4047 results about "Bushing" patented technology

The anti-flashover ring of the present invention includes a substantially cylindrical body having an outer surface with a plurality of passageways thereon. Each of the passageways pass from one of the sidewalls through the body to the other of the sidewalls of the ring. The passageways function to provide fluid communication between the atmosphere surrounding an accessory product such as a bushing insert and the interior of a connector mounted thereon when the connector is being pulled off the bushing insert. The fluid communication prevents a vacuum from forming between the connector and the bushing insert that can lead to a flashover between an electrical probe in the connector and a ground shield of the bushing insert. The anti-flashover ring is also configured to provide an indication to the operator installing the connector of when the connector is fully installed on the bushing insert. Such indication is provided by providing the ring with a width that is equal to length of the lip of the connector when the connector is fully installed. As such, the operator installing the connector continues to push on the connector until the end of the lip aligns with the end of the ring.

Apparatus of components and methods for connecting and sealing a pothead to an electrical cable used in an oil well environment, are provided. Electrical leads are anchored in insulating members retained within the pothead. The leads inserted into passages formed through the insulating members each having an elliptically shaped portion. Channels are formed along the surface of the passages and along the circumference of the elliptically shaped portions. Boot seals are provided in the elliptically shaped portions and circumscribe the electrical leads. A hydrocarbon-based liquid is applied to the boot seals to cause them to swell and occupy the space between the leads and the insulators, including the channels.

The invention relates to a method and device for preparing a silicon steel sheet in a static magnetic field with a powder sintering method. The specific process of the method consists of the following steps of: mixing Fe-Si powder; rolling into a plate blank; and sintering a Fe-6.5 weight percent Si green compact in a static magnetic field. In the method, 6.5 percent by weight of Si high-silicon steel with high density is obtained by using the influence of the magnetic field on the sintering densification and orientation process of a Fe-6.5 weight percent Si powder green compact, and an easily-magnetized axis is oriented along the magnetic field. An atmosphere/vacuum sintering device in a static magnetic field consists of a temperature control device, an exhaust pipe, a thermocouple, a heating element, a corundum crucible, a refractory fiber, a support block, a heat insulating block, a water-cooled bush, a static magnetic field generating device, a sealed corundum pipe, an inert gas inlet valve, a vacuum pumping valve, a Fe-6.5weight percent Si green compact, a thin corundum plate interlayer and a fixing molybdenum wire. The 6.5 percent Si silicon steel sheet prepared with the method has the advantages of near net molding, superior magnetic property, high orientation degree and the like, and has a remarkable industrial application prospect.

The invention discloses a hot extrusion forming process of half-shaft casings, comprising the following steps: 1) selecting proper round steel according to design products and heating the round steel to 1100-1250 DEG C, 2) carrying out forward extrusion and upsetting, 3) carrying out backward extrusion and positioning, 4) carrying out shallow punching and performing, and 5) carrying out deep punching, finish forging and forming. The invention also discloses a special device for implementing the hot extrusion forming process, comprising upsetting tools, positioning tools, tools for shallow punching and performing and tools for deep punching, finish forging and forming, which are arranged from left to right in sequence. The process has four stations. Each station has enough cooling and lubricating time. Not only can the special device not be deformed after long-term use and the workpieces can not have the problem that inner hole inclination leads to inner and outer coaxiality difference, but also the special device is protected to reduce damage while the capacity is increased.

The invention relates to a steel used for straight seam electric resistance welding petroleum casing and a casing manufacturing method, which is applied to a straight seam electric resistance welding petroleum casing used for an oil and gas well in petroleum and gas industry. The steel used for the straight seam electric resistance welding petroleum casing comprises the following components in percentage by mass: 0.15-0.28% of C, 1.0-1.6% of Mn, 0.2-0.4% of Si, 0. 02-0.06% of Al, less than or equal to 0.01% of P, less than or equal to 0.005% of S, less than or equal to 0.008% of N, 0.001-0.005% of Ca and the balance of Fe. The preparation method comprises the steps of: preparing hot-rolled plate coils, producing straight seam electric resistance welding steel pipes by the hot-rolled plate coils, carrying out welding seam normalization or overall normalization on the welded steel pipes, straightening and cutting the normalized or tempered welded steel pipes into pipe segments with the length of 10-12m, and processing API standard screw threads. The invention has the advantages that the steel has good strength and toughness, the welding seam has no defect, and the properties of the steel are uniform with those of mother material. The yield strength is greater than or equal to 380-760MPa, the tensile strength is greater than or equal to 520-865MPa, the elongation is greater than or equal to 20%, and the impact energy of a room-temperature transverse full-size V-shaped notch is greater than or equal to 40J.

An external structure of an outdoor electronic apparatus for packaging a circuit board having a power line is provided. The external structure includes a housing having an opening and a waterproof gasket. The waterproof gasket includes a main body, a platform portion, a first protrusion, and a bushing portion. The main body covers the opening. The platform portion, located at the inner side of the main body, extends into the housing from the opening. The platform portion seals the opening and tightly fits with the housing. The first protrusion is located on the platform portion for abutting against the circuit board. The bushing portion, located at the outer side of the main body, has a channel. The channel passes through the main body and the platform portion and can be passed through by the power line. The bushing portion and the power line tightly fit to each other.

The inventive method consists in: modeling for thermal analysis of heating and temperature rise of the main shaft, using a cylindrical-coordinate system for the temperature distribution of the axially symmetric structure and determining the boundary condition; calculating friction heat and power loss of front and back bearings of main shaft in a state of different speeds and different pretightening forces; determining the relation of axial shifting of the bearing with the pretightening forces; according to the above calculated data, choosing material for making double-layer bushing and making length different double-layer bushing size of the sleeve because the extension volume of the bushing heat expansion depends on the length of the sleeve.

The invention provides a ultra-high temperature superconductive cable insulation electric character tester, comprising a low temperature pressure thermal insulation controller provided with a cover board, a hole at the center of the cover board, an insulation sleeve penetrating through the hole, a vacuum connector mounted on the cover board, a connecting tube for filling liquid nitrogen and a connecting tube for adding pressure which are mounted on the cover board, a test electrode in the low temperature pressure insulation container, and a conductive bar in the insulation sleeve, of which the upper end is connected with high voltage and the lower end is connected with the high voltage end of the test electrode. The ultra-high temperature superconductive cable insulation electric character tester can improve the electric property of the insulation material of a high temperature superconductive cable, under low temperature liquid nitrogen temperature, having simple operation.

The invention discloses a thermocouple insulation locator, a mounting method of the locator and a wall temperature measuring device. The thermocouple insulation locator comprises a self-tightness locating bolt fixed to a thermal coupler, a locating nut connected to the self-tightness locating bolt, a first insulation casing pipe, a second insulation casing pipe, a locating guide pipe and a pushing and pressing nut, wherein the first insulation casing pipe and the second insulation casing pipe are arranged on the two sides of the self-tightness locating bolt and are arranged on the thermal coupler in a sleeved mode, the first insulation casing pipe is sleeved with the locating guide pipe, and the pushing and pressing nut is arranged on the second insulation casing pipe in a sleeved mode and is in threaded connection with the rear end of the locating guide pipe. An end cover is arranged at the rear end of the pushing and pressing nut, and insulation blocking pieces are arranged between the self-tightness locating bolt and the two insulation casing pipes, a pushing and pressing spring is arranged between the insulation blocking piece at the rear end of the self-tightness locating bolt and the end cover arranged at the rear end of the self-tightness locating bolt in a sleeved mode, and the second insulation casing pipe is sleeved with the pushing and pressing spring. According to the thermocouple insulation locator, the thermal coupler can be precisely located to the measuring point, it is ensured that the thermal coupler is insulated from other components except a measured device, and small vibration and migration of the measured device in the channel direction of the thermal coupler can be borne.

The invention discloses a bidirectional drawing force detector for a precise bushing and a test method of the detector. The drawing force detector includes a pedestal, a slide rail arranged on the pedestal, a double-end leading screw, left and right sliding tables mounted on the leading screw, a stepping motor arranged at one end part of the leading screw, a clamp supporting seat arranged in a middle part of the pedestal, and a clamp arranged on the clamp supporting seat and used for fixing a ceramic bushing sample, the left and right sliding tables are fixedly equipped with two oppositely arranged detection heads, each detection head comprises a detection insertion core, a connecting part and a force sensor, the stepping motor can drive the double-end leading screw and drive the detection heads on the left and right sliding tables to perform centering insertion and pulling drawing force detection movement on the ceramic bushing workpiece on the clamp. The equipment is high in precision and small in vibration, a return reset limit switch of the stepping motor is arranged, deviation of the detection heads on the sliding tables in reciprocating motion is reduced, test precision of the drawing force detector is improved, and the drawing force detector can serve as an instrument for calibration of an automatic detection machine.

This disclosure describes a device and method of sealing perforations on a well casing inside a subterranean well. The device comprises a generally cylindrical sleeve having a open top and a closed bottom; a heater located inside the sleeve, the heater comprising a thermite mixture; an ignition mechanism that ignites the thermite mixture upon actuation; and a string connected to the heater ignition and detachably engages the sleeve. The method comprises lowering a body of meltable plugging material into the well casing near the perforations; lowering the plugging device into the well casing immediately on top of the body of meltable plugging material; melting the meltable plugging material by igniting the thermite thereby transferring heat to the body of meltable plugging material; forcing the molten plugging material into the perforations by pushing the plugging tool further downhole; cooling the plugging tool and the plugging material until the plugging material solidifies; disengaging the tubing string from the sleeve and retrieving the tubing string with the heater; and removing the sleeve and bismuth remaining in the well casing, but not in the perforations.

The invention discloses steel for an expandable casing for an oil well and a manufacturing method thereof, and the manufacturing method is applied to preparing the expandable casing for the oil well for petroleum and gas industrial oil. The steel alloy material of the expandable casing for the oil well comprises the following components in percentage by weight: 0.08 to 0.2 percent of C, 1 to 2 percent of Mn, 0.15 to 0.35 percent of Si, 0.02 to 0.06 percent of Al, less than or equal to 0.01 percent of P, less than or equal to 0.05 percent of S, less than or equal to 0.08 percent of N, 0.001 to 0.005 percent of Ca, and the balance of Fe. The method for preparing the expandable casing for the oil well comprises the following steps of: preparing hot rolled steel coils; producing straight seam resistance welded steel pipes by using the hot rolled steel coils; normalizing welding lines after welding; and finally, cutting into welded steel pipes, and machining API standard threads or special threads at two ends of each welded steel pipe by using a numerical control machine. The steel for the expandable casing for the oil well has the advantages of excellent comprehensive performance such as expansion deformation capacity, intensity, toughness, and the like, no defect of the welding lines and uniform and consistent performance with base metals.

An on-line diagnostic method for health monitoring of a transformer. In the case of a single phase or three phase star connected transformer deformations in the winding are determined by

representing the transformer winding as a lumped parameter circuit and dividing the winding into at least two sections. A first set of fingerprint values are generated to determine the location of the deformed section of the winding and the type of deformation. A second set of finger print values are generated to determine the extent of deformation of the deformed section. The location and extent of radial or axial deformation or combination of both radial and axial deformation in the winding are then determined. The change in the capacitance of the bushing of the transformer connected at the line end of the winding is also determined. The state of the insulation system of the transformer is determined by detecting partial discharge pulses in the transformer winding. The change in the dielectric characteristics of the insulation system of the transformer is detected on the basis of phase angle difference.

The invention relates to a hot-rolled coil plate for an oil casing and a manufacturing method thereof. The hot-rolled coil plate comprise, by mass percent, 0.10 to 0.21 of C, 0.10 to 0.25 of Si, 1.0 to 1.50 of Mi, 0.010 to 0.020 of Al, less than or equal to 0.020 of P, no more than 0.010 of S, 0,012 to 0.045 of Nb, 0.005 to 0.020 of Ti, and the balance Fe and inevitable impurities. The tensile strength Rm is more than or equal to 655Mpa, the yield strength Rt 0.5 is 379-552Mpa, the elongation A50% is more than or equal to 24, and the hardness HV10 is less or equal to 248. The manufacturing method includes:LF refining, the S being less than or equal to 0.004%; RH refining, subjecting the molten steel to Ca treatment; slab continuous casting, the temperature being in a range from 1527 DEG C to 1547 DEG C, and the casting speed being less than or equal to 1.2m/min; slab heating, the temperature being in a range from 1150 DEG C to 1230 DEG C; roughing mill group rolling, the final temperature being in a range from 750 DEG C to 920 DEG C; laminar cooling; and coiling. The hot-rolled coil plate for the oil casing has low yield ratio and good welding performances, and no subsequent thermal treatment is needed.

The invention pertains to a rotary feed-through for supplying a fluid to a rotating machine part with a hollow shaft (3) that is rotatably supported in a housing (1, 2) and has a first sliding surface (29), with a sealing bushing (31) that is arranged in a rotationally fixed fashion within the housing (1, 2) coaxial to the shaft (3) and has a second sliding surface (30) for contacting the first sliding surface (29), and with a collecting chamber (27) that is arranged within the housing (1, 2) and serves for collecting the leakage fluid escaping between the two sliding surfaces (29, 30). The leakage fluid collected within the rotary feed-through can be monitored with the aid of a detection channel (26, 33, 34, 37, 39, 47) in the housing (1, 2) that is connected to the collecting chamber (27) and contains a leakage sensor (41).

The invention relates to an underground temperature measurement system. The system comprises a thermocouple, a compensating lead and a heavy hammer, wherein the compensating lead is positioned above the thermocouple, and the lower end of the compensating lead is connected with the upper end of the thermocouple; the heavy hammer is positioned below the thermocouple, connected with the lower end of the thermocouple and used for guiding the thermocouple to advance in a temperature measurement passage; and the thermocouple is a sheathed thermocouple manufactured by combined assembly of a thermocouple wire, an insulating material and a metal protective sleeve and stretching, and the length of the sheathed thermocouple corresponds to the thickness of a highest temperature interval in an underground high temperature layer to be measured. The temperature measurement system can greatly reduce the manufacturing cost of the thermocouple, effectively prolong the service life of the thermocouple and improve the automation degree of temperature measurement, and is convenient for repair and maintenance of the system per se.

The invention provides a method for improving transverse impact toughness of a seamless steel tube, which comprises the following steps: smelting and continuously casting a tube blank; perforating and carrying out tandem rolling on the steel tube; and carrying out heat treating, so that the mechanical properties of a petroleum casing tube achieve the following requirements: the yield strength and tensile strength meet the standard requirements of API SPEC 5CT, the impact toughness meets the standard requirements of API SPEC 5CT, and simultaneously the ratio of the transverse full-size Charpy impact work to the longitudinal full-size Charpy impact work is controlled at 0.75-0.90. The invention has the effects that when the rolling ratio of the method is controlled at 12.8%-26%, the ratio of the transverse full-size Charpy impact work to the longitudinal full-size Charpy impact work of the steel tube is controlled at 0.75-0.90, and when the rolling ratio of the steel tube production is reduced to 15.9%, the ratio of the transverse impact to the longitudinal impact is increased to 0.89, and the transverse impact work is increased to 55J.

The invention relates to an insulator with a temperature monitoring function and aims at providing an insulator which is simple in structure, reliable in performance, convenient to manufacture and low in manufacture cost and has the temperature monitoring function. The technical scheme is that the insulator with the temperature monitoring function is provided with an insulator and an electric conduction metal strip arranged on the insulator and electrically connected with a device, and the temperature of the device needs to be measured. The insulator is characterized in that a heat conductinginsulation strip embedded inside the insulator is connected with the other end of the electric conduction strip, a temperature measuring device is arranged at a non-electric end of the heat conducting insulation strip, and the temperature measuring device is led to the outside of the insulator through a temperature measuring line at the non-electric end. The insulator is applicable to electric equipment with insulators or insulation sleeves in the electric engineering field.

The invention discloses a floor type indoor ceiling concrete slab bottom drilling mechanism which belongs to the technical field of building indoor decoration construction instruments and comprising a supporting pipe, a pressure lever handle, an outer sleeve, a grip type power supply switch, an inner sleeve, a puncher bracket and a puncher, wherein the bottom of the supporting pipe is provided with a stabilizing plate; the pressure lever handle is connected to the supporting pipe; the upper part of the outer sleeve is provided with one group of outer sleeve regulating holes, the lower part ofthe outer sleeve is matched with the outer wall of the supporting pipe, the outer sleeve moves up and down when being adhered on the outer wall of the supporting pipe, the lower end part of the outersleeve is hinged with the pressure lever handle; the grip type power supply switch is fixed on the supporting pipe; the inner sleeve is accommodated in an outer sleeve cavity of the outer sleeve, theinner sleeve is provided with one group of inner sleeve regulating holes, when the inner sleeve regulating holes and the outer sleeve regulating holes are mutually coincided, the inner sleeve and theouter sleeve are locked by using an inner sleeve locking member; the puncher bracket is arranged at the top end part of the inner sleeve; and the puncher is fixed on the puncher bracket and is in electrical control connection with the grip type power supply switch. The floor type indoor ceiling concrete slab bottom drilling mechanism has the advantages of ensuring stability, having safety and light integral weight, being capable of adapting to different spatial heights and being convenient for movement.

A cable management system has a chassis, a communications interface and an access panel assembly. The cable management system a chassis which is configured to hold a set of circuit boards. The communications interface is disposed adjacent a side of the chassis. The access panel assembly is coupled to the side of the chassis and is disposed adjacent the communications interface. The access panel assembly includes (i) a frame portion which defines a frame opening, (ii) a set of bushings coupled to the frame portion, the set of bushings defining a set of cable ports and an access port within the frame opening defined by the frame portion, and (iii) a cover portion which is configured to substantially cover the access port defined by the set of bushings.

The invention relates to Ni-based corrosion resistant alloy for a high-acidity oil-gas field and a manufacturing method of an oil casing of the Ni-based corrosion resistant alloy for the high-acidity oil-gas field. The Ni-based corrosion resistant alloy comprises the following chemical components by weight percent: smaller than or equal to 0.03% of C, 21.0-24.0% of Cr, 18.0-20.0% of Fe, 7.0-9.0% of Mo, 1.5-2.0% of Cu, smaller than or equal to 3.0% of Co, smaller than or equal to 3.0% of W, smaller than or equal to 0.50% of Nb and Ta, smaller than or equal to 0.50% of Ti, smaller than or equal to 0.5% of Si, smaller than or equal to 0.5% of Mn, smaller than or equal to 0.003% of S, smaller than or equal to 0.005% of P, and smaller than or equal to 0.012% of N, wherein the total amount of (Mo+0.5*W) is 7.0-10.0%, and the numerical value of (Ti/6+(Nb+Ta)/8)/(C+N) is greater than or equal to 1 and smaller than or equal to 2. The manufacturing method comprises the following steps: I smelting, to be specific, smelting electroslag refining ingots; II tube blank processing; III tube making including hot-extrusion, reaming and solution treatment, wherein the grain size of a crude tube is 4-7 grade, the hot-extruded crude pipe is cold-rolled into a finished seamless tube, the total cold-rolling pass deformation amount is 30-61%, the cold-rolling speed is 25-35 times/min. The Ni-based corrosion resistant alloy and the oil casing manufactured are excellent in corrosion resistance.