The two electrically conductive portions are part of a downhole casing, a downhole liner, a completion, a production tube, or a downhole tool.

Furthermore, the invention relates to a downhole operation method for operating the downhole driving tool of the downhole system.

down-hole high resolution seismics

downhole safety equipment

An apparatus for evaluating downhole fluids is disclosed.

A fluid actuated downhole tool for inducing movement of a downhole apparatus is described.

The method may also include estimating a change in the condition of the downhole feature after the treatment of the downhole feature.

- A bottom hole assembly for annular hole-making with core storage, transportation, down-hole closed loop discharge fluid circulation.

An apparatus for communicating a signal downhole includes a downhole pipe configured to be coupled to another downhole pipe and a protection tube secured to the downhole pipe.

A device is disposed in a downhole environment of the borehole to perform the downhole operation.

Disclosed herein is a downhole cutting tool.

The lower coupling suspends the downhole electrical equipment from the conductors and electrically couples the conductors to the downhole equipment.