Drilling Fluid Solid-liquid Dynamic Pressure To Separate The Simulator Mechanism Analysis And Structural Design

The new type of drilling process puts forward the more demand on the solid control system. The process improves the efficiency of the sepafation of solid and liquid of drilling fluid and the stability of the particles. The present solid control equipment and the whole system should be simplified. In addition, the reduction in the cost of drilling and the environmental pollution of drilling scraps and slurry should also be considered. The equipment is suitable for the low pressure drilling in such areas as the desert, the sea and so on. Therefore people hope to work out the new solid control system with simpler structure, high efficiency and low energy consuming.This paper researches this type of experimental equipment used for the separation of two solid-liquid phase of drilling fluid. This equipment use multiplayer conical mesh. The double motors synchronically run to function as the actuator. It employs several basic theories such as the function of the air pressure, complex swirling, sedimentation and cross-flow and Darcy filter Law. The paper exploits the following aspects about the equipment:1. The paper further analyses the mechanism of double motor linear excitation. This chapter establishes the principle of the realization of auto-synchronization and the condition of auto-synchronization. At the same time, it builds the vibration model of the pressure filter in the experimental equipment. It theatrically analyses and calculates the required amplitude and the exciting force.2. The sedimentation theory, the Darcy filters theory, the cross -flow filter theory and swirling filtration theory are introduced. According to the characteristics of drilling processes and the special physical properties of drilling fluids, the related parameters are defined again. Meanwhile it combines experimental research with the field test and then uses the sedimentation theory to develops a new hydraulic swirling separation model.3. On the basic of work mentioned above, it creatively applies a variety of theory knowledge developed by Ihe solid control laboratory in SWPI and the potent technology to the structure design of this equipment. The three simulate model of the whole equipment and spare parts are built. In accord with this model, there are a lot of two-dimensional drawings. In addition, it takes charge of the manufacture of the equipment.The detailed experiment plan is carried out which is intended to validate the theoretical correction.4. The emphasis is placed on the application of single particle on the conical mesh in the drilling fluids. It analyses the move law on the upper and lower surfaces of the mesh and dynamical characters. The throw movement and tangentially relative movement are discussed.5. From the point view of the applied condition of particles in the drilling fluids, it explains the throw parameters and throw conditions of particles subjected to the pressure flirtation. The movement after the throw time is also discussed.The researches on this paper are part of the project about dynamic excitation machine sponsored by the Chinese Oil and Natural Gas Company. In conclusion, the theoretical analysis and experimental result show that the relative theoretic research on the dynamic separate model of this equipment is correct and the application for the structure design is suitable .At the same time, the work can contribute to the research of dynamical excitation machine in the future.