65results about How to "Improve rock breaking effect" patented technology

The invention belongs to the technical field of coal stope and roadway surrounding rock control, and particularly discloses a carving device and method for a front mixing type abrasive water jet directional cutting top plate. The carving device comprises a water supply box and an anchor agitator mounted in the water supply box. A water pump is arranged at the top of the water supply box, abrasivewater in the water supply box is pumped into a slush pump through the water pump, and a pressure gauge is arranged on a water outlet pipeline of the slush pump. An outlet of the water outlet pipelinecommunicates with a directional drilling rod, and a drilling rod transmission device is arranged at the inlet end of the directional drilling rod. A drilling rod direction control device is arranged at the outlet end of the directional drilling rod, and a slotting drill bit is arranged at an outlet of the directional drilling rod. The carving device has the advantages of being convenient to use and safe in use.

The invention belongs to the technical field of supercritical carbon dioxide jet, and discloses a formation method and device of self-excited oscillation supercritical carbon dioxide jet. The device includes a carbon dioxide gas supply system, a cooling liquefaction system, a pressurization system, a temperature rise system, an experimental system, a filtering system, a recovery system and a control system, and particularly includes a high-pressure carbon dioxide cylinder, a cold bath box and an air-cooled compressor, a liquid carbon dioxide storage tank, a high-pressure plunger pump, a hot bath box, a heating buffer tank, a circulating pump, an experimental kettle, at least two desambers, purifiers and control cabinets. According to the device, supercritical carbon dioxide is prepared byusing the systems, an improved self-excited oscillation nozzle is used for producing the self-excited oscillation supercritical carbon dioxide jet, impact force of the self-excited oscillation jet is1.5-2.5 times of stagnation pressure of continuous jet, the impact damage effect of the jet can be enhanced, and the self-excited oscillation supercritical carbon dioxide jet can obtain the better rock breaking and erosion effect and has broad prospects in unconventional oil and gas development.

The invention relates to the technical field of down-hole operating equipment, in particular to a rotary impacting device. The rotary impacting device comprises an outer tube, an upper mandrel, a lower mandrel, a mandrel anvil, an impacting generating piece, an impacting driving assembly and an impacting executing assembly; the upper mandrel capable of rotating relative to the outer tube is hung on the inner side of the upper part of the outer tube, and the lower mandrel capable of rotating relative to the outer tube is mounted on the inner side of the lower part of the outer tube in a limitedmode; the mandrel anvil is mounted in a mounting annular groove, the mounting annular groove sleeves the lower part of the upper mandrel, and the lower part of the upper mandrel is located above themandrel anvil; and the lower part of the upper mandrel and the upper part of the lower mandrel are connected together in a transmission mode. Through arrangement of the impacting driving assembly andthe impacting executing assembly, the upper mandrel can periodically move up and down in a reciprocating mode relative to the lower mandrel, thus downward collision acting force can be periodically generated for the mandrel anvil through the impacting generating piece, a downstream drill bit is downwards impacted in a pulsed mode in the drilling process, and the rotary impacting device has a goodrock breaking effect in drilling operation.

The invention discloses a method for improving a percussion drilling capability of a screw drill and a pulse screw. The pulse screw includes an anti-drop conversion assembly, a motor assembly, a pulsecardan shaft assembly and a transmission shaft assembly; the anti-drop conversion assembly comprises an anti-drop conversion connector head, an anti-drop disc and an anti-drop connecting rod, the anti-drop disc is arranged in the anti-drop conversion connector head, the upper end of the anti-drop connecting rod is sleeved with the anti-drop disc and fixed through tightening nuts, and the other end of the anti-drop connecting rod is connected with the upper end of a rotator of the motor assembly. The method is simple in structure, safe and reliable. Not only can output torque and rotation speed be increased through the motor assembly, but also the percussion drilling capability of the screw drill can be improved through the pulse cardan shaft assembly, and the drilling efficiency is effectively improved.

The invention discloses a drivage peripheral hole homoenergetic blasting method. Peripheral holes (6) are dug on a roadway contour line of a surrounding rock (1) at the end part of a roadway; explosives (4) and cushioning materials (3) are alternatively arranged in each peripheral hole (6) from inside to outside; the explosives (4) in the adjacent peripheral holes (6) are distributed in a shape of a Chinese character pin; detonators (5) are arranged in sections along the explosives (4); nonel tubes (9) of the detonators (5) are led out of the holes along the hole walls of the peripheral holes (6); hole orifices of the peripheral holes (6) are plugged by stemming (2); then detonation is carried out according to a designed detonation network connecting line. According to the method disclosed by the invention, the explosives (4) and the cushioning materials (3) are distributed symmetrically, so that energy is more uniformly distributed, an energy utilization rate of the explosives is improved, a contour of a roadway section is well controlled, the back break phenomenon is avoided, and roadway supporting cost is reduced; meanwhile, the uniformly distributed explosive energy can enable a fragment size for blasting to be uniform, obviously improve a blasting effect and improve shovel-loading efficiency after blasting.

The invention discloses a drilling insert, a roller cone bit and a drilling insert machining method. The drilling insert comprises an insert tooth portion. The insert tooth portion comprises a drilling surface arranged at the top portion and chip removal inclined surfaces arranged on the side. The drilling surface is of a plane structure. Recessed tooth grooves are formed between the two adjacentchip removal inclined surfaces in the insert tooth portion. The top ends of the tooth grooves are connected with the drilling surface. According to the drilling insert, the roller cone bit and the drilling insert machining method, the tooth grooves are formed between the two adjacent chip removal inclined surfaces, the top ends of the tooth grooves are jointed with the drilling surface, that is, the drilling surface is provided with a notch structure, and the drilling surface is of a multi-tooth structure. The drilling surface and the tooth grooves meet the stress concentration at the joint corner positions, and the rock breaking force is large. The insert has better rock breaking effect under the larger driving force, so that the working efficiency in the hard formation is improved.

The invention relates to the technical field of building construction, in particular to a grooving construction method. The grooving construction method comprises the following steps: determining a grooving position; constructing a guide wall to form a guide wall groove; placing a rectangular drill bit at the bottom of the guide wall groove; crushing a rock stratum by utilizing plasmas generated by the rectangular drill bit to form a groove section; cleaning the bottom and the side wall of the groove section; and hoisting a reinforcement cage, and pouring concrete. According to the grooving construction method, the plasmas are generated through the rectangular drill bit, a plasma channel is formed, the pressure in the plasma channel is rapidly increased under the action of high temperature along with the high temperature and high pressure while the plasma channel is formed, so that the plasma channel is expanded and breaks down rocks, and the surrounding rocks are crushed; and the plasmas are adopted to crush various rock stratums, so that the rock crushing effect is good, construction equipment does not need to be replaced, the construction efficiency is high, and the construction cost is reduced.

Disclosed is a combination scraping and impacting drill bit, belonging to the field of rock-breaking tools for drilling equipment for petroleum and natural gas, mine engineering, fundamental architectural engineering construction, geology, hydrology, etc. The drill bit comprises a drill bit body (1) and a fixed cutting structure (2) consolidated onto the drill bit body (1); further the drill bit body (1) is provided with an impact cutting structure (3); the impact cutting structure (3) comprises a transmission mechanism (32) for transmitting the impact force, and impact cutting teeth (31); the impact cutting tooth (31) is consolidated onto a punch (321) at the end of the transmission mechanism (32); and the punch (321) can slide or slidingly impact relative to the drill bit body (1) in the direction of impact force transmission. By comparison with a traditional PDC drill bit, the present drill bit is not only favourable for the cutting tooth of the drill bit entering into earth strata such that the rock-breaking efficiency is improved, but also favourable for the wear rate of the cutting tooth to be reduced, and particularly the present drill bit has an obvious technical advantage in the conditions of hard earth strata with relatively high strength and comparatively strong grindability.

The invention relates to a rock breaking device carried to an excavator, and the problems that an existing device scarifier is poor in rock entering angle, energy consumption is high, and the rock breaking effect is poor are solved. One end of a bucket rod cylinder is hinged to the upper edge of the middle portion of a big arm, and the other end of the bucket rod cylinder is hinged to the upper end of a small arm. The upper end of the small arm and one end of a scarifier oil cylinder are hinged, the other end of the scarifier oil cylinder is hinged to the upper end of the scarifier, the lowerend of the scarifier is connected with bucket teeth, and the ratio of the distance between a fourth hinge shaft and a first hinge shaft to the distance between the first hinge shaft and a seventh hinge shaft is larger than 0.8, the length of an upper part of the scarifier is larger than the distance between a fourth hinge shaft and the first hinge shaft, and when the fourth hinge shaft has multiple installing positions, the shortest distance serves as the criterion for the distances between the fourth hinge shaft and the first hinge shaft, and the length of the upper part of the scarifier is larger than the distance between the first hinge shaft and the seventh hinge shaft, and when the first hinge shaft has multiple installing positions, the shortest distance serves as the criterion for the distances between the first hinge shaft and the seventh hinge shaft, the total length of the scarifier is larger than the distance between the fourth hinge shaft and the seventh hinge shaft, and when the fourth hinge shaft has multiple installing positions, the shortest distance serves as the criterion for the distances between the fourth hinge shaft and the seventh hinge shaft.

The invention discloses a combined type diamond drill bit under complex and difficult drilling conditions. The drill bit comprises a drill bit body, a cutter wing, a nozzle or a jet nozzle, wherein the cutter wing extends from the drill bit body or is fixed to the drill bit body, a fixed cutting element is arranged on the fixed knife wing, meanwhile, one or more roller cones composed of roller cone bodies and teeth and one or more disc cutters composed of disc cutter bodies and disc cutter cutting elements are arranged on the drill bit, and the roller cones and the disc cutters are separatelyrotatably connected with the drill bit body through a roller cone support and a disc cutter support. The advantages of a roller cone-PDC combined drill bit and an intersecting cutter PDC drill bit arecombined, in this way, the working performance of the drill bit under the complex and difficult drilling conditions is improved, and the application range of the drill bit on the stratum is further enlarged.

The invention relates to a carbon dioxide rock breaking device and method for an open pit mine. The device comprises a gas injection pipe, a booster pump, a stirring type carbon dioxide and abrasive mixing mechanism, a liquid carbon dioxide storage tank, an energy storage chamber and a fracturing chamber, a packing sheet is arranged between the energy storage chamber and the fracturing chamber, and the gas injection pipe is provided with a pressure sensor, a flow sensor and a plurality of valves; and a ceramic electric heating sleeve and a thermal insulation sleeve are sequentially arranged on the portion, between the energy storage chamber and an opening of a drilled hole, of the gas injection pipe in a sleeving manner. The method comprises the following steps of distributing holes; determining rock breaking parameters; conducting hole drilling; performing thermal reaming on the drilled hole; sending an energy storage chamber and fracturing chamber series-connection body into the drilled hole; sealing the opening of the drilled hole; introducing carbon dioxide abrasive mixed fluid into an inner cavity of the energy storage chamber, and injecting liquid carbon dioxide while blocking cracks in the wall of the drilled hole; pressurizing and heating the liquid carbon dioxide to form supercritical carbon dioxide and seal the energy storage chamber; and continuously introducing supercritical carbon dioxide to break the packing sheet, enabling the liquid carbon dioxide in the drilled hole to be rapidly gasified and expanded, and enabling the energy of the liquid carbon dioxide to directly crack a rock stratum.