Abstract: A downhole power generator module having a body with one or more couplings that are configured to connect the body to a downhole tool string positioned downhole in a wellbore. An axial passageway is formed through the outer housing and couplings. The power generator module has a pressure-driven electric generator such as a triboelectric or piezoelectric generator positioned within the body. A port in the body enables communication of well fluids from the wellbore to the generator. Pressure changes in the well fluids are communicated to the pressure-driven electric generator, causing it to autonomously generate electric power downhole. The generated power is provided directly to other downhole tools without intervention from the surface.

Abstract: A device for accessing a body orifice is disclosed. The device may include a speculum body having an outer shell and an inner shell nested within the outer shell. A plurality of fluidic channels may be defined in the interstitial space between the inner and outer shells. The outer shell may be configured as an optical waveguide. The inner shell central bore may be configured for viewing and suction. The device may include a speculum body having a tapered shape. The body may be expandable to expand muscles surrounding a body orifice. Programmable controllers, viewing, recording, and communications systems are also described. Methods of using and forming the devices are also described.