53results about How to "Avoid Repeated Fragmentation" patented technology

The invention belongs to the field of drilling equipment and particularly relates to a hydraulic percussion rotary reverse circulation drilling device. The hydraulic percussion rotary reverse circulation drilling device comprises a reverse circulation drill bit, a reverse circulation faucet, a power head and a hydro-percussive hammer and is characterized in that the lower end of a drill bit body in the reverse circulation drill bit and the lower end of a casing shoe are sealed through a seal ring, a flow guide sleeve is fixedly connected onto the inside of the lower end of the drill bit body, the upper surface of the flow guide sleeve is higher than a through hole, the water inlet in the reverse circulation faucet is formed in one side of a water jacket and penetrates a sleeve joint to be communicated with a high-pressure circulating water channel, the water jacket is sleeved outside the sleeve joint and is fixed through a snap spring, a seal ring is arranged between the sleeve joint and the water jacket, a deslagging opening is formed in one side of a percussion rotary joint and is communicated with a magma reverse central channel, a hydraulic motor of the hydro-percussive hammer is fixed on a mounting base and is connected with a reversing valve core, the mounting base is fixed on a rear shell and the upper end of a reversing valve sleeve, and the reversing valve sleeve is arranged inside the rear shell and sleeved outside the reversing valve core. The hydraulic percussion rotary reverse circulation drilling device can be used for performing efficient construction in water-free gravel-cobble stratums.

The invention discloses a process and a device for the reverse circulation execution of a single rope impact drill, the reverse circulation execution device comprises a percussion drill, a slurry pumping pipe at the hole bottom and a slurry purifier at the hole mouth, the drill bit is composed of a drill bit body and a cutting blade, the drill bit body is composed of a hammer body, corner boardsand a base, the upper end of the hammer body is provided with a connecting hold connected with a non-rotating rope, the corner boards are distributed in the same angle axially on the cylindrical or circular-tube-shaped hammer body, the base is composed of coaxial inner base and outer base, which are tube-shaped, the upper surfaces of the two base are in the same plane, the inner base is higher than the outer base, the lower ends of the corner boards are connected with the two bases, the hammer body, the corner plate and the base are integrated by welding, casting or riveting, the lower end ofthe base is evenly equipped with multiple cutting blades; pile types of various section shapes can be dilled by the drill bit, the reverse circulation process of hole bottom slag pumping is used whendrilling, the execution process is fastened, the energy consumption is reduced, the slag is cleaned completely and clearly, the time for cleaning the hole is shortened.

The invention relates to the technical field of drilling tools, in particular to an internal chip removal drill bit combined with a PDC and a single cone. The internal chip removal drill bit includes a single cone bit and a PDC drill bit with a main body. The height direction of the main body has a main flow channel and an inner chip removal channel. The inner chip removal channel includes a first flow channel, a second flow channel and a top of the main body. Facing the downwardly extending upper flow channel, the first flow channel extends downward from the upper flow channel to the main channel and is set to reversely discharge the initial drilling fluid in the main channel to form a reverse pressure difference, and the second flow channel extends from the upper flow channel to the main channel. Extending down to the bottom surface of the main body and set to be able to extract the cuttings-carrying drilling fluid at the bottom surface of the main body under the pressure difference of the first flow channel, the single-cone bit is installed at the bottom of the main flow channel and is set to be able to break rock together with the PDC bit . The PDC and single-cone composite internal chip removal bit is jointly formed by the single-cone bit and the PDC bit, so that the PDC bit and the single-cone bit simultaneously break rocks and improve drilling efficiency.