513 results about "Tripping" patented technology

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 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 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 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 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 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 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 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 technical scheme belongs to the technical field of circuit breakers, and particularly relates to a button tripping structure of a circuit breaker, which comprises a shell, a short-circuiting device, a tripper and a testing mechanism, the testing mechanism forms a loop to attract an armature after being electrified, the tripping structure is arranged in the shell and is linked with the testing mechanism, and the button tripping structure comprises a reset button, a linkage rod, an elastic piece and the armature. The reset button slides at a button opening in the side wall of the shell and is provided with a clamping part; the other end of the linkage rod penetrates through the through hole of the shell and is connected with the short-circuiting device; the elastic piece abuts against the reset button and the inner wall of the shell, so that the reset button tends to move towards the linkage rod, the armature is hinged to the interior of the shell, a lock catch protrusion is arranged and can be switched between a first position and a second position around a shaft, at the beginning, the armature is opened at the first position, and a clamping part of the lock catch protrusion limits the reset button. When the circuit breaker is released, the lock catch protrusion is released from the clamping portion, the elastic piece pushes the reset button to slide to the button opening, the linkage rod moves along with the reset button to release the circuit breaker, and releasing is smooth and efficient.

A circuit breaker structure capable of reducing tripping force comprises a connecting rod, one end of the connecting rod is linked with an operating handle, and the circuit breaker structure is characterized in that the other end of the connecting rod is linked with two side parts of a mechanism seat and a linkage part on a jump pin, so that the stress of the other end of the connecting rod is dispersed to the two side parts of the mechanism seat and the jump pin; the tripping force required by tripping of the operating mechanism is reduced, the operation stability of the product is improved, and the risk of buckle sliding of the product is reduced. Meanwhile, in the movement process of the operating mechanism, the contact surfaces of the connecting rod, the jump pin and the two side parts of the mechanism seat are adaptively adjusted, so that the abrasion of the upper and lower walls of the mechanism seat and the distortion of the mechanism are reduced.

The invention relates to a ground simulation device for testing an underground logging pup joint, which comprises a logging pup joint and a leak-off ring which are arranged in a kettle body, the logging pup joint is positioned in the leak-off ring, the kettle body is connected with a slurry injection unit, and the slurry injection unit is used for injecting slurry into a space in the leak-off ring and a space outside the leak-off ring. The slurry injection unit is also used for injecting pressure into the leak-off ring, so that the slurry in the leak-off ring is filtered into a mud cake; electromagnets and force measuring sensors are arranged on the left side and the right side of the kettle body, the electromagnets are used for providing suction force for the well logging short section, and the force measuring sensors are used for measuring the suction force of the corresponding electromagnets; the lower end of the kettle body is connected with a vertical force applying unit, and the vertical force applying unit is used for injecting a jam releasing force in the vertical direction to the lower end of the kettle body so as to research the relationship between the jam releasing force and the suction force. Potential hazards possibly caused by testing of the well logging short section in an actual well are greatly avoided, and manpower, material resources and time cost are saved to a great extent.

The invention relates to the technical field of circuit breakers, and discloses a circuit breaker with a clapping type tripping assembly, which comprises a shell, an inner cavity of the shell is rotatably connected with an operating rod, a gas generation assembly is fixedly mounted at the bottom end of the inner cavity of the shell, and driving assemblies are arranged at the front end and the rear end of the operating rod. And a blowing assembly is fixedly mounted on the left side of the gas generation assembly. The gas box is arranged in the shell, when a circuit fault occurs, the operation rod rotates to drive the gear ring to rotate, then the first rack, the extension rod and the lifting plate are driven to move downwards, gas in the gas box is squeezed into the one-way gas outlet pipe, the gas is sprayed out upwards through the spray head, an arc is pushed by gas flow to quickly pass through the arc chute, and the arc extinguishing effect is achieved. And the arc extinguishing speed is improved.

The present invention relates to a leakage tripping mechanism for a leakage circuit breaker, comprising a circuit breaker housing, a handle, a tripper disposed within the circuit breaker housing, and a tripping mechanism, the tripping mechanism comprising a lock, a tripping latch, and a lock spring, the tripping mechanism further comprising a bracket, a paddle, and a lever, the bracket being rotatably disposed within the housing via a first mounting shaft, the first mounting shaft being rotatably provided with a lock, the paddle being rotatably disposed within the housing via a second mounting shaft, the paddle being disposed in contact with a top rod on the tripper, the lever being provided with a first arm and a second arm, the first arm being disposed in contact with an upper end surface of the paddle, the second arm being provided with a long slot, the lock and the second arm being linked and coordinated via a pull rod, one end of the pull rod being fixed to the lock, and the other end being slidably disposed within the long slot. By adopting the above-mentioned technical solution, the present invention provides a leakage tripping mechanism for a leakage circuit breaker, which has a reasonable layout, high space utilization, and does not affect the space occupied by the magnetic ring.

The present invention discloses a control and protection switch electrical appliance, which is characterized in that: it includes an upper shell and a lower shell that are detachably connected. An installation rack and a tripping device are detachably arranged on the upper shell. A handle shaft that is inserted into the lower shell is movably penetrated through the installation rack and the upper shell. A tripping cam is hinged in the lower shell through a first pin shaft, and a first tension spring for promoting its counterclockwise rotation is equipped on the tripping cam. A protrusion that can abut against the tripping cam is arranged at the lower end of the handle shaft, and a torsion spring is sleeved on the handle shaft. The tripping cam of this control and protection switch electrical appliance has a normal state, a fault (overload, open phase, leakage) tripping state, a short-circuit fault tripping state, a manual disconnection state, and a re-latching state after tripping. The upper surface of the upper shell is a control structure, and the lower surface is a tripping structure, with fewer layers, smaller volume, simple structure, functional differentiation, and lower cost.

The utility model relates to a tripping mechanism and circuit breaker relates to electrical switch technical field. The tripping mechanism includes support, lock catch spare and jump catch spare, support, lock catch spare and jump catch spare set up in the casing of circuit breaker respectively, support is connected with casing, lock catch spare, jump catch spare and the movable contact of circuit breaker rotation respectively, lock catch spare is used for with jump catch spare buckle, jump catch spare is connected with the handle transmission of circuit breaker, handle is driven through support, lock catch spare and jump catch spare common cooperation drive movable contact and the static contact of circuit breaker and open or close gate, wherein, the connecting line direction of the rotation connection point of support and casing and the rotation connection point of jump catch spare and support is first direction, the connecting line direction of the rotation connection point of support and casing and the rotation connection point of movable contact and support is second direction, the included angle between first direction and second direction is less than 90 DEG. The circuit breaker includes above-mentioned tripping mechanism. The tripping mechanism and circuit breaker can solve the problem that the volume of traditional circuit breaker is bigger.

The invention discloses a quick tripping drilling machine and a tripping and tripping method thereof. The drilling machine comprises a site multifunctional device which is arranged on the front ground and used for turning a drilling tool into a horizontal state or a vertical state; the power drill rod box is arranged on at least one side of the site multifunctional device and used for conveying drilling tools to the site multifunctional device or receiving the drilling tools from the site multifunctional device. The base is arranged on the ground on the rear side of the site multifunctional device, the base is provided with a power slip used for clamping a drilling tool in the center of a well mouth, an iron roughneck used for screwing on and screwing off at the position of the well mouth and a derrick, a top drive is arranged in the derrick, a power elevator is hung on the lower portion of the top drive, and a pushing manipulator is arranged on the middle rear portion of the derrick. By means of flexible configuration and collaborative operation of the ground site multifunctional device and the power drill rod box, the three-joint unit does not need to be stored on a table top in the tripping operation process, and operation is directly conducted between the drill rod box and a well mouth.

The utility model discloses an oil-immersed circuit breaker short circuit protection tripping mechanism which comprises an excitation conductor, an instantaneous armature, a limiting plate and a reset elastic piece, the instantaneous armature is rotatably arranged on a circuit breaker shell and located on the lower side of the excitation conductor, and the limiting plate is rotatably arranged on one side of the instantaneous armature and is in limiting fit with a contact mechanism of a circuit breaker. A push rod piece used for pushing the limiting plate to rotate is formed on the instantaneous armature, and the reset elastic piece is connected with the instantaneous armature. When a short-circuit fault occurs in the circuit breaker, the instantaneous armature is attracted by electromagnetic force to rotate towards one side of the excitation conductor, and the limiting plate is pushed to rotate through the push rod piece, so that the contact mechanism is triggered to execute tripping and opening actions, and after the short-circuit fault of the circuit breaker is relieved, the instantaneous armature is driven to rotate. And the instantaneous armature can rotate towards one side far away from the excitation conductor under the action of the elastic force of the reset elastic piece, so that the quick reset function of the instantaneous armature is realized, and the use safety and reliability of the product are improved.

This invention belongs to the field of oil and gas drilling technology, specifically relating to a PDC drill bit with automatically updating composite cutting discs. It aims to solve the problem of existing drill bits requiring tripping and bit replacement when drilling speed decreases due to tooth wear, thus affecting drilling efficiency. The PDC drill bit with automatically updating composite cutting discs includes a drill bit body, a mounting groove on the drill bit body, and multiple cutting discs arranged side-by-side in the mounting groove. Below the mounting groove is a longitudinally extending output channel communicating with the mounting groove, and adjacent cutting discs are connected in the output channel by a tenon and mortise structure. It also includes a drive device located at the bottom of the drill bit body. During normal drill bit operation, the drive device is pressurized and stores power; when the drill bit is lifted, the drive device applies a downward pulling force to the cutting discs to move them downwards. This PDC drill bit can automatically update the cutting discs during drilling, to a certain extent avoiding tripping due to drill bit wear and improving production efficiency.

A method for tripping out of an underbalanced well, the method comprising: determining the drilling fluid balance density and the annular pressure loss outside the drill pipe; determining the time for oil and gas to surge to the wellhead and the tripping time to the depth of the first injected gas plug, and comparing them to determine whether the conditions for safe operation are met; if the conditions for safe operation are met, determining the density and volume of the first gas plug based on the drilling fluid balance density and the annular pressure loss outside the drill pipe; tripping out of the well based on the density and volume of the first gas plug, completing the tripping out of the first gas plug; determining the density and volume of the gas plug at the depth near the wellhead using a preset method based on the depth after the tripping out of the first gas plug; and completing the tripping out of the gas plug near the wellhead based on the determined density and volume of the gas plug at the depth near the wellhead.

An active safety protection device for tripping a tubular column of a workover rig belongs to the safety production technology of oil field workover rigs, overcomes the defects in the prior art, and comprises a pressure sensor, an A / D sampling chip, a main chip, a keyboard, an LED display screen and a safety module, the pressure sensor is connected with the A / D sampling chip, the A / D sampling chip is connected with the main chip, and the main chip is connected with the keyboard. The keyboard, the LED display screen and the safety module are connected with the main chip; the safety module comprises an emergency braking device, an engine throttle disconnecting device, a roller clutch disconnecting device and an audible and visual alarm.

The invention relates to the technical field of petroleum drilling downhole tools, and provides a directional drilling tubular column and a well deviation control method thereof. The directional drilling pipe column comprises a drilling tool assembly, a measuring system assembly, a well deviation adjusting pup joint assembly and a bent motor power assembly. The well deviation adjusting method comprises the steps that a control command is received; controlling a power mechanism of the well deviation adjusting pup joint assembly according to the control command so as to adjust the outer diameter of the well deviation adjusting pup joint assembly, so that the directional drilling pipe column is attached to and supported on the well wall; the drilling tool assembly is controlled to apply drilling pressure, the bending motor generates torque and power in the specific direction, and the drill bit drills in the preset direction. The directional drilling pipe column can adjust well deviation, and repeated tripping operation is not needed.