339results about How to "Blowout prevention" patented technology

The invention relates to a method for producing phosgene through the reaction of chlorine and carbon monoxide, and in particular to a method that chlorine and carbon monoxide are used to perform an exothermic reaction in a tube reactor in the presence of an activated carbon catalyst and generate phosgene. In the method provided by the invention, after chlorine is mixed with excess carbon monoxidein a mixer M1, then the mixture enters a tubular reactor C1 to react under the action of the activated carbon catalyst and generate phosgene and then passes through a protection reactor C2 to ensure that chlorine reacts completely; and the heat generated by the reaction is led out by a 60 DEG C cooling water system in closed cycle, the generated gaseous phosgene is cooled through W1 condensation and W2 condensation and enters a phosgene gas-liquid separation tank B2, the un-condensed gas enters an exhaust gas absorber K1, and -5 DEG C toluene is used to absorb and recycle phosgene in tail gas.

A method for reducing stand-off effects of a downhole tool includes disposing the downhole tool in a borehole, wherein the downhole tool comprises at least one moveable section disposed between an energy source and a receiver on the downhole tool; and activating the at least one moveable section to reduce a thickness of at least one selected from a mud layer and a mudcake between the downhole tool and a wall of the borehole. A downhole tool includes an energy source and a receiver disposed on the downhole tool; at least one moveable section disposed between the energy source and the receiver; and an activation mechanism for reducing a thickness of at least one selected from a mud layer and a mudcake between the downhole tool and a wall of a borehole.

The invention provides a laser drill, a laser drilling tool and a well drilling rock breaking method. The laser drill comprises a drill body (3); a camera (8) and a plurality of laser heads (1) are contained in the drill body (3); an adjusting bracket (7) capable of moving the camera (8) and/or the laser heads (1) is also contained in the drill body (3); through holes corresponding to the camera (8) and the laser heads (1) are formed in the head part of the drill body (3). The laser drilling tool containing the laser drill is provided with an underground night vision system and an aboveground control system; by the drilling rock breaking method, the problems that the hard rock stratum drilling and production efficiency is low, real-time observation cannot be performed underground, and the like are solved, the rock breaking efficiency is greatly increased, the loss of the drilling tool is reduced, and the cost is reduced.

The invention relates to petroleum machinery, particularly to an oil pipe plugging device for plugging the inner hole of an oil pipe positioned below underground small-hole equipment, which comprises a core bar (1), wherein a clamping claw assembly (4), an upper slip guide taper sleeve (5), a middle connecting sleeve (6), a lower slip guide taper sleeve (7), a lower connecting sleeve (8), a jacket assembly (9) and a plug assembly (10) are sleeved on the core bar (1); and an upper slip assembly (11), an upper pressure spring (12), a lower pressure spring (13) and a lower slip assembly (14) are sleeved on the middle connecting sleeve (6). The oil pipe plugging device can be used for plugging a large-inside-diameter oil pipe positioned below thereof through the small hole of underground pipe column tools, such as a water distributor and the like, has the advantages of firm fixation in the oil pipe and high plugging reliability, can also be used for reliably plugging the underground oil pipe to prevent blowout from occurring, and ensures the normal water-well major repair operation, thereby playing roles of environmental protection and safe production, being high in use safety and more convenient to use and more beneficial to the safety of oilfield production.

The invention relates to a well blowout preventer mounted in a drilling column and automatically controlled in a well, which is capable of automatically closing the well during the well kick or the well blowout of oil-gas fields in the process of drilling the well. The invention is capable of automatically controlling the well blowout and also unlocking the blowout preventer in time so as to ensure the continuousness, safety and reliability in the process of drilling the well. The technical scheme is: a drilling tool slide valve assembly comprises a slide valve joint, a slide valve body and a slide valve seat, one end is connected to the drilling column and the other end is connected with a well blowout preventer main body. One end of the collar of the well blowout preventer main body is connected with the slide valve joint and a central tube, the collar thereon is provided with two stepped annular grooves, a clamp spring is mounted on a piston and in contact with the inner wall of the collar, a clamp pin and a clamp pin spring are mounted in the flute of the central tube, a slip ring sealing ring is mounted in the flute of the inner wall of a slip ring, a protrusion-preventing ring is mounted at the junction of a rubber barrel and the slip ring, one end of a support ring is connected with the valve body, the other end thereof is connected with the rubber barrel and the protrusion-preventing ring to form a blowout-preventing sealing device. The invention has simple structure, reliably works, is capable of effectively preventing the well blowout, and improves technical benefit and economical benefit.

The invention discloses a device for drilling minimal borehole on one coiled tubing side with ultra-short radius, which comprises a guider, a flexible transmission shaft, a driving motor and a bit. The flexible transmission shaft is arranged inside the guider, the bit is arranged at the output end of the flexible transmission shaft, and the driving motor is arranged at the input end of the flexible transmission shaft. The flexible transmission shaft includes more than three transmission sections which are connected with each other through ball heads, and the transmission sections are in surface contact with the ball heads. The invention increases the axial area of the flexible transmission shaft by using the ball heads to connect the transmission sections of the flexible transmission shaft and designing the surface contact between the transmission sections and the ball heads, thus prolonging the service time of the flexible transmission shaft and improving the device stability.

The invention provides a multi-online indoor unit turning-off control method and a multi-online device and relates to the technical field of air-conditioners. The multi-online indoor unit turning-offcontrol method comprises the steps that an indoor unit turning-off instruction is received; multi-online operation parameters are detected; and according to the multi-online operation parameters, thefan rotating speed of an indoor unit to be turned off, the expansion valve opening degree of the indoor unit and compressor frequency of an outdoor unit are reduced synchronously and gradually. According to the multi-online indoor unit turning-off control method, while the fan rotating speed of the indoor unit to be turned off is reduced, the expansion valve opening degree of the indoor unit to beturned off is reduced synchronously, the frequency of a compressor of the outdoor unit is reduced synchronously, therefore before the wind output temperature of the indoor unit fluctuates, an expansion valve of the indoor unit to be turned off and the compressor of the outdoor unit are adjusted in an adaptation manner in advance, it is ensured that the wind output temperature of the indoor unit to be turned off keeps constant, the situation that in the turning off process of some multi-online indoor units blow out cold wind is avoided, and the experience degree of users is improved.

The invention relates to a self-propelled complex-finger type cotton picker, belonging to the technical field of agricultural machinery. The self-propelled complex-finger type cotton picker comprises a cotton boll picking platform, a wind power conveying device, a cotton boll separating device, an impurity removing device and a cotton boll collecting box; the cotton boll picking platform is provided with a cotton boll picking finger rod row and a seed cotton delivery outlet; the delivery inlet of the wind power conveying device is in butt joint with the seed cotton delivery outlet of the cotton boll picking platform and is connected with the inlet of the cotton boll separating device; the outlet of the cotton boll separating device is connected with the cotton boll collecting box through the impurity removing device; the cotton boll separating device comprises a separating box; a spike roller is arranged above the bottom of a hopper of the separating box; a direct-current channel is formed above the spike roller; the joint of the inlet of the cotton boll separating device and the hopper is provided with a cotton pressing brush; a grille plate which extends to the outlet of the cotton boll separating device is arranged below the spike roller; and the bottom of the hopper is provided with the cotton boll collecting box through a wind closing device. The self-propelled complex-finger type cotton picker effectively overcomes the defects of non-thorough cotton boll separating and easy blocking, prevents the cotton boll from entering the impurity removing device to cause cotton dying and damping, reduces the impurity rate of the picked cotton and is beneficial to improving the grade of the cotton.

The invention provides inner blowout prevention double floating valves of a double-wall drill pipe. The inner blowout prevention double floating valves comprise an upper valve seat, a lower valve seat and a floating valve core which is arranged between the upper valve seat and the lower valve seat in a coaxial and sliding mode; axial through holes are formed in the center of the upper valve seat and the center of the lower valve seat in a communicated mode respectively; the floating valve core comprises an outer layer positioning sleeve which is arranged on the outer wall of the upper valve seat and the lower valve seat in a coaxial, sealing and sliding mode; a separation plate is horizontally arranged inside the outer layer positioning sleeve in a sealing mode; the center of the separation plate protrudes upward to form a cylindrical plug; a plurality of through holes are annularly formed in the separation plate and surround the cylindrical plug; an elastic element is located on the outer side of the cylindrical plug and arranged between the upper valve seat and the separation plate; a valve sleeve is arranged on the outer side of the upper valve seat, the lower valve seat and the floating valve core in a coaxial mode; a gap formed between the valve sleeve and the outer side of the upper valve seat, the lower valve seat and the floating valve core forms an annular overflow channel. When a blowout is produced in the drilling process, the inner blowout prevention double floating valves can be automatically closed so as to simultaneously close a double-wall drill pipe center drilling fluid overflow channel and an annular space drilling fluid overflow channel formed between an inner pipe and an outer pipe of the double-wall drill pipe and accordingly a blowout and well kick accident is effectively prevented.

The invention relates to a gradually-expanding premixing porous medium combustor for combusting biomass gasification gas. The combustor is provided with gradually-expanding pipes, wherein a porous medium with catalytic action is filled in each gradually-expanding pipe; a heater is coated outside each gradually-expanding pipe; each gradually-expanding pipe is wholly embedded into a thermal insulating layer; a capacity expansion chamber is formed at an inlet of each gradually-expanding pipe; a tempering prevention piece and a flow equalization plate are arranged in each capacity expansion chamber; and an inlet of each capacity expansion chamber is connected with a premixing tube. Flame deflection and other unstable combustion phenomena can be avoided, flames can be effectively prevented from being blown out of the combustor, the power of the combustor is improved, the working range of the combustor is expanded, and the load and working condition changes of the combustor are met. Moreover, the combustor has a function of adjusting gas flow, and parallel gradually-expanding pipes are prevented from being shut down due to over-low load or prevented from being subjected to over-high load; and the biomass gasification gas can be subjected to super adiabatic combustion in the combustor, the lean flammability limit of fuel is greatly expanded, and the fuel with ultralow heat value can be stably combusted. Meanwhile, the flame area is widened, the combustor contributes to accelerating cracking combustion of tar, and the combustion efficiency is improved.

The invention relates to a dust box cleaning control method of a sweeping robot and a device and a storage medium, the sweeping robot is in butt joint with a maintenance station, the maintenance station is provided with a first draught fan, and the method comprises the steps that the sweeping robot is in butt joint with the maintenance station for charging; a second draught fan is started firstly,and then the first draught fan is started to conduct dust suction on the sweeping robot; or the first draught fan and the second draught fan are started at the same time; when dust extraction is finished, the first draught fan is closed firstly, and then the second draught fan is closed; or the first draught fan and the second draught fan are closed at the same time. According to the dust box cleaning control method, work of the second fan can be maintained in the dust extraction process, the interior of the dust box is kept in a negative pressure state, and then dust is prevented from beingblown out from the dust inlet of the sweeping robot in the dust extraction process.

The invention discloses an air blowing device. The air blowing device comprises a main machine shell, a motor, a fan, a switch and an air blowing pipe, wherein the motor is arranged in the main machine shell, the fan is driven to rotate by the motor, the switch controls the motor to be opened and closed, the air blowing pipe is connected with the main machine shell, the air blowing pipe comprises an air inlet end close to the fan and an air outlet end far away from the fan, and the inner wall of the air blowing pipe is provided with at least two spiral curved surfaces which stretch from the air inlet end to the air outlet end and are mutually wound. Airflow in the air blowing pipe can be effectively guided by the spiral curved surfaces, the airflow is enabled to do regular rotating flow, thus the airflow blown out from the air outlet end can be stable and uniform, a blowout phenomenon is avoided, and the effect of blowing branches and leaves is improved; in addition, the inherent frequency of the air blowing pipe is increased by a spiral structure, the excitation frequency of the airflow is avoided, thus the possibility of generating resonance is removed, the holding comfortable degree of a user is improved, and the utilization rate of the air blowing device is increased.

The invention relates to a thorax airbag device without housing which is mounted between a guide yoke and a tearing thread. The invention also relates to a seat which is provided with a thorax airbag device without housing which is mounted by a guide yoke and a tearing thread.

The invention discloses a manufacturing method of PCB back drill hole, which comprises the following steps: laminating, drilling through holes, chemical copper precipitation, electroplating copper, whole plate tin plating, drilling back drilling, tin removing, pre-drying plate, resin plug hole, drying plate and grinding plate; Wherein the back drill hole is a back drill hole having a special structure, wherein the depth ratio of the back drill hole depth to the through hole depth is greater than or equal to 1, and the depth of the back drill hole is greater than or equal to 0.5 mm; The pre-drying plate retains the residual temperature of the plate surface, and the residual temperature is higher than the ambient temperature for resin plug holes; The resin plug hole is plugged in such a waythat resin ink flows into the back hole from the through hole of the plate, and the whole back hole and the through hole are filled. The invention increases the plumpness of the plug hole of the backhole with the special structure, and improves the uniformity and reliability of the plug hole of the back hole with the special structure.

The invention discloses a sediment repair aeration device for intensifying controlled release of endogenous nutrients. The sediment repair aeration device comprises an air-deflector, a submerged pump arranged inside the air-deflector, a venturi tube, an air suction pipe and at least two gas-water drainage pipes, and a control cabinet arranged outside the air-deflector, wherein one end of the venturi tube is communicated with the submerged pump; the venturi tube is communicated with the venturi tube, and extends upwards to outside of the air-deflector; the gas-water drainage pipes are communicated with the other end of the venturi tube; the gas-water drainage pipes are symmetrically arranged at the other end of the venturi tube, and stretch towards two sides to form a wing structure; the control cabinet is connected with the submerged pump through a cable. The invention also discloses an aeration method, the aeration process can be optimized and controlled according to the hydrodynamic characteristic and the dynamic change, the dissolved oxygen level and reasonable distribution of the hypoxic microenvironment in the system are facilitated, and effective controlled release of the endogenous nutrients is achieved.

A motorcycle including a frame having a backbone and engine carrier prevents the need for front support bars. The power plant is secured to the backbone and engine carrier and may be quickly removed. The power plant turns a hydraulic pump that transfers power to a hydraulic motor via hydraulic fluid. A reservoir of hydraulic fluid is preferably contained in the backbone. The hydraulic motor is contained in a swing arm and connects to one side of the rear wheel. The hydraulic motor acts as both a drive unit and a braking unit. Lights may be secured to the engine carrier to provide a better view of the road.

The invention relates to an electric refrigerator comprising a body provided with an inner receiving compartment, a door that is connected to the body in a mobile manner and is used to close the inner receiving compartment, and an air channel system applied to the heat insulation rear wall. Said air channel system comprises a covering plate provided with air outlets, an evaporator arranged between the air channel covering plate and the heat insulation rear wall, and a ventilator. The ventilator is applied horizontally above the evaporator, the air outlets are applied obliquely to the air channel covering plate, and the air flow generated by the ventilator is blown obliquely at an angle to the air channel covering plate, upwards or downwards in the inner receiving compartment.

The invention provides a manual wedge-shaped throttle valve, belongs to the field of oil well pressure control and aims to enhance the transverse force bearing capacity of a valve core and increase the safety coefficient of the throttle valve. The technical scheme includes that the manual wedge-shaped throttle valve comprises a valve seat, a valve core and a shell, the valve core is a cylinder with one side edge clinging to the inner wall of the valve seat, and flow guide buffer surfaces are arranged on the front section of the valve core. Since one side of the valve core clings to the inner wall of the valve seat, the valve core cannot vibrate after being impacted by fluid, the transverse force of the fluid on the valve core is reduced by the aid of the flow guide surfaces, possibility of breakage of the valve core is greatly decreased, oil well blowout is avoided, and safety of oil well operation is improved; by the aid of a concave cambered surface arranged between the inclined flow guide surface and the axial flow guide surface, anti-erosion capability of the valve core is enhanced, and service life of the valve core is prolonged.