The Design Of The Top-Excited Vibration Jam Releasing Device And The Research On The Jam Releasing Mechanism

In the process of oil drilling and production,the phenomenon that downhole drilling and production tools cannot normally perform drilling and production operations due to geological or other engineering factors is often called the stuck phenomenon.The prone to sticking phenomenon not only seriously interferes with the drilling schedule,but also causes the cost of large-scale drilling.Therefore,in order to eliminate the sticking accident efficiently and at low cost,this article combines relevant research at home and abroad,taking the top-excited vibration-free technology as the research object,and launches related research on the structure and mechanism of the top-excited vibration-free device and explores the top The feasibility of the technology of stimulating the jamming.Through the analysis of the working principle of the vibration release technology,the structure design of the ground vibration release device is carried out.The symmetrical counter-rotating eccentric block is used to generate periodic and continuous longitudinal excitation force.The disc spring can withstand large loads in a small space and has good buffering and vibration absorption capabilities.The motor-driven hydraulic motor is a jam release device Provided technical solutions such as power,and designed the vibration module,vibration isolation module and drive system of the top vibration and jam release device.In order to clarify the mechanism of top-excited vibration to release the stuck,the longitudinal vibration behavior of the stuck drill string was analyzed,the mechanical model of the stuck drill string longitudinal vibration was established,and the spring-mass-damping method was used to obtain the longitudinal vibration of the stuck drill string.Control the equation of motion.Among them,a drilling fluid damping model was established to explain the damping force generated by the drilling fluid during the vibration process.Finally,the state space method is used to solve the control motion equation of the longitudinal vibration of the drill string under the stuck pipe,and the mechanical characteristics of the longitudinal vibration of the drill string under the stuck pipe are obtained.The mechanism of jam release was analyzed,and models of shear stress distribution of drill string in the stuck section during vibration and similar fatigue release models based on fatigue failure mechanism were established respectively.The ANSYS software was used to verify the shear stress distribution of the stuck drill string during the vibration process.The simulation results are consistent with the theoretical analysis conclusions;the parameters of the top vibration release device and the longitudinal vibration behavior of the stuck drill string are analyzed by MATLAB.The combination of fatigue jam release mechanism realizes the entire jam release process of the stuck drill string,and preliminarily determines the jam release operation parameters under different working conditions,further verifying the feasibility of the top vibration release technology.On the basis of the above research,this paper also carried out the relevant research on the vibration sensitivity of the top vibration release device-drill string-formation coupling system,and analyzed the parameters of different formation parameters,environmental parameters,drill string state parameters and working parameters.The law of influence caused by the longitudinal vibration of the stuck drill string.As a result,the parameters of the jam release operation under different working conditions are determined,the optimal jam release plan is provided for the jam release operation,and the structural design of the top vibration jam release device is proposed,which provides a solid theory for the top vibration jam release technology in accordance with.