Marine rig derrick stress test tool

Abstract

The invention relates to a marine rig derrick stress test tool, and belongs to the field of petroleum equipment stress test devices. The marine rig derrick stress test tool is mainly composed of a girder, a left support block, a right support block, a main lifting lug, auxiliary lifting lugs, a loading shaft, a backing board and support reinforcement boards, wherein the left support block and the right support block are symmetrically welded at the two ends of the upper surface of the girder; the auxiliary lifting lugs are symmetrically welded onto two lateral end surfaces, between the left support block and the right support block, of the girder; the main lifting lug is welded at the bottom of the girder and between the auxiliary lifting lugs. According to the marine rig derrick stress test tool, the girder adopts the box structure internally equipped with the support reinforcement boards, so that strength, rigidity and stability of the girder are ensured and weight of the girder is greatly reduced at the same time; in addition, the common non-loading shaft type main lifting lug is replaced with the loading shaft and welded at the lower part of the girder, so that the stress on the main lifting lug and the girder weld can be greatly reduced, the weld failure can be avoided, and the test safety is ensured.

Description

technical field [0001] The invention relates to a stress test tool for a derrick of an ocean drilling rig, belonging to the field of stress test devices for petroleum equipment. Background technique [0002] Due to the long-term work of offshore drilling rigs in corrosion and dynamic stress environments, defects such as corrosion and cracks are prone to occur in the derrick structure, thereby reducing the bearing capacity of the derrick. Stress test is an important means to evaluate the bearing capacity of the derrick of the offshore drilling rig. During the test, special tooling is required to load the derrick. Due to the particularity of the structure of the offshore drilling rig, certain requirements are also put forward for the stress test tooling. The design takes into account size and weight constraints while maintaining structural strength and rigidity. The main load-bearing components of the current offshore drilling rig test tooling are made of H-shaped steel, whi...

AI Technical Summary

Problems solved by technology

The main load-bearing components of the current offshore drilling rig test tooling are made of H-shaped steel, which is more suitable for stress testing of small offshore drilling and repairing rigs. However, when used for large offshore drilling rigs, the structural weight is obviously too high. When the capacity limit of the lifting equipment on the drilling rig is exceeded , will bring great inconvenience to the test

Images