ZJ70/4500D Drilling Rig Heavy-duty Step-by-step Transport Safety Assessment

With the increase of shale gas well drilling rig,In order to meet the requirements of drilling company.Widely carried out the whole translation of the cluster drilling rig,Shorten the disassembly,installation period and save time cost of the drilling tools.In this paper,the safety of drilling rig system under the condition of heavy load step by step combined with drilling rig is evaluated.Find the weak point of the drilling rig in transit,Make sure the ultimate load of heavy haul transport.To provide technical support for the whole movement of drilling rig.This article mainly focus on the following several aspects of the heavy load transportation of drilling rig:(1)Make analysis on drilling rig system module composition and migration method.Determining the parameters of the drilling unit system,the parameters of the drilling rig.Put forward the simplified hypothesis of rig structure.According to rig system drawings.With the help of ABAQUS finite element analysis software platform.The finite element mechanical analysis model of drilling rig system was established.(2)Detailed calculations of the system load including gravity load,vertical root load,wind load,etc were made.By using the finite element method,the static analysis method of shale gas ZJ70/4500D step cluster drilling rig without considering the combination of wind load and wind load is established.The stress and displacement of dangerous parts are analyzed in detail.The static strength of the rig was respectively evaluated.(3)By using the finite element method,the load transfer mode analysis,the stability analysis and the transient dynamic response analysis method of the ZJ70/4500D step cluster drilling rig are established.The natural frequency and vibration characteristics of the rig are obtained.The critical load and safety factor of nonlinear buckling of drill rig are determined.To determine the ultimate load under the condition of heavy load transfer.Evaluate the safety of drilling rig.(4)In this paper,a test method for the heavy load moving test of shale gas ZJ70/4500D step cluster drilling rig is established.The stress and strain state,the form and frequency of the key parts of the drilling rig under different working conditions are obtained.Focus on the strength of the derrick and the base of the main girder of the check and evaluation.Safety assessment is completed by simulation.(5)Using the above research methods,Aiming at the heavy load movement of ZJ70/4500D step cluster type drilling rig,Determination of the ultimate bearing capacity and safety performance of the drilling rig in the step translation mode.Based on the static and dynamic characteristics.The variation of stress and displacement under static and dynamic loading is obtained.Focus on monitoring the dangerous parts.Determine the strength and ultimate load of the rig.To provide theoretical basis for the safety assessment of heavy load transportation.