Study On The Hammering Depth Of Offshore Drilling Conductors

For jacket platforms,Hammering method is commonly used for drilling and drilling.To protect the safety of offshore drilling and avoid complicated accidents such as instability and subsidence at the wellhead due to the fact that the conductors cannot fully support the top load.This paper mainly studies the drilling depth and wellhead stability of drilling conductors.Firstly,analyzes the construction process of the conductor under the hammering method,and cleared the risk control measures.Secondly,performed the calculation of the minimum depth in the soil of the conductors to meet the requirements of normal fluid circulation conditions and bearing capacity.Then,the mechanical analysis model of the conductor was established,and the strength check and stability analysis of the conductor were completed.Finally,an example analysis was performed on the target oil fields,and the reliability and accuracy of the reasonable mud depth calculation method for the drilling conductor proposed in this paper are verified.Combining theory with case analysis,this paper forms a set of comparatively perfect calculation methods for reasonable mud depth of conductor.This method is verified in the example analysis to meet the requirements of field operations.This method can provides scientific basis for offshore engineering design and site construction.