Casting method of hook body for rotary hook of ultra-deep well petroleum drilling machine lifting system

Abstract

The invention discloses a casting method of a rotary hook body for a hook of an ultra-deep well petroleum drilling machine lifting system. The casting method specifically comprises the following steps that 1, a model of the hook body of the rotary hook is manufactured; 2, according to the model in the step 1, a real sample and a core box of the hook body of the rotary hook are manufactured; 3, coating is manually brushed; 4, the box is closes; 5, pouring is carried out; 6, the box is opened, and the box is opened after heat preservation for about 40-45 hours after pouring; and 7, primary sand blasting is carried out on the hook body, after normalizing treatment, hot cutting is carried out on a casting head, patching is carried out, dehydrogenating treatment is carried out, then secondary sand blasting is carried out, and synchronously machining is carried out on other parts of the hook body. According to the method, the problem that in the prior art, due to the casting defect of shrinkage cavity and shrinkage porosity of the hook body, the dye penetrant inspection percent of pass of key parts of the hook body is low is solved, energy materials are saved, and production efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of mechanical equipment preparation, and relates to a method for casting a hook body for a hook of a hoisting system of an ultra-deep well oil drilling rig. Background technique [0002] The hook body is the most important bearing part on the lifting system of the oil drilling rig. The material is ZG18CrNi2MoA. The existing hook body has a complex structure, consisting of the hook body, the main hook and the auxiliary hook. For high-strength steel castings, the technical requirements of the parts include: first, the surface of the casting should be subjected to magnetic particle inspection, which should meet the requirements of API Spec 8C "Drilling and Oil Production Lifting Equipment Specifications" and meet the quality requirements of PSL2; secondly, the processed surface should be subjected to ultrasonic inspection. Comply with the requirements of APISpec 8C "Drilling and Oil Production Lifting Equipment...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a casting method for the hook body used in the hoisting system of an ultra-deep oil drilling rig, which solves the casting defect of the hook body in the prior art due to shrinkage cavity and shrinkage, which leads to a low qualified rate of coloring and flaw detection of key parts of the hook body The problem

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