59results about How to "Effective drilling" patented technology

The invention discloses a loose-soft rock soil stratum reverse circulation casing-following drilling tool and a drilling process. The drilling tool is of a coaxial three-passage structure and comprises a double-wall drilling stem, an auger stem, a drilling bit, a casing and a casing shoe, a central hole of an inner tube of the double-wall drilling stem and a central hole of an inner tube of the auger stem form a slag discharging passage, an annular gap between the inner tube of the auger stem and an outer tube of the auger stem forms an air incoming passage, and an annular gap between the outer tube of the auger stem and the casing forms an outer ring passage; compressed air enters the drilling bit through the air incoming passage and then is diverted and used for assisting a cutting bladeto break a stratum and realize reverse circulation deslagging. Drillings suspended in the outer ring passage go up along spiral blades, enters a deslagging passage through a deslagging window and then returns to the ground surface. Reverse circulation deslagging through a fluid medium and deslagging assisted by the spiral blades are adopted in the process of drilling, so that casing-following drilling is realized to protect hole walls, the problems of bit burying and difficulty in deslagging and hole forming in the process of loose-soft rock soil drilling can be solved, and integration of drilling, collapse preventing, dedusting and wall protecting is realized.

The invention relates to a waterpower oscillator through which effective pressure can be exerted on a drill bit and well drilling efficiency can be improved in the technical field of oil exploitation. The waterpower oscillator comprises an upper connector, a stator, an outer shell and a lower connector all of which are sequentially connected in a sealed mode. A rotor is eccentrically arranged inside the stator, and the lower end of the rotor is sequentially connected with a cardan shaft upper connector, a cardan shaft and a cardan shaft transmission rod. The lower end of the cardan shaft transmission rod is connected with the outer shell in a sealed mode, the lower end of the outer shell is in threaded connection with the lower connector in a sealed mode, the lower end of the cardan shaft transmission rod is provided with a vibration valve in a matched and sleeved mode, and the vibration valve can do reciprocating sliding motion along the matched surface relative to the cardan shaft transmission rod. The lower end of the vibration valve is provided with a movable valve plate in a sealed and sleeved mode, wherein the movable valve plate and the vibration valve can do the synchronous movement, the upper end of the lower connector is correspondingly provided with a fixed valve plate attached to the movable valve plate, the movable valve plate and the fixed valve plate are respectively provided with a sector channel with the area larger than that of a half circle. An annular hollow part through which liquid can flow is formed among the rotor, the cardan shaft upper connector, the cardan shaft, the stator and the outer shell, the cardan shaft transmission rod is provided with a channel communicated with the annular hollow part, and the channel is communicated with a vibration valve cavity and the sector channels.

A spin-digging drilling rig is used for a sand stratum, a clay stratum, a broken pebble stone stratum, a hard rock stratum and a sludge stratum, and a special stratum spin-digging pile hole-forming construction method is characterized by including the steps of a, conducting positioning and paying off; b, burying a protective cylinder; c, preparing sludge; d, putting the spin-digging drilling rig in place; e, drilling holes; f, checking and accepting finished holes and conducting the conversional cast-in-place pile construction procedure of subsequently putting down a reinforcement cage for pouring concrete. The method has the advantages that construction steps are reasonable in design and easy to operate, the spin-digging drilling rig can effectively drill in the five special stratums including the sand stratum, the clay stratum, the broken pebble stone stratum, the hard rock stratum and the sludge stratum, construction efficiency is improved, the special stratums can be prevented from special processing, no special devices need to be arranged, project cost is saved, hole collapse and other quality problems are effectively avoided, and the quality of the finished holes is ensured.

The invention discloses an oil-natural gas drilling PDC drill bit, which comprises the following parts: drill body, main knife-wing, second knife-wing, big diameter PDC cutting part, small diameter PDC cutting part and nozzle, wherein the main knife-wing and second knife-wing appear in pairs and interseparate upwards on the drill; big diameter PDC cutting part is fixed on the main knife-wing and small diameter PDC cutting part is fixed on the second knife-wing; the thickness and back inclination angle of big diameter PDC cutting part are less than the small diameter PDC cutting part's; the outcropping height of big diameter PDC cutting part is higher than small diameter PDC cutting part's. The structure can drill in the alternative hard-and-soft formation effectively.

This excavation tool comprises: a casing pipe, a large-diameter ring bit disposed coaxially on a distal end side of the casing pipe, and a pilot bit inserted into the ring bit through the inside of the casing pipe. A bit head that expands in diameter when rotated in a tool rotation direction during excavation is provided to an outer circumferential part at the distal end of the pilot bit. Provided to the ring bit are: an engaging part that engages with the expanded bit head in the tool rotation direction and a first abutting part capable of abutting the bit head in the axial direction.

The invention provides a dual-drill-head locating and drilling mechanism. According to the technical scheme, the dual drill head locating and drilling mechanism comprises a base, a support frame, a drilling driving motor, an adjusting slide rail, two stamping devices, a lifting-driving device, a lifting platform, a drilling platform and a control platform, and each stamping device is provided withan auxiliary transmission shaft, a damping spring and a drill head; the drilling platform is provided with two adjusting plates and two adjusting screws, operating personnel only needs to adjust thescrews clamp all parts, and the practical requirements of drilling parts are met; the two stamping devices can move freely and horizontally, and the drilling distance of different parts is met; and the lifting-driving device is matched with the damping spring to achieve buffering during the drilling process. The dual drill head locating and drilling mechanism is simple in structure, the dual-drill-head drilling way capable of adjusting the distance can complete the drilling process for parts of different specifications and sizes, the process accuracy is high, the quality is better, drilling work of bulk parts can be completed, and the time cost is saved.

The invention provides a balanced retractable whole water pressure drilling and cutting device for soft and hard stratums and belongs to the technical fields of underground construction rock and earthmass drilling and cutting and underground construction disaster preventing and reducing. The balanced retractable whole water pressure drilling and cutting device includes a power system, a sensing system, a control system, a pressurization system, a balanced retractable system, a sludge discharging system, a supporting and protecting system, a pressure pipeline system and a drilling and cuttingsystem. The device can provide ultrastrong high water pressure to be used as a drilling and cutting power source, and the different soft and hard stratums can be accurately drilled and cut; the drilling and cutting force applied into the hard earth stratum area of a drilling and cutting head is controlled in a quantitative mode and is increased at real time, the drilling and cutting force in the soft earth stratum area can be kept constant, and the stability and accuracy of whole drilling and cutting construction are guaranteed; and the drilling and cutting force in the soft and hard stratumsof the different areas can be fed back quickly in a quantitative mode and information assurance is provided for ensuring that deviation of pile positions does not occur during the underground construction drilling and cutting construction.

The invention discloses a drilling process of a large-diameter geological drilled hole and relates to the technical field of drilling processes. A multi-segment connecting type combined drill rod is adopted as a drill rod. A torque transmission drill rod is mounted at the bottommost end of the combined drill rod. A small drill bit is mounted at the bottom of the torque transmission drill rod, wherein the small drill bit is used for drilling a core. A large drill bit is mounted on the lower portion of the torque transmission drill rod in a sleeving manner, wherein the large drill bit is used for drilling or coring. The large drill bit is connected with the torque transmission drill rod through a torque transmission mechanism. After primary residue collection or coring is completed through the large drill bit, the combined drill rod is reserved in the hole all the time, and the large drill bit is only lifted out of the hole. After residue is unloaded or a rock core is picked out, the large drill bit is dropped to the bottom of the hole along the combined drill rod once again. Synchronous rotation of the combined drill rod and the large drill bit is achieved through the torque transmission mechanism, and secondary drilling is conducted. By means of the drilling process, the drilling efficiency is greatly improved.

The invention discloses a diamond drill bit containing a grinding aid body structure. The diamond drill bit comprises a plurality of main working bodies arranged in the circumferential direction of the bottom lip surface of the drill bit and a plurality of grinding aid bodies arranged in the main working bodies, wherein the main working bodies are connected with the adjacent main working bodies through water gaps, the grinding aid bodies are uniformly distributed in the main working bodies at equal intervals, and the total area of the cross sections of the grinding aid bodies is 30%-38% of thetotal area of the main working bodies; each grinding aid body is a cylinder with the diameter of 3-5mm and the height of 12-15mm, the main working bodies play the role of crushing rocks mainly, and the grinding aid bodies play a role of crushing rocks in an auxiliary and indirect mode. The invention further discloses a 3D printing technical method of the diamond drill bit containing the grindingaid body structure. The diamond drill bit can effectively solve the problem of drilling in hard and dense rock layers.

The invention relates to a PDC drill bit with module cutting teeth. The PDC drill bit comprises a drill bit body (1) and a drill bit joint (2) arranged at one end of the drill bit body (1); multiple main blades (3) and multiple secondary blades (4) are arranged at the other end of the drill bit body (1) at intervals; multiple main cutting teeth are respectively arranged on the nose parts and the side surfaces of the main blades (3) and the secondary blades (4); the main cutting teeth comprise wear-resisting module cutting teeth (7) and impact-resisting module cutting teeth (8), wherein the wear-resisting module cutting teeth (7) and the impact-resisting module cutting teeth (8) are of cylindrical structures, the wear-resisting module cutting teeth (7) are composed of a base A (9) and a composite sheet A (10), and the impact-resisting module cutting teeth (8) are composed of a base B (11) and a composite sheet B (12). The PDC drill bit disclosed by the invention has the advantages that the high drilling speed can be maintained, and the long service life is guaranteed, the PDC drill bit is especially suitable for the drilling operation of the complex and abrasiveness stratum.

The invention relates to a method and a rock-drilling rig for drilling a hole in a rock. In the method the hole is drilled with a so-called top-hammer rock-drilling rig including a drill rod and a cone roller bit at the end of the drill rod. During drilling with the percussion device, stress pulses of low amplitude are produced at a high frequency of at least 200 Hz. In the rock drilling rig, the cone roller bit (3) at the end of the drill rod and the percussion device are configured to feed stress pulses of low amplitude, at the frequency of at least 200 Hz, via the drill rod and the cone roller bit to the rock.

The invention provides a drilling waste sulfonated mud treatment method, and belongs to the field of petroleum and natural gas. The method comprises the following steps: collecting drilling waste sulfonated mud, regulating the pH value of slurry by using a pH regulator; adding an oxidizing agent into the slurry after pH adjustment so as to oxidize the slurry; adding a heavy metal stabilizing agentinto the oxidized slurry to enable heavy metal ions in the slurry to form a stable complex; adding an inorganic flocculant or an organic flocculant into the slurry containing the stable complex, carrying out gel breaking and flocculating in the slurry, and carrying out solid-liquid separation. By adding a specific amount of the substances mentioned above, the drilling waste sulfonated mud is subjected to oxidation, complexing reaction, flocculation, solid-liquid separation and the like, so that harmful components of the sulfonated mud can be thoroughly removed, and the pollution of the sulfonated mud to the environment is eliminated.

The invention discloses an automatic clamping and punching machine for electronic devices with adjustable orientation, which comprises a base, and the top of the base is fixedly connected with a symmetrical first support rod and a second support rod, the first support rod and the second support rod A cross bar is arranged between them, the bottom of the cross bar is fixedly connected with a folded plate, the inner wall of the folded plate is fixedly connected with a first motor, the output end of the first motor is fixedly connected with a folded rod, and the end of the folded rod far away from the first motor is provided with a The first bearing, the outside of the first bearing is fixedly connected to the outer surface of the first support rod, the inner wall of the first bearing is fixedly connected to the outer surface of the folding rod, and the outer surface of the folding rod is provided with a second bearing, the second bearing The inner wall of the second bearing is fixedly connected with the outer surface of the folding rod, and the outer surface of the second bearing is fixedly connected with a movable rod. The present invention enables the whole to realize multi-directional drilling, and enables the whole to realize automatic clamping, reduces the participation of workers, and reduces the occurrence of accidental injuries.

The invention discloses drilling equipment for an automobile hub. The drilling equipment comprises a workbench, a conveying belt mechanism, a supporting plate, a lifting mechanism and a drilling mechanism. The conveying belt mechanism is arranged on the workbench, the upper surface of a conveying belt on the conveying belt mechanism is located above the workbench, the lower surface of the conveying belt is located in the workbench, the lifting mechanism is further arranged in the workbench, and the upper end of the lifting mechanism is connected with the center of the lower surface of the horizontally-arranged supporting plate, so that the supporting plate is driven to ascend and descend in the direction; and the lifting mechanism and the supporting plate are located between the upper surface and the lower surface of the conveying belt, an electromagnet layer is arranged on the upper surface of the supporting plate, and the drilling mechanism is arranged over the supporting plate and can drill the hub. By means of the drilling equipment, the problems that in the prior art, when hub drilling equipment works, a machined hub needs to be carried down manually and then replaced with a new hub for machining, the working efficiency is low, and manpower is wasted are solved.

The invention discloses a deep-water shallow natural gas hydrate solid-state fluidization mining drill bit mainly composed of four parts. The first part comprises a neck hole drill bit for neck hole drilling, and provided with a drilling fluid injection hole and a double spiral guide groove for cleaning a shaft bottom and assisting debris removal. The second part comprises a reaming drill bit forfurther enlarging a wellbore, and having a debris removal passage and a debris removal groove for facilitating debris removal. The third part comprises a refining device for refining a large-diameterhydrate silt cement body and a connecting tool. The fourth part comprises a tapered flow passage arranged inside a drill bit body to increase the jetting speed of the drilling fluid. The deep-water shallow natural gas hydrate solid-state fluidization mining drill bit specifically considers the structure and the physical property of a deep-water shallow gas natural gas hydrate layer, combines the demand of a fluidization mining process for the drill bit, not only realizes the refinement and the fluidization of hydrate silt cement large particle debris, but also solves the problems of debris deposition, poor fluidity and stuck drilling during long-distance horizontal drilling, thereby ensuring the efficient rock breaking and drilling efficiency in the horizontal section of the hydrate layer.

The invention discloses an automatic clamping and punching method for an electronic device with adjustable orientation. A second bearing (9) is sleeved on the outer surface of a folding rod (7), and the outer surface of the second bearing (9) is fixedly connected There is a movable rod (10), and the end of the movable rod (10) away from the first bearing (8) is fixedly connected with a pressing plate (11) and then fixedly connected with a symmetrical third electric telescopic rod (22) through the bottom of the operating plate (21). ), the bottoms of the two third electric telescopic rods (22) are fixedly connected to the top of the base (1). The distance between the operating plate (21) and the pressing plate (11) ensures that the electronic board can be placed stably during the drilling process.

The invention discloses a voucher stapling device comprising a base, a rack, a nut seat, a voucher pressing device, a screw, a collecting box, a motor, a transverse guiding rail, a limiting block, a limiting switch, a connecting block, an oil cylinder, a fixing block, a vertical guiding rail and a punching device. The voucher pressing device comprises a movable base, a movable side plate, a first fixing plate, a side screw, a fixing piece, a support, a pressing screw, a pressing plate, drilling jig holes, a baffle and a second fixing plate. According to the voucher stapling device, the structure is reasonable and simple, the production cost is low, mounting is convenient, the drilling efficiency is improved, and meanwhile the quality after drilling is ensured; and finally, after drilling, vouchers are stapled through a needle and a thread or glue.

The invention discloses a municipal sewer dredging device. The municipal sewer dredging device comprises a moving seat, a first motor, a water pump, a ball, a first metal hose, a water pumping pipe, afixing device and a second metal hose; and a main shaft is arranged on the middle part of the moving seat, a large rotating tube and a small rotating tube are arranged on the outer side of the main shaft separately in a bolted mode, the first motor bolt is mounted on the inner right side of the moving seat, the ball is disposed below the large rotating tube, a drill bit is arranged on the left side of a steel rope, and the fixing device is disposed on the middle part of the steel rope. The municipal sewer dredging device is provided with the drill bit, a second motor drives the conical drillbit and a drill pipe to rotate, obstruction can be effectively subjected to punching, meanwhile, an internal rolling bearing, a first baffle block, a second baffle block and a through hole effectivelyprevent the movement of an inner fixed shell, the normal operation of the drill bit is ensured, and the use of the first motor and the large rotating tube and the small rotating tube is matched to provide propulsion force for the drill bit.

An insert (10) for a sandwich component (30) having a honeycomb core (31) has an inner hollow-cylindrical sleeve (12) . To improve the force-transmitting ability between the insert (10) and the sandwich component (30) , the insert (10) further has an outer sleeve (16) which is connected to the inner sleeve (12) by means of a plurality of radial webs (18) forming a plurality of axial chambers (20). Introduction of a push-in part (32) into the chambers (20) , cause the anchor elements to exit, with their pointed end (24) in front, through exit openings (28) radially out of the chambers (20) .

The invention relates to a waterpower oscillator through which effective pressure can be exerted on a drill bit and well drilling efficiency can be improved in the technical field of oil exploitation. The waterpower oscillator comprises an upper connector, a stator, an outer shell and a lower connector all of which are sequentially connected in a sealed mode. A rotor is eccentrically arranged inside the stator, and the lower end of the rotor is sequentially connected with a cardan shaft upper connector, a cardan shaft and a cardan shaft transmission rod. The lower end of the cardan shaft transmission rod is connected with the outer shell in a sealed mode, the lower end of the outer shell is in threaded connection with the lower connector in a sealed mode, the lower end of the cardan shaft transmission rod is provided with a vibration valve in a matched and sleeved mode, and the vibration valve can do reciprocating sliding motion along the matched surface relative to the cardan shaft transmission rod. The lower end of the vibration valve is provided with a movable valve plate in a sealed and sleeved mode, wherein the movable valve plate and the vibration valve can do the synchronous movement, the upper end of the lower connector is correspondingly provided with a fixed valve plate attached to the movable valve plate, the movable valve plate and the fixed valve plate are respectively provided with a sector channel with the area larger than that of a half circle. An annular hollow part through which liquid can flow is formed among the rotor, the cardan shaft upper connector, the cardan shaft, the stator and the outer shell, the cardan shaft transmission rod is provided with a channel communicated with the annular hollow part, and the channel is communicated with a vibration valve cavity and the sector channels.

The invention discloses a method for actively killing injurious insects in a grain bulk by using a gas-solid two-phase flow. The method comprises the following steps: spraying out powder by using a power sprayer, wherein the powder is mixed with air above the grain bulk or air in a ventilating duct to form a gas-solid two-phase aerosol; forming an air flow in the grain bulk by using a ventilator; enabling the gas-solid two-phase aerosol to move along with the air flow to form the gas-solid two-phase flow; and enabling the gas-solid two-phase flow to enter into the grain bulk via gaps among grains in the grain bulk to be actively contacted with injurious insects among the grains for actively killing injurious insects. By selecting proper insecticidal powder and selecting the gas-solid two-phase flow to apply powder, the insecticidal powder is fully and uniformly contacted with the grains and the method is low in requirement on leakproofness of the grain bulk, temperature, pest species, humidity and the like, easy to operate and harmless to human body.

The invention discloses a metal plate drilling cutter, and aims to provide a metal plate drilling cutter capable achieving drilling conveniently. According to the technical scheme, the metal plate drilling cutter is characterized by comprising a base, a rotating device is arranged on the base, a telescopic rod is arranged on the rotating device, a drilling device is arranged at the top end of the telescopic rod, and the drilling device comprises a lifting device arranged on one side of the telescopic rod; and a conical drill bit is arranged at the top end of the telescopic rod, a transition rod is further arranged between the conical drill bit and the telescopic rod, a grinding drill bit is connected to the transition rod, and the grinding drill bit comprises a circular table base close to one end of the telescopic rod and an arc-shaped dull polish device located at the top end of the circular table base.

The invention discloses a rotary drilling rig elevator with a gas transmission channel therein, and belongs to the technical field of rotary drilling rigs. The rotary drilling rig elevator comprises an upper connecting body, a middle connecting body and a lower connecting body, wherein a board body is arranged on the upper connecting body; gas joints are connected on shoulder parts of one or two sides of a lug plate; a gas channel upper section which communicates with the gas joints is manufactured inside the upper connecting body; the lower end of the upper connecting body is fixedly connected to the middle connecting body through a threaded joint; a cylinder core of the lower connecting body extends in from the lower part of the middle connecting body and extends into the upper connecting body; an inner nut is arranged on the upper part of the cylinder core of the lower connecting body; a bearing assembly is arranged between the middle connecting body below the inner nut and the lower connecting body; a sealing joint part of the lower connecting body and the upper connecting body are in dynamic sealing; a gas channel lower section which is axially through is arranged on the middle inside the lower connecting body; and the gas channel lower section is in butt joint to the gas channel upper section to define the gas transmission channel. The rotary drilling rig elevator can realize load transfer under a relative rotation working condition, and also can realize high-pressure gas transmission.

The invention discloses a manual drilling machine having a drill pin protection function. The manual drilling machine comprises a base, a supporting rod, a machine head and a height adjustment mechanism; the height adjustment mechanism comprises a lower bottom plate; fixing pipes are arranged on the lower bottom plate; sliding grooves are formed in the side walls of the fixing pipes; a movable pillar is sleeved with one fixing pipes correspondingly; one end of each movable pillar is located in the corresponding fixing pipe; limiting strips are arranged on the side walls of the end parts of the movable pillars in a raised manner, and stretch out of the side walls of the fixing pipes through the sliding grooves and drive the movable pillars to slide along the sliding grooves; external threads are formed in the outer side walls of the fixing pipes in the axial directions; the outer side walls of the fixing pipes are connected and sleeved with adjustment rings through threads; the other ends of the movable pillars stretch out of the end parts, far from the lower bottom plate, of the fixing pipes, and are provided with an upper bottom plate; a drill pin is sleeved by a protection pipe; and the protection pipe comprises a first pipe section, a second pipe section and a third section pipe that are detachably connected in the axial direction sequentially. The effect of adjusting the distance between a to-be-drilled object and the drill pin can be realized; and the protection pipe is adopted for preventing the drill pin from deforming, so that effective drilling by a user is facilitated.

The invention discloses a carbide drill machining and manufacturing method, and belongs to the field of aviation and aerospace difficult-to-machine materials. The original drill tip form is changed, a composite form drill tip is innovatively researched and developed, and the cutting angle of a cutter is optimized through statistical analysis of cutting test data, so that a special novel drill cutter is formed to be mainly used for drilling machining of products made of high-temperature alloy, low-expansion alloy steel and ceramic composite base materials; and a design and manufacturing method for innovating the shape of the drill tip in a targeted mode and optimizing the angle of the cutter is used for meeting the requirement for drilling machining of products made of difficult-to-machine materials in scientific research and production. The cutting angles of the drill are reasonably compared through experiments, and the optimal machining angle is selected, so that wear resistance is achieved; on the other hand, a stepped cutting edge is added, so that the situation that the drill is damaged and scrapped due to the fact that the temperature of the drill is too high since the drill always uses a first cutting edge for machining is prevented; and optimization is reasonable, practicability and reliability are achieved, difficult-to-machine materials can be effectively drilled, and the blank in the field of the method in China is filled.

The invention discloses a positioning and early warning radar for geological drilling, and belongs to the field of geological drilling, the positioning and early warning radar for geological drilling comprises geological drilling equipment, the geological drilling equipment is provided with a water entry drill, and the upper end of the geological drilling equipment is fixedly provided with a radar probe located on the upper side of the water entry drill; a plurality of positioning ground arc sleeves are connected to the lower end of the water-entry drilling device in a sleeving mode, and the positioning ground arc sleeves can be carried by the water-entry drilling device and fall off to be adsorbed to the drilling position through cooperation of the positioning ground arc sleeves and the radar probe when the geological drilling device conducts water area geological memory drilling, so that the drilling position is positioned and identified, and the drilling efficiency is improved. Detection personnel are reminded under detection feedback of the radar probe, so that the occurrence of repeated detection or lost detection position conditions is effectively avoided, the water area detection efficiency is improved, the waste of drilling resources is reduced, and the economic benefits of water area detection are improved.

The invention discloses a high-precision indexing turntable and an operation method for equal indexing drilling of outer circles of pipe parts. It includes a first support plate and a second support plate fixedly installed on the top of the base, and the first support plate A main shaft is supported between the second support plate and a first threaded section and a second threaded section are processed on the main shaft, a first threaded sleeve is installed on the first threaded section through thread transmission, and the second threaded section is mounted on the first threaded section. A second threaded sleeve is installed on the threaded section through thread transmission, and a first connecting rod is hinged on the side wall of the first threaded sleeve, and the other end of the first connecting rod is hinged on the indexing turntable through the first pin shaft. On the side wall of the second threaded sleeve, a second connecting rod is hinged on the side wall, and the other end of the second connecting rod is hinged on the side wall of the indexing turntable through a second pin shaft.

Disclosed is a multi-bridging position and small-spacing edge-wrapped printed circuit board, which is mainly composed of a circuit plate (1). A side face of the circuit plate (1) is provided with a metal wrapping edge (3). The metal wrapping edge (3) is "]"-shaped, or the upper end face of the metal wrapping edge (3) is connected to a top face pattern (2) and the lower end face of the metal wrapping edge (3) is connected to a bottom face pattern (4). Further disclosed is a manufacturing method for the multi-bridging position and small-spacing edge-wrapped printed circuit board, comprising the following steps: a first step of wrapping edge design, in which a "]"-shaped metal wrapping edge (3) is designed at a side face of a circuit plate (1); a second step of mirroring half hole drilling design, in which drilling tool diameter selection is carried out firstly, drilling location selection is carried out secondly, and finally drilling compensation design is carried out; and a third step of mirroring half hole drilling manufacture, which comprises steps of drilling file manufacture, drilling positioning and board loading for half hole drilling. The present application is applicable to a multi-bridging position and small-spacing edge-wrapped printed circuit board, having advantages such that when hole drilling is carried out, copper sheets will not be raised; and when board milling is carried out, copper sheets at small bridging positions will not tilt and fall off.