817 results about "Mud pump" patented technology

The invention discloses a slurry pump control method and related equipment, and relates to the technical field of seawater desalination, and the method comprises the following steps: obtaining sensor data of a slurry pump; data analysis is conducted on the sensor data, and the working condition abnormal index of the slurry pump is determined; determining a target control instruction corresponding to the working condition abnormal index based on the working condition abnormal index and a preset threshold interval; and based on the target control instruction, the slurry pump is controlled to execute corresponding target regulation and control operation. Real-time monitoring and intelligent judgment of the operation state of the slurry pump are achieved, early warning can be triggered at the initial stage of equipment abnormity, the operation parameters can be adjusted in a self-adaptive mode, the response delay problem of a traditional single control mode is effectively avoided, and the operation reliability and safety of the equipment are improved.

The invention discloses a slurry flow velocity measurement method, device and system for a slurry pump, and relates to the technical field of slurry flow velocity measurement, and the method comprises the steps: employing an ultrasonic transducer to transmit an ultrasonic signal to a slurry pipeline and receive a reflection signal, and obtaining ultrasonic propagation data; constructing a slurry flow velocity profile model according to the ultrasonic propagation data, and calculating slurry flow velocity and solid phase concentration distribution based on the slurry flow velocity profile model; and based on the slurry flow velocity and the solid-phase concentration distribution, rheological correction is conducted by combining the slurry flow state, and the actual slurry flow velocity of the slurry pump is obtained. According to the method, the non-Newtonian characteristic and the solid-phase migration effect of the slurry are considered in the measurement process, a rheological parameter dynamic correction mechanism based on the Reynolds number is established, and the measurement precision under the working conditions of high-sand-content and high-density slurry is improved compared with a traditional method.

The invention discloses an automatic control method based on artificial intelligence, relates to the technical field of petroleum drilling, and is applied to a slurry pump. The method comprises the following steps: acquiring a slurry pump, determining fluid pulsation characteristics, mechanical wear characteristics and pump efficiency loss characteristics of the slurry pump according to a preset multi-physics field coupling model so as to construct a multi-modal characteristic vector, then generating an initial control instruction based on a preset fuzzy RBF neural network model, and finally verifying and correcting the initial control instruction based on a digital twinborn model so as to obtain a digital twinborn model. And generating a final control instruction to adjust the working state of the slurry pump according to the final control instruction, thereby realizing real-time monitoring and intelligent control of the running state of the slurry pump, being independent of artificial experience, improving timeliness and accuracy of slurry pump control, and further improving efficiency and safety of drilling operation.

The invention relates to an intelligent masonry robot for an underground roadway. The engineering truck comprises a guniting engineering truck and a masonry engineering truck, the guniting engineering truck comprises a mining pickup truck, a stirrer and a slurry pump, and the masonry engineering truck comprises a crawler walking part, a diesel engine pump station, an anti-explosion electric box, a navigation bridge, an auxiliary mechanical arm, a brick placing platform, special bricks and a masonry mechanical arm. The guniting engineering vehicle and the masonry engineering vehicle can operate independently and cooperate with each other during masonry. The auxiliary mechanical arm places a special claw on the brick placing platform, the masonry mechanical arm grabs special bricks above the brick placing platform, mortar is smeared on the special bricks at the position of the mortar spraying nozzle through cooperation of all levels of arms and the mechanical claw at the tail end, the special bricks are built in a roadway, and integration of mortar spraying, mortar coating and bricklaying is achieved under the assistance of the roadway wall structure parameter real-time detection technology. The construction method has the advantages that a traditional manual masonry mode is replaced, and the construction method has the advantages of being good in maneuverability, high in adaptability, high in masonry efficiency, good in sealing effect and high in gas and CO blocking capacity.

The invention relates to the technical field of mine solid waste treatment and carbon dioxide sealing and storage, and particularly discloses a system and a method for sealing and storing carbon dioxide by utilizing coal-based solid waste and mine water to prepare slurry. The system comprises a cement bin, a gangue bin, a coal ash bin, a gasified slag bin, a mine water storage tank, a stirring reaction kettle, a carbon dioxide storage tank, a slurry temporary storage tank, a vacuum pump and a slurry pump, and the stability and adsorption efficiency of carbon dioxide fixation are improved in the mode that coal-based solid waste, mine water and carbon dioxide are subjected to chemical reaction and physical adsorption; meanwhile, the prepared backfill slurry has high-strength anti-pressure ability, the stability of the backfilled underground goaf is better improved, further, coal-based solid waste and mine water are utilized for waste recycling, and the carbon dioxide storage cost is reduced.

The invention discloses an intelligent drilling mud pump, and relates to the technical field of mud pump devices, the intelligent drilling mud pump comprises a supporting frame body, the top of the supporting frame body is provided with a mud pump main body, and the mud pump main body is composed of two sets of cylinder barrels, a power assembly, two sets of reciprocating pressure pumping assemblies, a feeding pipe and a discharging pipe. According to the intelligent drilling mud pump, the displacement and efficiency of the pump are improved, the reciprocating frequency of the pump can be reduced through a bidirectional working mode, energy consumption can be reduced, then it can be guaranteed that under the condition that the speed of the power assembly is not changed, reciprocating motion of the reciprocating pressure pumping assembly can do work, single-stroke work of the reciprocating pressure pumping assembly is changed into double-stroke work, and the working efficiency is improved. Therefore, the slurry conveying efficiency can be improved and the cost can be reduced under the condition that the speed of the slurry pump is not changed, meanwhile, in the slurry conveying process, sand and stones in the conveyed slurry can be filtered through the filtering and cleaning assembly, the intercepted sand and stones can be cleaned in time, and the slurry conveying quality can be guaranteed.

The invention provides a mud pump three-frequency fusion risk assessment method and system and electronic equipment. The method comprises the steps that vibration signals of all measuring point positions in the healthy operation state of a mud pump are monitored; variational mode decomposition is carried out on the vibration signals, mode components are obtained, and permutation entropies of the mode components are extracted to form an evaluation feature vector set; constructing an SVDD hypersphere model based on the evaluation feature vector set; and monitoring operation vibration signals of each measuring point position of the to-be-tested slurry pump in a working state, analyzing the operation vibration signals by adopting the SVDD hypersphere model, and performing risk assessment on each measuring point position of the to-be-tested slurry pump. According to the three-frequency fusion risk assessment method for the slurry pump, the SVDD hypersphere model is constructed on the basis of the vibration signals of all the measuring point positions, the operation vibration signals of all the measuring point positions of the to-be-measured slurry pump are monitored, and real-time comprehensive monitoring of the running state of the slurry pump and rapid and accurate identification of potential risks are achieved.

The invention discloses a liquid pumping assembly of a hydraulic slurry pump and the hydraulic slurry pump adopting the liquid pumping assembly. The liquid pumping assembly of the hydraulic slurry pump comprises a left oil cylinder, a square box with a box cover, a cylinder sleeve, a pump head, a liquid outlet assembly and a right oil cylinder which are sequentially connected from left to right. The right end of the first power output shaft is connected with a piston capable of transversely moving in the cylinder sleeve through a movable connecting piece located in the square box. A top oil cylinder is vertically arranged at the top end of the pump head, a second power output shaft partially located in an inner cavity of the pump head is vertically arranged at the top of the top oil cylinder, and a first sealing valve is arranged at the bottom end of the second power output shaft. A pump head liquid outlet is formed in the right end of the pump head, a right oil cylinder is transversely arranged at the right end of the liquid outlet assembly, a third power output shaft partially located in an inner cavity of the liquid outlet assembly is transversely arranged in the right oil cylinder, and a second sealing valve is arranged at the left end of the third power output shaft; the liquid outlet assembly is provided with a liquid drainage hole communicated with an inner cavity of the liquid outlet assembly. The invention has the characteristics of stable and accurate flow and pressure and high stability.

The invention relates to the technical field of logging, and discloses a logging-while-drilling mud pressure wave signal processing method and system, a terminal and a medium, and aims at acquiring noise signals of a mud pump, performing Fourier transform, determining working frequency band characteristics of the mud pump, acquiring and performing Fourier transform during pressure wave signal transmission, and determining current working frequency band characteristics. On the basis of the comparison result of the characteristics of the two sections of frequency bands, a proper filter is determined, quantitative and accurate filtering of noise signals is achieved, and the characteristics of original pressure wave signals are effectively recovered. The noise frequency band characteristic of the mud pump signal is determined by accurately analyzing the frequency band characteristic of the mud pump signal, and the recovery of the pressure wave signal is realized by combining the frequency spectrum characteristic of the pressure wave signal and based on the design and selection of a band-pass / band-stop filter; according to the signal processing method, noise filtering is carried out based on actual parameter adjustment to replace original experience-based setting, so that an engineer can rapidly debug instrument parameters based on operation parameters, and the instrument debugging time is shortened.

The invention belongs to the technical field of slurry pumping and discharging, and particularly relates to height-adjustable slurry pumping and discharging equipment which comprises two sets of inclined supporting rods. Each group of inclined supporting rods are arranged in a splayed shape; a mounting ring is fixedly connected to the top end of the inclined supporting rod; a cross rod is arranged on an inner ring between the two groups of mounting rings; the outer ring of the middle part of the cross rod is fixedly connected with a hanging lug; a chain block is hung on the hanging lug; a slurry pump is hung at the bottom of a lifting hook of the chain block; when the liquid level of mud in a mud pit fluctuates, an operator can adjust the lifting of the mud pump only by operating the chain block, so that the tedious procedures of binding, hoisting out, lowering and the like of a steel wire rope in a traditional mode are avoided, the non-operation waiting time is greatly shortened, and the construction continuity is ensured; meanwhile, the height of the slurry pump is adjusted in time, damage to the slurry pump is greatly avoided, the whole adjusting process is simple, an operator can independently complete the adjusting process, dependence on cooperation of multiple persons is reduced, and labor cost is saved.

The invention provides a drilling control method and system for a self-propelled complex drill bit, and the method comprises the steps: setting a rated cutting torque through obtaining roadbed soil, hydraulic power and geometric parameters, calculating the total propulsion resistance based on the roadbed strength to control the axial jacking force, and carrying out the safety verification of the drag force; calculating a critical flow velocity according to the characteristics of the drilling slag to adjust the discharge capacity and negative pressure of the slurry pump so as to determine an operation boundary; drilling and deslagging are cooperatively executed under the boundary, and the trajectory is corrected by combining a PID algorithm and the propulsion speed is optimized based on the theoretical mechanical drilling speed. According to the method, the technical problems that existing trenchless construction depends on experience to set parameters, scientific quantitative calculation of the slag discharge flow speed and the safety drag force is lacked, and then pipe cable blockage and drainage pipe damage are caused can be solved, and full-system cooperative efficient control of drilling, propelling, slag discharge and guiding based on multi-field coupling calculation is achieved.

The invention provides a digital twinning method for a mud pump for well drilling, which relates to the technical field of mud pumps, and comprises the following steps: aiming at the structural characteristics of the mud pump for well drilling, constructing a mud pump static model comprising a power end static model, a fluid end static model and an auxiliary static model; based on the slurry pump static model, well drilling production real-time data and slurry pump operation real-time data in the well drilling process are accessed to build a slurry pump database; and performing data driving on the slurry pump static model according to the data types of the drilling production real-time data and the slurry pump operation real-time data to obtain a slurry pump digital twinborn model which is in virtual-real synchronization with the real-time drilling process. The performance of the slurry pump can be improved, the maintenance cost is reduced, non-planned shutdown is reduced, and a foundation is laid for predictability of the slurry pump.

The utility model relates to the technical field of mud pump trucks, in particular to mud pump truck pipeline anti-blocking equipment which comprises a truck body, the truck body comprises a base, a pump body is fixedly installed on the surface of the base, a feeding pipe is fixedly connected to the surface of the pump body, and a discharging pipe is fixedly connected to the surface of the pump body. Through the arrangement of the filter plate, large impurity particles in slurry can be intercepted, the large impurity particles can be filtered out, the situation that the large impurity particles enter the pump body and the inner side of the conveying pipeline, and consequently the pump body and the conveying pipeline are blocked can be avoided, the conveying effect of the pump body can be guaranteed, and the service life of the pump body is prolonged. And meanwhile, the screw rod rotates and drives the insertion rod to move, insertion and separation of the insertion rod and the insertion groove can be achieved, limiting and limiting releasing of the mounting rod are facilitated, then cleaning or replacement of the filter plate is facilitated, and therefore the filtering effect of the filter plate on large impurity particles can be guaranteed.

The invention discloses a mining method using a mining vehicle with a rear collecting head. The mining method comprises the following steps that the volume of a mixture to be absorbed by a mud pump within time t is set; setting the optimal volume concentration of the mixture absorbed by the dredge pump; determining the volume of undisturbed soil absorbed by the dredge pump within the time t according to the volume of the mixture to be absorbed by the dredge pump within the time t and the optimal volume concentration of the mixture absorbed by the dredge pump; according to the digging depth of the collecting head, the width of the collecting head, the advancing speed of the collecting head and the time t, the volume of the volume undisturbed soil collected by the collecting head is collected; introducing a water body through a primer pump to dilute the undisturbed soil collected by the collection head to the optimal volume concentration of the mixture absorbed by the mud pump; according to a mass conservation method, the volume of the undisturbed soil absorbed by the dredge pump and the volume of the undisturbed soil collected by the collecting head within the time t, the relation between the collecting depth of the collecting head and the advancing speed of the collecting head is determined. The defect that the mining vehicle is poor in performance matching performance is overcome.

The utility model relates to an active load adjusting bridge system for a cutter suction dredger. Comprising a bridge frame, the root of the bridge frame is hinged to a cutter suction dredger body, a mud pump assembly and a mud pipeline are installed in the middle of the bridge frame, and a reamer assembly is installed at the end of the bridge frame; a portal frame is installed at the position of a bow of the cutter suction dredger body, a pulley system is installed at the top of the portal frame, a lifting pulley is installed at the top of the end of the bridge frame, a lifting winch is further installed on the cutter suction dredger body, and a lifting steel cable collected and released by the lifting winch is wound on the pulley system and the lifting pulley. And a hydraulic load assembly for exerting an active pushing effect on the bridge frame is further mounted between the cutter suction dredger body and the bridge frame. According to the active load adjusting bridge system for the cutter suction dredger, active load control is applied in a hard soil excavation scene, so that the reamer assembly can effectively feed in a water bottom mud surface, smooth construction is achieved, and excavation construction efficiency is guaranteed.

The invention discloses a mineral hydraulic lifting system and method for deep-sea mining, and relates to the technical field of deep-sea mining, the mineral hydraulic lifting system for deep-sea mining comprises a water surface supporting platform, a slurry pump set, a drill rod, a marine riser, an underwater workstation and a top driving part, the upper end of the water surface supporting platform is provided with the slurry pump set and the top driving part; one end of the drill rod is in transmission connection with the top driving part, the other end of the drill rod penetrates through the water surface supporting platform, the drill rod is sleeved with a marine riser, an annular cavity is formed between the drill rod and the marine riser, and the lower ends of the drill rod and the marine riser are connected with the underwater workstation. A power device and parts of the lifting system are arranged on the water surface, pipe fittings which are connected between the water surface supporting platform and the underwater work station and are only provided with marine risers and drill rods are convenient to control and maintain, the number of underwater equipment is reduced, high-power electrical equipment is reduced, and related power, control and accessory parts can be greatly optimized; the use risk of underwater equipment is reduced, and the reliability of the system is improved.

The embodiment of the invention provides an intelligent dredging method, device and equipment for a trailing suction dredger with the maximum yield as the target and a storage medium. The method comprises the steps that a mud pump flow yield curve at the current mud pump rotating speed is obtained; the earth angle of the drag head movable cover is controlled by taking the mud density corresponding to the highest point of the mud pump flow yield curve as a target; after the optimization of the angle to ground of the drag head movable cover is finished, if the instantaneous pump passing yield of the dredge pump still cannot reach the maximum pump passing yield corresponding to the highest point of the flow yield curve of the dredge pump, the rotating speed of the dredge pump is adjusted, and the adjusted rotating speed of the dredge pump serves as the current rotating speed of the dredge pump again; and continuously executing the step of acquiring the flow yield curve of the dredge pump at the current dredge pump transfer speed until the difference value between the instantaneous over-pumping yield and the maximum over-pumping yield of the dredge pump is smaller than or equal to a preset threshold value. According to the method, on the premise that the slurry conveying efficiency is guaranteed, the instantaneous pump passing yield can be maximized.

The invention discloses an underground coal mine large-diameter directional drilling system and a hole forming method. The system comprises a directional drill bit, a single-bend screw motor, a non-magnetic drilling tool, a packing cross short section, a double-wall drilling rod and a double-channel water injection and slag discharge device which are connected in sequence, and a mud pulse measurement-while-drilling instrument is arranged in the non-magnetic drilling tool; the packing crossed short section comprises a short section body and a limiting connector which are connected, and the outer wall of the short section body is sleeved with a sliding sleeve. A double-wall drill rod local reverse circulation mode is adopted for deslagging, compared with a conventional direct circulation mode, the circulating water amount needed for deslagging is greatly reduced, the water supply and pollution discharge requirements of a directional drilling site are greatly reduced, the rated discharge capacity and power of a matched slurry pump are greatly reduced, circulating water flows in an annular channel and a center channel of the double-wall drill rod, and the water supply efficiency is greatly improved. The overflow section is not influenced by the hole wall stratum, the reverse circulation flow deslagging efficiency is high, the cleaning effect in the hole is good, and the technical problems that the amount of circulating flushing liquid needed by a conventional large-diameter directional hole drilling system is large, and the hole wall stability maintaining capacity is poor are solved.

The invention provides a hydraulic engineering desilting device convenient to clean, and relates to the technical field of hydraulic engineering desilting, the hydraulic engineering desilting device convenient to clean comprises a main supporting frame, a main slurry conveying pump, side reamer supports and a side connecting frame, the lower portion of the main supporting frame is fixedly connected with the main slurry conveying pump, and the side reamer supports are arranged on the two sides of the main supporting frame; the upper portion of the side reamer support is in axial sliding connection with the side connecting frame, the upper portion of the main supporting frame is rotationally connected with a lower connecting rotating frame in the circumferential direction, the main supporting frame is fixedly connected with an upper sliding groove disc above the lower connecting rotating frame, and outer arc-shaped sliding grooves are formed in the two sides of the upper sliding groove disc. The main supporting frame is rotationally connected with an upper connecting rotating frame in the circumferential direction above the upper sliding groove disc. The distance between the side reamer support and the main slurry conveying pump is changed, the situation that machine halt is caused due to the fact that stones are clamped between the main slurry conveying pump and the reamer rotating head is reduced, and the problem that due to the design of the fixed distance between the reamer and the suction opening, the stones with the large particle size are prone to being clamped between the reamer and the suction opening, and equipment overload machine halt is caused is solved.

The invention discloses an automatic hard well shut-in method and system integrated with a petroleum drilling machine control system, and relates to the technical field of petroleum drilling machine well control. According to the method, the drilling working condition is monitored in real time, an overflow trigger index is calculated, the overflow risk in a shaft is judged, and a hard well shut-in process is started after an alarm is given; the position of a hook and the position of a drill rod joint are monitored in real time, a winch safety stop index is calculated, whether the operation state of the winch is safe or not is judged, the hook is automatically moved to the optimal stop point, and the winch is braked; top drive and slurry pump linkage control is started, a top drive and slurry pump linkage control coefficient is calculated, whether the static working condition before well control is met or not is judged, and equipment is stopped or a strategy is executed accordingly; monitoring the action of the blowout preventer and the state of the hydraulic system, calculating the consistency index of the action of the blowout preventer, judging whether the action of the blowout preventer meets the well shut-in requirement or not, and giving a strategy if the action does not meet the well shut-in requirement; real-time judgment of the overflow risk and automatic hard shut-in of the well can be achieved, the safety of the well mouth is guaranteed, and the risk of manual misoperation is reduced.

The invention is suitable for the technical field of engineering investigation, and provides an engineering investigation digital drilling machine based on the Internet of Things sensing technology and a big data service system.The digital drilling machine comprises a drill tower, a hydraulic standard penetration piece, a slurry pump, an integrated operation table, a double-clamping structure, a power head, monitoring equipment and other assemblies; linkage and data interaction of all the assemblies are achieved through a controller special for engineering machinery. The big data service system covers three aspects of a data architecture, a core algorithm and a security mechanism, the data architecture comprises an edge computing layer and a cloud analysis layer, the core algorithm comprises a drilling efficiency prediction model and equipment health degree evaluation, and the security mechanism comprises data encryption and access control. The big data service system provides intelligent decision support and service for engineering investigation, and the engineering investigation efficiency and quality are effectively improved.

The utility model relates to a desilting device, in particular to a desilting device for hydraulic engineering. The utility model provides a desilting device for a water conservancy project, which can automatically smash silt. The desilting device for the water conservancy project comprises a mounting shell, a servo motor, a connecting frame, a spiral material conveying plate, a material collecting cavity, a guide pipe and a mud pump, the servo motor is mounted on the upper portion of the mounting shell, the spiral material conveying plate is fixedly connected to an output shaft of the servo motor and rotates in the mounting shell, and the guide pipe is fixedly connected to the output shaft of the servo motor. A connecting frame is fixedly connected to the bottom of the mounting shell, a guide pipe is connected to the right side of the upper portion of the mounting shell, a slurry pump is mounted in the middle of the guide pipe, and the stirring paddle is fixedly connected to an output shaft of the servo motor and located below the spiral conveying plate. And through the servo motor, the output shaft of the servo motor drives the stirring paddle to rotate, and then the stirring paddle can smash the sludge, so that the sludge is conveniently discharged, and the sludge is prevented from blocking the guide pipe.

The utility model belongs to the technical field of open caisson sinking, and relates to a cutter suction dredging device suitable for a soft soil layer in an open caisson sinking process, which is characterized by comprising a water inlet pipe, a mud outlet pipe and a dredging system, the dredging system comprises a hoisting frame, a winch, a mud pump, an asynchronous motor and a reamer, the winch is mounted on the hoisting frame, and the mud pump is mounted on the hoisting frame. A slurry pump is installed on a steel wire rope driven by the winch, and reamers driven by an asynchronous motor are installed on the periphery of the slurry pump through an installation frame. A water inlet pipe is installed at the upper end of the mud pump in a limiting mode, and a mud outlet of the mud pump is connected with a mud outlet pipe. In the sinking process of the open caisson, if the open caisson encounters a soft soil layer, the soft soil layer can be changed into mud through water inflow of the water inlet pipe and stirring of the reamer, and then cutter suction dredging operation is carried out. The problem that a traditional sinking mode is not suitable for a soft soil layer is solved.

The invention discloses a novel multi-source disturbance quantity and multi-pump flow matching analysis method for a deep-sea mining vehicle. The method comprises the following steps that the lower limit value of the water diversion quantity at a collection head gap is set; determining the upper limit value of the flow of the mixture absorbed by the dredge pump; determining a lower limit value of the flow of the mixture absorbed by the primer pump; determining the lower limit value of the flow of the mixture absorbed by the dredge pump; determining the upper limit value of the flow of the mixture absorbed by the primer pump; according to a mass conservation method, the lower limit value of the water diversion amount at the gap of the collection head, the upper limit value and the lower limit value of the flow of the mixture absorbed by the dredge pump and the upper limit value and the lower limit value of the flow of the mixture absorbed by the water diversion pump, the water diversion amount at the gap of the collection head is drawn; and determining the flow range of the mixture absorbed by the dredge pump and the flow range of the mixture absorbed by the primer pump according to an envelope diagram of the flow of the mixture absorbed by the dredge pump and the flow range of the mixture absorbed by the primer pump. The defect that the pump flow matching performance of the mining vehicle is poor is overcome.

The utility model relates to the technical field of underground coal mine sedimentation tank dredging equipment, in particular to a comprehensive dredging device for an underground coal mine sedimentation tank and the underground coal mine sedimentation tank. The automatic dredging device for the underground settling pond of the coal mine comprises a transfer belt conveyor, a centrifugal machine, a mud scraper, a submersible mud pump and a mud pond. The solid phase separated by the centrifugal machine is discharged to the transfer belt conveyor and is output outwards through the transfer belt conveyor; the mud scraper comprises a tank body, a scraper assembly and an inclined plate sedimentation assembly, the tank body is provided with a feed port and a mud outlet, the scraper assembly and the inclined plate sedimentation assembly are arranged in the tank body, and the scraper assembly is used for scraping sediments in the tank body to the mud outlet; the mud pool is communicated with the mud outlet, and the submersible mud pump is arranged in the mud pool and conveys sediment in the mud pool into the centrifugal machine. The inclined plate sedimentation assembly can improve the sedimentation rate of fine particles in ore pulp. The mud scraper, the centrifugal machine, the mud pool, the submersible mud pump and the transfer belt conveyor are matched, and automatic sediment treatment can be achieved.

The invention relates to a deep-water under-salt drilling wellbore pressure fine regulation and control system and method, and belongs to the technical field of oil and gas development drilling and completion engineering. The system comprises a wellbore inlet which is sequentially connected with an inlet displacement meter, a drilling fluid pump and a drilling fluid tank outwards, and a wellhead outlet is sequentially connected with a wellbore pressure regulation and control device, a slurry pump, an outlet flow meter and a slurry pool; the inlet displacement meter, the outlet displacement meter and the shaft pressure regulation and control device are all connected to the fine pressure control drilling system, the safety equivalent drilling fluid density of salt bed open hole sections of different depths can be obtained by accurately calculating the shaft temperature field and the equivalent circulation density and considering the influence of rock stratum creep characteristics on the drilling fluid density and the creep diameter shrinkage rate, and the drilling fluid density of the salt bed open hole sections of different depths can be obtained. And the wellhead return pressure is adjusted in real time, so that the precise regulation and control of the wellbore pressure are realized.

The invention provides a self-adaptive control method and system for equipment operation parameters, and relates to the technical field of self-adaptive control of oil field operation parameters, and the method comprises the steps: obtaining multi-source data such as structure displacement, process state parameters, component analysis data and fluid performance parameters to evaluate a current process stable state, and outputting a state quantized value; then, in combination with the component analysis data, the state quantized value and the current value of the fluid performance parameter, a pre-trained decision model is used for analysis and decision making, and an expected target value which the fluid performance parameter should reach is generated; and finally, the expected value serves as a leading target, feedback of process state parameters is sensed in real time, operation parameters of key process execution mechanisms such as a drilling machine and a slurry pump are dynamically adjusted through a self-adaptive control algorithm, conversion from passive response to active optimization in the drilling process can be achieved, and the well wall stability and the drilling efficiency are effectively improved.

The invention relates to the technical field of steel wear-resistant materials, in particular to an anti-scouring dredge pump composite impeller and a preparation method thereof. The dredge pump composite impeller comprises a dredge pump impeller base body and a ceramic particle composite area, wherein the ceramic particle composite area is arranged in a local easy-to-wear area of the tip end of the dredge pump impeller base body; and the ceramic particles adopted in the ceramic particle composite area are ZTA ceramic particles with Al2O3 and ZrO2 complex phases. The service life of the composite impeller of the dredge pump is more than two times that of a high-chromium wear-resistant cast iron impeller, the hardness is high, the service life of the impeller can be remarkably prolonged, and the slurry conveying efficiency of the dredge pump can be remarkably improved.

Herein are described methods and systems for characterizing noise and noise level in pressure measurements in a downhole pressure testing operation in formation testing while drilling. The pressure measurements are acquired using a formation testing tool disposed on a drill string. The methods include drilling a borehole, extending the one or more probes into an inner surface of the borehole, performing a pressure testing operation with a first mud pump rate, wherein the pressure testing operation comprises a drawdown period and a build up period, decreasing the first mud pump rate to a second mud pump rate while measuring pressure during the build up period, decreasing the second mud pump rate to a third mud pump rate while measuring pressure during the build up period, and calculating a noise associated with pore pressure measurements during the first pressure testing operation.

The embodiment of the invention provides a riverway dredging flow control method and system, and relates to the technical field of riverway dredging flow control, the method comprises the steps that operation data of a riverway dredging system are collected, and the operation data comprise a flow meter feedback value, mud pump operation parameters, pipeline pressure, valve opening and mud concentration; based on the operation data, the abnormal types of the river dredging system are recognized, and the abnormal types comprise flowmeter measurement errors, valve mechanical response hysteresis and slurry rheological characteristic anomalies; and adjusting a control strategy according to the exception type. The river dredging operation efficiency, the equipment safety and the environmental protection level can be improved.