The present invention relates to a drill bit assembly for fluid-operated percussion drill tools. The drill bit assembly comprises a percussion bit having a head portion formed with an axially extending shank, a first plurality of axially extending splines on the shank slideably engageable with a first plurality of complementary splines formed internally of a drive chuck whereby rotational drive from the chuck may be transmitted to the shank. The assembly also comprises engagement means on the chuck adapted for connecting the chuck to a drive means of the fluid-operated percussion drill tool. During drilling, the bit and the chuck are held in a first relative orientation in which the bit is retained in the chuck, and the bit is moveable axially relative to the chuck to a bit removal position, in which the bit is rotatable relative to the chuck to a second relative orientation in which the bit is removable from the chuck. The bit is moveable to the bit removal position while the chuck is fully engaged with the drive means.

The present invention relates to a drill bit assembly for fluid-operated percussion drill tools. The drill bit assembly comprises a percussion bit having a head portion formed with an axially extending shank, a first plurality of axially extending splines on the shank slideably engageable with a first plurality of complementary splines formed internally of a drive chuck whereby rotational drive from the chuck may be transmitted to the shank. The assembly also comprises engagement means on the chuck adapted for connecting the chuck to a drive means of the fluid-operated percussion drill tool. During drilling, the bit and the chuck are held in a first relative orientation in which the bit is retained in the chuck, and the bit is moveable axially relative to the chuck to a bit removal position, in which the bit is rotatable relative to the chuck to a second relative orientation in which the bit is removable from the chuck. The bit is moveable to the bit removal position while the chuck is fully engaged with the drive means.

A drill bit for chiseling stone includes an impact face at an insertion end of the drill bit, a hollow shank, where a delivery passage is defined within the hollow shank, and a drill head, where the drill head has, at a front end of the drill head, a cutting edge, an intake opening, and an intake passage. The intake passage connects the intake opening to the delivery passage. A cross section of the intake passage increases from the intake opening to the delivery passage.

A drill bit for chiseling stone includes an impact face at an insertion end of the drill bit, a hollow shank, where a delivery passage is defined within the hollow shank, and a drill head, where the drill head has, at a front end of the drill head, a cutting edge, an intake opening, and an intake passage. The intake passage connects the intake opening to the delivery passage. A cross section of the intake passage increases from the intake opening to the delivery passage.

A system for removing debris from a drill hole, the system comprising a drill rod, a first lumen extending through the drill rod, and a second lumen extending parallel to the first lumen; a drill bit for mounting to the drill rod, the drill bit being configured to form the drill hole; at least one air channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one air channel being configured to be fluidically connected to the first lumen of the drill rod; at least one vacuum channel extending between the proximal end of the drill bit and the distal end of the drill bit, the at least one vacuum channel being configured to be fluidically connected to the second lumen of the drill rod; and a container fluidically connected to the second lumen of the drill rod.

A percussion boring device comprising a casing, a guide tube fixed to the casing, and a control bushing axially displaceable on the guide tube. An impact piston of the device is axially displaceable on the control bushing and configured to be actuated in a reciprocating manner within the casing such that in a first switching position the impact piston strikes a front impact surface to actuate the percussion boring device in a first movement direction, and in a second switching position a rear impact surface to actuate the percussion boring device in a second movement direction. A pressure increasing means is provided and configured to generate a pressure for reversing the percussion bore device, wherein the generated pressure is higher than a pressure for moving the impact piston. The guide tube and the control bushing are configured to reverse movement directions of the impact piston.

An ultra-hard cutting element for use in a drill bit, such as a percussion drill bit, a rotary cone drill bit, a drag bit, or a reamer. The ultra-hard cutting element includes a base portion, an extension portion on an end of the base portion, and a lip on an outer surface of the extension portion. At least a portion of the outer surface of the extension portion includes an ultra-hard abrasive material. The ultra-hard abrasive material may be polycrystalline diamond or polycrystalline cubic boron nitride.

An ultra-hard cutting element for use in a drill bit, such as a percussion drill bit, a rotary cone drill bit, a drag bit, or a reamer. The ultra-hard cutting element includes a base portion, an extension portion on an end of the base portion, and a lip on an outer surface of the extension portion. At least a portion of the outer surface of the extension portion includes an ultra-hard abrasive material. The ultra-hard abrasive material may be polycrystalline diamond or polycrystalline cubic boron nitride.

The disclosure discloses a percussion and cutting composite drilling tool, which relates to the field of drilling equipment and is mainly used to solve the problems of low working efficiency and high wear rate of drill bit existed in breaking rocks only by cutting effect. The main structure comprises a PDC drill bit and a percussion drill bit, which is characterized by a percussion structure directly connected to the percussion drill bit. The disclosure provides a percussion and cutting composite drilling tool, which is suitable for strata under different geological conditions and has higher construction efficiency and lower bit wear.

The disclosure discloses a percussion and cutting composite drilling tool, which relates to the field of drilling equipment and is mainly used to solve the problems of low working efficiency and high wear rate of drill bit existed in breaking rocks only by cutting effect. The main structure comprises a PDC drill bit and a percussion drill bit, which is characterized by a percussion structure directly connected to the percussion drill bit. The disclosure provides a percussion and cutting composite drilling tool, which is suitable for strata under different geological conditions and has higher construction efficiency and lower bit wear.