Manufacturing method of integral forging hook cylinder of hook bock assembly for minus 60 DEG C polar region drilling rig

Abstract

The invention provides an integral forging hook cylinder of a hook bock assembly for a minus 60 DEG C polar region drilling rig and a manufacturing method of the integral forging hook cylinder. The forging hook cylinder is characterized in that the upper part is a square body, pin holes are formed in the square body, the lower part is a cylinder, the cylinder is provided with a base plate and pinholes, the middle part is in circular cone transition, and the interior is provided with a stepped through hole. The manufacturing method comprises the following steps that (1) forging is carried out,wherein upsetting and drawing are carried out on a blank in advance, then upsetting and punching are carried out in a die, a core penetrating shaft is drawn in a V-shaped anvil, the square body is formed by forging on a flat anvil, and finally correcting and forming are carried out in the die; and (2) heat treatment is carried out, wherein normalizing is carried out after forging, normal tempering is carried out after rough machining, and then sub-temperature quenching and high-temperature tempering are carried out. Compared with the prior art, the hook cylinder manufactured by the method isfewer in defect, good in low-temperature toughness, high in nondestructive inspection qualification rate, small in size and high in production efficiency is high; and meanwhile, the hook cylinder hasthe interchangeability with an original casting structure, the quality grade is in accordance with the PSL2 of Spec 8C of the American Petroleum Institute (API), and the use requirements of the minus60 DEG C polar environment are met.

Description

technical field [0001] The invention relates to the field of petroleum drilling rig manufacturing, in particular to the design and manufacture of traveling block hook parts for lifting downhole drill strings, drilling tools, water taps and the like. Background technique [0002] The traveling block hook is a key component on the main load path of the drilling rig, and its function is to hang the swivel, lift the drill string and drilling tools, lift the derrick and the base. The hook manufacturing standard of the traveling block implements the API Spec 8C specification of the American Petroleum Institute. This specification puts forward very high requirements for the lifting system. (-20°C) ≥ 42J, and the polar environment temperature is -45~-60°C, Akv (-60°C) ≥ 27J is required. The hook cylinder, the key part on the hook of the traveling block, bears all the working loads. Because of the special shape and thick wall of the hook cylinder, it is very difficult to forge acco...

AI Technical Summary

Problems solved by technology

[0003] The existing cast hook barrels mainly have the following problems: many casting defects (hot cracks, pores, inclusions, shrinkage porosity, etc.), low pass rate of non-destructive testing, low temperature impact energy cannot meet the requirements of -60°C, and many delayed defects. Difficult to meet the quality requirements of PSL2 in API Spec 8C

In addition, in order to meet the needs of non-destructive testing and spraying, the surface of the casting is manually polished as a whole, which is inefficient and requires a lot of labor.

At present, due to the casting parts, there is no PSL2 oil drilling rig traveling car hook suitable for -60°C polar environment.

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