G and S: Oil and gas well services providing downhole-to-surface, surface-to-downhole and/or downhole-to-downhole data telemetry, telemetry tool utilization and optimization consulting and data processing for the oil and gas drilling; rental of hardware and equipment and related software for oil and gas drilling, namely, data telemetry transmitters, data telemetry receivers, centralizers for downhole tools, gap subs, surface equipment for receiving uplink data telemetry, automated control systems, electronic interfaces for control systems, pulse valves, downhole measurement and logging tools comprising sensors, data telemetry components, and connectivity devices for establishing downhole networks, namely, data telemetry transmitters and receivers, tool-to-tool interface probes, surface equipment for transmission and reception of telemetry, namely, display computers, surface decoder and encoder software, surface antenna rods, and/or surface downlink stakes, cables and connections, probe and tool carrier subs, probe and tool centralizers, and/or data collection, data reporting, and system control firmware and software for oil and gas drilling; repair, maintenance and cleaning of hardware and equipment and related software for oil and drilling, namely, data telemetry transmitters, data telemetry receivers, centralizers for downhole tools, gap subs, surface equipment for receiving uplink data telemetry, automated control systems, electronic interfaces for control systems, pulse valves, downhole measurement and logging tools comprising sensors and data telemetry components, and connectivity devices for establishing downhole networks, namely, data telemetry transmitters and receivers, tool-to-tool interface probes, surface equipment for transmission and reception of telemetry, namely, display computers, surface decoder and encoder software, surface antenna rods, and/or surface downlink stakes, cables and connections, probe and tool carrier subs, probe and tool centralizers, and/or data collection, data reporting, and system control firmware and software for oil and gas drilling