756 results about "Tripping" patented technology

The invention belongs to the technical field of power system power distribution network relay protection, and provides an active fault property discrimination method based on injection disturbance current response characteristics, which comprises the following steps: step 1, when an inter-phase fault occurs in a system, three-phase tripping of a fault line outlet circuit breaker occurs, and according to three-phase current and voltage change conditions before and after the fault, determining whether the fault occurs or not; determining two phases with increased line current and reduced voltage as fault phases; 2, delaying for 200ms after the circuit breaker trips, and controlling the action of a split-phase switch; according to the method, disturbance current signals are injected through an external power supply, the disturbance signals have obvious difference in response characteristics during permanent faults and instantaneous faults, the reliability and superiority of the method under different working conditions are verified through simulation, the method makes up for the defects of an active injection type method during fault property recognition processing, and the method has the advantages of high reliability and high reliability. The method is not influenced by injection time and fault duration, fault property discrimination can be realized only through one-time injection, and the method is simple in operation, small in calculation amount and high in reliability.

The invention relates to a power transformer with an active anti-deflagration function and a monitoring method. The power transformer comprises a transformer oil tank, an ascending flanged base, a high-voltage bushing, a short-circuit copper sheet, a neutral point bushing, a high-frequency sensor and an ultrasonic sensor. The ascending flanged base and the neutral bushing are connected to the top of the transformer oil tank; one end of the high-voltage bushing is connected with the ascending flanged base through a bolt; two ends of the short-circuit copper sheet are respectively connected with two ends of any bolt; the neutral point bushing is grounded through a grounding wire; and the high-frequency sensor is respectively connected in series with the short-circuit copper sheet and the grounding wire. The ultrasonic sensors are arranged in the ascending flanged base and the transformer oil tank respectively, and the ultrasonic sensors in the transformer oil tank are distributed on the upper portion, the middle portion and the lower portion of the transformer oil tank. According to the power transformer, two kinds of partial discharge signals at different positions are collected, whether discharge occurs at different positions in the transformer or not is accurately judged in combination with a logic judgment method, the severity degree is judged, and therefore early warning or tripping instructions are accurately output at the initial stage of a fault to remove the fault, and operation safety is ensured.

The invention discloses a transformer protection method and device applied to an oiled paper capacitor type bushing, and relates to the technical field of electric power, and the method comprises the following steps: collecting pressure data and temperature data in the bushing in real time; performing fault analysis according to the pressure data and the temperature data to obtain a fault analysis result; the fault analysis result is that the equipment has a fault or does not have a fault; when the fault analysis result is that the equipment has a fault, a tripping signal is sent out; the tripping signal is used for controlling the transformer of the bushing to perform tripping operation. According to the application, whether the equipment has a fault is judged through the pressure data and the temperature data in the bushing acquired in real time, and the tripping signal is sent out when the equipment has the fault is analyzed, so that the transformer of the bushing is controlled to execute the tripping operation, further expansion of the fault is avoided, and the safety of the equipment and the safety of a related operating environment are guaranteed.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to an electrically-controlled reducing cutter, which has the technical scheme that the extension and retraction of the cutter are accurately controlled by a control base driving motor and an electromagnet, wherein the control base driving motor comprises an MCU (Microprogrammed Control Unit) and a wireless communication module; the control base can receive a ground instruction and transmit an underground working state signal back in real time; meanwhile, the ratchet mechanism is matched with the electromagnet to achieve extending and retracting of the cutter position, and the pawl is always in close contact with the ratchet wheel under the action of the spring. And the lower shell is in threaded connection with the guide shoe. The cutting knife is driven to rotate through the transmission shaft, the cutting knife is controlled to stretch out and retract through the intelligent electric control system, continuous cutting of casing pipes with different pipe diameters can be achieved, the tripping frequency is reduced, and the casing pipe cutting efficiency in the well abandoning operation process is greatly improved.

The invention discloses a circuit breaker integrated with an adjustable hydraulic release. The circuit breaker comprises a circuit breaker body, wherein the adjustable hydraulic release, a release transmission mechanism and a main contact system are arranged in the circuit breaker body. The adjustable hydraulic release comprises a release body and an intelligent control module; the tripper body is provided with an oil cup, an oil cup iron core capable of axially moving, a pole shoe, a first coil and an armature, and the armature is linked with the tripping transmission mechanism. When the first coil is electrified, a first electromagnetic force is generated to push the oil cup iron core to move towards the pole shoe and finally attract the armature to trigger a tripping action so as to break a circuit. The intelligent control module is located at the end of the oil cup and can generate second electromagnetic force in the same direction or reverse direction as the first electromagnetic force to act on the oil cup iron core, and rated current adjustment and overload protection adjustment are achieved. According to the design, the problem that the protection characteristic of a traditional hydraulic electromagnetic release is fixed is solved, the number of synthesized ampere turns is equivalently changed through controllable second electromagnetic force, the rated current is flexibly adjusted, and the requirements of different devices are met.

The invention provides a drill string vibration reduction method and device.The method comprises the steps that longitudinal vibration data and torsional vibration data of a target drill string when a vibration reduction tool is tripped into multiple positions are obtained, and the longitudinal vibration data comprise hook load, a mass matrix, a stiffness matrix, a structural damping matrix, a drilling fluid damping effect matrix, a speed vector and an acceleration vector; the torsional vibration data comprises a rotational acceleration vector, a rotational speed vector, a rotational inertia matrix, a torsional rigidity matrix, a torsional structure damping matrix and a torsional drilling fluid damping matrix; the vibration intensity of the whole well section is determined by applying the longitudinal vibration model, the torsional vibration model, the longitudinal vibration data and the torsional vibration data; and according to the vibration intensity of the whole well section, the optimal tripping-in position of the vibration reduction tool is selected from all the positions, the vibration reduction tool is tripped into the optimal tripping-in position, and the vibration reduction process of the target drill column is completed. The reliability of the tripping-in position of the vibration reduction tool can be improved, and then the vibration reduction effect of the drill column can be improved.

The utility model discloses a miniature circuit breaker which comprises a base, a handle, a tripping piece and a contact frame are arranged in the base, and the handle is in linkage connection with the contact frame and used for pushing the contact frame and the tripping piece to rotate and move. When closing is carried out, the handle is rotated, so that a locking holding point is formed between the handle and the contact frame; and the tripping piece is used for disassembling the locking holding point, so that the tripping piece and the contact frame are reset. By optimizing the structure of the tripping mechanism, parts such as a jump pin and a swing piece in the prior art are reduced, the actions that the jump pin pushes the tripping piece to move and the tripping piece and the swing piece move in a linkage mode are correspondingly reduced, the action process is simplified, the reliability during opening and closing movement is improved, the occupied space is small, parts needing to be assembled are reduced, and the cost is reduced. The assembly efficiency is improved, the production cost is reduced, the product is reliable and stable, the overall size is small, and the assembly efficiency is improved.

The invention belongs to the technical field of power equipment, and particularly relates to a mining high-voltage explosion-proof circuit breaker which comprises a shell, a mounting frame, an arc extinguishing assembly and a permanent magnet assembly. The rotating rod is rotationally connected to the mounting frame through a bearing; the hand separating mechanism is mounted at the rear end of the shell; the interlocking mechanism comprises interlocking parts arranged at the lower ends of the two sides of the shell, the interlocking parts are used for synchronously opening when the box door is opened, and the interlocking parts are further provided with positioning parts; and the auxiliary mechanism comprises linkage parts arranged at the upper ends of the two sides of the shell, and the two sides of the shell are further provided with a limiting part and an oil spraying part. Through multi-stage cooperation of permanent magnet driving, mechanical interlocking, emergency manual opening and an intelligent lubricating system, safe opening and closing, door opening forced outage, overhaul false closing prevention and long-term maintenance of key components of the mining high-voltage circuit breaker are achieved, and operation safety and equipment reliability in the explosion-proof environment are remarkably improved.

The present invention relates to an operating mechanism of a circuit breaker, comprising a handle, a lock latch, a trip latch rotationally arranged in a housing, a torsion spring arranged between the trip latch and the housing, and a contact support rotationally arranged in the housing, a spring arranged between the contact support and the housing, and a moving contact linked and matched with the contact support. The handle is connected to the lock latch by means of a connecting rod; one end of the lock latch is connected to the contact support by means of a U-shaped connecting rod; the other end of the lock latch is provided with a locking groove matched with the trip latch; the locking groove rotates along with the lock latch and can be fastened at one end of the trip latch, to lock the lock latch and the trip latch; and the other end of the trip latch is provided with a tripping part linked and matched with an electromagnetic trip unit and a bimetallic strip, wherein the electromagnetic trip unit and the bimetallic strip can respectively drive the tripping part to act to unlock the lock latch and the trip latch. The present invention has the advantages of simple structure, stable and reliable performance, convenient assembly, high opening and closing speed, and flexible operation.

The embodiment of the invention provides a real-time monitoring system and method for pulling a heavy slurry cap in a pressure-controlled drilling well tube, and is applied to the field of geological exploration and development. The method comprises a tripping overflow key parameter monitoring module, a shaft real-time calculation decision module and a shaft pressure intelligent control module. The tripping overflow key parameter monitoring module is used for obtaining state parameters of a target shaft in the heavy slurry cap tripping process and transmitting the state parameters to the shaft real-time calculation decision module. The shaft real-time calculation decision-making module is used for determining the shaft pressure and the slurry column change condition of the target shaft according to the state parameters; working condition adjusting parameters are determined according to the shaft pressure and the slurry column change condition; and the shaft pressure intelligent control module is used for adjusting the shaft pressure according to the working condition adjusting parameters. According to the system, accurate early warning of the overflow leakage condition in the tripping process of the heavy slurry cap is guaranteed, the control effect on the shaft pressure is improved, and actual production and application are facilitated.

The invention belongs to the technical field of petroleum engineering, and discloses an infinitely-segmented sand control and water control well completion process pipe column and method. The infinite segmented sand control and water control well completion process pipe column comprises a sand control top packer assembly, a plurality of segmented screen pipe assemblies and a float shoe assembly which are sequentially connected through blind pipes from top to bottom, each segmented screen pipe assembly comprises a shape memory packer and a water control screen pipe provided with a water control valve, and the shape memory packers and the water control screen pipes are connected through the blind pipes. An annular space between the infinite segmented sand control and water control well completion process pipe column and the well wall is filled with a water blocking proppant. According to the infinitely-segmented sand control and water control well completion process pipe column and method, the purposes that pipe column tripping-in is not limited, the packing effect of a filling well is good, and an adjusting function is achieved in the middle and later periods can be achieved.

The embodiment of the utility model provides a plug-in circuit breaker applied to a power cabinet and the power cabinet. The plug-in circuit breaker comprises a shell, a tripping mechanism and an operating mechanism, wherein the tripping mechanism and the operating mechanism are arranged on the shell; the tripping mechanism comprises a tripping rod and a trigger assembly, the tripping rod is connected with the operating mechanism, and the tripping rod rotates around the axial extension direction of the tripping rod and is used for driving a moving contact and a static contact of the operating mechanism to be contacted or separated; the triggering assembly is arranged on the side wall, in the axial extension direction of the tripping rod, of the shell and located at one end, in the axial extension direction of the tripping rod, and at least part of the triggering assembly is located on the outer side of the side wall and used for being in linkage with an external structural part; the trigger assembly is used for driving the tripping rod to rotate around the axial extension direction of the tripping rod. The automatic tripping device is suitable for a mounting mode of a circuit breaker placing surface in the width direction, and when the width direction of the circuit breaker is set in the height direction in the cabinet, the automatic tripping function can be realized.

The invention discloses an immovable string steam injection oil and gas production hydraulic lifting process, and relates to the technical field of mechanical oil and gas production equipment. According to the immovable tubular column steam injection oil and gas production hydraulic lifting technology, the working process of the immovable tubular column steam injection oil and gas production hydraulic lifting technology comprises the following steps that S1, in the ground working stage, ground equipment is composed and acts; and S2, the underground working stage is divided into an oil pumping process and a steam injection process, and the oil pumping process can also be divided into an upstroke stage and a downstroke stage. The frequency converter is adopted to adjust the frequency, a double-channel structure is adopted, resetting of the hydraulic lifting device is completed, the reciprocating mode achieves pumping of crude oil, due to the fact that a sucker rod is not arranged, the sucker rod is not stretched and shortened, and meanwhile when a pipe column is stretched and shortened, the feedback oil well pump is stretched and shortened as well, the effective stroke of the feedback oil well pump is prolonged, and the oil pumping efficiency is improved. The effective discharge capacity of the pump is improved, the tripping-in depth of the oil well pump can be effectively increased, and then the production potential of an oil well can be fully exerted.

The invention relates to the technical field of circuit breakers, and discloses a plastic shell type circuit breaker which comprises a shell, a tripping mechanism and a contact assembly, the contact assembly comprises a moving contact and a static contact, the plastic shell type circuit breaker further comprises an overload protection mechanism, the overload protection mechanism comprises a first bimetallic strip and a time delay assembly, the first bimetallic strip is vertically arranged, and the time delay assembly is arranged in the shell. The lower end of the first bimetallic strip is connected to the moving contact, the upper end of the first bimetallic strip corresponds to the tripping mechanism, the delay assembly comprises a displacement control module and a second bimetallic strip, the displacement control module is driven by thermal deformation of the second bimetallic strip, and a bending path of the first bimetallic strip is limited or released through displacement state switching, so that delay tripping judgment is realized. The invention provides a plastic shell type circuit breaker which can solve or at least alleviate the problems that a traditional circuit breaker is unreliable in time delay adjustment, prone to being interfered by environment temperature and poor in stability.

The invention provides a cooling control method, a drilling system and a program product. The well drilling system comprises a ground drilling fluid cooling subsystem used for conducting graded cooling on drilling fluid returned from a shaft by a drilling fluid conveying pipeline based on cooling parameters and re-injecting the cooled drilling fluid into the drilling fluid conveying pipeline located in the shaft; the underground drill column is provided with at least one heat shielding drill rod used for reducing heat transferred to the interior of the drill column from the high-temperature annulus. The control subsystem is used for obtaining the shaft temperature distribution condition in the drilling fluid circulation process according to the shaft thermodynamic model, and controlling the cooling parameters of the drilling fluid cooling subsystem and the tripping-in time and position of the heat shielding drill rod based on the shaft temperature distribution condition in the drilling fluid circulation process; the underground while-drilling instrument is provided with a heat dredging device and used for reducing the heat conduction amount of the external environment to the underground while-drilling instrument. According to the invention, conventional drilling technical equipment can be suitable for the shaft temperature environment of drilling of an ultra-deep well and a geothermal well.

The invention provides a self-adaptive drill falling prevention clamp holder, belongs to the technical field of geological exploration, and aims to solve the problem that in the prior art, when a clamp holder clamps a drill rod, piston rods of two groups of clamping oil cylinders are easy to slightly retract, so that the drill rod and a drilling tool accidentally fall into a drill hole. Comprising a shell and slip bowls located in the shell, oil cylinders corresponding to the slip bowls in number are transversely arranged on the side wall of the shell, and the ends of piston rods of the oil cylinders penetrate into the shell to be connected with clamping blocks; a clamping groove is formed in the back of the slip bowl, the clamping block is embedded in the clamping groove in a sliding mode, a first inclined face is arranged at one end of the clamping groove, and a second inclined face attached to the first inclined face is arranged at the end, facing the clamping groove, of the clamping block. According to the invention, due to the cooperation of the first inclined surface and the second inclined surface, when the drill rod falls, the drill rod is tightly clamped by the annularly distributed slips, so that the potential safety hazard that the drill rod and a drilling tool accidentally fall into a drill hole in the tripping process is fundamentally eliminated.

A drill rod stress wave reduction device belongs to the technical field of down-the-hole hammer drilling tools and comprises an upper connector, a semicircular clamp, a spline housing, a spline shaft and a gasket assembly. Wherein the gasket assembly is formed by tightly stacking at least two layers of gaskets, each gasket is made of two or two materials with different wave impedances, the wave impedances of any two adjacent gaskets are different, when stress waves are transmitted to the wave clipping device from the impactor at the lower end, the stress waves can sequentially pass through interfaces with different material wave impedances, and the wave clipping effect is achieved. Incident stress waves can be reflected and transmitted on an interface, and the stress wave peak value and stress wave energy finally transmitted to the upper drill rod are greatly reduced. The stress wave reduction protection device is simple in structure, convenient to install and low in manufacturing cost, the service life of the drill rod is prolonged, the tripping time is shortened, and the drilling efficiency is effectively improved.

The application discloses a quick closing operation mechanism of a circuit breaker, which comprises a shell, a handle, a static contact support, a movable contact support, a linkage and a tripping mechanism, the handle and the movable contact support are rotationally arranged in the shell, a contact torsional spring is arranged between the shell and the movable contact support, a long circular hole is arranged on the movable contact support, a pin shaft is arranged in the shell and passes through the long circular hole, and the movable contact support rotates relative to the pin shaft; an installation area is arranged in the shell, an energy storage limiting piece is slidably arranged in the installation area, a movable area is arranged on the handle, an abutting portion is arranged on the movable contact support, the energy storage limiting piece is provided with a moving portion and a matching portion which are arranged in the movable area, the application can make the movable contact support move beyond the stroke, is not limited to a fixed point, improves the contact force, and based on the energy storage limiting piece, the last action of closing is realized to store energy, the oxides between the movable contact and the static contact can be quickly broken down, and the overall closing effect is improved.

The invention discloses a drilling fluid flow calculation method for gas lift reverse circulation drilling. The drilling fluid flow calculation method comprises the following steps: S1, defining a gas lift reverse circulation lifting force and friction loss pressure model; s2, assuming that the drilling fluid flow in the circulation process is Qm; s3, calculating the total friction pressure of gas lift reverse circulation; s4, calculating the gas lift reverse circulation lifting force; and S5, according to the gas-lift reverse circulation lifting force and the gas-lift reverse circulation total friction force, the upward backflow amount of the drilling fluid is calculated. According to the invention, by inputting the gas lift reverse circulation well depth structure and the drilling related parameters, the influence of the gas lift reverse circulation well depth structure and the drilling related parameters on the backflow amount of the drilling fluid is researched, so that the optimal operation parameters of the optimal gas lift reverse circulation are obtained. According to the method, parameters of the air compressor air supply amount, the double-wall drill rod tripping-in depth, the double-wall drill rod specification and the single-wall drill rod specification selected for drilling of the gas lift reverse circulation geothermal well drilling can be optimized, and a reasonable theoretical basis is provided for more reasonably achieving gas lift reverse circulation drilling.

The utility model belongs to the field of withstand voltage test of safety tools, and provides an insulation withstand voltage test device, which comprises a table top arranged on a cabinet body; the back plate is arranged on the cabinet body, a lifting mechanism is arranged on the back plate, and an electrode plate is installed at the lifting end of the lifting mechanism; the top plate is arranged at the top end of the back plate, a high-voltage wire branch pipe assembly is arranged on the top plate, a high-voltage shell assembly is arranged at the output end of the high-voltage wire branch pipe assembly and comprises an automatic tripping system, the automatic tripping system comprises a body and a telescopic rod arranged on the body, and a conductive spring is hung at the outer end of the telescopic rod. The bottom end of the conductive spring is fixedly connected with the lifting end of the lifting mechanism, and the bottom end of the conductive spring is electrically connected with the electrode plate. By arranging the lifting mechanism, the device can automatically put down the electrode plate to start the test during the test, and can automatically lift up the electrode plate after the test is completed. Wherein the automatic tripping system is connected with the electrode plate through a conductive spring, so that manual tripping can be realized, and automatic tripping can also be realized.

The invention discloses a built-in backup protection tripping device of a circuit breaker, and belongs to the technical field of circuit breakers. Comprising a magnetic steel unit group and an actuating mechanism, the magnetic steel unit group is composed of a fixed first magnetic steel group and a slidable second magnetic steel group, and an induced current is generated when the magnetic steel unit group is electrified to drive the second magnetic steel group to move transversely; the action mechanism comprises a push plate, a push plate spring, an inclined plane guide block and a push rod, when short circuit occurs, the electromagnetic driving force overcomes the spring force and drives the push plate to move transversely, the transverse movement of the push plate is converted into the vertical movement of the push rod through the inclined plane guide block, and a tripping rod of the circuit breaker is pushed to rotate to realize tripping. According to the device, a non-excitation type and passive response type backup tripping mechanism is constructed by innovatively adopting an induction magnetic steel group and an inclined plane motion conversion mechanism, the technical defect of protection failure caused by electromagnetic interference of a traditional electromagnetic tripping device is fundamentally overcome, and the device is particularly suitable for the application field with extremely high requirements on safety and stability.

A circuit breaker relates to the technical field of low-voltage electrical appliances and comprises a shell, a handle, an operating mechanism and a contact mechanism, the shell is provided with a first rotating shaft and a second rotating shaft, the operating mechanism is mounted on the first rotating shaft and comprises a mechanism seat, a jump fastener and a lock fastener, the contact mechanism comprises a moving contact and a static contact, the moving contact is mounted on the second rotating shaft, and the static contact is mounted on the second rotating shaft. The handle and the jump fastener are connected through a first connecting rod. The jump fastener and the moving contact are connected through a second connecting rod. During normal switching-on or switching-off operation, the locking fastener is buckled with the tripping fastener, and the handle is driven to drive the mechanism seat to rotate around the first rotating shaft through the first connecting rod, so that the moving contact is driven to be close to or far away from the static contact through the tripping fastener and the second connecting rod; when a fault is tripped, the locking piece and the tripping piece are tripped, and the moving contact is driven to rotate around the second rotating shaft so as to be far away from the static contact. According to the circuit breaker, the operating mechanism and the moving contact are respectively arranged on different rotating shafts, and the motion decoupling of the operating mechanism and the moving contact is realized during fault tripping, so that the moving contact can be quickly broken.

The utility model relates to an electric leakage fault indicating mechanism of an electric leakage circuit breaker, which comprises a shell, a handle, a contact frame, a jump pin, a lock catch, a U-shaped pull rod, an electric leakage tripper and a tripping piece, the tripping piece acts along with an ejector rod of the electric leakage tripper and abuts against the lock catch, linkage matching of the lock catch and the tripping piece is formed, and a tripping indicating piece is arranged on the shell in a sliding mode. An indicating hole is formed in the position, corresponding to the tripping indicating piece, of the shell, the tripping indicating piece is provided with a linkage piece extending between the jump pin and the contact frame, the jump pin is provided with a protruding block matched with the linkage piece, the protruding block acts along with the jump pin and abuts against one side of the linkage piece, and linkage matching of the tripping indicating piece and the jump pin is formed. The contact frame is provided with a protruding strip matched with the linkage piece, the protruding strip acts along with the contact frame and abuts against the other side of the linkage piece, and linkage matching of the tripping indicating piece and the contact frame is formed. The utility model has the advantages of simple structure, stable and reliable performance, convenient assembly and accurate indication.

The invention discloses a device and a method for detecting frictional resistance of a casing in a fixed casing. The device comprises a first pipe body, a second pipe body, a third pipe body, a fourth pipe body, a weighting pipe fitting, a fifth pipe body and a drill bit mechanism which are connected in sequence, the second pipe body and the third pipe body are rotationally connected through a first meshing rotating assembly driving the third pipe body to rotate in the circumferential direction. The third pipe body and the fourth pipe body are rotationally connected through a second meshing rotating assembly driving the fourth pipe body to rotate in the circumferential direction. The second pipe body and the third pipe body are each provided with a friction resistance detection assembly of the same structure, and the friction resistance detection assemblies are used for detecting the friction resistance between the casing and a shaft in the wall attaching advancing process. By means of the friction resistance detection assembly, friction resistance of different casing pipe tripping-in working conditions during casing fixing in the test casing can be simulated in the tripping-in process, the simulated working conditions better fit the actual situation, a decision basis is provided for later casing pipe safe tripping-in, an old well shaft can be cleaned, and later casing pipe safe tripping-in is guaranteed.

The invention discloses a method for predicting the mechanical wear of a circuit breaker, and relates to the testing of the switching capacity of the circuit breaker, and the method comprises the steps: collecting the operation time T and the operation frequency N of the circuit breaker, and the duration Di and the current value Ii of the current during the ith switching-on, switching-off, tripping or tripping; a mechanical wear rate model is constructed, and the contribution of the running duration, the mechanical operation frequency and the current events exceeding a set threshold value to wear is fused; not only is a tripping event considered, but also switching-on, switching-off and tripping events are considered; only wear caused by mechanical operation times is considered for current events lower than a threshold value; the invention provides a complete method for predicting the mechanical wear of the circuit breaker, and the method is combined with the prediction of the electrical wear, so that a basis can be provided for the replacement and maintenance of the circuit breaker more accurately.

The utility model belongs to the technical field of circuit breakers, and discloses an operating mechanism of a circuit breaker and the circuit breaker. The operating mechanism of the circuit breaker comprises a contact support, a lock catch, a jump pin and a tripping rod. Both the lock catch and the jump pin are rotatably arranged on the contact support, the lock catch and the jump pin are in lap joint with each other, a first arm of the tripping rod is connected with the lock catch, a second arm of the tripping rod is connected with one side provided with the overload protection mechanism, and the overload protection mechanism is heated to abut against the second arm so as to drive the tripping rod to rotate, so that the lock catch rotates to be separated from the jump pin, and opening of the circuit breaker is achieved. A special-shaped hole is formed in the lock catch, a limiting part is arranged at the end of the first arm of the tripping rod, the first arm of the tripping rod can penetrate through the special-shaped hole from the front face of the lock catch, and the limiting part can be limited to the back face of the lock catch after penetrating through the special-shaped hole. According to the utility model, reliable connection between the lock catch and the tripping rod is realized, and the condition that the tripping rod falls off from the lock catch in the assembling process or the using process is avoided.

The invention provides a tool applied to the field of petroleum drilling, and particularly relates to a connecting rod type electric control multistage variable-diameter centralizer which is characterized in that an execution module and a communication module are core modules of the connecting rod type electric control multistage variable-diameter centralizer, and the execution module comprises a stroke control unit and a push-out unit; the stroke control unit enables an upper conduction section to move downwards through the pressure of drilling fluid, an armature extends out and is clamped into a key hole under the action of electromagnets to achieve stroke control, the three electromagnets are controlled on the ground to be electrified to achieve multi-stage diameter changing, and the push-out unit moves downwards through a connecting rod driving section, so that a push-out rod horizontally pushes out a centralizing block. The tool is located in the center of a shaft, the communication module enables the lower conduction section to move downwards through the pressure of drilling fluid, and therefore the pressurizing block is pushed to stretch out inwards, the pressure of the drilling fluid is increased, and the ground can know whether centralizing is in place or not by capturing a pressure signal of the drilling fluid. Multi-stage reducing can be provided, the tripping frequency is reduced, and the drilling efficiency is effectively improved.

The invention provides a tripping indication structure of a circuit breaker, which comprises a tripping indication piece and an elastic piece, the elastic piece is connected between a shell and the tripping indication piece, the tripping indication piece is arranged on the shell and can move back and forth between a switching-on and switching-off position and a tripping position, the tripping indication piece is provided with a limiting part which is in limiting fit with a resisting part of the shell, and the limiting part is arranged on the shell. The operating mechanism of the circuit breaker is provided with a driving part. When the circuit breaker is switched off or switched on, the limiting part is matched with the resisting part; when the circuit breaker is tripped, the driving part drives the limiting part to be separated from the resisting part, and the tripping indicating piece moves from the opening and closing position to the tripping position under the elastic force of the elastic piece. The invention further provides a circuit breaker which comprises an operating mechanism and the tripping indication structure. According to the tripping indication structure of the circuit breaker and the circuit breaker, when the circuit breaker trips due to a fault, the driving part drives the tripping indication piece to release the limitation between the tripping indication piece and the resisting part, and the tripping indication piece realizes position switching under the action of the elastic piece, so that the tripping state is displayed.

The invention relates to the technical field of drilling pressure of extended reach wells, in particular to a drilling pressure auxiliary stabilizing propeller applied to fixed operation of extended reach wells. A plurality of groups of auxiliary guide assemblies, abutting position limiting assemblies and protective plates are arranged on the outer side of the outer protective cylinder in an annular array mode with the circle center of the outer protective cylinder as the center; compared with the prior art, all-directional stability of the drilling tool is achieved through cooperation of all the assemblies, the main abutting plate and the auxiliary abutting plate are matched with the hydraulic push rod, the drilling tool can adapt to + / -5% borehole diameter change, the tripping frequency is reduced, supporting and moving are adjusted through the hydraulic push rod and a motor according to the hardness of a stratum, and the drilling pressure transmission efficiency is improved; the limiting guide wheel is driven by the hydraulic push rod, so that resistance can be reduced, the self-adaption to the borehole curvature is realized, and the stress concentration condition is avoided.

The invention relates to the field of intelligent sliding sleeves, in particular to a fracturing pipe column capable of detecting the upper portion and controlling the lower portion and a fracturing method thereof, and aims to solve the technical problem that an existing intelligent sliding sleeve is unstable in performance after being standby for a long time. According to the fracturing string capable of detecting the upper part and controlling the lower part, enough distance and time are reserved for a sliding sleeve opening tool to execute a setting action in a manner of detecting the upper-stage identification short section and opening the lower-stage fracturing sliding sleeve, so that the reliability is higher; compared with the prior art, a motor and a power supply system do not need to be arranged in the fracturing sliding sleeve, after the sliding sleeve opening tool is started, setting is completed through well pressure power, meanwhile, the inner sleeve is moved away from the plugging position through well pressure, the fracturing hole channel is opened through well pressure and liquid, the design power is sufficient, and the opening success rate is high. In addition, due to the fact that the control module adopts an induction counting mode, disordered tripping-in and infinite fracturing of the fracturing sliding sleeve can be achieved.