14results about How to "Avoid sanding" patented technology

The invention discloses a numerical simulation method for evaluating gas well sand production critical yield. Mainly solves the problem of sand production of the gas well caused by overhigh production pressure difference and gas production speed in the gas testing and production process after the existing gas well is fractured. The method is characterized by comprising the following steps: establishing a gas well sand production critical mathematical model; according to a gas phase flow equation, the critical bottom hole flowing pressure, the critical production pressure difference and the critical production speed in the critical state are obtained through calculation, the critical flow speed and the critical yield in the production process are obtained according to different wellhead pressure changes, and a reasonable oil and gas well working system is formulated according to the critical flow speed and the critical flow. According to the numerical simulation method for evaluating the gas well sand production critical yield, the critical flow velocity and the critical flow in the production process can be obtained according to different wellhead pressure changes, so that a reasonable oil and gas well working system is formulated, and formation sand production is prevented.

The present invention discloses a method for deep unblocking of a fixed pipe column of an oil well with complex blockage in an offshore oil field. The present invention adopts a new unblocking process of "bubble-unblock-wash-test-pressure-wash", and the specific method is: treatment of organic scale in the wellbore and near the well: conduct injection process, pump-inject organic unblocking agent, and soak for 12 to 48 hours; treatment of inorganic scale in the wellbore and near the well: pump-inject inorganic unblocking agent, shut down the well for 6 to 24 hours after unblocking; well washing operation; stepped pressure test injection, shut-in test; treatment of composite blockage in medium and long-distance wells: staged high pressure and large liquid volume injection; well washing operation. The method of the present invention is suitable for unblocking complex blockages in oil wells with heavy crude oil or polymer organic scale and inorganic scale and large blockage radius in offshore oil fields, and has the advantages of reducing operating costs and simplifying processes; conducting test operations, with flexible selectivity to ensure the effectiveness of measures; high pressure does not break the reservoir, preventing sand from coming out of the formation or rapid decrease in liquid volume after operation; large liquid volume injection, unblocking and instantaneous replenishment of formation energy.

The invention discloses multi-color heating coloring glassware forming equipment and an implementation method, and belongs to the technical field of glassware processing. The multi-color heating coloring glassware forming equipment comprises a base, a second sliding rod is transversely welded to the upper end of the base, and a connecting frame is transversely and slidably arranged in the second sliding rod. According to the high-temperature glassware forming device, the problems that the amount of glass liquid fed into a mold cannot be accurately controlled, the glass liquid overflows and is wasted in an existing glassware forming device are solved, an extrusion block is longitudinally pressed through a telescopic rod, so that the extrusion block extrudes the glass liquid to form high-temperature glassware, and the high-temperature glassware is formed. The redundant glass liquid flows to the upper end of the mold, the glass liquid at the upper end of the mold is cut by the cutting piece along with extrusion of the telescopic rod, the cut glass liquid is subsequently pushed by the cutting piece, so that the glass liquid is stored in the collecting barrel, and the glass liquid stored in the collecting barrel can be directly and repeatedly used.

The invention relates to the technical field of grinding, and discloses a wood shelf after-cutting area grinding device which comprises a workbench, U-shaped frames are fixedly connected to the two sides of the workbench, a motor is fixedly connected to the bottom of the workbench, and a transmission shaft is fixedly connected to the output end of the motor; the end, away from the motor, of the transmission shaft is fixedly connected with a fixing frame, and the surface of the fixing frame is fixedly connected with an electric push rod. By arranging the fixing mechanism, a circular wood plate is firstly placed on the surface of a rotating disc, then an electric push rod is started to push the rotating disc to move upwards, when the rotating disc moves, a sliding plate can be driven to move upwards, and when the sliding plate moves, an elastic plate can be pushed to move upwards and extrude the rotating disc; when the elastic plate is extruded, the middle portion of the elastic plate can push the sliding groove plate to move in the direction close to each other, when the elastic plate is bent to a certain position, the rotating disc can be limited, and when the sliding groove plate moves, the sliding frame can be pushed to move in the direction close to each other.

This invention discloses a detachable lifting clamp fixture for ships. It includes a connecting assembly, a driving assembly, and a suspension assembly. The connecting assembly includes a clamping member and a top support member. The clamping member can clamp and fix the web of a pre-shaped profile, and the top support member can abut against the panel of the pre-shaped profile from top to bottom. The driving assembly is connected to the connecting assembly to drive the connecting assembly to clamp and release the web. The suspension assembly is connected to the connecting assembly and is used to install the lifting clamp. Through the clamping member and the top support member, the pre-shaped profile can be detachably fixed in a clamping manner, and the lifting weight can be applied to both the web and the panel simultaneously. Compared with welding the lifting clamp, this avoids welding work, improves lifting efficiency, reduces lifting costs, and reduces damage to the hull structure. Furthermore, by distributing the weight, it reduces the risk of deformation and damage to the hull structure, especially the panel of the pre-shaped profile.

The application discloses a kind of production device of aluminum-clad door and window, it is related to aluminum-clad door and window production technical field, including clamping box, the inside of clamping box is equipped with clamping chamber, the inside welding of clamping chamber is equipped with guide pipe, the inside sliding connection of guide pipe is equipped with guide plate, the side end surface of guide plate is welded with clamping plate, the side end surface of clamping plate is welded with reset rod, the outside of reset rod is sleeved with reset spring, the unified height of the present application is fixed by wood board and aluminum profile, then control initiative roll rotation, the two sides of wood board and aluminum profile are all in unified vertical plane, so that wood board and aluminum profile are all fixed in same position, then wood board and aluminum profile can be simultaneously cut from the same angle by cutting edge, so that the riveting of each side aluminum profile and wood board is facilitated, and all wood board and aluminum profile are cut into same length specification, so that wood board and aluminum profile can be quickly adhered and formed once, without secondary processing.

The invention relates to a pipe annular abrasive belt grinding device which comprises a mechanical arm, a connecting device arranged on the mechanical arm and an abrasive belt and further comprises a driving device, a tensioning device and a grinding frame which are arranged on the connecting device, and the grinding frame is provided with a grinding groove. The moving devices are symmetrically arranged on the two sides of the grinding groove. The pressing device is arranged on the moving device; the grinding roller is rotationally arranged on the pressing device; the auxiliary rolling wheels are rotationally arranged on the pressing device and symmetrically located on the two sides of the grinding rolling wheel. The gap bridge roller is rotationally arranged on the polishing frame and the connecting device; the abrasive belt is movably arranged on the driving device, the tensioning device, the grinding roller and the gap bridge roller in a sleeving mode, the pressing device symmetrically presses the abrasive belt on the outer circle face of the pipe through the grinding roller, and the auxiliary roller is used for controlling the grinding diameter. According to the device, the two sides of the pipe are symmetrically ground at the same time, the grinding efficiency is greatly improved, meanwhile, the grinding size is accurately controlled through cooperation of the positioning wheel and the pressing device, and the grinding quality is high.

The invention discloses end cover burr and impurity polishing and cleaning equipment which comprises a workbench and an end cover plate body and further comprises a transverse table slidably arranged at the top of the workbench in the front-back direction, two clamping assemblies symmetrically arranged at the top of the transverse table in the left-right direction and a polishing assembly arranged at the top of the workbench and located on one side of the workbench. The two clamping assemblies play a role in clamping the end cover plate body, the grinding assembly plays a role in grinding the end cover plate body, and the end cover plate body clamped on the two clamping assemblies is ground through the grinding assembly to achieve burr grinding.

This utility model discloses a protective fixture for impregnating a new energy flat wire oil-cooled motor. It includes a motor stator winding, a lower pressure plate at the bottom of the stator winding, an impregnation bracket at the bottom of the lower pressure plate, a sealing barrel around the stator winding, a lower sealing gasket between the bottom of the sealing barrel and the lower pressure plate, and an upper pressure plate at the top of the stator winding, with an upper sealing gasket between the top of the sealing barrel and the upper pressure plate. By using the upper and lower sealing gaskets, this fixture, when fully immersed in insulating varnish, forms a completely reliable sealed cavity on the stator's outer surface, effectively preventing the entry of insulating varnish. This ensures that no insulating varnish penetrates during the impregnation process, and the stator's outer surface remains clean after curing. This avoids oil cooling blockage and the need for subsequent polishing of the insulating varnish on the stator's oil circuit area, protecting the stator and ensuring that motor performance is not affected.

The invention discloses a rock core electrical property testing device and method, and relates to the technical field of rock core electrical property testing, and the rock core electrical property testing device comprises a closed testing box body, a rotary lifting flexible supporting device, a visual analysis module, a supporting device controller based on a chip, an electrical property testing device and an electrical property analysis module. According to the invention, the to-be-tested rock core in an irregular shape is automatically positioned and supported through the rotary lifting flexible supporting device and the supporting device controller based on the chip, so that the rock core is prevented from being cut, polished and the like, and the distortion of the measured electrical property result caused by the damage to the original structure of the to-be-tested rock core is avoided. The electrical performance test control circuit board and the electrical performance analysis module are combined, so that voltage and current data can be acquired in real time, and a detailed electrical performance test result of the core to be tested is analyzed and output based on a test value. The automation level, the test precision and the test efficiency of the core electrical property test can be obviously improved, and the operation difficulty and the maintenance cost are reduced.

A reusable light guide pipe embedded assembly comprises a light guide pipe sleeve, a water stop rubber sleeve and a steel bar positioning ring, one end of the light guide pipe sleeve is provided with a tongue-and-groove, and the outer diameter of the end provided with the tongue-and-groove is larger than that of a light guide pipe sleeve body; the periphery of the light guide pipe sleeve is sleeved with at least two water stop rubber sleeves at intervals, and the water stop rubber sleeves are close to the ends of the light guide pipe sleeve. The periphery of the water stop rubber sleeve is sleeved with a reinforcing steel bar positioning ring for fastening, and the fastening degree of the reinforcing steel bar positioning ring meets the requirement that after the light guide pipe pre-embedded assembly is pre-embedded in a bare concrete wall, the light guide pipe sleeve can be pulled out of the bare concrete wall to form a light guide pipe mounting hole. When the light guide pipe pre-embedded assembly is pre-embedded in the bare concrete wall, the light guide pipe sleeve can be pulled out and reused, and the problems that a light guide pipe sleeve pre-embedded part is high in machining cost and long in construction period are effectively solved.

The invention provides a waterproof top cover for a prefabricated cabin, and belongs to the technical field of power equipment structures, and the waterproof top cover comprises a first top plate, an internal rainproof beam arranged at the bottom of the first top plate, and a fixing assembly mounted at the bottom of the internal rainproof beam. The split type top plate combination is matched with the precise bending butt joint mechanism, the welding workload is greatly reduced while the structural strength is guaranteed, the problems of large-area welding seam polishing and rusting are solved, reliable sealing between modules is achieved through the butt joint bending clamping structure, the defect of water seepage of joints of a traditional modular top cover is overcome, and the service life of the modular top cover is prolonged. According to the integrally-designed water dripping edge system, a traditional welding or screw fixing mode is replaced with an innovative bending forming technology, the installation procedure is simplified, the protection grade is improved, the overall weight is reduced through the optimized structural layout, transportation and hoisting operation is facilitated, and the production cost is reduced while the production efficiency is improved. And the waterproof performance and the installation convenience of the product are improved.

The utility model discloses a spiral milling cutter polishing device which comprises a polishing body, the front face of the polishing body is fixedly connected with an adjusting mechanism, the top of the polishing body is provided with a moving groove and an adjusting groove, the top of the polishing body is movably connected with a moving frame through the moving groove, and one side of the moving frame is fixedly connected with a rotating motor. A mounting assembly is fixedly connected to the driving end of the rotating motor, an adjusting seat is movably connected to the top of the grinding body through an adjusting groove, a grinding motor is fixedly connected to one side of the adjusting seat, a grinding wheel is fixedly connected to the driving end of the grinding motor, and a moving mechanism is fixedly connected to the interior of the grinding body; and through the arrangement of the moving frame, the rotating motor and the adjusting base, the precision of grinding the spiral milling cutter is improved, the situation that a blade of the spiral milling cutter is excessively ground or ground obliquely in the grinding process is avoided, and therefore the grinding effect is enhanced.

The utility model relates to the technical field of gear transmission, and discloses a powder metallurgy crankshaft timing gear which comprises a gear shaft outer frame and a gear transmission mechanism, the inner wall of the gear shaft outer frame is sleeved with a gear column, the outer wall of the gear column is fixedly connected with an upper transmission gear shaft, the outer wall of the gear column is fixedly connected with a first limiting ring, and the outer wall of the gear column is fixedly connected with a second limiting ring. A second limiting ring is fixedly connected to the outer wall of the tooth column, a lower transmission gear shaft is fixedly connected to the side, away from the upper transmission gear shaft, of the tooth column, tooth grooves are formed in the outer wall of the lower transmission gear shaft, and the tooth grooves are distributed in the outer wall of the lower transmission gear shaft in a circumferential array mode. According to the powder metallurgy crankshaft timing gear, the first connecting ring and the second connecting ring are symmetrically arranged on the inner wall of the lining body, so that when equipment works, the first limiting ring and the second limiting ring can be limited, the situation that the first limiting ring and the second limiting ring are polished in the equipment can be effectively avoided, and noise generated when the equipment works can be effectively reduced.