Application of integrated HD-4002B well logger in deep scientific drilling project of uranium

To meet the demand of the first deep scientific drilling project and the HD-4002B was developed on the basis of the composite well logger HD-4002, HD-4200B is with the feature of 3000 meter logging depth, employing PASF and fluororubber 'O' ring to resolve the sealing and insulation under high temperature and high pressure circumstance, and applying switching power supply technique to to the depth was the first realize high power supply to probe to reduce armor line loss. It had successfully surveyed of 2818 meter in the first depth uranium scientific borehole finished in May 2013, and it time in the deep uranium deposit prospecting. (authors)