low pressure housing 44 and into a wellbore 46 that is formed through a formation 48 beneath sea floor 40 a transition 49 shown having a thickness reduction with distance from low pressure tubular 42 connects low pressure housing 44 and conductor 45 a weld 50 shown providing connection between conductor 45 and transition 49 coaxially disposed within low pressure tubular 42 is a high pressure tubular 52 that includes a high pressure housing 54 shown set coaxially within low pressure housing 44 similar to the low pressure tubular 42 a conductor 55 depends downward from high pressure housing 54 into wellbore 46 a weld 50 connects an upper end of conductor 55 with a transition 56 which couples to a lower end of high pressure housing 54 similar to transition 49 high pressure transition 56 has a thickness that reduces with distance from high pressure housing 54 further in example of fig3 magnetized areas 18 are shown provided at strategic locations on the tubulars 42 52 more specifically magnetized areas 18 are formed on an inner surface of low pressure tubular 42 which in one example provides some protection for the associated sensor systems 20 during installation of low pressure housing 42 within wellbore 46 an outer surface of high pressure tubular 52 is shown having magnetized areas 18 and with sensor systems 20 set along those areas so that its sensors 22 can sense magnetic field changes that occur when stresses are.