Mud pulser having a filter housing

A pulser for generating pressure pulses in a drilling fluid during a drilling operation, comprising:

• 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 separating the tubular housing into a proximal portion and a distal portion;
• a motor residing in the proximal portion;
• a servo valve residing in the distal portion;
• and
• a poppet shaft coupled to the motor and extending through the pressure compensation piston into the distal portion, wherein the motor causes the poppet shaft to reciprocate along a longitudinal direction of the tubular housing,
• wherein the connector housing contains a rotatable connector assembly having a female rotatable connector and a male rotatable connector inserted into the female rotatable connector,
• wherein the filter housing is tubular in shape and comprises a plurality of straight slots, each straight slot has an elongated opening on a circumference of the filter housing having a length direction thereof arranged in parallel with a longitudinal direction of the tubular housing and extend into an inter cavity of the filter housing,
• wherein the filter housing further comprises a proximate member and a distal member disposed on each side of the inter cavity, the proximate member has a through-hole in the center thereof and a plurality of grooves extending radially from an opening of the through-hole toward an outer surface of the filter housing, each groove is connected to one of the plurality of straight slots,
• wherein the servo valve comprises a poppet detachably affixed to the poppet shaft and an orifice member having an orifice that allows the drilling fluid to pass, the orifice member is detachably disposed inside the distal member of the filter housing, and
• wherein a reciprocating motion of the poppet shaft causes the poppet to close or open the orifice, thereby stopping or releasing a flow of the drilling fluid through the pulser.