Abstract: A mud pulser includes a connector housing, a motor housing, a ball screw housing, a pressure compensation piston housing, and a filter housing that are tubular in shape and connected serially to form a tubular housing. A pressure compensation piston separates the tubular housing into a proximal portion and a distal portion; a motor resides in the proximal portion; a servo valve resides in the distal portion; a piston shaft is coupled to the motor and extends through the pressure compensation piston into the distal portion. The motor causes the poppet shaft to reciprocate along a longitudinal direction of the tubular housing. The filter housing contains a plurality of slots that extend into an inter cavity of the filter housing.

Abstract: A mud pulser includes a connector housing, a motor housing, a ball screw housing, a pressure compensation piston housing, and a filter housing that are tubular in shape and connected serially to form a tubular housing. A pressure compensation piston separates the tubular housing into a proximal portion and a distal portion; a motor resides in the proximal portion; a servo valve resides in the distal portion; a piston shaft is coupled to the motor and extends through the pressure compensation piston into the distal portion. The motor causes the poppet shaft to reciprocate along a longitudinal direction of the tubular housing. The filter housing contains a plurality of slots that extend into an inter cavity of the filter housing.

Abstract: A mud pulser includes an inlet assembly, a main-valve assembly, a servo-valve assembly, a motor assembly and a collar. The servo-valve assembly has a servo-valve, which includes a servo-valve plugging member and a servo-valve chamber housing the servo-valve plugging member and having a first orifice and a second orifice. A servo-valve shaft is connected to the servo-valve plugging member and configured to be driven to perform a reciprocating movement that causes the servo-valve plugging member to alternately block the first orifice and the second orifice. The alternate blocking of the first orifice and the second orifice triggers movements in the main-valve assembly to restrict or release mud flow to generate mud pulse.

Abstract: An interconnectable downhole instrument package has a downhole instrument disposed in a pressure housing; a male connector assembly connecting to a first end of the downhole instrument; and a female connector assembly connecting to a second end of the downhole instrument. The male connector assembly has a first housing and a male rotatable connector that are connected together, while the female connector assembly has a second housing and a female rotatable connector. The second housing is adapted to receive the female rotatable connector.

Abstract: A mud pulser includes an inlet assembly, a main-valve assembly, a servo-valve assembly, a motor assembly and a collar. The servo-valve assembly has a servo-valve, which includes a servo-valve plugging member and a servo-valve chamber housing the servo-valve plugging member and having a first orifice and a second orifice. A servo-valve shaft is connected to the servo-valve plugging member and configured to be driven to perform a reciprocating movement that causes the servo-valve plugging member to alternately block the first orifice and the second orifice. The alternate blocking of the first orifice and the second orifice triggers movements in the main-valve assembly to restrict or release mud flow to generate mud pulse.

Abstract: An interconnector for connecting downhole instruments includes a male connector assembly and a female connector assembly. The male connector assembly has a first housing and a male rotatable connector that are connected together. The female connector assembly has a second housing and a female rotatable connector. The second housing is adapted to receive the female rotatable connector. The male rotatable connector has a first end having a plurality of cylinders that are sequentially and concentrically connected, and a second end adapted to receive a first plurality of electrical wires, and a first plurality of electrical contacts disposed on the plurality of cylinders. The female rotatable connector has a first end having a cavity having a plurality of steps adapted to receive the plurality of cylinders in the male rotatable connector, and a second end adapted to receive a second plurality of electrical wires.

Abstract: An interconnector for connecting downhole instruments includes a male connector assembly and a female connector assembly. The male connector assembly has a first housing and a male rotatable connector that are connected together. The female connector assembly has a second housing and a female rotatable connector. The second housing is adapted to receive the female rotatable connector. The male rotatable connector has a first end having a plurality of cylinders that are sequentially and concentrically connected, and a second end adapted to receive a first plurality of electrical wires, and a first plurality of electrical contacts disposed on the plurality of cylinders. The female rotatable connector has a first end having a cavity having a plurality of steps adapted to receive the plurality of cylinders in the male rotatable connector, and a second end adapted to receive a second plurality of electrical wires.

Abstract: A pulser for generating pressure pulses propagating through a column of drilling fluid in the drill string to the surface during drilling. The pulser may include a screen in the surface of a tubular housing to permit mud from the mud stream to enter into the pulser; an adjustable servo valve configured to receive the mud and including a removable servo poppet and a removable servo orifice member positioned in the tubular housing, wherein the adjustable servo valve is configured to allow the removable servo poppet and the removable servo orifice member to be replaced by another removable servo poppet and another removable servo orifice member to alter an inner diameter of an orifice of the adjustable servo valve to accommodate drilling conditions to increase a performance of the pulser generating pressure pulses for the mud stream returning to the surface.

Abstract: A pulser for generating pressure pulses propagating through a column of drilling fluid in the drill string to the surface during drilling. The pulser may include a screen in the surface of a tubular housing to permit mud from the mud stream to enter into the pulser; an adjustable servo valve configured to receive the mud and including a removable servo poppet and a removable servo orifice member positioned in the tubular housing, wherein the adjustable servo valve is configured to allow the removable servo poppet and the removable servo orifice member to be replaced by another removable servo poppet and another removable servo orifice member to alter an inner diameter of an orifice of the adjustable servo valve to accommodate drilling conditions to increase a performance of the pulser generating pressure pulses for the mud stream returning to the surface.