is saved. In addition, a composite function is provided, the screw thread portion of the nozzle is made of the 40 CrMn steel instead of carbon tungsten alloy, and therefore toughness of the screw thread portion is strengthened, and the service life of the screw thread portion is prolonged.

Description

technical field [0001] The invention relates to a manufacturing method of a nozzle, in particular to a method that uses ordinary 40CrMn steel to replace most of the tungsten carbide, reduces the sintered tungsten carbide link, enhances the toughness of the threaded part, and prolongs the service life of the threaded part. A manufacturing method of an energy-saving composite nozzle for a diamond drill bit. Background technique [0002] The invention relates to oil drilling technology, and is a main component of an oil drilling tool——PDC drill bit. During the drilling process of the drill bit, the main functions of the drill bit nozzle are: to cool the temperature of the drill bit at the bottom of the well, to lubricate the friction between the drill bit and the bottom layer, to flush the cuttings at the bottom of the hole, to exert the hydraulic power of the drilling fluid, and to assist the drill bit to break the formation. [0003] PDC drill bits have the advantages of fas...

AI Technical Summary

Problems solved by technology

The traditional drill bit nozzle is made of tungsten carbide powder sintered at one time. Metal tungsten is a rare metal. A large amount of metal tungsten is used as raw material, which wastes a lot of resources and high cost, and does not meet the requirements of low-carbon economy; when adjusting drilling parameters in drilling engineering, Replacement nozzles are frequently disassembled, and the brittle tungsten carbide alloy thread groove is easily twisted off, resulting in a high nozzle scrap rate

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