Pressurized system for protection of transfer capacity of signal in a town of subsuperfu00eccie and method for formation of a connection between a tube and a tool in an environment of ALTThe pressure

摘要

To prevent damage to signal transmission lines 30, such as electric cable or optical fibres, they are incased by flexible, rigid, or semi-rigid tubing 34, that extends from the surface down to a connector 38 and a tool 26, such as a packer, flow metre or control valve. The tube 34 and connector 38 are filled with fluid 40 such as high density, hydraulic, or dielectric liquid, and a pump 42 maintains the fluid pressure so that it is greater than the external pressure, so preventing inward flow of wellbore fluids, even if a leak occurs, and this can also be used for hydraulic control of tools. The signal line 30 may be surrounded by insulation (fig. 4, 48), have a physical support (fig. 6b, 57), be connected to a float (fig. 6b, 54), or have a plurality of wings (fig. 6b, 59). A penetrator (fig. 8, 74) is provided for isolating zones (fig. 8, 76, 78), with a check-valve (fig. 8, 88) that prevents back-flow, whilst allowing the signal line 30 to pass through. The connector 38 has a tool connection portion (fig. 7, 60), and a connection chamber (fig. 7, 64) and allows the signal line 30 to pass through.