531 results about "Core drill" patented technology

The invention relates to a hole bottom freezing cord coring drill and a coring method thereof. In the invention, liquid nitrogen is taken as a refrigerant; the liquid nitrogen absorbs heat in the gasification process so as to freeze a core at a hole bottom and inhibit a natural gas hydrate from being decomposed. The drill comprises an outer tube assembly and an inner tube assembly; and in the process of acquiring the core, a sand hitch is utilized to drag the inner tube assembly out from the outer tube assembly, an end cover and a clamp spring are dismounted, a semi-closed tube and a core sample are pumped out together from a core tube, the two ends of the semi-closed tube are sealed by rubber plugs, and the core sample and the semi-closed tube are stored in a liquid nitrogen hold-up vessel or a high-pressure container together. The invention has the advantages that rapid freezing can be realized, and the freezing effect is good; since cord coring and hole bottom freezing are combined, rapid coring without lifting the drill is achieved; in the drilling process, the inner tube assembly does not rotate, thus damages on a hydras core caused by mechanical force generated by rotation of the drill is avoided to a greater degree, the percentage of coring, the core integrity degree and the representativeness are more effectively improved; and semi-closed tube type rapid ground surfacesampling is adopted, thus the core can be rapidly obtained from the ground surface.

The invention discloses a karst grouting reinforcement water-stop constructing method, which is to construct according to sizes of karst caves by adopting a principle of from big to small regarding a certain area, construct by adopting a principle of from outside to inside for the karst caves with the same size, and construct by adopting a principle of from the bottom to the top in a vertical direction. On the basis of the construction principles, the method comprises the following steps of: (1) forming grouting holes by adopting a core drill; (2) forming construction exhaust and drainage pressure relief holes; (3) inserting grouting pipes into the grouting holes, wherein the grouting pipes comprise steel pipes, grouting shock pipes and sleeve valve pipes; (4) cleaning the holes, wherein when the step (3) is completed, the grouting pipes are cleaned with clean water; (5) grouting; and (6) drawing out the grouting pipes after the grouting is completed, and blocking the grouting holes with cement mortar or concrete. By adopting the constructing method, the pertinence to karst caves is strong, the grouting quantity is small, the engineering work amount is small, the cost is low, and the effect of filling and reinforcing is good.

A process for controlling and a core drilling machine (1) having an electrical motor (2) for rotational drive of a core drill bit (3) having cutting edges (5) oriented axial to a work piece (4), a feeding means (6) for generating the feed of the core drill bit (3) against the work piece (4) and having a controller (7) for controlling, relative to a first one-to-one control parameter, detected by a sensor (8, 8′) for electrical power consumption (P) or torque (M). A force sensor (9, 9′) is connected to the controller (7) for detecting the contact pressing force (F_N) of the core drill bit (3) as the second control parameter.

A core-drilling device (10) comprising a drilling machine (3) with a core drill (4), a drill stand (2), a feeding housing suspending the drilling machine and which is movable along the stand, an electric drilling motor for rotation of the core drill in the drilling machine and a feeding unit (19) with an electric feeding motor (17) for the feeding of the feeding housing along the stand. A control unit (30), which is electrically connected to the feeding unit, comprises at least a first control (33) for manual influence of the feeding motor's (17) feeding force.

A cutting tip 14 is secured to the distal end of the shank 12 of a non-core type bit 16 that is designed to bore holes. The shank 12 has a water-supplying passage 22 and a water-discharging passage 26. The water-supplying passage 22 is configured to supply cooling water to the tip 14. The water-discharging passage 26 is configured to discharge the cooling water from a hole 24 being bored by the tip 14. A swivel 32 has a water-supplying port 28 that is connected to a cooling-water source 54. The cooling water flows from the cooling-water source 54 to the bit 14 through the water-supplying passage 22. A suction force applied by a cooling-water discharging means 56 compels the cooling water out of the hole 24. The cooling water is thereby discharged through the water-discharging passage 26.

A plurality of chip evacuating grooves (16, 26, 36, 46a, 46b) in a vertical direction in parallel with a rotational axis of a core main body (14) are formed at an outer peripheral face of the core main body (14) in a circumferential direction from a lower end portion to an upper end portion of the core main body (14) in a cylindrical shape provided with a drilling blade (15) at a lower end edge thereof. Further, a sectional area of the chip evacuating groove (16) is formed to gradually increase from a lower end to an upper end of the core main body (14). Further, a number of projections (52, 62, 70, 72) are formed at the outer peripheral face of the core main body (14) between the chip evacuating grooves.

A hole coring system is provided that greatly stabilizes a tubular core drill bit for drilling into concrete or other materials enabling large diameter holes to be drilled with a handheld tool. The drill bit is guided by a mandrel which is attached to the concrete. The mandrel serves as a central guidepost that ensures that a relatively large diameter, tubular core drill bit remains precisely centered relative to the guide mandrel. This enables the operator to use a commonly available tool to rotate the drill and apply drill pressure only. The motor may rotate the drill bit via a gear box. The gear box may have a lever arm which may be used to resist any torquing action of the gear box due to the friction between the drill bit and the concrete. Additionally, in the event the motor's housing is not fixed to the gearbox and allowed to rotate, a brace may be attached to the lever arm which may be used to resist any torquing action of the motor's housing due to the friction between the drill bit and the concrete.

PCT No. PCT/AU96/00587 Sec. 371 Date Sep. 1, 1998 Sec. 102(e) Date Sep. 1, 1998 PCT Filed Sep. 19, 1996 PCT Pub. No. WO97/11346 PCT Pub. Date Mar. 27, 1997A wood coring drill bit comprising a hollow tube having an internal bore (103) and an exterior (100) with equally spaced bodies (10) of substantially uniform width extending in a helical manner from a cutting end (10) of said drill bit, said bodies (10) defining equally spaced flutes (15) between the edges of adjacent bodies (10), each body (10) comprising a land (20) upstanding from a relief (21) at the leading edge of the body (10), a respective cutting face (12) and associated lip (25) being formed at the end of each body (10) at said cutting end. The wood coring drill bit is characterized by having three equally spaced bodies (10) and flutes (15) said cutting face (12) has an included angle which is preferably 125 DEG for hardwood and drywood and 112 DEG for softwood. The lip (25) has a lip clearance angle that is about 6 DEG +/-1 DEG , the lands (20) on the bodies (10) extend for an axial distance of about 65 mm+/-5 mm from said cutting end (101) and the internal bore (103) of the hollow tube is tapered outwardly from or adjacent the cutting end (101).

The invention discloses a hydraulic control natural gas hydrate hole bottom frozen rope core drill and a coring method, which are particularly suitable for drilling and coring of natural gas hydrates of deep sea and permafrost lands. The hydraulic control natural gas hydrate hole bottom frozen rope core drill uses dry ice as a cold source, uses ethyl alcohol as cooling catalyst and secondary refrigerant, and can achieve rapid freezing of natural gas hydrate rock cores. The hydraulic control natural gas hydrate hole bottom frozen rope core drill achieves to rapidly core without lifting a drill by combining rope coring and hole bottom freezing. The hydraulic control natural gas hydrate hole bottom frozen rope core drill drives a control valve machine to achieve the process that the cold source is injected into a refrigeration mechanism by adopting drilling fluid column pressure, and has high feasibility. An inner pipe assembly does not rotate when drilling, prevents hydrate rock cores from being damaged because of mechanical force which is produced by a drill in a large extent, thereby more effectively improving recovery rate of rock cores, integrity and representative, and can rapidly obtain the rock cores on the ground by adopting a split core barrel mode to rapidly sample on the ground.

The invention relates to a double-wall spindle power head for a core drill. The power head comprises an outer box body, a power mechanism, a transmission system, a spindle and a sealing unit, wherein the outer box body consists of a box body assembly and an upper box cover which are positioned by a positioning pin and connected by a screw; the power mechanism is a hydraulic motor or a motor; the transmission system consists of a driving gear shaft and a driven gear; the double-wall spindle consists of a spindle outer tube and a spindle inner tube; the spindle outer tube is connected with the driven gear through a spline; the driving gear shaft and the spindle outer tube, and the box body assembly and the upper box cover are connected through a rolling bearing respectively; a shaft hole and a key groove are reserved on the driving gear shaft and used for connecting the power mechanism; the spindle outer tube is provided with a through hole for washing solution to pass through; a sampler can be stored in a cavity of the spindle inner tube; and the sealing unit comprises a dynamic seal and a static seal. The power head has a compact structure and high sealing property, provides rotary motion, rotary torque and washing solution for the drilling of the drill, and is suitable for underwater and land core drilling; and an orifice is not required to be avoided and a water tap is not required to be disassembled when a core is taken.

The invention relates to a comprehensive strength testing method of the neural network technique, which combines the advantages of three strength testing methods: supersonic, rebounding and core drilling, thus solving various disadvantages of the existing single strength testing technique. The basic principle of the comprehensive strength testing method includes that: firstly, the strength of structural concrete is tested in full dimensions with the supersonic-rebounding comprehensive method, and then the R-N-C benchmark curve is properly corrected by the core drilling method, wherein, the determination of the optimum drilling core number is solved by the neural network technique. Concrete materials are degraded to different extends as large quantity of engineering structures are being influenced by such factors as environmental corrosion and temperature change, and the method of the invention can, on the basis of ensuring accurate and reliable test results, greatly reduce the structural damages caused by the core drilling strength testing method, improve the analysis efficiency and operability of the supersonic-rebounding-core drilling comprehensive strength testing method, so the method of the invention has wide application prospects in the strength testing of various concrete works .

The invention relates to an energy-saving device, in particular to a plastic pipe punching energy-saving device. The plastic pipe punching energy-saving device can reuse waste plastic blocks, saves resources and is easy to operate. The plastic pipe punching energy-saving device comprises a bottom plate, a left supporting rod, an electric wheel, a sliding rail, a driven wheel, a right supporting rod, a pull wire, a slider, a collection box, an electric heating wire, a connection rod I, a thumb cylinder I, a connection rod II, a thumb cylinder II, a top plate I, a left bearing block, a right bearing block, a motor I, a lead screw, a nut, an electric push rod, a top plate II, springs, a motor II, a cam, a push plate, a motor III and a hollow drill bit. The left supporting rod, the electric wheel, the sliding rail, the driven wheel and the right supporting rod are sequentially arranged on the top of the bottom plate from left to right. The device has the effects that waste plastic blocks can be reused, resources are saved and operation is easy.

A remote operation wire line core sampling device capable of increasing the efficiency of working and maintaining the wall of a hole by using a stabilized sea-bottom core drill at a sea-bottom and adopting a wire line system, comprising a drill rod held by the chuck of the sea-bottom core drill, a wire line core barrel having, at the tip thereof, a bit for annularly drilling a ground, an inner tube assembly detachably incorporated in the wire line core barrel, and an over-shot assembly (5) having a function for the engagement thereof with a spear head part at the top end of the inner tube assembly. The device also comprises a water swivel (18) in which water supply ports (3) and (4) are formed at the upper and lower parts thereof and a modified built-in type over-shot assembly (4) are formed at the upper and lower parts thereof and a modified built-in type over-shot assembly (5) is incorporated therein so as to reside at the intermediate part thereof.

The invention discloses a hot water core drill used at a glacier. The hot water core drill comprises a plunger pump, a two-way pipe, a heat insulation pipe, an ice core pipe, a drill bit and a flower divider, wherein the plunger pump is arranged in a pump storage pipe, the upper end of the plunger pump is connected with a water outlet pipe, the lower end of the plunger pump is connected with a water absorption pipe, the two-way pipe is connected to the lower end of the pump storage pipe, the lower end of the two-way pipe is connected with the heat insulation pipe, the ice core pipe is inserted in the heat insulation pipe, the drill bit is arranged below the heat insulation pipe and the ice core pipe, the flow divider is arranged on the lower portion of the two-way pipe and at the top end of the ice core pipe, the top end of the flow divider is connected with a hot water injection pipe, the lower portion of the flow divider is connected with a plurality of drainage pipes which are arranged in a gap between the heat insulation pipe and the ice core pipe, and hot water injected by the hot water injection pipe at the top end of the flow divider is injected into the drainage pipes through the flow divider. The hot water core drill has the advantages that due to the fact that the hot-melting drill bit is adopted for tapping and drilling of the hot water drill, and molten water is extracted to serve as a raw material of the hot water drill, cost is reduced, and the energy utilization rate is increased.

Core drill bits with long crown heights are described herein. The core drill bits have a series of slots or openings that are not located at the tip of the crown and are therefore enclosed in the body of the crown. The slots may be staggered and/or stepped throughout the crown. As the cutting portion of the drill bit erodes through normal use, the fluid/debris notches at the tip of the bit are eliminated. As the erosion progresses, the slots become exposed and then they function as fluid/debris ways. This configuration allows the crown height to be extended and lengthened without substantially reducing the structural integrity of the drill bit.

A diamond core drill bit (100) is disclosed. The drill bit has a right-circular cylindrical body (120) with at least one side lubrication hole (122) toward the bottom of the body and a plurality of parallel grooves (124) oriented in an axial direction at the bottom circumferential sidewall of the body. A cap (130) at the top of the cylindrical body (120) closes one end of the body. The cap has a central lubrication hole (134) and alternative embodiments have at least one core extraction hole (132). These holes extend through the cap to the interior of the body. A hollow drive shaft (140) is mated to the cap (130) over the central lubrication hole (134), such that a lubricant can flow through the hollow shaft and into the internal volume of the body and out a side lubrication hole (122). Diamond grit (160) is bonded around the bottom edge on a portion of the internal and external sidewall surfaces at the bottom circumferential edge of the body (120) in such a way that the diamond grit (160) is bonded over a portion of the axial height of the grooves (124).

The invention relates to a drill bit with a removable inner core for drilling. In the prior art, the drill bit has an integral type structure, and cannot directly convey articles to a drilling hole of a collapsed stratum through a through hole in a drilling rod; if the integral type drill bit is completely abandoned at the hole bottom, and the articles are conveyed to the drilling hole through the through hole in the drilling rod, the cost is too high, and subsequent construction can be affected; and after the drill bit and the drilling rod are taken out, the drilling hole is easy to collapse, the success ratio is low, and the operation is troublesome. The drill bit with the removable inner core for drilling consists of an outer drill bit, an inner core drill bit, a steel ball and a spring, and after being stressed by certain pushing force, the inner core drill bit can be separated from the outer drill bit. Therefore, the drill bit with the removable inner core for drilling has the characteristics of simple structure, less abandoned parts, low cost, high reliability, convenient operation, and the like.

The invention discloses a core pressure-maintaining coring drill tool for a submarine natural gas hydrate and belongs to the technical field of well drilling equipment. The core pressure-maintaining coring drill tool is matched with a rope fishing coring-drilling technique and comprises an inner pipe assembly and an outer pipe assembly. The outer pipe assembly is of the structure of a vertically-through cavity, the upper end of the outer pipe assembly is connected with a drill rod, and a drill bit is arranged at the lower end of the outer pipe assembly. The inner pipe assembly is placed in the cavity of the outer pipe assembly. A core pipe is arranged at the lower end of the inner pipe assembly, and a clamp spring and a clamp spring seat are arranged at the lower end of the core pipe. The core pressure-maintaining coring drill tool is characterized by further comprising a pressure compensation system; the pressure compensation system is provided with a pressure-maintaining cap assembly; the pressure-maintaining cap assembly is matched with the clamp spring seat in the inner pipe assembly; and when a core of the natural gas hydrate is transferred onto the submarine drilling machine from the bottom of a hole, the pressure-maintaining cap assembly is in inserted connection with the clamp spring seat so as to seal the lower end of the core pipe. The occurrence condition of submarine minerals can be restored to the largest extent through a core sample obtained by the core pressure-maintaining coring drill tool, and the basis is provided for improving the mining technology of the natural gas hydrate.

A hole coring system is provided that greatly stabilizes a tubular core drill bit for drilling into concrete or other materials enabling large diameter holes to be drilled with a handheld tool. The hole coring assembly includes a hollow drive shaft assembly that fits over a stationary mandrel that is initially installed and anchored in a pilot hole in the concrete or other material. Once the mandrel has been firmly installed as a guidepost extending rigidly out from the concrete surface, the hollow drive shaft assembly is lowered onto the mandrel. The drive shaft assembly is stabilized relative to the mandrel by means of elongated, cylindrical bearing sleeves, which may be formed of self-lubricated or fluid lubricated bearing materials. The mandrel serves as a central guidepost that ensures that a relatively large diameter, tubular core drill bit remains precisely centered relative to the guide mandrel. This enables the operator to use a commonly available tool to rotate the drill and apply drill pressure only. Preferably a releaseable latch and catch mechanism is provided to releaseably couple the drive shaft assembly to said mandrel.

A core drill assembly with replaceable fluid nozzles permitting effective total flow area adjustment (TFA), substantial optimization of hydraulic force at the cutting face to improve rate of penetration (ROP) and core quality. At least one seal assembly to restrict drilling fluid flow while permitting mutual rotation between the core head ID and the lower shoe is disposed in an annulus defined therebetween.