42results about How to "Improved drilling stability" patented technology

The invention relates to a three-stage one-stroke hydraulic pressurizer applied to drilling of conventional wells, slim holes and micro-holes. The technical scheme of the three-stage one-stroke hydraulic pressurizer is that an upper joint, different stages of piston cylinders and a lower joint are connected sequentially through threads; the lower end of the upper joint of the hydraulic pressurizer is connected with a third-stage piston cylinder through threads; the third-stage piston cylinder and a second-stage piston cylinder are connected with a main piston cylinder; a third-stage piston, a second-stage piston and a main piston are mounted in the corresponding cylinder bodies respectively; the main piston cylinder and a main piston rod are flexibly connected through a roller mounted on the cylinder body and a keyway formed in the piston rod; the upper end of the main piston rod is connected with the main piston through threads, and the lower end of the main piston rod is fixed on the lower joint through threads. With adoption of the hydraulic pressurizer, mud power is converted into axial thrust, so that constant bit pressure is applied to a drill bit, the bit pressure transfer efficiency can be increased, the problems of bit jumping, backing pressure and the like are solved effectively, the service life of the drill bit is prolonged, fatigue failures of a drilling tool are reduced, and drilling efficiency is increased.

The invention provides a heavy shock absorber for drilling operation. The heavy shock absorber comprises a mandrel, a shock absorption shaft and an upper connector which are coaxially arranged and connected in a threaded mode in sequence, and a centering sleeve is coaxially connected with the outer side of the mandrel. The heavy shock absorber further comprises a shock absorption sleeve, one end of the shock absorption sleeve is connected with the centering sleeve, and the other end of the shock absorption sleeve is connected with the upper connector; the shock absorption sleeve and the mandrel are flexibly connected through pin rollers fixed to the shock absorption sleeve and keyways formed in the mandrel; a shock absorption element is arranged between the shock absorption sleeve and the shock absorption shaft, an interval exists between the shock absorption element and the shock absorption sleeve, the shock absorption element and the shock absorption shaft are sealed through a bush, and the two ends of the shock absorption element are each provided with a set of wear-resistant ring and guide ring in direct contact with the shock absorption sleeve and the shock absorption shaft. The shock absorption sleeve and the shock absorption shaft form flexible connection through the pin rollers, the keyways and the wear-resistant rings, point contact is adopted for torque transmission, friction is reduced, torque is transmitted reasonably and effectively, and the service life is prolonged; a rubber cylinder is adopted as the shock absorption element, and the shock absorption effect is better.

A method for drilling a borehole employing a drilling fluid including an additive comprising a glucose derivative with pH lowering acid, buffers and surface active agents. The drilling fluid additive preferably exhibits the following properties: activity of approximately 30%–45% in water solution; pH of about 4.5 to 5.5; a light amber to clear liquid appearance and a density of approximately 1.200 grams per cubic centimeter.

The invention discloses a press pin switching device of a printed circuit board (PCB) boring machine and a switching method thereof. The press pin switching device comprises a spindle unit, a scrap absorption cover unit and a worktable unit. One end of the scrap absorption cover unit is connected with the spindle unit, and the worktable unit is arranged below the scrap absorption cover unit. The scrap absorption cover unit comprises a rectilinear motion device, a sliding device and a scrap absorption cover main body. The rectilinear motion device and the sliding device are arranged on the scrap absorption cover main body. The sliding device comprises a sliding base and a sliding plate arranged on the sliding base, and one end of the sliding plate is connected with the rectilinear motion device. A tool changing position used for meeting the tool changing requirement and a press pin position used for press pins in different sizes to be placed at are arranged on the sliding plate.

The invention provides a complex industrial detection device based on data-driven modeling and model-free adaptive control. The complex industrial detection device comprises a machining column and a base, wherein fasteners are symmetrically arranged on the base and used for fixing a device body, a mounting seat is arranged on the upper portion of the machining column, and a power device is arranged at the bottom of the mounting seat. According to the invention, the two ends of the device body are inserted into the fasteners, the handle is rotated, the power shaft rotates, the threaded sleeve rotates, then the threaded movable rod drives the trapezoidal base to move, the two coordination blocks and the trapezoidal base are arranged in a matched mode, the hinged inclined rod rotates downwards so as to jointly clamp the device body through the two clamping heads, the winding rope contracts to drive the mounting transverse column to move, then the angle of the mounting inclined rod is changed so as to drive the mounting sleeve block to slide on the mounting vertical column, and the movable contact sheet and the static contact sheet make contact with the alarm to give an alarm, so thatthe device body is reminded of fixing completion.

The invention discloses a PDC drill bit for well drilling. The PDC drill bit comprises a drill bit body, a plurality of cutting edges and a plurality of flushing openings. A flushing cavity is formed in the drill bit body; the top ends of the cutting edges are reduced in sequence to form a spiral line structure, the cutting edges are arranged at a crown part of the drill bit body in a protruding mode, the angles formed between the adjacent cutting edges are different, a discharging groove is formed between any two adjacent cutting edges, a plurality of cutting tooth and a plurality of auxiliary cutting edges are arranged on the same sides of the cutting edges, the auxiliary cutting edges are arranged in the centers of the discharging grooves in a protruding mode and have the number equal to that of the discharging grooves, the tops of the auxiliary cutting edges are located at the midpoints of the connecting line of the top of the highest cutting edge and the top of the lowest cutting edge, and a plurality of auxiliary cutting teeth are arranged on the auxiliary cutting edges in the direction of the same sides of the cutting edges. The flushing openings are communicated with the flushing cavity. The problem that when a drill bit generates unbalanced force at the bottom of a well, the drill bit deflects is solved, and hole drilling stability is greatly improved.

The present invention proposes a high-pressure water jet drilling equipment and construction method for bolt construction in mines. The equipment includes a working part and a control part, and the working part includes a casing and an injector arranged inside the casing and a propeller, the injector is used to inject high-pressure water flow to the target area to realize drilling, the propeller is connected with the injector in transmission, and is used to drive the injector to move back and forth, and the control part includes a water pump microcomputer and a high-pressure water pump , the water pump microcomputer is connected with the high-pressure water pump, and the high-pressure water pump is connected with the injector through the water inlet pipe. The invention synchronizes the drilling and hole cleaning, which improves the efficiency of anchor rod construction. Compared with the traditional metal drill bit drilling, the high-pressure water jet has the advantages of high drilling alignment, low drilling temperature, and drilling stability. Advantages of high quality and high security.

The invention provides an instrument for an orthopedic implant. The instrument is used for solving the problem that an existing orthopedic drilling tool is prone to causing soft tissue injury. Comprising a sleeve; the transmission rod is provided with a transmission piece located at one end of a rod body, the transmission piece is located in the sleeve and provided with a first containing groove, and a plurality of first meshing teeth are arranged around the first containing groove; the drilling rod is provided with a plurality of second meshing teeth which are arranged around a second containing groove, a combination part is located between the second containing groove and a blade part, the combination part is combined with the sleeve, and the blade part is located outside the sleeve; and the two magnets are respectively arranged in the first accommodating groove and the second accommodating groove, and the same poles of the two magnets are opposite to each other.

The invention provides a three-hole one-time equilibrium drilling device for a solar mirror bracket. The three-hole one-time equilibrium drilling device comprises a rectangular base, two double-hole drilling units, two single-hole drilling units, one mirror bracket bearing unit and two axial limiting units. The three-hole one-time equilibrium drilling device provided by the invention is symmetrically arranged on the rectangular base by adopting the two double-hole drilling units and two single-hole drilling units, so that two sides are respectively subjected to symmetrical drilling, the two sides are in force balance, not only is the drilling efficiency high, but also higher drilling stability is obtained, and the drilling accuracy is ensured.

The invention relates to a three-stage one-stroke hydraulic pressurizer applied to drilling of conventional wells, slim holes and micro-holes. The technical scheme of the three-stage one-stroke hydraulic pressurizer is that an upper joint, different stages of piston cylinders and a lower joint are connected sequentially through threads; the lower end of the upper joint of the hydraulic pressurizer is connected with a third-stage piston cylinder through threads; the third-stage piston cylinder and a second-stage piston cylinder are connected with a main piston cylinder; a third-stage piston, a second-stage piston and a main piston are mounted in the corresponding cylinder bodies respectively; the main piston cylinder and a main piston rod are flexibly connected through a roller mounted on the cylinder body and a keyway formed in the piston rod; the upper end of the main piston rod is connected with the main piston through threads, and the lower end of the main piston rod is fixed on the lower joint through threads. With adoption of the hydraulic pressurizer, mud power is converted into axial thrust, so that constant bit pressure is applied to a drill bit, the bit pressure transfer efficiency can be increased, the problems of bit jumping, backing pressure and the like are solved effectively, the service life of the drill bit is prolonged, fatigue failures of a drilling tool are reduced, and drilling efficiency is increased.

The invention discloses an engineering driller comprising a power head, a driving drill rod, two feeding oil cylinders, a portal frame and a chuck for vertically fixing the driving drill rod opposite to a stand, wherein the driving drill rod vertically passes through a main shaft of the power head, the portal frame comprises a left vertical post and a right vertical post, and both sides of the power head are respectively clamped on the left vertical post and the right vertical post and are in single-freedom sliding fit with vertical posts at the corresponding side; and the two feeding oil cylinders are respectively fixed and arranged at the bottoms of the left vertical post and the right vertical post, piston rods of the feeding oil cylinders are vertically and upwards fixed with the power head below which the chuck is arranged, and the driving drill rod is clamped in the chuck. A power head support frame of the engineering driller adopts a portal vertical post structure, both sides of the power head are respectively clamped on the left vertical post and the right vertical post of the portal frame, the power head moves up and down through the feeding oil cylinders, the stroke can be about 1 meter, and therefore, the engineering driller has high precision of vertical movement; because the chuck is arranged below the power head, an operator can directly operate the engineering driller without climbing the driller; and the engineering driller has the advantages of safety, convenience and high efficiency.

An anti-destructive ground drilling gas drainage method belongs to the technical field of coal mine gas drainage methods, which can solve the problems that the ground vertical drilling is easily damaged due to the movement of the working face, and the construction of L-shaped drilling is difficult and costly. Before coal seam mining, Spud drilling from 3‑5 m outside the edge of the surface mobile basin, drill vertically downward to stop at 30‑50 m above the fractured zone, and then go down into a vertical rigid pipe; inwardly stagger the direction of 40‑60° return airway Deviation; the drilling section from the beginning of deflection to the junction of the upper boundary line of the collapse zone and the mining stress boundary line on the side of the return airway is run into the flexible casing, and the upper boundary line of the collapse zone and the mining stress boundary on the side of the return airway The flexible screen pipe is lowered into the drilling section from the junction of the line to the floor of the mining coal seam, and the surface wellhead is connected with the pumping station. The invention solves to a certain extent the problem of damage to surface drainage drilling caused by advancement of the working face, and greatly improves drilling stability.