Research On The Drilling Tool Structure And Its Supporting Simulate Device Of EM-MWD Applied To The Deep Hole

MWD technology is widely used for drilling production such as oil drilling, geological exploration and mineral exploration drilling. It is an important technical support, especially in the directional deviated well, horizontal well drilling and multi-branch wells. This paper is based on the advanced electromagnetic wave measurement while drilling (EM-MWD) technology and equipment in the international, to study the electromagnetic wave measurement while drilling technology. The common surveying instruments can’t satisfy the technical requirements When drilling deep well and ultra deep well. EM-MWD system can control drilling trajectory and the guidance of drilling, improve production efficiency. By accurately measured the bottom hole parameters, real-time transmission signal. In order to meet the needs of the deep continental scientific drilling, the researched electromagnetic wave measurement while drilling system not only can bear high temperature and high pressure drilling is strong vibration and other bad environment, but also in deep well and ultra deep well would not distortion in the signal transmission. Therefore, it’s important that learning form foreign advanced electromagnetic wave measurement while drilling technology, design a independent electromagnetic wave measurement while drilling system, and design a set of simulations of deep well environmental resistance to high temperature and high pressure device, used for simulate signal transmission test in deep well.Based on the electromagnetic wave measurement while drilling technology and well-understanding of the general structure and the principle of foreign advanced equipment, though working together with other teammates, this paper designed and developed an EM-MWD system and optimized and redesigned part of this structure as well as processing molding. In order to testing the reliability and stability, a series of indoor air pressure test and field test was carried. The air pressure test is aimed to detect the tightness of insulating bush, while field experiment is a comprehensive test on the instrument as a whole, including the signal transmission stability and reliability of the structure. In order to achieve the desired goal and lay the foundation for the next step research work, having a research on several important factors affecting the signal transmission of electromagnetic waves in the process of field experiment, such as formation factors, and put forward solution based on analysis the problems and shortcomings in the process of test.At the same time, combined with the project requirements, designing the device of resistant high temperature and high pressure that was apply for simulated conditions of deep well, combined with the design manual and specification, it designed the device of resistance to high temperature and high pressure, then put it to three-dimensional (3d), and used relevant simulation analysis software to force analysis on the structure, so that we could validate the feasibility of the device, and then carries optimization on the design. The designed resistance to high temperature and high pressure device could provide the simulation condition for electromagnetic wave measurement while drilling system.Combined with resistance to high temperature and high pressure device, and in order to get signal transmission between the temperature and pressure and the related performance parameters and confirms the feasibility of on-site signal transmission test, using the software to thermal magnetic analysis on measure system,so it make a prepare for deep well and ultra deep well test.