Abstract: A sonde housing for a fluid-actuated percussive impact tool includes a sonde compartment formed in the sonde housing and defining an open side along an exterior side surface of the sonde housing. A sonde is removably secured in the sonde compartment, and a cover is removably mounted upon the open side of the sonde compartment to close the open side thereof.

Abstract: A fluid-actuated directional percussive impact tool includes a back head for connection to a pressurized fluid source and a tool casing housing a drill bit longitudinally movable with respect thereto. The drill bit has a central axis extending longitudinally therethrough. A sonde housing is coupled between the back head and the tool casing and has a sonde disposed therein. The sonde housing has a central axis extending longitudinally therethrough. A bent sub is integrally formed with the sonde housing and connects the sonde housing to the tool casing such that the central axis of the drill bit intersects the central axis of the sonde housing at a non-zero angle.

Abstract: A fluid-actuated directional percussive impact tool includes a back head for connection to a pressurized fluid source and a tool casing housing a drill bit longitudinally movable with respect thereto. The drill bit has a central axis extending longitudinally therethrough. A sonde housing is coupled between the back head and the tool casing and has a sonde disposed therein. The sonde housing has a central axis extending longitudinally therethrough. A bent sub is integrally formed with the sonde housing and connects the sonde housing to the tool casing such that the central axis of the drill bit intersects the central axis of the sonde housing at a non-zero angle.

Abstract: An improved fluid actuated percussive impact tool of the valveless type adapted for down hole drilling is provided. The impact tool includes a casing, a back head, a distributor located at a first end of the casing, and an impact receiving device located at a second end of the casing. A chamber is located between the distributor and the impact receiving device. A cylinder sleeve is located in the chamber adjacent to the distributor. A first pressurized fluid passage is located between the casing and the cylinder sleeve for passing pressurized fluid from the distributor to the chamber. A piston is located in the chamber for reciprocating axial movement. Axially extending ports are located on at least one of the piston, the cylinder sleeve and the casing in the chamber for alternately supplying pressurized fluid to upper and lower chamber portions.