Abstract: A pulser system and method of operation for creating pressure pulses for pulse telemetry for measure while drilling tools using a direct drive. The method includes the step of activating an electric motor and thereby turning a motor shaft. Next, turning a threaded shaft by rotation of the motor shaft and translating a ball screw nut along the threaded shaft responsive to turning the threaded shaft. The next steps are translating a piston rod within a cylinder housing by a linear positioner responsive to translating the ball screw nut and moving a poppet coupled to the piston rod to create the pressure pulses.

Abstract: A pulser system and method of operation for creating pressure pulses for pulse telemetry for measure while drilling tools using a direct drive. The method includes the step of activating an electric motor and thereby turning a motor shaft. Next, turning a threaded shaft by rotation of the motor shaft and translating a ball screw nut along the threaded shaft responsive to turning the threaded shaft. The next steps are translating a piston rod within a cylinder housing by a linear positioner responsive to translating the ball screw nut and moving a poppet coupled to the piston rod to create the pressure pulses.

Abstract: Creating pressure pulses for pulse telemetry for MWD tools using direct drive. Example embodiments include activating an electric motor of the MWD tool, and thereby turning a motor shaft. Rotating the motor shaft may cause turning of a threaded shaft. Turning the threaded shaft may cause a ball screw nut to translate along the threaded shaft. Translating the ball screw nut may cause translating a piston rod within a cylinder housing. Translating the piston rod may cause movement of the poppet coupled to the piston rod.

Abstract: Creating pressure pulses for pulse telemetry for MWD tools using direct drive. Example embodiments include activating an electric motor of the MWD tool, and thereby turning a motor shaft. Rotating the motor shaft may cause turning of a threaded shaft. Turning the threaded shaft may cause a ball screw nut to translate along the threaded shaft. Translating the ball screw nut may cause translating a piston rod within a cylinder housing. Translating the piston rod may cause movement of the poppet coupled to the piston rod.

Abstract: A pulser for generating positive pressure mud pulses includes a signal shaft disposed to move between an up position and a down position within a ceramic shaft seal, the signal shaft connected at a top end to a drive shaft, the signal shaft sealing a poppet orifice when in the down position, wherein the drive shaft is connected to an actuator, the actuator connected to a hybrid bearing and a pulser coupling. The pulser is contained in a drill collar and configured to connect to a bottom end assembly. The pulser includes a pressure compensation membrane.

Abstract: Creating pressure pulses for pulse telemetry for MWD tools using direct drive. Example embodiments of creating the pressure pulses include: activating an electric motor and thereby turning a motor shaft; turning a threaded shaft by rotation of the motor shaft; translating a ball screw nut along the threaded shaft responsive to turning the threaded shaft; translating a piston rod within a cylinder housing by the linear positioner responsive to translating the ball screw nut; moving the poppet coupled to the piston rod; counting electronic pulses from a sensor that senses full or partial rotations of the motor shaft, the counting creates a count value; and ceasing activation of the electric motor when the count value meets or exceeds a set point count value proportional to a predetermined travel distance of the poppet.

Abstract: A pulser for generating positive pressure mud pulses includes a signal shaft disposed to move between an up position and a down position within a ceramic shaft seal, the signal shaft connected at a top end to a drive shaft, the signal shaft sealing a poppet orifice when in the down position, wherein the drive shaft is connected to an actuator, the actuator connected to a hybrid bearing and a pulser coupling. The pulser is contained in a drill collar and configured to connect to a bottom end assembly. The pulser includes a pressure compensation membrane.

Abstract: A pulser for generating positive pressure mud pulses includes a signal shaft disposed to move between an up position and a down position within a ceramic shaft seal, the signal shaft connected at a top end to a drive shaft, the signal shaft sealing a poppet orifice when in the down position, wherein the drive shaft is connected to an actuator, the actuator connected to a hybrid bearing and a pulser coupling. The pulser is contained in a drill collar and configured to connect to a bottom end assembly. The pulser includes a pressure compensation membrane.