Design And Research On The Structure Of Special Transport Vehicle For Blowout Prevention Equipment

The blowout prevention technology is a new type of well repairing technology, which is used to inject air into the well in the oil field to inject air into the well in order to reach the pressure of oil field work. The popularization and the use of blowout prevention technology avoid the waste of resources and environmental pollution which is caused by the way of traditional in the two repair process of oil field. However, the structure of blowout prevention equipment which the structure is complex and the volume is huge, these disadvantage factors lead to transportation and disassembly process which is complex. Besides, the cost of repairing well is increased, and the production efficiency is low. In the harsh field environment, there are larger security risks during the process of disassembly and transportation. In view of the problems existing in the installation and transportation of blowout prevention equipment, this paper will design and research on the special transport vehicle mounted structure for blowout prevention equipment on the basis of the existing chassis. By modeling, simulation and analysis of the special transport vehicle mounted structure for blowout prevention equipment to complete the research content. The specific work is as follows:Firstly, according to the current transportation and installation method of blowout prevention equipment, combined with the design requirements of the special vehicle, the national standard and the principle of modification, the general design of the structure of special transport vehicle for blowout prevention equipment was carried out. And a kind of lifting mechanism, turning frame and flexible suspension device were put forward. The problem of transportation and installation of blowout prevention equipment was solved.Secondly, this paper analyzed the performance of assembling and interference of the special transport vehicle for blowout prevention equipment by the parametric modeling, and realized the virtual assembly of suits structure. The mathematical model of lifting mechanism established for the force analysis in the process of turning and lifting mechanism kinematics and mechanics analysis. The special transport vehicle for blowout prevention equipment was added constraint, load, drive, by the kinematics simulation analysis, the load force curves of hydraulic cylinder for the uninstallation process was got, and the rationality of the structure and the stability of the special transport vehicle were verified, which ensured the safety and reliability of the working process of the tilting mechanism, and it was used to the finite element analysis and optimization design of the special transport vehicle mounted structure for blowout prevention equipment.Finally, in order to ensure the reliability of the structure under large load, the finite element analysis of the key components of the structure was required. The finite element simulation model was established, and the key components were analyzed by finite element method, and the stress and strain and displacement diagram were obtained. In order to avoid the resonance phenomenon of the structure in the vicinity of the working frequency, the key components of the structure were analyzed. Due to the limitation of the size, internal space and weight of the national standard, based on the lightweight design for the key components of the special transport vehicle mounted structure for blowout prevention equipment, the subframe mass compared to previous was reduced by 20 percent and it was satisfied the design requirements.Through research, the strength of the special transport vehicle mounted structure for blowout prevention equipment met the requirements, loaded and unloaded process designed was reasonable, the stability was well, which can solve the problems of blowout preventer equipment in transportation, environment, safety and other aspects. It also provided reference for the related design.