184 results about "Petroleum industry" patented technology

The invention discloses a petroleum industry personnel behavior safety video monitoring system based on artificial intelligence, and the system comprises a front-end equipment layer which is used for collecting physical environment data; the edge computing layer is deployed on a local server of a factory and is used for preprocessing and preliminarily analyzing the data acquired by the front-end equipment layer; the cloud analysis layer is used for carrying out deep analysis on the data uploaded by the edge calculation layer by utilizing deep learning and natural language processing technologies; the cloud analysis layer can integrate data from the front-end equipment layer, the edge computing layer and the cloud analysis layer; and the application service layer is used for presenting the result of the cloud analysis layer to a user in a user-friendly manner. According to the method, video spatio-temporal features are extracted through the CNN-BiLSTM fusion model, risk behaviors such as no helmet wearing and illegal operation are accurately identified, and the false alarm rate is reduced; the NLP analyzes the work order to construct the knowledge graph, the knowledge graph is matched with the video behavior event in a space-time manner, the risk score is dynamically evaluated, and the comprehensive early warning accuracy is improved.

The invention relates to the field of petroleum industry fracturing operation, and discloses a filtering device, a valve and a fracturing fluid tank. The filter device comprises a filter cartridge, a cleaning assembly and a storage assembly, wherein a filter screen is arranged in the filter cartridge; the cleaning assembly comprises a detection part, a cleaning part and a loosening part which are arranged in the filter cartridge, the detection part is used for detecting the pressure of fluid flowing through the filter cartridge, and the cleaning part cleans the filter screen when it is detected that the pressure of the fluid flowing through the filter cartridge is larger than first preset pressure; when it is detected that the pressure of the fluid flowing through the filter cartridge is larger than second preset pressure, the loosening piece acts on the filter screen so that impurities blocked on the filter screen can be loosened; the storage assembly comprises a storage box arranged at the bottom of the filter cartridge, and the storage box is used for receiving impurities cleaned by the cleaning part. Based on the filtering device provided by the invention, the phenomenon that the liquid supply channel is blocked due to impurity accumulation can be avoided, and the fluid conveying effect is ensured.

The invention provides an oil well oil pumping speed curve optimization method, system and equipment and a storage medium, and belongs to the technical field of petroleum industry, a plunger motion curve is expressed as a trapezoidal motion curve by establishing a relational expression of pump efficiency and plunger motion speed, a plunger motion equation is expressed in a Fourier series expansion form, and the pump efficiency and the plunger motion speed are optimized. And determining constraint conditions according to oil well swabbing parameters to obtain an optimized plunger motion equation. According to the optimized oil pumping speed curve, the plunger can move at a constant speed for a long time in the up-down stroke, the good inlet and outlet instantaneous displacement can be maintained in the swabbing process, the oil well pump efficiency is improved, meanwhile, the unstable factor of sudden acceleration change of a trapezoidal motion curve is overcome, impact is effectively reduced, and motor operation is more stable.

The invention relates to the field of drilling in the petroleum industry, and discloses a composition for a microbial stabilizer, the microbial stabilizer and application thereof, and a water-based drilling fluid and application thereof. The composition contains a thermophilic strain, a nutrient solution for the thermophilic strain, urea and a calcium source, the preservation number of the thermophilic strain is 1K04190; the content mass ratio of the thermophilic strain to the nutrient solution for the thermophilic strain to the urea to the calcium source is 1: (2-10): (1-10): (1-4); the OD600 (optical density 600) of the thermophilic strain is 0.4 to 0.6. The microbial stabilizer obtained by adopting the composition for the microbial stabilizer can effectively generate CaCO3 precipitates with high mechanical strength, can play a role in adjusting the rheological property of drilling fluid after being applied to the drilling fluid, can reduce the leakage of the drilling fluid in the drilling work, plays a role in stabilizing a well wall, and has the advantages that the drilling fluid is prevented from being damaged, and the service life of the drilling fluid is prolonged. Meanwhile, the mechanical strength of the rock can be obviously improved.

The invention provides a stable foam control agent with rapid dispersion, which is mainly used in the petroleum industry and has the advantages of safety, stability and rapid dispersion. Compared with the traditionally used polyether ester, the selected fatty acid ester compound has longer carbon chain and better performance in the aspect of lasting foam breaking; the rapid dispersibility of the foam control agent is improved by adjusting the ratio of the ester compound to the wetting penetrant; the coating does not contain a solvent, is safer and more stable, and is suitable for long-term storage.

The invention provides a process and a method for phase equilibrium regulation and control in petroleum industry, main components of petroleum raw materials are determined through raw material analysis, and pertinence and effectiveness of regulation and control are ensured. According to the invention, the mixed materials are put into the reaction kettle for phase equilibrium regulation reaction, and the reaction temperature, pressure and time are strictly controlled, so that the reaction process is stable and controllable, and the product quality is improved. The specific steps for raw material analysis by using the gas chromatograph-mass spectrometer are detailed and accurate, and the specific steps for determining the regulation and control target define the specific numerical values of the light oil yield and the oil product quality index, so that the regulation and control are more operable. Temperature, pressure and phase composition parameters of a reaction system are monitored in real time through online monitoring equipment, abnormity is found and adjusted in time, and it is ensured that the regulation and control effect is optimal. A distillation or extraction method is adopted for product separation, and proper separation conditions are selected according to target components, so that effective separation and purification of the product are realized.

The utility model relates to the technical field of oil industry gate valves, in particular to an oil industry gate valve with a wear-resistant strengthening structure, which comprises a valve casing, delivery pipes are welded on two sides of the valve casing, a blocking component is arranged on the inner side of the valve casing, a support rod is fixedly connected to the top end of the valve casing, and an electric cylinder is fixedly connected to the top end of the support rod through a mounting seat. The blocking assembly comprises a sealing ring, the sealing ring is fixedly bonded to the inner side of the valve shell, a gate plate is embedded in the inner side of the sealing ring, a water cavity is formed in the top of the inner side of the valve shell, mounting grooves are formed in the two sides of the bottom end of the water cavity, protection mechanisms are fixedly connected to the inner sides of the mounting grooves, and a filter screen is fixedly connected to the middle of the inner side of the conveying pipe. The filter screen, the inner side of the valve shell and the flashboard can be washed at the same time through water flow, in this way, the cleaning difficulty is lowered, the cleaning efficiency is improved, and the service life of the flashboard is prolonged.

The invention relates to the technical field of drilling tool dismounting and mounting equipment in the petroleum industry, in particular to a torque control method for a punching and buckling oil cylinder applied to a driving clamp and the driving clamp, and the torque control method for the punching and buckling oil cylinder applied to the driving clamp comprises the following steps that the first extension length L1 and the second extension length L2 are obtained; calculating a first included angle alpha 1 and a first real-time force arm H1 according to the L1, pre-stored R1 and r1 and a first preset rule; according to the same rule, a second included angle alpha 2 and a second real-time force arm H2 are calculated according to L2, R2 and r2; acquiring a first rodless cavity pressure intensity P11, a second rod cavity pressure intensity P22, a first rod cavity pressure intensity P12 and a second rodless cavity pressure intensity P21; according to the parameters and the pre-stored sectional area of each cavity of the oil cylinder, the current torque M is calculated according to a second preset rule; and according to the relation between the current torque M and the preset target torque, the output torque of the first punching and buckling oil cylinder and the output torque of the second punching and buckling oil cylinder are controlled. The invention aims to solve the problems of torque overshoot and overlong screwing-on and screwing-off time in the prior art.

The utility model discloses a rock core shear strength tester for the petroleum field, which comprises a shear shaft, a base body and an upper cover detachably connected onto the base body. A first arc-shaped groove is formed in the top surface of the base body, and a first shearing hole is formed in the groove bottom of the first arc-shaped groove; a second arc-shaped groove is formed in the bottom surface of the upper cover, a second shearing hole is formed in the top of the second arc-shaped groove, the first shearing hole and the second shearing hole are both matched with the shearing shaft, and the second shearing hole penetrates through the upper cover; when the upper cover is connected with the base body, the first arc-shaped groove and the second arc-shaped groove are spliced into a cylindrical cavity, and the first shearing hole and the second shearing hole are opposite to each other; a third arc-shaped groove is formed in the bottom end of the shearing shaft; and the inner diameters of the first arc-shaped groove, the second arc-shaped groove and the third arc-shaped groove are equal. The rock shear strength testing device is used for solving the problem that a rock shear strength testing device in the prior art is poor in adaptability to rock cores in the petroleum industry, and the purposes of improving the utilization rate of the rock cores, reducing waste of the rock cores and the like are achieved.

The invention belongs to the technical field of petroleum industry, and relates to a reverse demulsifier as well as a preparation method and application thereof. The reverse demulsifier comprises a structural unit derived from a cationic unsaturated monomer, a structural unit derived from an acrylamide monomer, a structural unit derived from a polyether monomer with a double-bond-containing end group and a structural unit derived from a hydrophobic monomer with a double-bond-containing end group. Based on the total weight of all the structural units in the reverse demulsifier, the content of the structural unit derived from the cationic unsaturated monomer is 30-65 wt%, the content of the structural unit derived from the acrylamide monomer is 10-45 wt%, the content of the structural unit derived from the polyether monomer with the end group containing double bonds is 5-22 wt%, and the content of the structural unit derived from the polyether monomer with the end group containing double bonds is 5-20 wt%. The content of the structural unit derived from the hydrophobic monomer containing double bonds at the end group is 2-15 wt%. The reverse demulsifier disclosed by the invention has the characteristics of high dehydration speed, clear dehydrated water, suspended solid particles and low oil content.

The invention belongs to the technical field of recovery of floating oil in sewage tanks in the petroleum industry, and particularly relates to a pumping device for floating oil in a sewage tank and a using method. In a working state, the floating plate drives the device to float along with the height of a page, the driving motor is started, the driving motor drives the rolling wheel to rotate, floating oil attached to the rolling wheel flows into the oil storage tank through the penetrating opening through the scraping plate, recovery of the floating oil accumulated on the liquid level in the sewage tank is completed, and the device is not limited by fluctuation of the liquid level in the tank; the two floating plates can float along with the height of the liquid level, oil slick is forcibly sucked, and the device has the advantages of being simple in structure, small in equipment investment, good in oil collecting effect, capable of saving manpower, reducing labor intensity and reducing the dirty oil content of injected water and capable of providing qualified sewage for next-step sewage treatment.

A carbon dioxide injection sealing assembly belongs to downhole operation tools in the petroleum industry, is used for downhole carbon dioxide injection, and particularly relates to a carbon dioxide injection sealing assembly structure of a salvageable intubation bridge plug. The utility model provides a carbon dioxide injection sealing assembly which can solve the problems that after an underground tool is used for injecting carbon dioxide, the underground tool cannot be pulled out, and long-term sealing is achieved. The device is characterized in that an upper joint is in threaded connection with an insertion tube, a back cap is in threaded connection with a sealing cylinder, a gasket, a first combined seal, a baffle ring and a second combined seal are arranged in the sealing cylinder, and a guide sleeve is in threaded connection with the sealing cylinder. The upper pressing ring is in threaded connection with the sealing cylinder. The rubber cylinder, the spacer ring and the pressing ring are sleeved on the rubber cylinder shaft; and the rubber cylinder shaft is in threaded connection with the sealing cylinder.

The present application belongs to the technical field of automatic workover in oil production engineering of petroleum industry, and discloses a kind of auxiliary lifting device and lifting method of automatic operation oil pipe under pressure, device includes derrick, hydraulic clamp, manipulator, auxiliary lifting device, lifting seat and control system, lifting seat and hydraulic clamp are installed on derrick, auxiliary lifting device is installed on lifting seat, the upper portion of auxiliary lifting device is equipped with clamping structure, clamping sensor is equipped on clamping structure, lifting structure is connected on the both sides of auxiliary lifting device, low sensor, mid sensor and high sensor are arranged on lifting structure.The method is that control system completes automatic auxiliary lifting to pipe column according to sensor signal, and real-time monitoring lifting position, improve the reliability of operation, the whole process is automatically completed by control system, workers only need remote monitoring, without direct participation, exclude the security risk produced by human factor, reduce the generation of oil pipe drop, personnel injury accident.

The utility model relates to the technical field of pressure control in the petroleum industry, in particular to a constant pressure type multi-stage pressure relief protection skid device. According to the technical scheme, a first high-pressure T-shaped connector, a second high-pressure T-shaped connector and a third high-pressure T-shaped connector are installed between a high-pressure straight pipe and the outlet end of the high-pressure straight pipe, an outlet in the upper end of the first high-pressure T-shaped connector is connected with a first plug valve and a low-order safety valve, and an outlet in the upper end of the second high-pressure T-shaped connector is connected with a second plug valve and a middle-order safety valve. An outlet in the upper end of the third high-pressure T-shaped connector is connected with a third plug valve and a high-order safety valve, and the outlet ends of the low-order safety valve, the middle-order safety valve and the high-order safety valve are connected to a low-pressure straight pipe through an elbow assembly and a straight pipe assembly respectively. The utility model has the beneficial effects that gradient pressure protection is realized, and the problem of protection failure of a single safety valve is avoided; impact on the pipeline caused by sudden pressure drop is also prevented, and the service life of equipment is prolonged; the durability of the device is improved, the potential safety hazard is reduced, and the maintenance cost is reduced.

The present invention relates to the technical field of oil pipeline detection in the petroleum industry, and is an intelligent detection device for lifting and lowering oil pipelines and a detection method thereof. The device comprises a hollow cylindrical shell, on which an oil pipeline passage extending vertically is provided, the oil pipeline passage being concentric with the cylindrical shell, and a plurality of detection modules being evenly arranged around the oil pipeline passage in the cylindrical shell, with a data acquisition and control system being commonly connected to the plurality of detection modules. The device enables real-time detection of the oil pipeline condition, thereby reducing the need for subsequent oil pipeline maintenance work. The device can promptly detect damaged oil pipelines with potential safety hazards, ensure the integrity of the oil pipelines, and avoid engineering accidents caused by oil pipelines not meeting requirements. The device not only overcomes the limitations of single oil pipeline detection methods, namely damage and length, but also improves overall detection efficiency through collaborative data analysis, providing a more comprehensive technical solution for oil pipeline quality assessment, which is of great significance to the sustainable development of oil and gas fields and the safe and efficient production of oil and gas wells.

The invention relates to the technical field of petroleum pipes in the water and petroleum industry, in particular to a U-shaped thermos bottle type petroleum casing pipe for a geothermal well, which comprises an inner-layer casing pipe, an outer-layer casing pipe and a vacuum module. The inner-layer sleeve and the outer-layer sleeve are both of a hollow cylindrical structure, the outer-layer sleeve is connected with the inner-layer sleeve through two annular connecting pieces to form a vacuum interlayer, the outer wall of the outer-layer sleeve is provided with a through hole and an NPT bolt, the NPT bolt is used for vacuumizing the vacuum interlayer, the outer wall of the outer-layer sleeve is provided with a vacuum degree module, and the vacuum degree module is connected with the outer-layer sleeve. The vacuum degree module comprises a shell, an air bag, a sealing ring, a spring and a vacuum ruler and is used for monitoring the vacuum degree of the vacuum interlayer in real time. According to the thermos bottle type petroleum casing pipe for the U-shaped geothermal well, the design is similar to a thermos bottle, heat conduction can be effectively reduced, the heat preservation effect of the inner-layer casing pipe is improved, meanwhile, the monitoring module is arranged, the thermos bottle type petroleum casing pipe is suitable for the high-temperature geothermal environment, and the exploitation efficiency and safety of the geothermal well are improved.

The application relates to the field of drilling fluids in the petroleum industry, and discloses an amide polymer, which contains structural unit A, structural unit B, structural unit C and structural unit D; the structural unit A is a structural unit with the structure shown in formula (1); the structural unit B is a structural unit with the structure shown in formula (2); the structural unit C is a structural unit with the structure shown in formula (3); and the structural unit D is a structural unit with the structure shown in formula (4). The amide polymer has excellent temperature resistance and calcium resistance, and has excellent filtration reduction performance when applied to drilling fluids.

The utility model relates to a plug valve for blowout prevention, belong to petroleum industry drilling, well repairing technical field, including plug valve body and the ball valve switch of setting in the middle part of plug valve body, the outside wall of plug valve body is equipped with the clamping body, the clamping body sets up the top of ball valve switch to make the operator hand -held clamping body installs plug valve in the well mouth. The utility model discloses the clamping body on the outside wall of plug valve body sets up, the clamping body sets up the top of ball valve switch, namely, close to the upper part of plug valve body sets up, to make the operator hand -held clamping body installs plug valve in the well mouth, the installation of plug valve is convenient, avoids the smooth surface of the outside wall of plug valve body and makes the operator hand -held when easy to slip and causes the safety accident, provides the clear hand -held force point for plug valve, improves plug valve installation efficiency and solves the corresponding security risk simultaneously.

The present invention discloses a combustible casing for an underground coal gasification channel and a preparation method thereof, belonging to the technical field of petroleum industry pipe manufacturing. The preparation process of the combustible casing is simple. The combustible casing is composed of 0.2-1.0Zr, 1.0-5.0Zn, 1.0-5.0Al, 7.0-13.0Gd, 3.0-6.0Y, 3.0-6.0Nd, and the remainder being Mg and impurities in mass percentage. After being cast and turned into an ingot, the ingot is solution treated and extruded, and then subjected to aging treatment. Finally, the combustible casing is prepared, which has sufficient space for normal operation and has the characteristic of being burned and consumed above a specific temperature. The casing has a rationally designed alloy element composition, low density, high specific strength, excellent room temperature and high temperature strength, and the characteristics of being burned and consumed above the specific temperature.

This article pertains to the petroleum industry, specifically relating to a method, device, and equipment for overflow risk early warning based on single-hole gas monitoring. The method includes: real-time collection of drilling data, including drill bit position, well depth, total hydrocarbon content, and drill string height; determining the drill bit position when the drill string is pulled up based on the collected drilling data; determining the location data of the risky well section and the location data of the first section to be monitored based on the drill bit position and single drill string length; determining the location data of a single connecting section based on the location data of the single connecting section and the risky well section; monitoring for single-hole gas anomalies based on total hydrocarbon content data obtained at the location of the first section to be monitored; and determining whether to send an overflow risk warning based on the single-hole gas anomaly. This article solves the problems of high cost and poor effectiveness in overflow risk monitoring during drilling.

The invention discloses a petroleum hydrocarbon viscosity prediction and uncertainty quantification method based on machine learning, which can improve the precision and adaptability of petroleum hydrocarbon pure component and mixture viscosity prediction, and realizes uncertainty quantification of a prediction result through a Delta method and conformal prediction. And a reliable support is provided for viscosity evaluation and risk control under variable working conditions in the petroleum industry.

The invention relates to the field of drilling fluids in the petroleum industry, and discloses an amide polymer which contains a structural unit A, a structural unit B, a structural unit C and a structural unit D, the structural unit A is a structural unit with a structure as shown in a formula (1); the structural unit B is a structural unit with a structure as shown in a formula (2); the structural unit C is a structural unit with a structure as shown in a formula (3); the structural unit D is a structural unit with a structure as shown in a formula (4). The amide polymer provided by the invention has excellent temperature-resistant and calcium-resistant effects, and has excellent filtrate loss reduction performance after being applied to the drilling fluid. # imgabs0 #

The utility model discloses a metal winding wire of a petroleum sand prevention filter screen pipe, which comprises a first winding wire connecting edge, a second winding wire connecting edge, a third winding wire connecting edge, a fourth winding wire connecting edge, a fifth winding wire connecting edge, a sixth winding wire connecting edge and a seventh winding wire connecting edge, the second wire winding connecting edge and the third wire winding connecting edge are oppositely connected and arranged at the two ends of the first wire winding connecting edge, and the fourth wire winding connecting edge and the fifth wire winding connecting edge are connected to the other ends of the second wire winding connecting edge and the third wire winding connecting edge respectively. The other end of the fourth wire winding connecting edge and the other end of the fifth wire winding connecting edge incline inwards in the opposite direction and are connected with a sixth wire winding connecting edge and a seventh wire winding connecting edge respectively, and the other end of the sixth wire winding connecting edge and the other end of the seventh wire winding connecting edge incline inwards in the opposite direction and are connected to form a tip welding end. The filter is suitable for drilling filtration in the petroleum industry and the natural gas industry, has higher anti-clogging performance, and meets the operation requirement of high filtration capacity in the natural gas industry.

The utility model discloses a petroleum industry gate valve with a valve seat convenient to replace, which relates to the field of petroleum industry gate valves, and is characterized by comprising a valve body and a valve rod supporting part which are connected through a flange, a valve rod is arranged on the valve rod supporting part, and the bottom of the valve rod is connected with the valve seat through a quick release assembly. The quick-release assembly fixes the valve seat in a mode of first limiting and then fixing, and the quick-release assembly has the advantages that when the valve seat is damaged and needs to be detached, flange fixation between the valve body and the valve rod supporting part is removed, the valve rod supporting part is detached from the valve body, then the valve seat can be pulled out of the valve body, and then fixation of the quick-release assembly to the valve seat is removed; the damaged valve seat is detached, then a new valve seat is installed, the valve seat is installed in the mode that the valve seat is limited firstly and then fixed through the quick detaching assembly, the valve seat does not need to be frequently held by hands, more convenience is achieved, tools in the background technology do not need to be used, and the convenience degree of replacement of the valve seat is greatly improved.

The invention provides a bentonite-based metal catalyst for reducing viscosity of thickened oil while drilling as well as a preparation method and application of the bentonite-based metal catalyst, and belongs to the field of oilfield chemistry in the petroleum industry. The preparation method of the catalyst comprises the following steps: hydrating bentonite, dropwise adding a hydrophilic monomer aqueous solution, sequentially adding a reducing agent aqueous solution and an initiator aqueous solution, and reacting to obtain a polymer modified bentonite aqueous phase; dropwise adding a first transition metal ligand solution for reaction; and then adding a second transition metal ligand solution to react. The catalyst disclosed by the invention can be used for efficiently catalyzing and cracking the thickened oil while drilling, so that the efficient viscosity reduction of the thickened oil is realized, and meanwhile, the lasting efficient viscosity reduction effect of the thickened oil can be kept. Moreover, the catalyst and the drilling fluid have good compatibility, negative effects on wall fixing and chip carrying capacity of the drilling fluid are avoided, the catalyst can be blended into the water-based drilling fluid, and chip carrying efficiency, rheological stability and high-temperature adaptability are maintained or enhanced.

The invention belongs to the technical field of drilling fluid chemistry in the petroleum industry, and particularly relates to a high-temperature-resistant viscosity reducer as well as a preparation method and application thereof. The preparation method of the high-temperature-resistant viscosity reducer provided by the invention comprises the following steps: (1) adding vegetable oleic acid and polyethylene polyamine into a reactor, and reacting at a first temperature under the protection of inert gas to obtain a first intermediate; (2) reducing the temperature of the first intermediate to a second temperature, slowly adding anhydride, then heating to a third temperature, and continuously reacting to obtain a second intermediate; and (3) reducing the temperature of the second intermediate to room temperature, adding trimethylchlorosilane, reacting at a fourth temperature, and adding white oil for dilution after the reaction is finished, thereby obtaining the high-temperature-resistant viscosity reducer. The high-temperature-resistant viscosity reducer disclosed by the invention has an excellent temperature-resistant effect, and the viscosity reduction effect of the high-temperature-resistant viscosity reducer on an oil-based drilling fluid can still reach 20% or above after the high-temperature-resistant viscosity reducer is aged at 180 DEG C for 16 hours.

The application discloses a method for preparing copper-steel composite rods at low cost through a vacuum hot pressing furnace, a plurality of graphite holes are processed on a graphite plate, a stainless steel pipe and a copper rod are assembled in each graphite hole, vacuum hot pressing welding is carried out, and a copper-steel composite rod is obtained after cooling; the assembly is that the stainless steel pipe is placed into the graphite hole, the copper rod is placed into the stainless steel pipe, and a guide column with the same diameter as the copper rod is placed at the top end of the copper rod, and the guide column is coaxial with the axis of the copper rod. The method is characterized in that the graphite plate with a plurality of graphite holes is adopted, the stainless steel pipe and the copper rod are assembled into the graphite hole, then the stainless steel pipe and the copper rod are connected through vacuum hot pressing welding, the copper-steel composite rod with stable quality is obtained, the copper-steel composite rod can be prepared in large quantities and at low cost, and the copper-steel composite rod is suitable for preparing copper-steel composite rods required in the fields of military industry, petroleum industry, aerospace industry, ocean industry and nuclear industry.

The invention relates to the technical field of crude oil dehydration data processing in the petroleum industry, and discloses a crude oil electric dehydration high-voltage power supply capable of automatically switching waveforms according to loads and a method. The crude oil electric dehydration high-voltage power supply comprises a temperature sensor arranged on a crude oil dehydration tank, and a voltage sensor and a current sensor which are arranged at the load end of the crude oil dehydration tank; the high-voltage power supply is provided with a digital control unit, the digital control unit is connected with a high-voltage switch, the high-voltage switch is connected with a direct-current generator and a high-voltage pulse generator, the high-voltage pulse generator is connected with a water chain of the crude oil dehydration tank, and the direct-current generator is connected with an electrode of the crude oil dehydration tank. The conductivity of the crude oil or the emulsified liquid is calculated and corrected by combining the collected current, voltage and temperature data, and the digital control unit performs multi-loop control through the conductivity data. According to the invention, the output of alternating current, direct current, pulse and composite electric field can be realized, and the working waveform can be intelligently switched according to the emulsion load characteristic, so that the electric dehydration efficiency and the system energy efficiency are improved.

This invention relates to multiphase suspensions of at least one synthetic water-soluble polymer with a weight-average molecular weight greater than or equal to 1 million Daltons. The invention also relates to the use of such multiphase suspensions in industrial water treatment, municipal water treatment, enhanced oil recovery in mineral deposits, hydraulic fracturing, mining wastewater treatment, drilling operations in civil engineering, drilling operations in the petroleum industry, drilling operations in the natural gas industry, paper or paperboard manufacturing, agriculture, textiles, detergents, or cosmetics.

The disclosure is in the technical field of oil drilling, and in particular relates to a directional well hydraulic clutch drill string full rotation controller, including a rotary assembly, a power assembly and a control assembly. It has two working states: compound drilling and directional drilling. According to the change of the tool face, adjusting the rotation speed of the upper drill string or the displacement of drilling fluid may change the working state of the controller and complete the directional drilling work. The directional well hydraulic clutch drill string full rotation controller has a low cost and high safety and reliability. When oriented, the drill string keeps rotating, which greatly reduces the friction of the drill string system, reduces the stick-slip vibration phenomenon of the drill bit, and thus increases the ROP. The research and development of this technology is of great significance to the petroleum industry.