156results about How to "Extend the pump inspection cycle" patented technology

The invention discloses an intelligent drainage and mining method of a coalbed methane well and intelligent drainage and mining equipment of a coalbed methane well immersed pump. The intelligent drainage and mining method is realized as follows: in the pumping and sucking process, liquid the water quality of which confirms to requirements is supplied for underground liquid by a set flux when a liquid replenishing condition is met so that the height and the descent speed of an underground liquid level as well as the viscidity and the output of the underground liquid all confirms to the normal drainage and mining requirement. The drainage and mining equipment comprises a drainage and a water replenishing device; the water replenishing device consists of a water supply device and a water replenishing pipe, wherein the water supply flow of the water supply device is controlled by a control cabinet, the water replenishing pipe is connected with a water outlet of the water supply device, andthe outlet of the water replenishing pipe is arranged near an underground immersed pump. The intelligent drainage and mining method and equipment can continuously replenish, release and drain liquidaccording to the well condition, thereby solving the problems that a submergible motor is easy to burn out due to deteriorative radiating condition and the pump is easy to clamp and burn due to viscidliquid under the conditions that the liquid supply of a coalbed methane reservoir is lowered, the coal ash content of liquid is increased and the tonnage is lower; in addition, the periods for sand bailing and pump inspection are prolonged.

Provided is an optimum stroke process suitable for a super-low permeability reservoir digital oil pumping unit, belonging to the technical field of oil field digitalization. The process includes that the oil pumping unit stroke is determined and adjusted; and the optimum stroke is automatically found based on the production capacity of an oil well under the condition of guaranteeing the production capacity, the stroke is adjusted to the minimum to achieve the optimum work state, and the self-adjustment and the remote manual adjustment can be realized. The process is particularly suitable for the condition of a super-low permeability oil field low-production well, the low-production well can be continuously pumped, the pump inspection period is prolonged, the service lives of a sucker rod and the oil pumping unit are prolonged, the management is convenient, and the maintenance cost is low. The process can be applied to various types of oil pumping units, such as a compound oil pumping unit or a camber beam variable torque oil pumping unit, the low-stroke operation can be realized, the oil pumping unit stroke is changed by adjusting the variable frequency, the pump fullness and the approximate production capacity are calculated to make the production capacity the largest, and meanwhile, energy can be saved.

The invention relates to pumping unit intelligent multiplier controller. It mainly includes light and strong current parts. Its feature is that dynamic liquid level transducer and polished rod load and displacement transducer are connected with the CPU to realize exact closed-loop control for the pumping well. The light current part includes main control CUP and controlled CPU; the strong current part includes energy feedback, stand by power frequency, and power frequency conversion interlocking parts. The invention can increase pumping well system efficiency, realize its energy saving and consumption reducing, increase both production and income, input-output ratio, and economic benefit, can be suited for oil field electric network specificity and pumping well variability.

The invention relates to an intelligent monitoring device for a screw pump well, which is a high-performance industrial control device combined with optical, mechanical and electronic integration and electronic information and communication technology, and is mainly used for intelligently monitoring oil extraction of the screw pump well in oil field. The intelligent monitoring device mainly comprises a light current part and a strong current part, and is characterized in that the intelligent monitoring device takes connection of parts such as a sensor capable of measuring dynamic liquid level of the screw pump well on line, a sensor capable of measuring the torque and axial force of the screw pump well on line, a sensor capable of measuring electricity using parameters such as running current constantly and a remote wireless communication device and the like with a CPU as a core to realize the effective measurement and intelligent closed-loop control of the screw pump well. The intelligent monitoring device can avoid pump burning phenomenon of a screw pump caused by evacuation through accurate measurement and effective monitoring and dispatching, scientifically make a hot washing system according to wax deposition cause and the like to avoid phenomena such as rod breakage and the like, find eccentric wear problem in time to prolong pump detection cycle, and optimize design of the screw pump well to reasonably determine working parameters and reduce potential safety hazard and the like.

The invention discloses a parameter diagnosis and analysis method for an electric submersible pump well working condition instrument. The method comprises steps as follows: a parameter curve chart of a typical electric submersible pump well fault type is drawn firstly; six groups of parameters including pump inlet temperature, motor winding temperature, pump inlet pressure, pump outlet pressure, leakage current and motor variation frequency are collected by the working condition instrument; pump working condition data are recorded and monitored by a recording instrument in real time; when an electric submersible pump well breaks down, the fault type is determined after comparison of a parameter curve acquired by the working condition instrument and the parameter curve chart. According to the parameter diagnosis and analysis method for the electric submersible pump well working condition instrument, the parameter curve chart of the typical electric submersible pump well fault type is drawn, so that when the electric submersible pump well breaks down again, the fault type can be determined rapidly and accurately, the working condition diagnosis accuracy rate and the fault recovery rate of the electric submersible pump are increased, meanwhile, by virtue of comparison with the chart, pre-warning and treatment are performed in time, the pump inspection period of an oil well is prolonged, the frequency of pump inspection and well repair is reduced, and the purpose of cost reduction and benefit increase is achieved.

The invention provides a long-plunger type dual-barrel coal-dust resistant discharging and extracting pump capable of preventing eccentric wear and coal dust from burying pump, blocking pump and prolonging the pump detection period. The pump consists of a centering body, a pump barrel assembly, a piston assembly, a liquid outlet valve and a liquid inlet valve assembly; a centering locking claw is inserted in a lock sleeve of an upper coupling to realize positioning and sealing of the centering body and avoiding eccentric wear between the plunger and the pump barrel; an internal barrel can prevent the deposited coal dust in the annulus of a bar pipe from entering the gap between the plunger and the pump barrel; the coal dust is dropped back to a tail pipe through the annual cavity between the external barrel and the pump barrel to prevent the coal dust from burying the pump; the structure of the long-plunger short pump barrel can promptly discharge the coal dust in the gap between the plunger and the pump barrel, so as to protect the internal and external working surfaces of the pump barrel and preventing the pump from being blocked; the well liquid stored in the coal-dust resistant tank washes the coal dust in the liquid outlet valve cover and the coal dust deposited at the upper part of the liquid outlet valve through a jet orifice, so as to realize an automatic washing function of the liquid outlet valve and preventing the coal dust from jamming the pump; and a spring is cooperated with a liquid inlet valve ball positioning pin, so that the liquid inlet valve ball can be fast reset, and the pump valve under a low submergence can be realized in smooth on and off.

The invention relates to a downhole three-phase separating device which comprises a two-stage bubble-breaking gas-liquid separating mechanism and cyclone sand settling three-phase separating mechanism. Bubble breaking separation is organically combined with gravity cyclone sand settling three-phase separation, multi-phase flow output liquid is subjected to gas-liquid separation through the bubble-breaking gas-liquid separating mechanism and then subjected to solid-gas-liquid separation through the cyclone sand settling separating mechanism, during the process, heavy solid phase is thrown to the periphery under centrifugal force and gravity and settled to the bottom under gravity, light liquid enters a central pipe, the lightest gas is emitted upwards along gas guide holes to a gas collecting cavity, and three-phase multi-stage separation is achieved. By the downhole three-phase separating device suitable for output liquid with wider vapor liquid ratio range, mud and sand discharge of oil wells can be dealt with effectively, and for oil wells with sufficient stratum liquid supply capacity, pumping effect can be increased, oil well yield can be increased, pump detection cycle can be prolonged, and production effectiveness can be increased.

The invention relates to an intelligent super-long stroke pumping unit which comprises an electric control cabinet, a driving system, a flexible polish rod winding the driving system and a counterweight system connected to the driving system. The output end of the flexible polish rod winds a supporting wheel and is successively connected to a rotary pup joint, a sucker rod, a weighted lever and asuper-long stroke pump. A regional central control room is connected to the electric control cabinet through a remote data wireless bridge, and the electric control cabinet is connected to the drivingsystem through a cable. The intelligent super-long stroke pumping unit is used for improving the stroke of the pumping unit, eliminating the included angle between the flexible polish rod and a hoisting sheave and prolongs the service life of the polish rod, so that a balance weight of the super-long stroke pumping unit is realized. The super-long stroke pumping unit is further energy-saving. Thepump efficiency, yield, annular liquid level position of an oil jacket can be reflected instantaneously by the electric control cabinet. The oil sucking speed or intermittent oil pumping is adjustedautomatically according to liquid supply data to achieve efficient operation, so that purposes of long stroke, low time of strokes, large displacement, intelligent control, optimized oil extraction, extension of periods of replacing a tube rod and examining the pump and remote digitalized control management are achieved.

The invention discloses a novel biological inhibitor for inhibiting activity of sulfate reducing bacteria in an oil well and a use method thereof in the field of production of an oil field. The inhibitor comprises the following components in parts by weight: 100 parts of sodium nitrite, 5-10 parts of sodium nitrate, 0.1-0.5 parts of sodium molybdate and 0.1-0.5 parts of cupric nitrate. The use method comprises the following steps of: (1) determining the concentration contents of SO4<2-> and S<2-> in produced water of the oil field; (2) converting dosage of the inhibitor; (3) preparing an inhibitor mother liquid described in claim 1 according to the dosage of sodium nitrite; and (4) adding the inhibitor mother liquid obtained in the step (3) into the shaft through a sleeve in an adding mode by the sleeve of the oil field. The corrosion rate of the produced water is lowered by using the inhibitor, and the production cost is reduced. Growth of source denitrifying bacteria in the well is activated, so that fast grow of SRB (Sulfate Reducing Bacteria) is effectively inhibited. The inhibitor can be used for inhibiting the activity of sulfate reducing bacteria in the oil well.

The invention discloses a hydraulic drive oil extraction device, and belongs to the technical field of petroleum extraction. The oil extraction device comprises a ground power system (1) and an underground hydraulic drive double-acting oil well pump (2). The ground power system (1) comprises a power hydraulic cylinder (11) and a distribution valve assembly (12). The power hydraulic cylinder (11) and the distribution valve assembly (12) are communicated through a first liquid transport tube (13) and a second liquid transport tube (14). The underground hydraulic drive double-acting oil well pump (2) is provided with a first hydraulic oil outlet channel (21) and a second hydraulic oil outlet channel (22), wherein the first hydraulic oil outlet channel (21) is communicated with the first liquid transport tube (13), and the second hydraulic oil outlet channel (22) is communicated with the second liquid transport tube (14). By the adoption of the hydraulic drive oil extraction device, oil extraction can be conducted in a deviated well and a curved well without a sucker rod, and therefore abrasion of the sucker rod and an oil tube is avoided, accidents of parting of the sucker rod and holing of the oil tube are reduced, and the pump inspection period is prolonged.

The invention relates to a layered pressure control combined drainage-production device for double coal-beds prone to dust and sand spraying. Two drainage pumps are generally combined and used for simultaneous mining of two coal-beds. In case of the coal-beds prone to dust and sand spraying, coal dust and sand enter a suction inlet of the upper drainage pump easily, failure rate of the drainage pump is increased, and workover cycle is shortened. The layered pressure control combined drainage-production device for double coal-beds prone to dust and sand spraying comprises a drainage pump, an oil tube and a sucker rod. The oil tube comprises an upper oil tube and a lower oil tube. A centralizer is disposed on the outer wall of the upper oil tube. The device is characterized in that the drainage pump is a pump for separated zone operation, and a packer and an auxiliary communicating tube are disposed on the lower oil tube. By the use of the pump for separated zone operation, combined mining of the double coal-beds is achieved, the device is more applicable to double coal-beds prone to dust and sand spraying, the failure rate of the pump for separated zone operation is decreased and pump maintenance cycle is prolonged.

The invention provides an echelon releasing method for underground solid anticorrosion and antiscale agents, and the method comprises the following steps of step 1: charging imidazoline inhibitor with a dissolving speed of 0.12g / cm<2>*h, imidazoline inhibitor with a dissolving speed of 0.01g / cm<2>*h, organic phosphonate antiscale agent and clay or kaolin into a tablet press according to a proportion of 0.4: 1.6: 1: 2 to a prepare solid anticorrosion and antiscale agent 1; step 2: charging the imidazoline inhibitor with the dissolving speed of 0.12g / cm<2>*h, the imidazoline inhibitor with the dissolving speed of 0.05g / cm<2>*h, organic phosphonate antiscale agent and clay or kaolin into a tablet press according to a proportion of 0.4: 1.6: 1: 2 to prepare a solid anticorrosion and antiscale agent 2; selecting the solid anticorrosion and antiscale agent 1 when the underground temperature is more than 50DEG C, and selecting the solid anticorrosion and antiscale agent 2 when the underground temperature is less than 50DEG C; and directly charging the solid anticorrosion and antiscale agents before a tubular post is arranged or charging the solid anticorrosion and antiscale agent into a sieve tube, which is hung under a pump, to charge the solid anticorrosion and antiscale agent into an oil well.

The invention discloses a separation and crushing device of downhole pulverized coals of coalbed methane and a method thereof. The settling separation, the crushing and the filtration are performed for the pulverized coals, so that the particle size of the pulverized coals entering a screw pump reaches a normal working range of the screw pump, the accidents of pump blockage, blockage and abrasion caused by the pulverized coals with larger particles entering the screw pump can be effectively prevented, the pump detecting period is prolonged, the development cost of the coalbed methane is reduced, and the blockage of holes of a coalbed methane well by the pulverized coals is prevented; and the device has the advantages of simple structure, convenience for use and high efficiency.

The invention discloses an oil field scale inhibitor including a first scale inhibitor, a second scale inhibitor and a third scale inhibitor, wherein the first scale inhibitor includes: 8-10 parts ofsodium ethylenediamine tetramethylene phosphonate, 5-8 parts of aminotrimethylenephosphonic acid, 3-5 parts of hydroxyethylidene diphosphonic acid, and 5-8 parts of 2-phosphonobutane-1,2,4-tricarboxylic acid; the second scale inhibitor includes: 15-20 parts of maleic anhydride, 5-10 parts of acrylic acid, 5-8 parts of hydroxypropyl acrylate, and 0.5-1 part of ammonium persulfate; the third scale inhibitor includes: 10-12 parts of polyepoxysuccinic acid, 8-10 parts of polyaspartic acid, 5-8 parts of modified imidazolines, 0.5-1 part of modified quaternary ammonium salts, and 0.05-0.1 parts of sodium polyacrylate. The oil field scale inhibitor has stable properties; when being injected into an oil well, the scale inhibitor is slowly released, thus effectively relieving scaling on the wall cylinder and prolonging pump inspection period. The invention also provides a preparation method and a use method of the oil field scale inhibitor.

The invention relate to a scale removing and inhibiting agent for a later-stage oil well with tertiary oil recovery, which is used for removing and inhibiting the scale of the later-stage oil well with tertiary oil recovery and is characterized by comprising the following components in percentage by weight: 15.2-17.8% of hydroxy pentamethylene phosphonic acid, 3.5-4.0% of hydrochloric acid, 3.0-3.2% of hydrofluoric acid, 0.05-0.06% of vitamin C, 21.5-24% of phosphino polymaleic anhydride scale inhibitor, 2.5-3.0% of methenamine, 5.7-6.2% of USP2 with a pentadecyl, 2.5-3.0% of C12-C18 fatty alcohol polyoxyethylene (10) ether, 0. 001-0.0015% of 0.3-0.5% aqueous solution of sodium selenide, 15-20% of methanol and the balance of water, wherein all the components account for 100 percent by weight. The scale removing and inhibiting agent can be added to the later-stage oil well with tertiary oil recovery during the daily maintenance of the oil well to remove or slow down the oil well scale deposition and prolong the pump detection period, 50-75mg of scale removing and inhibiting agent is added to the oil well annulus for the recovery of 1 litter of oil from the oil well, and the pump detection period can be prolonged by 1-2 times.

The invention relates to an oil well anti-eccentric wearing, corrosion-inhibiting and scale-removing agent with reversed phase accumulation, which is applied in corrosion inhibition and scale removal of an oil well. The agent comprises the following components by weight percent: 6.75-8.25% of iturin A, 8.15-11.15% of bacillus licheniformis, 6.25-7.75% of fengycin, 0.01-0.03% of beta-carotene, 0.01-0.03% of vitamin C, 0.5-0.75% of sodium nitrite and the balance of water. The agent has the effects that the prepared scale-removing agent can be applied in the oil well, solve the problems of eccentric wear, corrosion and scale formation of the oil well which contains more than 45% of the water, and prolong the pump detection cycle by 2.15 times on average under the situation of leading the adding amount of the oil well to be 150mg / l.

The embodiment of the invention aims to provide an oil well pump inspection period prediction method and device and a storage medium, and the method comprises the steps: obtaining a sample data set influencing an oil well pump inspection period, the sample data set comprising a plurality of index data influencing the oil well pump inspection period; determining a plurality of principal component data influencing the oil well pump inspection period from a plurality of index data of the sample data set through principal component analysis; performing regression analysis on the plurality of principal component data to obtain a regression analysis result; and predicting the pump inspection period of the oil well according to a regression analysis result.

The invention discloses a method and device for determining the setting depth of a heat preservation, heat insulation and eccentric wear prevention oil pipe, and belongs to the technical field of exploitation in oil fields. The method comprises the steps that oil well foundation data are enrolled according to a geology project firstly, then an oil well shaft temperature field control equation and a well shaft heat-transfer equation are determined, and finally the setting depth of the heat preservation and heat insulation oil pipe is worked out through an iteration method. The method and device for determining the setting depth of the heat preservation, heat insulation and eccentric wear prevention oil pipe have the beneficial effects that by applying the method for determining the setting depth of the heat preservation, heat insulation and eccentric wear prevention oil pipe to two oil wells on site, the temperature of wellheads is increased by 16.4 DEG C averagely, the purposes of improving the temperature of the wellheads of the oil wells and reducing investment of the heat preservation and heat insulation oil pipe are achieved, meanwhile, eccentric wear of the oil wells is prevented, and the application period of an oil well inspection pump is averagely prolonged by 140 days or over. The method and device are used for determining the setting depth of the heat preservation and heat insulation oil pipe.

The invention relates to an underground along-pump monitoring device for coal bed gas water discharge and gas production. The device comprises an underground along-pump monitoring device and a groundcollection transmission system, wherein the underground along-pump monitoring device comprises an underground armored cable, a cable connecting hoop, a transition nipple, an ultrasonic coal powder concentration monitoring nipple, an underground circuit nipple, a pressure temperature monitoring nipple and an in-pump perturbation assembly, wherein the underground along-pump monitoring device is provided with a fixing valve, and is connected under a pump tube of a conventional water discharging pump; the ground collection transmission system supplies electricity for the along-pump monitoring device; the underground circuit nipple controls the pressure temperature monitoring nipple and the ultrasonic coal powder concentration monitoring nipple to monitor the temperature, pressure and coal powder impurity concentration change quantity in a position near the water discharging pump suck-in opening; the dynamic liquid level depth is calculated according to the pressure value; signals treated by an underground main control unit are transmitted to a well field monitoring center; when the coal powder concentration rises, the perturbation impeller rotates; the cyclone liquid carriers the coalpowder impurities to be discharged out of a pump cavity; the active cleaning in the pump and the underground parameter online monitoring are realized.

The invention relates to an underground hydraulic piston pump. The underground hydraulic piston pump comprises a working barrel (30), a fixed valve (43), a transverse partition (45) and a double-piston structure, wherein the fixed valve (43) is arranged on the bottom of the working barrel; the double-piston structure is positioned in inner space of the working barrel (30) and comprises an upper moving valve (33), a lower moving valve (39) and a hollow piston rod (36); and a fluid seal of the hollow piston rod (36) penetrates in the transverse partition (45), so that the upper moving valve (33) is connected with the lower moving valve (39). The underground hydraulic piston pump can descend to the tail end of a high-inclination well or a cluster well, limitation of the high-inclination well or the cluster well on the well descending depth of the underground pump is relieved, the potential productivity of an oil-gas well can be improved to the great extent, the ultimate recovery factor on the development of an oil-gas filed is increased, and the production cost is reduced while the pump efficiency is improved.

A multifunctional centralizing and oil increasing device characterized by a rotary centralizer capable of being changed to a plunger and a matched check valve comprises a moving coupling, a rod, a floating nylon spiral guide sleeve, a fixed nylon spiral guide sleeve, a fixed coupling and a check valve. The moving coupling, the rod, the floating nylon spiral guide sleeve, the fixed nylon spiral guide sleeve and the fixed coupling are combined together to be installed between two sucker rods to form the rotary centralizer. In up moving, the floating nylon spiral guide sleeve and the fixed nylon spiral guide sleeve are meshed to have the effect of the plunger, the check valve is arranged on the close sucker rod disposed on the lower side and is semi-fixed on an oil pipe to have the effect of a fixed valve, and accordingly a set of integral oil-well pump is formed. By changing materials and structures, the multifunctional centralizing and oil increasing device integrates multiple functions such as centralizing, abrasion resisting, falling preventing, paraffin preventing, sand preventing, clamping preventing, energy saving and oil increasing, achieves the purpose of oil increasing in aspects of thermal washing oil consumption reducing, production time efficiency increasing, multi-stage pump oil extracting and pump efficiency improving, and can be widely applied to oil extracting of sucker-rod pumps of vertical shafts, directional wells, conventional heavy oil wells and common sand production wells.

The invention discloses a pumping-aiding device of an oil pumping rod and a sand blocking oil outlet sliding sleeve thereof. The pumping-aiding device of the oil pumping rod comprises a core rod, wherein the upper end of the core rod is connected with an upper connecting hoop; the lower end of the core rod is connected with a lower connecting hoop; the sand blocking oil outlet sliding sleeve can glidingly sleeve the middle part of the core rod and is a hollow step shaft; the hollow part is a step through hole; a first shaft section and a second shaft section are at least formed on the step shaft from top to bottom; the outer diameters of the first shaft section and the second shaft section are sequentially increased; a transition surface is formed between the first shaft section and the second shaft section; a lateral opening is axially and downwards formed in the place which contains the transition surface and is communicated with the step through hole to form an oil passage; the maximum inner diameter of the sand blocking oil outlet sliding sleeve is smaller than the outer diameter of the lower connecting hoop. According to the pumping-aiding device of the oil pumping rod and the sand blocking oil outlet sliding sleeve provided by the invention, pumping-aiding, sand-blocking and righting functions can be simultaneously realized, and the pumping-aiding device and the sand blocking oil outlet sliding sleeve are simple in structure.

The invention relates to a scale removing agent used in an oil well and a preparation method of the scale removing agent, and belongs to the technical field of cleaning agents of petroleum exploitation equipment. The method provided by the invention adopts three-dimensional envelope type chelating agent tetrasodium iminodisuccinate (IDS), diethylene triamine pentaacetic acid (DTPA), amino trimethylene phosphonic acid (ATMP), sodium ethylenediamine tetramethylene phosphonate and polymaleic acid to prepare the alkaline scale removing agent, and the scale removing agent has strong chelating ability, complexes inorganic scale generated in an oil field through multi-stage ionization, has a better removing effect on the inorganic scale such as carbonate scale and sulfate scale and less corrosivity to the petroleum exploitation equipment, and prolongs a pump inspection cycle in the oil well.

The invention discloses a monitoring system of a coal bed gas screw pump well, comprising a solar control device, a sensor, a multi-parameter recorder, a current transformer, an electric parameter collector, a wireless controller, a liquid level automatic monitor, a central control computer, a portable data acquisition unit and monitoring diagnosis software, wherein the multi-parameter recorder can be used for measuring the voltage and current parameters of the screw pump well through the current transformer and the electric parameter collector and computing the other electric parameters suchas the active power, the power factor and the like; and the data monitoring diagnosis software is arranged in the central control computer and used for receiving test data are received, forming a database, carrying out comprehensive analysis and diagnosis on the test parameters in the database and automatically describing the change conditions of the parameters of the coal bed gas well according to the historic data parameters. The historic recording curves of all the parameter data are expressed in a form of K line graph so that the parameter change of each well in each day and any period oftime can be checked conveniently.

The invention relates to a device for directly driving the screw pump, while it is mounted on the ground, to solve the problems as large power consumption, hard rotation adjustment, and high maintenance cost, wherein it is characterized in that: changing the rotation axle of power motor of screw pump into hollow axle, to directly transmit the power via using clamper to connect the oil pump rod; the three-way oil tube for outputting oil is connected to the sealing tube of motor axle; the sealing tube and hollow axle have mechanical sealing at the end cover; the oil pump rod and axial head use coil root static sealing; the axial head and hollow motor axle use rubber ring static sealing; the lower end cover is embedded with axial taper bearing to use the upper and lower end cover bearings as radial correction bearing; the flange disc at the well open is mounted with clamp sealing device; the main power circuit of motor is parallel connected to the brake resistance. The invention controls the motor to directly drive the screw pump, with lower energy consumption and continuous speed adjustment.

The invention discloses a ternary composite flooding well scale remover as well as a preparation method and application method thereof, and belongs to the technical field of the oil production engineering. The scale remover is prepared from the following components in parts by weight: 50-60 parts of chelating agent, 0.2-2 parts of dispersing agent, 0.1-2 parts of surfactant, 45-50 parts of synergist and 0.1-2 parts of stabilizer. The ternary composite flooding well scale remover, the synergist and water are mixed in a mass ratio being 2 to 1 to (5-7) to obtain a scale removing solution. According to the ternary composite flooding well scale remover provided by the invention, nucleation is prevented, and silicon dioxide particles are dispersed and are prevented from being gathered, two dosing processes which are an electric dosing process and a pressure difference type dosing process are adopted, and continuous and effective scale inhibitor concentration is formed in the solution, so that relatively good effect on oil well scale-forming and clearing which takes silicate scales and carbonate scales as the principal things is achieved, a pump inspection period is prolonged and stableproduction is promoted.

The invention relates to the technical field of petroleum microorganisms, and particularly discloses a high-temperature-resistant and strong-emulsification microorganism strain and application of the microorganism strain in paraffin removing and preventing. A paraffin removing and preventing strain is preserved in the China Center for Type Culture Collection and has the preservation number of CCTCC NO:M2015695. The microorganism strain solves the problems that an existing microorganism strain is poor in high temperature resistance, not good in raw petroleum emulsification effect, generally low in paraffin removing rate and high in petroleum production cost. The paraffin removing rate of the paraffin removing and preventing strain reaches up to 71.4-80.6%, and the paraffin removing and preventing strain can grow at the temperature of 90 DEG C, has high emulsification capacity, can effectively reduce raw petroleum viscosity and surface tension and prevent paraffin crystals from being accumulated on a well wall, has effects on preventing and removing paraffin, improves petroleum well yield, and has wide application value in actual production of a petroleum field.

The invention relates to the technical field of components of mechanical equipment and structural systems, and concretely relates to a graphene component. The component is characterized in that the component (1) contains graphene (2). The graphene component has breaking strength resistance which reaches 130Gpa, high temperature resistance which reaches 2360 DEG C, density which is 1 / 8 to 1 / 5 of the density of steel, and elasticity modulus which is 118Gpa; the component has the advantages of electric conduction, heat conduction, water resistance, rust prevention, fatigue tolerance, corrosion resistance, wear resistance, resistance reduction, and scale prevention; and the surface has wide energy application fields.

The invention relates to a special protector and a method for a speed reducer of a downhole electric submersible progressing cavity pump.The method includes that new lubricating oil is delivered into downhole environments via a special oil injection cable by a high-pressure oil injection pump on the ground, a check safety valve is arranged at the lower end of the special protector, starting pressures of the check safety valve can be adjusted according to different well depths, the check safety valve is started under the effects of oil pressures, the new lubricating oil is injected into the special protector from the lower portion, and old lubricating oil is drained into clearance of oil casings via a breathing hole in the upper portion of the special protector, so that an oil change procedure can be completed.The special protector and the method have the advantages that the special protector is high in original protector compatibility, and most accessories are universal; the special protector is simple in structure, and the starting pressures of the check safety valve can be adjusted according to the different well depths; the special protector can be easily and reliably connected with the oil injection cable; the lubricating oil can be changed periodically, accordingly, the downhole speed reducer can be assuredly excellently lubricated, and the service life of the speed reducer can be effectively prolonged; the thrust bearable capacity can be enhanced; the pump checking cycle can be prolonged, and the operating expense can be reduced.