Abstract: A measurement tool for use in pneumatic percussion drilling comprises a body comprising one or more measuring instruments positioned in a drill string above a pneumatically operated hammer of the drill string.

Abstract: A damper apparatus for use in pneumatic percussion drilling comprises a body having one or more damper apparatus supporting a measuring instrument. Each damper apparatus dampens shock/vibration from the pneumatic percussion drilling that is experienced by the measuring instrument.

Abstract: A drill rod for transferring torque comprises a casing for connection in a drill string. The casing is coupled to an internal body by a torque transferring mechanism at each end of the casing such that torque applied to an end of the drill rod is transferred through both of the casing and the body.

Abstract: A drill rod comprises a body comprising one or more fluid supply channels, a fluid return channel and one or more compartments.

Abstract: One embodiment of a drill rod spacer mover is disclosed. In one embodiment, the drill rod spacer mover comprises a plurality of spacer members each movable to a first position, and a drive transfer arrangement configured operable for receiving drive for moving a body. The body is configured for interacting with a spacer member while moving so as to move same to its first position. The drill rod spacer mover comprises a detent member configured operable for supporting a respective spacer member in its first position when the body moves to interact with another spacer member. More than one drill rod spacer movers can be arranged to form a drill rod spacer mover arrangement for operable use with a drill rod storage assembly.

Abstract: A drill rod handler (30) for use on a drilling rig (10). In at least one embodiment, the drill rod handler (30) comprises a boom (32) having jaws (38) for releasably grasping a drill rod (14) in at least two spaced apart positions along the length of the drill rod, and a boom positioning means for positioning the boom so that the jaws may grasp a drill rod (14) from a rod storage (18) on the drilling rig or from another rod storage at a different location (16). In another embodiment, a drill rod handler comprising a boom having jaws for releasably grasping a drill rod in at least two spaced apart positions along the length of the drill rod, a boom tilt mechanism for raising or lowering an end of the boom and a drill rod when the drill rod is grasped by the jaws; and an interconnect for connection to the end of the boom for stabilising the end of the boom with respect to the a mast (20) of the drilling rig (10) when the boom (32) is in a rod presentation position.

Abstract: A drill rod handler (30) for use on a drilling rig (10). In at least one embodiment, the drill rod handler (30) comprises a boom (32) having jaws (38) for releasably grasping a drill rod (14) in at least two spaced apart positions along the length of the drill rod, and a boom positioning means for positioning the boom so that the jaws may grasp a drill rod (14) from a rod storage (18) on the drilling rig or from another rod storage at a different location (16). In another embodiment, a drill rod handler comprising a boom having jaws for releasably grasping a drill rod in at least two spaced apart positions along the length of the drill rod, a boom tilt mechanism for raising or lowering an end of the boom and a drill rod when the drill rod is grasped by the jaws; and an interconnect for connection to the end of the boom for stabilising the end of the boom with respect to the a mast (20) of the drilling rig (10) when the boom (32) is in a rod presentation position.