Abstract: The present invention relates generally to multi-trace electrical connectors for harsh environments. More particularly, the present invention relates to bayonet rotary electrical connectors which maintain electrical connection dynamically, and which may have replaceable connector components. This type of connector is used, for example, in drilling operations where the connector must be rotated, for example during assembly, disassembly, or operation of bottom hole equipment or sensor or communications packages, and where the electrical connection may be maintained.

Abstract: The present invention relates generally to multi-trace electrical connectors for harsh environments. More particularly, the present invention relates to bayonet rotary electrical connectors which maintain electrical connection dynamically, and which may have replaceable connector components. This type of connector is used, for example, in drilling operations where the connector must be rotated, for example during assembly, disassembly, or operation of bottom hole equipment or sensor or communications packages, and where the electrical connection may be maintained.

Abstract: An improved energy efficient intelligent pulser driver used for generating a mud pulse in a MWD (measurement while drilling) application. In the pulser driver, a direct current (DC) powered control circuit activates a three-phase DC brushless motor that operates a servo-valve. Opening of the servo-valve equalizes pressure in a plenum causing the operation of a main valve reducing flow area and causing a pressure spike in the mud column. Closing of the servo-valve creates a reduction in mud pressure that operates the main valve and increases the flow area causing an end to the pressure spike. The servo-valve is powered both in opening and closing operations by the motor.