162results about How to "Improve drilling efficiency" patented technology

The invention discloses a drilling pump pressure prediction method based on an artificial neural network, and the method comprises the following steps: S1, data collection; s2, data preprocessing; s3, constructing a neural network model; s4, model training and optimization; and S5, model verification and deployment. According to the method, multi-channel data fusion and time synchronization optimization are innovatively adopted, so that the data quality and consistency are improved; in combination with a deep neural network and a self-adaptive optimization strategy, the precision and generalization ability of pump pressure prediction of the drilling pump are improved; and an online updating mechanism is introduced, so that the model can be dynamically optimized according to real-time data, the defects of low prediction precision, poor adaptability and difficulty in real-time updating of a traditional method are overcome, and an efficient and reliable prediction means is provided for intelligent drilling control.

The application discloses a rock drillability prediction method based on multi-source information fusion, first, the drilling data and vibration data are fused to predict the rock drillability, aiming at the problem that the time scales of the drilling data and the vibration data are inconsistent, a segmented cubic Hermite interpolation method is adopted to unify the time scale, then, a mutual information method is adopted to analyze the data correlation, and suitable input variables are obtained, finally, an extreme learning machine method is adopted to establish a rock drillability prediction model to obtain the uniaxial compressive strength value. The drilling data and the vibration data are used to predict the rock drillability, the drilling efficiency is improved, the stability of the drilling process is ensured, the safety accidents are effectively reduced, and the method provides guidance for the research on intelligent control of the drilling process, and has practicability and applicability.

This invention discloses an intelligent directional closed-loop control method and system for a curved-shell screw drill string assembly. The method includes intelligent switching control of sliding / compound drilling modes and intelligent tool face control. The intelligent switching control of sliding / compound drilling modes uses a single drill string or column as the controlled object, intelligently designing the sliding / compound drilling length of the single drill string or column to be drilled and the switching scheme between the two, which is executed by an automated actuator to achieve intelligent switching between sliding / compound drilling. The intelligent tool face control includes changing the drill pressure control tool face and the wellhead rotary drill string control tool face. Before tool face control, the tool face control parameters are intelligently designed and executed by an automated actuator to achieve intelligent closed-loop control of the tool face. This invention can avoid the large amount of non-drilling time consumed by repeated adjustments, improving drilling efficiency.

The application discloses a kind of pneumatic directional drilling system and drilling method suitable for local water-containing soft coal seam, including directional drill bit, screw drill, conversion nipple, non-magnetic drill tool, multiple special directional drill pipes and air feeder connected in order from back to front;The screw drill includes output shaft end head connected with the directional drill bit and stator end head sleeved on one side of output shaft end head, and output shaft end head can rotate relative to the stator end head, by setting screw drill and conversion nipple, both directional drilling in water-containing soft coal seam can be guaranteed, and strong blowing process can be implemented to discharge drill cuttings and formation water in hole to outside of hole in time, keep drilling operation continuous and smooth, greatly reduce the amount of operation of pulling down drill during construction, and the comprehensive drilling efficiency can be improved by more than 20%, solve the technical problems of poor formation adaptability of prior art, and cannot realize strong blowing and cuttings discharge and rapid switching of directional drilling during directional hole construction process in local water-containing soft coal seam, resulting in low drilling efficiency.

The application discloses a dynamic shale gas horizontal well stratum dip angle prediction method, which comprises the following steps: establishing a shale reservoir velocity model; preparing a shale reservoir structure map, and designing depths of target points A and B of a shale gas horizontal well, wherein the target point A is a starting position of a horizontal section of the shale gas horizontal well, and the target point B is an ending position of the horizontal section of the shale gas horizontal well; calculating a stratum dip angle alpha of the whole horizontal section according to a horizontal distance and a longitudinal distance between the target points A and B; after entering the target point A, a stratum dip angle beta is predicted by using depth data of first and last points of a preset distance drilled this time, the velocity model is updated by using the depth data of the first and last points of the preset distance drilled this time, the structure map is prepared again, a stratum dip angle gamma of a next drilling distance of the horizontal section is predicted by using the prepared structure map again, and a reference stratum dip angle theta of the next drilling distance of the horizontal section is determined according to the three stratum dip angles alpha, beta and gamma, so as to serve as a guide for drilling of the horizontal well. The method can effectively improve a high-quality shale drilling ratio of the shale gas horizontal well, improve drilling efficiency of the horizontal well and save drilling cost.

This application discloses a Kirschner wire chuck and a bone-powered drill, relating to the field of medical device technology. The Kirschner wire chuck includes a chuck body, a clamping assembly, a locking assembly, and a handle mechanism. The chuck body is connected to a bone-powered handpiece. The clamping assembly is rotatably mounted on the chuck body and has a cavity along its rotation axis. The cavity holds the Kirschner wire, and the end of the clamping assembly is drively connected to the output end of the bone-powered handpiece. The locking assembly is sleeved on the clamping assembly and moves along its rotation axis to clamp or release the clamping assembly. The handle mechanism is mounted on the chuck body and deflects from the beginning to the end of the clamping assembly, and is connected to the locking assembly. Gripping the handle mechanism and deflecting it moves the locking assembly toward the beginning of the clamping assembly, causing the clamping assembly to clamp the Kirschner wire. This Kirschner wire chuck facilitates single-handed operation for clamping or releasing the Kirschner wire, improving drilling efficiency.

The utility model discloses a three-hole punching, rubberizing and framing all-in-one machine, and relates to the technical field of fungus bag processing, the three-hole punching, rubberizing and framing all-in-one machine comprises a rack and a conveying mechanism, a punching mechanism, a rubberizing mechanism, a framing mechanism and a bag grabbing and moving mechanism which are arranged in sequence, the conveying mechanism can convey fungus bags, and the punching mechanism can punch three holes in the fungus bags at the same time; according to the full-automatic packaging machine, punching, rubberizing and framing are integrated, manual intervention can be reduced, full-process automatic processing is achieved, and the overall processing efficiency is remarkably improved.

The application discloses a PDC drill bit suitable for continuous and rapid drilling of a limestone stratum and application thereof. The drill bit comprises a drill bit body, the drill bit body is provided with a blade wing, and the blade wing is provided with cutting teeth arranged in double lines. The double lines comprise a main line and a secondary line, the main line and the secondary line are located on the same crown line, the main line is located on an infeed contact surface of the blade wing, and the secondary line is located behind the main line. The cutting teeth comprise plane teeth and flow-passing special-shaped cutting teeth, the main line is provided with main line plane teeth, and the secondary line is provided with flow-passing special-shaped cutting teeth. The flow-passing special-shaped cutting teeth are provided with a through tooth flow passage, and the blade wing is provided with a blade wing flow passage corresponding to the tooth flow passage. The application adopts the same crown line double line tooth arrangement, greatly reduces the impact force on the cutting teeth, and avoids early damage of the cutting teeth. The application is provided with the tooth flow passage and the blade wing flow passage, improves the cooling effect of the cutting teeth, avoids thermal damage of the cutting teeth, prolongs the service life of the cutting teeth, and ensures that the drill bit has continuous aggressiveness.

The utility model relates to the technical field of furniture processing, in particular to a punching device for furniture processing, which comprises a workbench, a sliding chute is arranged at the top of the workbench, and a movable plate is slidably connected in the sliding chute. A second electric push rod drives a pressing plate to press and position a wood plate, the adjustability of an extension plate enables some special-shaped plates to be effectively fixed, an electric perforating machine rotates and moves downwards to perforate the wood plate, a drilling groove is formed to achieve the effect of preventing a cutter from being collided, a crank drives a round pipe to rotate, the round pipe drives a screw to be screwed out, and the wood plate is fixed through the screw. The screw drives the movable plate to slide out of the sliding groove through the vertical plate, the scale marks are arranged on the front side and the rear side of the movable plate, the transverse movement distance of the wood plate, namely the hole distance between two hole positions, can be directly measured through the difference value between the scale marks and the initial zero point parts of the scale marks, and the wood plate does not need to be taken down to measure the hole distance and then conduct positioning and punching. Therefore, the drill bit can be quickly aligned with the preset hole position, and the punching efficiency is improved.

The utility model discloses an adjustable punching device for automobile sheet metal part processing, which comprises a working table, four supporting legs are fixedly connected to the bottom of the working table, a clamping structure is arranged at the top of the working table, a shell is fixedly connected to the top of the working table, an electric push rod is fixedly connected to the bottom in the shell, and the electric push rod is fixedly connected to the bottom in the shell. The extending end of the electric push rod is fixedly connected with a mounting plate, the bottom of the mounting plate is fixedly connected with a punching motor, one end of the punching motor is connected with a gear disc through a transmission structure, the top of the gear disc is provided with a limiting structure, and the bottom of the mounting plate is fixedly connected with an adjusting motor. Through mutual cooperation of the workbench, the mounting plate, the shell, the gear disc and other components, when drill bits with different diameters need to be used, the gear disc can be automatically adjusted to enable the drill bits with different diameters to be located above a sheet metal part, the drill bits do not need to be mounted and dismounted, and therefore the punching efficiency of the sheet metal part is improved, and operation is easy, convenient and rapid.

This application discloses a high-pressure brine-resistant filtration loss reducer and its preparation method, belonging to the field of oil and gas well drilling engineering. Based on the requirements for resistance to complex salts, especially calcium and magnesium, this application optimizes the molecular structure of the high-pressure brine-resistant filtration loss reducer and introduces an acryloylmorpholine monomer, significantly improving its temperature resistance, stability, and salt tolerance. Since the copolymerization reaction of the selected monomer is relatively simple, the polymerization reaction adopts free radical solution polymerization. The prepared filtration loss reducer has achieved good performance in both laboratory and field application evaluations.

The utility model provides a kind of wall drilling device for fire engineering, including bottom plate, the upper end right side of bottom plate is symmetrically provided with sliding slot, the inside of sliding slot is slidably provided with slide column, the inside of sliding slot is provided with the drive unit for driving slide column to move, the upper end of two slide columns is jointly connected with fixed plate, the right end of fixed plate is provided with mounting plate, and drilling wall piece is provided on mounting plate, the front and rear ends of mounting plate are both provided with fixed frame, rotatingly provided with rotating column in the inside of fixed frame, the both ends of rotating column extend to the outside of fixed frame and are jointly connected with rotating plate, through the wall drilling device for fire engineering of the utility model, not only dust generated in the process of drilling can be adsorbed by dust cover, improve working environment quality, but also the angle of dust cover dust suction can be adjusted by rotating rotating plate, ensure that it is always in the best dust suction position, effectively capture dust generated in the process of drilling, avoid dust to escape.

The application discloses a coal mine geological drilling device and belongs to the technical field of geological drilling. The coal mine geological drilling device comprises a supporting seat, a drill rod, a driving assembly, an energy storage assembly and a sealing assembly. The driving assembly is used for driving the drill rod to rotate and lift. The drill rod is provided with a cavity, a water guide hole, a water inlet and a mounting hole. The diameter of the water guide hole is smaller than that of the cavity. The energy storage assembly comprises a first movable plate, a second movable plate, two centrifugal driving modules and a plurality of first springs. The first movable plate and the second movable plate are slidably inserted into the cavity in the vertical direction, so as to sequentially divide the cavity into a first chamber, a second chamber and a third chamber. The sealing assembly is used for controlling the on-off of the water guide hole. The coal mine geological drilling device can make the cooling water flow out at a large pressure when the coal mine geological drilling is performed, so that the situation that impurities block the water guide hole in the drilling process is avoided, and the drilling efficiency is improved and the service life of the drill rod is prolonged.

The utility model provides a sheet part punch tapping indexing device, including rotation indexing mechanism, rotation indexing mechanism includes the fixed baseplate of being fixedly connected with drill press concentrically, rotation indexing mechanism still includes rotation baseplate, rotation baseplate concentric indexing rotation relative fixed baseplate, and rotation baseplate drives rotation through the hand wheel drive mechanism of installation in vertical side surface, hand wheel drive mechanism drives rotation baseplate rotation through right angle bevel gear transmission, rotation baseplate concentric fixedly links nut pressure mechanism and drives nut pressure mechanism concentric rotation, and nut pressure mechanism includes support frame, and support frame realizes sheet part synchronous rotation through the concentric pressure fixed installation sheet part of nut and elastic pad. The utility model reduces sheet part punch tapping waste rate to 2%, compact structure, convenient operation, guaranteeing accuracy reduces processing cost at the same time.

This invention discloses a method and apparatus for drill bit matching degree analysis, relating to the field of oil and gas drilling and completion technology. The method includes: acquiring historical drilling data of the well section to be analyzed; determining the index values ​​corresponding to multiple drill bit analysis indices for each type of drill bit based on multiple drill bit analysis indices and multiple drill bit usage data; determining the matching degree relationship between each type of drill bit and different thicknesses of the well section to be analyzed based on the correlation between the multiple drill bit analysis indices and the thickness of the well section, and the index values ​​corresponding to the multiple drill bit analysis indices for each type of drill bit; the correlation between the multiple drill bit analysis indices and the thickness of the well section is the comprehensive drilling cost data for well sections of different thicknesses; and determining the matching degree between each type of drill bit and a specified thickness based on the matching degree relationship between each type of drill bit and different thicknesses of the well section to be analyzed. This invention can provide comprehensive and accurate drill bit matching degree analysis results.

The utility model discloses a door lock support quick punching mechanism, which aims at solving the technical problem of time-consuming, laborious, high cost and low efficiency in the prior art, which needs to design multiple sets of workpiece positioning mechanisms and frequently replace and fix different workpiece positioning mechanisms to realize the drilling operation of the five through holes of the door lock support, comprising a door lock support, a door lock support quick positioning mechanism and a bench drill, the door lock support comprises a first through hole, a second through hole, a third through hole, a fourth through hole and a fifth through hole; the door lock support quick positioning mechanism is detachably connected to the workbench of the bench drill; the door lock support quick positioning mechanism comprises a disc-shaped fixing seat detachably connected with the workbench of the bench drill and a cylindrical abutment main body fixedly connected with the fixing seat; the abutment main body comprises a circular positioning platform arranged at the top; the positioning platform comprises a first through hole arranged at the center of the platform, a first positioning groove, a second positioning groove and a third positioning groove matched with the main plate respectively.

The utility model provides a kind of bill binding and punching device, it is related to binding and punching equipment technical field, including main frame body, aperture module and side extension support, the upper part of main frame body is vertically slidably connected with aperture module, the lower part of aperture module is provided with side extension support, the middle part of side extension support is rotatably connected with extension threaded rod, the first end of side extension support is slidably connected with first connection swing frame, the lower part of side extension support is rotatably connected with extension drill chuck, the first end of side extension support is fixedly connected with sliding slot connecting frame, the middle part of sliding slot connecting frame is slidably connected with middle transfer shaft support, and the lower end of middle transfer shaft support is circumferentially rotatably connected with gear. Extension drill chuck and main drill chuck synchronous rotation carry out punching operation to bill, can complete double-hole opening once, compared with the single hole of traditional single-hole equipment, punching efficiency is improved by more than 1 times, solve the problem that traditional equipment is single drill chuck design, efficiency is difficult to meet high-frequency demand.

The invention relates to the technical field of power grid laying, and provides a power grid stringing drilling and pole erecting device which comprises a vehicle body, driving mechanisms are arranged on the two sides of the vehicle body, a collecting mechanism is arranged on the front side of the vehicle body, a guiding mechanism is arranged in the collecting mechanism, a drilling and erecting mechanism is arranged on the rear side of the vehicle body, and the collecting mechanism comprises a supporting arm. The two supporting arms are arranged on the two sides of the vehicle body, connecting rods are arranged at the front ends of the two supporting arms, a first collecting shell is arranged in the middle of each connecting rod, a second collecting shell is hinged to one side of each first collecting shell, clamping grooves are formed in the top walls of the first collecting shells and the top walls of the second collecting shells, and clamping plates are clamped in the two clamping grooves. According to the electric pole drilling and erecting device, through the arrangement of the collecting mechanism and the guiding mechanism, the follow-up work of adjusting the perpendicularity of an electric pole by a worker and shoveling soil and filling a pit can be reduced, and then the effect of improving the drilling and erecting efficiency is achieved.

The utility model relates to the technical field of fishing gear processing, and discloses a fishing rod punching device for fishing gear production, which comprises a processing table, the top of the processing table is fixedly connected with a first motor, an output shaft of the first motor is fixedly connected with a first reciprocating screw rod, and the first reciprocating screw rod is in threaded connection with a sliding plate. A first mounting plate is slidably connected to the interior of the sliding plate, a hydraulic rod is fixedly connected to the bottom of the first mounting plate, a mounting block is fixedly connected to the output end of the hydraulic rod, a second motor is fixedly connected to the outer side of the mounting block, and a connecting block is fixedly connected to the outer side of the second motor. The fishing rod punching device for fishing gear production has the advantages that multiple positions of a fishing rod are punched at the same time, the punching efficiency is high, the situation that the punching precision is reduced due to position deviation caused by vibration during punching of the fishing rod is prevented, and chippings generated during punching are protected and blocked.

This utility model discloses a rubber stopper drilling device, including a base, with side columns installed on both the left and right sides of the upper end of the base. A top plate is fixed to the top of each side column, and a cylinder is installed on the top plate. A push rod is fixed to the output end of the bottom of the cylinder, and a pressure block is fixedly sleeved on the bottom end of the push rod. A rubber stopper positioning mechanism is movably inserted into the slot. The rubber stopper positioning mechanism includes an upper positioning block and a lower positioning block. A drilling pin insertion hole is opened on the upper positioning block, and a second retaining ring and a rubber stopper insertion hole are opened on the upper end face of the lower positioning block. A drilling pin is inserted into the drilling pin insertion hole, which can meet the drilling requirements of different specifications of rubber stoppers. Under the premise of stable fixing of the rubber stopper, the cylinder drives the pressure block to drill multiple rubber stoppers at one time, which greatly improves the drilling efficiency of rubber stoppers. The operation is simple and convenient, and disassembly and replacement are also more convenient.

The utility model provides a flange drilling machining device, which relates to the technical field of flange drilling machining, and comprises a machining table, a rotating roller, a gear transmission assembly, a turntable, a fixing piece, a mounting table, a telescopic piece, a disc, a driving motor and a drill bit, according to the device, the positioning process of the flanges is convenient and fast to operate, the flanges can be sequentially and automatically drilled after feeding and positioning of the multiple flanges are completed, the movement positions of the hydraulic chucks are accurate in the drilling switching process, machining of all bolt holes in one flange can be completed at a time in each round of drilling process, and the machining efficiency is improved. And the drilling efficiency of the flange is effectively improved.

The utility model discloses an auxiliary punching die for a connecting plate of a high-speed rail opening and closing mechanism, which relates to the technical field of auxiliary tools and is used for solving the technical problems of inaccurate punching position and lower efficiency. The auxiliary punching die for the connecting plate of the high-speed rail opening and closing mechanism comprises a bottom plate, and a plate-shaped die part and a convex die part are arranged on the bottom plate; the bottom of the plate-shaped die part and the bottom of the protruding die part are vacant reserved spaces, the shape of the reserved spaces is matched with that of the opening and closing mechanism connecting plate, a plurality of first auxiliary holes are formed in the plate-shaped die part, and a plurality of second auxiliary holes are formed in the protruding die part. According to the punching device, the punching position is accurate, manual measurement is not needed, the time needed for punching is shortened, the punching efficiency is improved, meanwhile, the labor intensity of workers is reduced, and the technical problems that the punching position is not accurate and the efficiency is low are well solved.

The application discloses a kind of laser-assisted drilling rock breaking intelligent control system and method, comprising: perception module, for obtaining the state information of each component of laser drill, tunneling parameter and drill drilling force;Decision module is used to determine whether the operation of laser drill is normal according to the state information of each component of laser drill, determine the surrounding rock grade under the current tunneling state according to tunneling parameter, and determine the drilling pressure difference between each drill tooth according to drill drilling force, and determine whether the drilling direction of drill is deviated by the drilling direction deviation occurrence threshold value;Execution module is used to determine whether to issue alarm and close laser drill according to the operation of laser drill determination result, select to start corresponding drilling mode according to surrounding rock grade, and adjust laser beam exit angle according to the drilling direction of drill determination result.Advantages: improve tunneling efficiency, ensure drilling stability and safety.

This utility model relates to a header drilling device, comprising: a base, set on the ground; a frame, set at a first end on the base, with a chuck rotatably mounted at a second end of the frame; a first support, set at a second end on the base; a header, horizontally positioned, with an opening at its first end, the inner side of which engages with the chuck's jaws, and its second end engaged with the first support; and a three-axis gantry frame, erected on the ground, with a motor fixed to the moving end of the three-axis gantry frame 1. The three-axis gantry frame drives the motor to move along the X, Y, and Z axes, and a drill bit is mounted on the lower output end of the motor, with the drill bit vertically positioned. The base is located inside the three-axis gantry frame, and the motor's movement path passes through the header. When it is necessary to drill parallel holes in the header, the fixing of the second end of the header is released, the frame drives the chuck to rotate, and the chuck rotates the header to a set angle, engaging the second end of the header with the first support. The structure is simple, easy to use, and can achieve drilling multiple rows of holes on the outside of the header.

The utility model discloses a combined type spliced anti-slide pile square drill bit, and particularly relates to the technical field of drill bits, the combined type spliced anti-slide pile square drill bit comprises a bottom shell, a top cover, a connecting frame, a fixed flange, a driving mechanism, a shaft bracket, a transmission assembly, a rotating assembly, a first drill body and a second drill body, the driving mechanism is composed of a motor, a driving rod and a driving gear, and the driving mechanism has a driving function; the transmission assembly can transmit the two second drill bodies at the same time. The shaft bracket structure can improve the rotation smoothness; the shifting block on the surface of the drill body facilitates soil drilling and soil cleaning. Square holes punched by the square hole punching device are standard, square hole drilling can be directly carried out, the punching efficiency is high, the square hole punching device is more convenient to use, and the square hole punching device has the advantage of high practicability.

This invention relates to the field of sheet metal processing technology, and particularly to an integrated machine for slotting and drilling cable reels. The integrated machine includes a base, a support column at the top of the base, a transverse support frame fixedly connected to the top of the support column, longitudinal support frames on both sides of the transverse support frame, and a second electric slide rail fixedly mounted on each of the two longitudinal support frames. A second sliding block is slidably fitted onto the surface of each of the two second electric slide rails. A fixing block is installed below the left longitudinal support frame, and a screw drill and a drive hole machine are located below the right longitudinal support frame. A controller is mounted on the base. The advantages of this invention are: the device can quickly adjust the drilling position and depth, enabling drilling operations at different positions and depths on cable reels; the screw drill and the drive hole machine can work simultaneously, significantly improving drilling efficiency in conjunction with the rotation of the rotating disc, meeting the needs of large-scale cable reel production.

The efficient drilling device for stone machining comprises a machining table, a drilling assembly is arranged at the top of the machining table, an automatic recognizer is fixedly installed on one side of the drilling assembly, a protective mirror is fixedly installed at the bottom of the automatic recognizer, a swing motor is fixedly installed at the bottom of the drilling assembly, and the swing motor is fixedly connected with the machining table. An adjusting plate is fixedly installed at the output end of the swing motor, cleaning cotton is fixedly installed at the top of the adjusting plate, and the cleaning cotton is in sliding connection with the protective glasses. According to the efficient drilling device for stone machining, an automatic recognizer, a protective mirror, a swing motor, an adjusting plate and cleaning cotton are arranged, the automatic recognizer can specify the drilling position, the swing motor can drive the cleaning cotton to slide on the surface of the protective mirror, and dust on the surface of the protective mirror can be removed conveniently; and dust generated by drilling is prevented from blocking the surface of the protective goggles to affect recognition, so that the recognition of the automatic recognizer is more accurate, and the efficiency of stone machining and drilling is improved.

The utility model discloses a pitch measuring device, which relates to the technical field of pitch measurement and comprises a movable support, the movable support is composed of an L-shaped supporting rod, a first anti-falling plate, a second anti-falling plate, a supporting base ring and a reset spring, and the pitch measuring device composed of the movable support, a measuring graduated scale and a movable marking piece is arranged on a workpiece clamp. According to the device, the hole distance can be efficiently and accurately measured and positioned in the workpiece punching process, the required hole distance can be rapidly adjusted and accurately locked through flexible sliding of the movable marking piece on the measuring graduated scale, and the hole distance can be accurately measured by matching sliding adjustment of the movable support on the workpiece clamp and up-down displacement of the measuring graduated scale. The movable marking piece can be ensured to be accurately attached to the surface of the workpiece and accurately position the position to be punched, a drill bit of punching equipment can directly work through the marking hole, the problems of reading errors, marking deviation and the like existing in a traditional measuring tool are effectively solved, and repeatability and consistency of hole distance measurement are remarkably improved.

The invention discloses a reamer with replaceable cutting teeth, and belongs to the technical field of underground reaming, the reamer comprises a shell, a blade part is arranged on the shell, two ends of the blade part are connected with cutting tooth groups suitable for different stratums, the blade part can swing by taking the blade part as an axis, a driving part is arranged in the shell, and the driving part can axially slide along the shell through drilling pressure. A switching assembly is arranged between the shell and the driving part, the switching assembly can rotate relative to the driving part, and when the driving part slides in the axial direction of the shell, the switching assembly rotates relative to the driving part, so that the two cutting tooth sets of the blade part alternately stretch out, and the cutting modes are switched. When different cutting teeth are switched, complete tripping operation is not needed, and the non-drilling auxiliary operation time is remarkably shortened, so that the comprehensive drilling efficiency is improved; and secondly, the time cost, the equipment loss and the labor cost caused by frequent complete tripping are avoided, and the total drilling cost of a single well is effectively reduced.

The present application belongs to the technical field of drilling tools, and discloses a hydraulic driving downhole impact device; the impact device comprises an impact device main body, a lower end of the impact device main body is provided with an impact main body, a drilling fluid main channel, a first shunt channel and an inner cavity are arranged in the impact device main body; a flow discharge channel is arranged on the other side of the drilling fluid main channel and the inner cavity, a piston type transmission rod, a transmission mechanism, a first partition structure and a second partition structure are arranged in the inner cavity, and a first pressure boosting port and a second pressure boosting port are arranged between the first partition structure and the second partition structure. The present application realizes the up-and-down lifting of the piston type transmission rod by utilizing the pressure of the drilling fluid, so that the impact main body realizes automatic impact; the downhole impact device designed by adopting the scheme has the advantages of simple structure, low cost, strong practicability, no electronic components, and better adaptability to compact lithology difficult-to-drill strata, and can effectively improve the drilling efficiency.