61results about How to "Reduce drilling resistance" patented technology

The invention discloses a drill rod with functions of hole protecting, pressure relief and internal slag discharging. The drill rod comprises hollow rod bodies, flow injecting pipes coaxially arrangedin the rod bodies, and supporting pieces connecting the rod bodies with the flow injecting pipes; slag discharging channels are formed between the inner walls of the rod bodies and the outer walls ofthe flow injecting pipes; the flow injecting pipes are internally provided with air inlet and water inlet channels; and with the direction opposite to the rotating direction during drilling of the drill rod bodies as the reverse direction, the outer cylindrical surfaces of the rod bodies are provided with spiral grooves rising in the reverse direction and in cylindrical spiral shapes, and a plurality of pressure relief holes communicating with inner cavities in the rod bodies are formed in the spiral grooves. During drilling of a soft coal seam and an outburst coal seam, the drill rod has theadvantages that the hole protecting ability is high, the slag discharging channels are not prone to being plugged, the hole forming effect is good, the slag discharging and temperature reducing abilities are high, and the hole collapse area is automatically dredged.

The invention discloses a prefabricated screw spike pile, belongs to the field of civil construction engineering and aims at solving the problem an existing foundation pile has lower bearing capacity, low pile body strength and low construction efficiency. The prefabricated screw spike pile disclosed by the invention is formed by a single prefabricated screw pile base body or a plurality of screw spike pile base bodies which are connected, wherein a pile body of the prefabricated screw spike pile base body is a concrete tube body or a hollow conical body, an inner hole of the pile body is in a round or polygon shape, a continuous thread or a continuous buttless thread is arranged on the outer surface of the pile body, at least one through hole is formed in a pipe wall in the axial direction of the pile body, and a pile toe is arranged on the bottom end face of the prefabricated screw spike pile. A prefabricated pile body of the prefabricated screw spike pile disclosed by the invention is formed by high-strength concrete, hole forming can be performed under rotary condition, the prefabricated screw spike pile can be embedded into a soil layer to achieve compression-resistance and tension-resistance effects; the through hole in the pipe wall can form nozzles at the front end of a drill bit in different directions, the purpose of cutting soil can be achieved through high-pressure spraying jet, and pile forming speed is improved.

The invention relates to a robot, in particular to an autonomous seabed deep stratum drilling robot. The autonomous seabed deep stratum drilling robot comprises a head drilling mechanism, a front supporting body section, a pushing body section, a rear supporting body section and a tail control cabin from top to bottom in sequence; the front supporting body section and the rear supporting body section comprise supporting outer cylinders, and a plurality of straight notches are symmetrically formed in the supporting outer cylinders at equal intervals in the axial direction; hydraulic cylinders are arranged in the positions, corresponding to the straight notches, of the supporting outer cylinders, and the hollow hydraulic cylinders are positioned and fixed through connecting flanges; two supporting baffles are vertically arranged on the outer edge of each straight notch, and one ends of the two supporting baffles on each straight notch are connected to form a hinge rotating mechanism; andthe bottom ends of the supporting baffles at the lower ends are positioned and fixed at the tails of the outer walls of the supporting outer cylinders through rectangular fixing pieces, and the top ends of the supporting baffles at the upper ends are positioned and and fixed to the front ends of piston rods of the hollow hydraulic cylinders through rectangular fixing pieces. According to the robot, a multi-section structure is designed, the function of each body section is independent, and the interference problem during assembly and operation is effectively avoided.

The invention discloses a coal-mine broken-soft-coal-seam flexible internal control rotary directional drilling system and method. The drilling system comprises a flexible internal control rotary directional drilling tool, a positioning system, a spiral drill pipe, an openable drill bit and a double-power-head drilling machine; the flexible internal control rotary directional drilling tool is located between the spiral drill pipe and the openable drill bit to achieve rotary directional drilling, the positioning system penetrates the spiral drill pipe to have drilling traces measured, the double-power-head drilling machine includes a large power head and a small power head to provide drilling power, the flexible internal control rotary directional drilling tool comprises a flexible outer pipe, a core bending shaft, a bearing pack and a sleeve, the positioning system comprises an upper non-magnetic drill pipe, a lower non-magnetic drill pipe, an outer exploring pipe, a measuring exploring pipe, a cable-through inner pipe and an explosion-proof computer. By the arrangement, directional drilling and hole protecting of a sieve pipe are realized in a coal-mine broken-soft-coal-seam rotary drilling mode, drilling safety and drilling efficiency are improved, and coal seam drilling-encounter ratio and gas extraction effect are thereby improved.

The invention belongs to drilling tools for pile foundation engineering, and relates to a drill bit for variable diameter drilling. The device is modified and optimized on the basis of a traditional drill bit. The device comprises a drill pipe, a movable knife row mounting base, a movable knife row, an oil cylinder, an oil cylinder mounting base, a pin, a spiral drill bit, the movable knife row isinstalled on the movable knife row base and tightened by the oil cylinder, and the size of opening of movable knife row blades can be controlled by controlling telescoping of the oil cylinder so as to achieve the variable diameter effect. Compared with the prior art, the drill bit has the advantages that drilling and hole expanding are conducted simultaneously, the hole collapse probability is effectively lowered, drilling resistance can be reduced, the drilling efficiency is high, the drilling sticking risk is reduced, and the drilling safety is guaranteed.

The invention provides a straight hole drilling method for a drilling machine, and the straight hole drilling method for the drilling machine is suitable for drilling a gas drainage borehole in an underground coal mine. A drill bit is arranged on a section of round drill rod to start hole drilling operation, after a borehole is drilled by the depth of one section of drill rod, a section of threaded drill rod of which the outer diameter is the same as that of the drill bit is connected with the drill bit, drilling continues to be conducted, a common round drill rod is connected after the threaded drill rod enters the borehole, and drilling is conducted according to a general method till the drill bit reaches the designated position. The straight hole drilling method has the advantages that the drilling trace is straight, operation is simple, and slagging is effective; the problem that the borehole deviates the preset trace due to the fact that the drill bit is unevenly stressed can be effectively solved; and meanwhile, the threaded drill rod is convenient to buy, the cost is low, and the drilling cost is low.

The present invention provides a reinforced drill comprising a first drilling device and a second drilling device. The first drilling device comprises a connecting rod, a connecting barrel, a connecting pipe and a drill pipe. One end of the connecting barrel is closed, and the other end of the connecting barrel is opened. The connecting rod is fixedly connected with the closed end of the connecting barrel. One end of the connecting pipe is in threaded connection with the opened end of the connecting barrel. The other end of the connecting pipe is in threaded connection with the drill pipe. Thediameter of the connecting barrel is greater than that of the connecting pipe. The second drilling device is connected to an inner wall of the connecting barrel. Axes of the second drilling device, the connecting rod, the connecting barrel, the connecting pipe and the drill pipe are in the same straight line. The reinforced drill has multiple purposes, and sampling and drilling can be carried outwithout replacing the drill efficiently and conveniently; drilling resistance can be effectively reduced, slag can be exported, enough activity space is provided, deformation and damage of the drillare avoided, and cost is saved; the exact drilling position can also be positioned to avoid the error of the drilling position.

The invention relates to the technical field of rotary drilling construction, in particular to a bottom drilling structure, a rotary drilling bucket and a rotary drilling rig. The bottom drilling structure comprises a bottom plate, a spiral structure and a cutting structure, and a notch is formed in the bottom plate; and the spiral structure comprises spiral blades, one end of each spiral blade is connected to the bottom plate, and the other end of each spiral blade extends below the bottom plate. The cutting structure is connected to the other end of the spiral blade and matched with the notch to form a slag inlet. According to the bottom drilling structure, the cutting structure is connected to the lower portion of the bottom plate through the spiral blades, the cutting structure moves downwards, the slag inlet is enlarged, the slag inlet amount in unit time is increased accordingly, and the slag inlet efficiency is improved.

The invention discloses a double-layer cross-shaped self-drilling anchor bolt drill bit. The double-layer cross-shaped self-drilling anchor bolt drill bit comprises a main cutting edge, four auxiliary cutting edges, four upper symmetrical residue discharging grooves, four lower symmetrical residue discharging grooves, one upper water hole, two lateral water holes, a drill bit trouser, an internal thread and a transition hole. The main cutting edge is a cross-shaped edge where edge parts are connected, the four auxiliary cutting edges are evenly distributed around the trouser in a cross shape, and the edge parts of the auxiliary cutting edges face the top of the drill bit. The upper residue discharging grooves and the cross-shaped edge are distributed in a spaced mode, the lower residue discharging grooves are connected with the upper residue discharging grooves, and the upper and lower residue discharging grooves are of V-type structures. The upper water hole is a through hole, and the axis of the upper water hole coincides with the axis of the drill bit. The lateral water holes are through holes, one end of each lateral water hole is through the transition hole, and the other end of each lateral water hole is located at the junction point of the corresponding upper residue discharging groove and the corresponding lower residue discharging groove. The internal thread is located at the tail of the drill bit, and the transition hole is located in the bottom of the internal thread. The guiding capacity and the residue discharging capacity of the drill bit can be enhanced, then hole collapse in soft soil layer drilling is improved, and the drilling depth is increased.

The invention relates to a soil drilling robot, and aims to provide a submarine sediment stratum space drilling robot. The submarine sediment stratum space drilling robot comprises a lateral mud discharge drill bit mechanism composed of a drill bit and a transmission system, a front excavation supporting body section and a rear excavation supporting body section which are arranged along the axis, wherein the lateral mud discharge drill bit mechanism is located at the front end of the front excavation supporting body section, and a tail oil cable connector is arranged at the tail end of the rear excavation support body section. A front excavating propelling body section comprises an outer barrel, a hydraulic cylinder is arranged in the outer barrel, and the operation mode of telescopic claws can be changed through cooperation of the attraction effect of electromagnets and connecting flanges and a push rod of the hydraulic cylinder. The rear excavation supporting body section is provided with structural components which are the same as the front excavation propelling body section but arranged oppositely in the axis direction, and push rods and telescopic claws of the rear excavation supporting body section and the front excavation propelling body section have opposite action directions. According to the submarine sediment stratum space drilling robot, the body sections are independent in function, and the excavating propelling body sections can be increased according to specific working conditions so as to improve the movement capacity; and by means of the innovative excavating mode, soil around the robot can be squeezed backwards, pushed and excavated.

The invention discloses a drilling head device used for ultra-deep drilling of high tailing dam, which is characterized in that four pairs of V-shaped grooves are symmetrically opened on a bottom lip surface of a tyre foundation, the size of the V-shaped groove is supposed to match the diameter of the bottom part of cemented carbide, four round grooves are arranged on the central axis of the V-shaped grooves at the lateral side of the tyre foundation, the size of the round grooves is supposed to match the diameter of surface embedded alloy, a water gap is arranged at the lateral bottom surface of the tyre foundation, thread tapping is carried out on the upper part of the drilling head, the cemented carbide is arranged on the bottom lip surface of the tyre foundation, the surface embedded alloy is arranged at the lateral side of the tyre foundation; the cemented carbide is welded and embedded in the V-shaped grooves on the bottom lip surface of the drilling head, an inner exit lip is arranged on the cemented carbide while the surface embedded alloy is welded and embedded in the round grooves at the lateral side of the tyre foundation. The device features not only simple structure but also convenient use, in addition, adopted for deep well drilling of tailing dam, the device greatly reduces resistance in the process of drilling and avoids jamming during drilling ahead and hoisting, so that the drilling fluid can be recycled in a rapid and smooth manner, thus accelerating drilling ahead speed and preventing abrasion of the tyre foundation in the process of drilling ahead.

The invention provides a novel prefabricated threaded tubular pile and a construction method thereof, and relates to the technical field of buildings. The novel prefabricated threaded tubular pile comprises a tubular pile body and a threaded on the outer side of the prefabricated threaded tubular pile body. The width of the thread ranges from 2 cm to 30 cm, and the thickness of the thread ranges from 2 cm to 6 cm. The thread space ranges from 10 cm to 80 cm, and the spiral included between the thread and the horizontal plane ranges from 10 degrees to 40 degrees. During construction, the prefabricated threaded tubular pile is transported to the site section by section, piling is carried out after positioning, the pile sections are connected in a welding manner, and finally a welding connection opening is reserved at the pile head. Due to the fact that the side thread is designed, the rigidity of a foundation pile is improved, and the bending resisting and shear resisting capacity of the foundation pile is improved. During construction, a thread drilling construction manner is adopted, drilling resistance is reduced, the drilling speed is increased, and the construction efficiency is improved. Under the same geological conditions, the bearing force of the foundation pile is improved, the design pile length is reduced, and the project cost is reduced.