Reaming While Drilling BHA

As in the oil and gas field development into late oilfield development difficulty increased,annular suffocating pressure,frequent complex situations such as well.In order to guarantee the security underground,drilling,drilling team had to take a short drill and drill wells under eyes,reaming,even plugging and other technical measures,which will seriously affect the drilling time.Wash eyes while drilling tools used in drilling eye in the process,reducing the annular suffocating pressure and complex situations such as well,greatly improved drilling time.First of all through the application of the finite element method,calculate drilling drilling tools of the stress and deformation of the eyes,as a basis for their model of bottom hole Assembly.According to the theory of vertical and horizontal bending beam,eyes are suitable for drilling tool bottom hole Assembly of mechanical parameters of solution,combined with the drill and formation of anisotropic theory,established a bottom hole Assembly parameters design and optimization methods.Second consider to drill column combination by force and deformation of geometry nonlinear,this used small strain large deformation elastic mechanical analysis principle and method to research with drill is zoned eye tool drill with combination by force deformation features,and will expansion eye torque load introduced,established has with drill is zoned eye tool drill with combination by force deformation three dimensional limited Yuan analysis model,model more real to reflect has well Xia drill with combination of deformation and strength characteristics.And integrated drill bits,stabilizers,reaming,drilling and borehole deformation and stress of the contact point,determine drilling expansion BHA mechanical properties at the moment,for evaluation and analysis of mechanical properties of eyes drilling tool drill combo clear mechanical indicators were proposed.