CN117072137B - Associated gas on-line pre-separation device before heating and metering liquid discharged from oil extraction well - Google Patents
Associated gas on-line pre-separation device before heating and metering liquid discharged from oil extraction well Download PDFInfo
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- CN117072137B CN117072137B CN202311344978.5A CN202311344978A CN117072137B CN 117072137 B CN117072137 B CN 117072137B CN 202311344978 A CN202311344978 A CN 202311344978A CN 117072137 B CN117072137 B CN 117072137B
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- associated gas
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- 238000000926 separation method Methods 0.000 title claims abstract description 92
- 238000010438 heat treatment Methods 0.000 title claims abstract description 47
- 239000007788 liquid Substances 0.000 title claims abstract description 24
- 238000000605 extraction Methods 0.000 title abstract description 8
- 239000010779 crude oil Substances 0.000 claims abstract description 105
- 238000007667 floating Methods 0.000 claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims description 21
- 239000003921 oil Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 13
- 238000004519 manufacturing process Methods 0.000 claims description 12
- 230000007246 mechanism Effects 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 5
- 239000004809 Teflon Substances 0.000 claims description 3
- 229920006362 Teflon® Polymers 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 2
- 239000003129 oil well Substances 0.000 abstract description 8
- 238000007790 scraping Methods 0.000 description 7
- 239000001993 wax Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000033001 locomotion Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012188 paraffin wax Substances 0.000 description 2
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/34—Arrangements for separating materials produced by the well
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B36/00—Heating, cooling, insulating arrangements for boreholes or wells, e.g. for use in permafrost zones
Abstract
The invention discloses an on-line pre-separation device for associated gas before heating and metering of oil well liquid, which comprises a heat exchange module for heating crude oil and a pre-separation module positioned in front of the heat exchange module. Crude oil extracted from an oil well firstly enters a pre-separation module to carry out associated gas pre-separation, the difference of crude oil and gas density is utilized in a separation tank, so that gas is separated out upwards and enters a conveying pipeline behind a heat exchange module, the crude oil downwards reenters the heat exchange module to be heated, gas blockage is avoided in the heat exchange module, the heating efficiency of the crude oil is improved, the loss of heat energy is reduced, and meanwhile, the accuracy of crude oil extraction and metering can be improved. The floating valve core which can float up and down according to the liquid level of the crude oil is arranged in the separating tank, so that the pressure difference can be established between the crude oil outlet of the separating tank and the inlet of the heat exchange module, the crude oil can smoothly flow, and the phenomenon of air blockage in the separating tank is avoided.
Description
Technical Field
The invention relates to the technical field of crude oil extraction, in particular to an associated gas on-line pre-separation device before heating and metering of liquid discharged from an oil production well.
Background
The western oil fields in China have wide regions, the oil extraction well sites and site spacing of pipeline oil transportation are large, and when the air temperature is low, wax precipitation can occur in the crude oil transportation process, so that the blockage of a transportation pipeline, the reduction of the crude oil yield, the increase of the load and the energy consumption of an oil pumping unit can be caused, and the blockage removal construction operation of the pipeline and the consumption of chemical agents can be increased. In order to prevent wax deposition during transportation of crude oil, the crude oil is typically heated at the well site so that the crude oil temperature is not so low in the transportation pipeline as to cause wax deposition.
The crude oil is produced with associated gas, the associated gas is a light hydrocarbon component generated together with the crude oil, the crude oil is mutually dissolved with the crude oil in an oil reservoir, when the crude oil is produced, the original conditions of the oil reservoir such as temperature, pressure and the like are destroyed, and the associated gas is separated from the viscous crude oil in a gas form to be separated out singly to become gas flow, and is produced along with the crude oil to the ground.
Generally, when heating the crude oil transported from the well site, the imported crude oil is directly pumped into a heating device for heating, for example, a heating device, a heating system and a heating control method for the crude oil in the well site are disclosed in the patent CN201310412388.1 of the invention of china. However, due to the existence of crude oil associated gas, the heat exchange efficiency of crude oil in the heating device is low, energy loss is caused, and air blockage of the heat exchange coil is also possible. And the associated gas is mixed in the crude oil, so that the accuracy of crude oil exploitation and measurement is reduced.
Disclosure of Invention
The invention aims to solve the technical problem of providing an associated gas online pre-separation device which can separate out associated gas before crude oil heating and metering.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides an on-line pre-separation device of associated gas before oil recovery well liquid is heated, measurement, its characterized in that includes the pre-separation module, the pre-separation module includes:
the device comprises a separating tank, wherein a crude oil inlet A is vertically arranged at the side of the upper part of the separating tank, an exhaust port is arranged at the top of the separating tank, a ball float valve is arranged on the exhaust port, a crude oil outlet A is arranged at the bottom of the separating tank, a section of vertical adjusting pipe is fixed at the bottom end of the crude oil outlet A, an adjusting port is arranged at the top end of the crude oil outlet A, and a guide ring positioned right above the adjusting port is fixed in the separating tank;
the floating valve core is positioned in the separating tank and comprises an adjusting rod, the adjusting rod is movably inserted into the guide ring, the top of the adjusting rod is fixedly provided with a floating ball, the bottom of the adjusting rod is fixedly provided with a core block, and the core block can adjust the opening of the adjusting port after being lifted along with the floating ball;
the limiting ejector rod is positioned in the adjusting pipe, can move up and down and is locked with the adjusting pipe;
the heating assembly is provided with two groups which are respectively embedded in the inner wall of the adjusting port and the outer wall of the core block;
the cleaning mechanism comprises a lower annular guide rail, an upper annular guide rail, a rotary guide rod, a lifting block and a scraper, wherein the lower annular guide rail and the upper annular guide rail are sleeved outside the separating tank and are coaxially fixed with the separating tank, the rotary guide rod is vertically arranged, two ends of the rotary guide rod are respectively matched with the lower annular guide rail and the upper annular guide rail in a sliding manner, the rotary guide rod can rotate around the separating tank under the driving of a driving part, the lifting block is arranged on the rotary guide rod, the lifting block can move up and down along the rotary guide rod under the driving of the lifting assembly, a magnetic block A close to the outer wall of the separating tank is fixed on the lifting block, the scraper is positioned in the separating tank and is fixed with a magnetic block B, and the magnetic block B can be adsorbed with the magnetic block A.
The further technical scheme is that the adjusting pipe comprises an upper fixed pipe, a lower fixed pipe and a movable pipe arranged between the upper fixed pipe and the lower fixed pipe, wherein the movable pipe is fixed with the upper fixed pipe and the lower fixed pipe through internal threads at two ends, the lower end of the limiting ejector rod is fixed in the movable pipe, sealing rings are arranged on the end faces at two ends of the movable pipe, the movable pipe is connected with nuts through external threads at two ends, and the nuts can extrude the sealing rings.
The further technical scheme is that the outer surface of the core block and the inner surface of the adjusting port are both covered with a Teflon coating.
The further technical scheme is that the adjusting pipe is fixedly connected with the separating tank through a flange structure.
The further technical scheme is that the guide ring is connected with an assembly ring through a plurality of radial connecting rods, the main body of the separating tank is connected with the sealing head at the bottom of the separating tank through a flange structure, and the assembly ring is clamped between an upper flange plate and a lower flange plate.
The separating tank is characterized in that a splitter plate is fixed in the separating tank and positioned above the floating valve core, the splitter plate is umbrella-shaped, and a plurality of splitter holes are uniformly distributed on the edge of the splitter plate in a circumferential direction.
The guide cylinder is fixed below the splitter plate, the floating ball is positioned in the guide cylinder, and a plurality of communication holes are uniformly distributed on the side wall of the upper part of the guide cylinder in a circumferential direction.
The further technical scheme is that the lower end of the rotary guide rod is fixedly provided with a guide trolley, the guide trolley can walk along the lower annular guide rail under the drive of the rotary motor, the upper end of the rotary guide rod is fixedly provided with a universal ball wheel, and the universal ball wheel is rotatably positioned in a guide groove on the bottom surface of the upper annular guide rail.
Further technical scheme is that the lifting assembly includes:
the chain wheel A is rotatably fixed at the lower end of the rotary guide rod, and a lifting motor for driving the chain wheel A to rotate is arranged on the chain wheel A;
the chain wheel B is rotatably fixed at the upper end of the rotary guide rod;
a chain connecting the sprocket A and the sprocket B;
the slide way is provided with two slide ways which are respectively fixed on two sides of the rotary guide rod;
the lifting block is fixedly provided with a sliding block which is in sliding connection with each slideway, and the lifting block is fixed with the chain.
The further technical scheme is that the rotary guide rod is provided with an upper sensor for detecting the upper limit height of the lifting block and a lower sensor for detecting the lower limit height of the lifting block, the upper sensor and the lower sensor are both connected with a signal input end of the controller, and a signal output end of the controller is connected with the lifting motor.
The beneficial effects of adopting above-mentioned technical scheme to produce lie in:
crude oil extracted from an oil well firstly enters a pre-separation module to carry out associated gas pre-separation, the difference of crude oil and gas density is utilized in a separation tank, so that gas is separated out upwards and enters a conveying pipeline behind a heat exchange module, the crude oil downwards reenters the heat exchange module to be heated, gas blockage is avoided in the heat exchange module, the heating efficiency of the crude oil is improved, the loss of heat energy is reduced, and meanwhile, the accuracy of crude oil extraction and metering can be improved.
The floating valve core which can float up and down according to the liquid level of the crude oil is arranged in the separating tank, so that the pressure difference can be established between the crude oil outlet of the separating tank and the inlet of the heat exchange module, the crude oil can smoothly flow, and the phenomenon of air blockage in the separating tank is avoided. When the system is operated initially, the pressure in the separating tank is similar to the pressure at the inlet of the heat exchange module, the separating tank is at a pressure regulating stage, when the liquid level of crude oil in the separating tank is lower, the floating valve core is at a low position, the opening of the regulating port is smaller, crude oil flows out slowly, the pressure in the separating tank is increased along with continuous inflow of crude oil in the separating tank, the floating valve core is increased along with the increase of the liquid level of crude oil in the separating tank, the opening of the regulating port is increased, the discharged crude oil is increased, meanwhile, the floating ball valve is automatically opened, separated associated gas is discharged to a pipeline behind the heat exchange module, the liquid level of crude oil is reduced along with the decrease of the pressure in the separating tank, and the floating ball valve is closed along with the decrease of the regulating valve. Through the self-adjustment of the opening of the separation tank, a reasonable pressure difference environment is finally established between the pressure in the separation tank and the inlet of the heat exchange module, and smooth flow of crude oil in the pre-separation module and the heat exchange module is ensured.
In order to avoid the regulation mouth to be closed completely, the floating valve core is difficult to float again, so that a limiting ejector rod which is used for carrying out the lowest limiting on the floating valve core is arranged below the floating valve core, the height of the limiting ejector rod can be adjusted, and the minimum opening of the oil drain port at the bottom of the separation tank can be adjusted in real time according to the liquid inlet amount and the gas-liquid volume ratio so as to adapt to different oil well working conditions.
Because the crude oil introduced into the separating tank is relatively viscous without heating, in order to avoid the phenomenon that the regulating port is completely blocked and closed due to wax precipitation on the inner wall of the regulating port and the outer wall of the core block when the floating valve core is at a low position, the heating components are embedded in the inner wall of the regulating port and the outer wall of the core block, the smooth outflow of the crude oil at the regulating port is ensured, and the minimum opening of the regulating port is effective.
Also in order to avoid sticky petroleum to bond at the inner wall of the separation tank, the separation tank is spoiled after a long time, so a scraping mechanism is arranged on the separation tank, a scraper and a lifting block which are fixed by magnetic force are arranged on the inner side and the outer side of the separation tank, the lifting block is driven to rotate around the separation tank and lift simultaneously, the scraper can be driven to do spiral motion along the inner wall of the separation tank, paraffin adhered to the inner wall of the separation tank can be scraped, crude oil can be stirred spirally, the fluidity of the crude oil in the separation tank is enhanced, bubbles reserved in the crude oil are destroyed, and associated gas can be separated from the crude oil fully.
Drawings
The invention will be described in further detail with reference to the drawings and the detailed description.
FIG. 1 is a schematic diagram of the structure of the present invention;
FIG. 2 is a schematic diagram of a preseparation module according to the present invention;
FIG. 3 is a schematic diagram of the structure of the separator tank according to the present invention;
FIG. 4 is a schematic view of the structure of the rotary guide portion of the present invention;
FIG. 5 is a schematic diagram of the axial structure of the internal structure of the separator tank according to the present invention;
FIG. 6 is a schematic cross-sectional view of the internal structure of the separator of the present invention;
fig. 7 is a schematic view of an exploded structure of the internal structure of the separation tank in the present invention.
In the figure:
100-a pre-separation module and 200-a heat exchange module;
110-knockout drum, 111-crude oil inlet A, 112-exhaust port, 113-crude oil outlet A, 113 a-regulating port, 114-regulating pipe, 1141-upper fixed pipe, 1142-lower fixed pipe, 1143-movable pipe, 1144-seal ring, 1145-nut, 115-guide ring, 1151-fitting ring, 116-splitter plate, 1161-splitter hole, 117-guide cylinder, 1171-communication hole;
120-floating valve core, 121-adjusting rod, 122-floating ball and 123-core block;
130-limiting ejector rods;
140-scraping mechanism, 141-lower annular guide rail, 142-upper annular guide rail, 143-rotary guide rod, 1431-guiding trolley, 1432-universal ball wheel, 1433-sprocket A, 1434-sprocket B, 1435-slideway, 144-lifting block and 1441-slider.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
As shown in fig. 1 to 7, an on-line pre-separation device for associated gas before heating and metering production well liquid comprises a pre-separation module 100, wherein the separation module 100 is applied in front of a heat exchange module 200 for heating crude oil and in front of a crude oil metering device. Crude oil extracted from an oil well firstly enters the pre-separation module 100 to carry out associated gas pre-separation, the associated gas is separated and then is metered and heated, and the separated gas enters a conveying pipeline behind the heat exchange module 200, so that gas blockage can be avoided in the heat exchange module 200, the heating efficiency of the crude oil is improved, the loss of heat energy is reduced, and meanwhile, the accuracy of crude oil extraction metering can be improved.
The heat exchange module 200 has various forms, and can adopt the existing heating modes such as water jacket heating, electromagnetic heating, resistance heating, solar heating or heat pump heating, and the like, and the present invention is not limited thereto.
In the associated gas on-line pre-separation device before the production well effluent is heated and metered, the pre-separation module 100 comprises a separation tank 110, a floating valve core 120, a limiting ejector 130, a heating component and a scraping mechanism 140.
As shown in fig. 2 and 3, the separation tank 110 is vertically arranged, has a closed tank structure, and has upper and lower ends provided with sealing heads, and the bottom of the separation tank is supported on the ground through a support guide cylinder 118. The upper side of the separation tank 110 is provided with a crude oil inlet A111, the crude oil inlet A111 is connected with an oil well, and crude oil extracted from the oil well is pumped into the separation tank 110 through the crude oil inlet A111. The top of the separation tank 110 is provided with an exhaust port 112, the exhaust port 112 is communicated with a crude oil outlet B of the heat exchange module 200 through an air pipe, a floating ball valve 122 is arranged on the air pipe, when the separation tank 110 reaches a certain value, a floating ball valve is automatically opened to exhaust, the exhausted gas passes through the heat exchange module 200 and enters a conveying pipeline behind the heat exchange module 200, the bottom of the separation tank 110 is provided with a crude oil outlet A113, the top of the crude oil outlet A113 is provided with an adjusting port 113a, the bottom of the crude oil outlet A113 is fixedly provided with a section of vertical adjusting pipe 114, the adjusting pipe 114 is communicated with a crude oil inlet B of the heat exchange module 200, and crude oil treated by the separation tank 110 enters the heat exchange module 200 from the crude oil outlet A113 to exchange heat. The crude oil metering device may be disposed in front of the crude oil inlet B of the heat exchange module 200.
The floating valve core 120 is located in the separation tank 110, as shown in fig. 5-7, the floating valve core 120 includes an adjusting rod 121, a floating ball 122 is fixed on the top of the adjusting rod 121, the floating ball 122 floats on the crude oil liquid surface under the action of buoyancy, a core block 123 is fixed on the bottom of the adjusting rod 121, and the core block 123 can adjust the opening of the adjusting port 113a after being lifted. Among them, it is preferable that the adjustment port 113a has an inverted frustum shape with its large end disposed upward, the shape of the core block 123 is matched with the adjustment port 113a, and the size of the interval between the adjustment port 113a and the core block 123 can be adjusted by lifting and lowering the core block 123.
A splitter plate 116 is fixed in the separation tank 110, and the splitter plate 116 is positioned above the floating valve core 120 and below the crude oil inlet a 111. The splitter plate 116 is umbrella-shaped, and a plurality of splitter holes 1161 are uniformly distributed on the edge of the splitter plate 116 in the circumferential direction. The crude oil entering the separation tank 110 is split by the splitter 116, so that the flow speed of the crude oil is reduced, the scattering area of the crude oil is enlarged, and associated gas can be fully separated out from the crude oil.
A floating valve core 120 capable of floating up and down according to the liquid level of crude oil is provided in the separation tank 110, so that a pressure difference is established between the crude oil outlet of the separation tank 110 and the inlet of the heat exchange module 200, and crude oil can smoothly flow, thereby avoiding the formation of air blocking phenomenon in the separation tank 110. When the system is started to operate, the pressure in the separating tank 110 is similar to the pressure at the inlet of the heat exchange module 200, the separating tank 110 is at a pressure regulating stage, when the liquid level of crude oil in the separating tank 110 is low, the floating valve core 120 is at a low position, the opening of the regulating port 113a is small, crude oil flows out slowly, the pressure in the separating tank 110 is increased along with continuous inflow of crude oil in the separating tank 110, the floating valve core 120 is increased along with increase of the liquid level of crude oil in the separating tank 110, the opening of the regulating port 113a is increased, the discharged crude oil is increased, meanwhile, the floating ball valve is automatically opened, separated associated gas is discharged to a pipeline behind the heat exchange module 200, the liquid level of crude oil is reduced along with decrease of the pressure in the separating tank 110, and the floating ball valve is closed along with decrease of the regulating valve. Through the self-adjustment of the opening of the separation tank 110, a reasonable pressure difference environment is finally established between the pressure in the separation tank 110 and the inlet of the heat exchange module 200, and smooth flow of crude oil in the pre-separation module 100 and the heat exchange module 200 is ensured.
In order to keep the floating valve core 120 in a vertical state all the time, a guide ring 115 is fixed in the inner cavity of the separation tank 110 right above the adjusting port 113a, and the adjusting rod 121 is movably inserted into the guide ring 115. Specifically, the guide ring 115 is connected with an assembly ring 1151 through a plurality of radial connecting rods, the main body of the separation tank 110 is connected with the sealing head at the bottom of the main body through a flange structure, the assembly ring 1151 is clamped between the upper flange plate and the lower flange plate, a welded fixing mode is avoided, and the guide ring 115 can be detached for cleaning. The guide ring 115 ensures that the floating valve core 120 always maintains a vertical state during floating adjustment and is effectively matched with the adjustment port 113 a.
A guide cylinder 117 is also fixed below the flow dividing plate 116, the floating ball is positioned in the guide cylinder 117, and a plurality of communication holes 1171 are uniformly distributed on the side wall of the upper part of the guide cylinder 117 in a circumferential direction. The guiding tube 117 can further restrict the movement direction of the floating ball 122, the communication hole 1171 is connected with the inner space and the outer space of the guiding tube 117, and after the liquid level reaches above the lower edge of the guiding tube 117, the pressure balance of the inner space and the outer space of the guiding tube 117 can be maintained.
The adjusting tube 114 comprises an upper fixed tube 1141, a lower fixed tube 1142 and a movable tube 1143 therebetween, wherein both ends of the movable tube 1143 are respectively provided with external threads and internal threads, the movable tube 1143 is fixed with the upper fixed tube 1141 and the lower fixed tube 1142 through the internal threads at both ends, the lower end of the limiting ejector rod 130 is fixed in the movable tube 1143, and the height of the limiting ejector rod 130 can be adjusted by rotating the movable tube 1143. The end surfaces of the two ends of the movable pipe 1143 are respectively provided with a sealing ring 1144, the movable pipe 1143 is connected with a nut 1145 through external threads at the two ends, the nut 1145 is provided with a pressing edge pressed on the sealing rings 1144, and the sealing rings 1144 can be extruded by screwing the nuts 1145, so that the effective sealing is achieved.
When the height of the limiting ejector rod 130 is adjusted, the nuts 1145 at the two ends are screwed outwards, then the movable pipe 1143 is rotated forwards or reversely, the height of the limiting ejector rod 130 is adjusted, the movable pipe 1143 can keep stable in height after being adjusted in a threaded connection mode, and after the height of the movable pipe 1143 is adjusted, the nuts at the two ends are pressed against the corresponding sealing rings 1144.
In order to avoid the complete closing of the adjustment port 113a, otherwise, the floating valve core 120 is difficult to float again, so that a limiting ejector rod 130 for limiting the floating valve core 120 at the lowest is further arranged below the floating valve core 120, the limiting ejector rod 130 is positioned in the adjustment pipe 114 and can move up and down and be locked, and the top end of the limiting ejector rod 130 abuts against the core block 123 to limit the lowest height of the floating valve core 120.
The height of the limiting ejector rod 130 can be adjusted, so that the minimum opening of the oil drain port at the bottom of the separation tank 110 can be adjusted in real time according to the ratio of the liquid inlet amount to the gas-liquid volume so as to adapt to different oil well working conditions. In order to facilitate the adjustment of the height of the limiting ejector rod 130 by the worker, height scale marks can be further arranged on the outer wall of the movable pipe 1143, so that the worker can clearly know the adjusted height of the limiting ejector rod 130.
Since the crude oil introduced into the separation tank 110 is relatively viscous without heating, in order to avoid that the inner wall of the regulating port 113a and the outer wall of the core block 123 are completely blocked and closed due to wax precipitation when the floating valve core 120 is at a low position, heating assemblies are embedded into the inner wall of the regulating port 113a and the outer wall of the core block 123, so that smooth outflow of the crude oil at the regulating port 113a is ensured, and the minimum opening of the regulating port 113a is effective. The heating component can be in the existing heating modes such as a heating wire or a heating plate, a protective layer is covered outside the heating component, and the heating component is not in direct contact with crude oil.
The teflon coating is coated on both the outer surface of the core block 123 and the inner surface of the adjustment port 113a, so that adhesion of crude oil can be effectively prevented.
In addition, in order to facilitate deep cleaning of the adjusting port 113a and the core block 123 when the system is stopped, the upper fixing pipe 1141 of the upper section of the adjusting pipe 114 is fixedly connected to the separation tank 110 by a flange structure, and the upper fixing pipe 1141 may be detached.
Also, in order to prevent viscous oil from adhering to the inner wall of the separation tank 110, the separation tank 110 is spoiled after a long period of time, and thus a scraping mechanism 140 is provided on the separation tank 110. The scraping mechanism 140 comprises a lower annular guide rail 141, an upper annular guide rail 142, a rotary guide rod 143, a lifting block 144 and a scraper, wherein the lower annular guide rail 141 and the upper annular guide rail 142 are sleeved outside the separating tank 110 and are coaxially fixed with the separating tank 110. The rotation guide 143 is vertically provided, and both ends thereof are slidably engaged with the lower and upper annular rails 141 and 142, respectively, and are rotatable about the separation tank 110 by the driving of the driving part. The lifting block 144 is arranged on the rotary guide rod 143, the lifting block 144 can move up and down along the rotary guide rod 143 under the drive of the lifting assembly, a magnetic block A close to the outer wall of the separating tank 110 is fixed on the lifting block 144, the scraper is positioned in the separating tank 110 and is fixed with a magnetic block B, and the magnetic block B can be adsorbed with the magnetic block A under the action of magnetic field attraction. In order to prevent the scraper from falling down into the crude oil, a pull rope in a loose state is fixed to the scraper, and the pull rope is fixed to a head at the lower end of the separation tank 110.
In the scraping mechanism 140, a double guide rail is arranged on the lower annular guide rail 141, a groove is formed in the lower surface of the upper annular guide rail 142, as shown in fig. 4, a guiding trolley 1431 is fixed at the lower end of the rotating guide rail 143, the guiding trolley 1431 can walk along the lower annular guide rail 141 under the driving of a rotating motor, namely, the guiding trolley 1431 is a driving part for rotating the rotating guide rail 143, a universal ball wheel 1432 is fixed at the upper end of the rotating guide rail 143, and the universal ball wheel 1432 is rotatably positioned in a guide groove on the bottom surface of the upper annular guide rail 142. The rotary guide rod 143 can be rotated around the separation tank 110 by the driving of the rotary motor, and the operation of the rotary guide rod 143 is stabilized by the cooperation of both ends of the rotary guide rod 143 with the corresponding annular guide rail.
In the scraping mechanism 140, as shown in fig. 4, the lifting assembly includes a sprocket a1433, a sprocket B1434, a chain (not shown), and a slide 1435. The sprocket a1433 is rotatably fixed to the lower end of the rotation guide 143, and a lift motor for driving the rotation of the sprocket a1433 is provided on the sprocket a 1433. Sprocket B1434 is rotatably fixed to the upper end of the rotation guide 143. Sprocket A1433 and sprocket B1434 are driven by a chain connection. The slide 1435 has two slide blocks, which are respectively fixed on two sides of the rotary guide rod 143, and a sliding block 1441 slidably engaged with each slide 1435 is fixed on the lifting block 144, and the lifting block 144 is fixed with the chain. The chain wheel A1433 is driven to rotate by the lifting motor, so that the chain rotates, and the lifting block 144 is driven to lift up and down.
The upper sensor for detecting the upper limit height of the lifting block 144 and the lower sensor for detecting the lower limit height of the lifting block 144 are arranged on the rotary guide rod 143, the upper sensor and the lower sensor are connected with the signal input end of the controller, and the signal output end of the controller is connected with the lifting motor. When the upper sensor detects that the lifting block 144 runs to the set limit high position, a signal is transmitted to the controller, and the controller controls the lifting motor to rotate reversely to drive the lifting block 144 to move downwards; when the lower sensor detects that the lifting block 144 runs to the set limit low position, a signal is transmitted to the controller, and the controller controls the lifting motor to rotate reversely to drive the lifting block 144 to move upwards. The above steps are repeated, and the lifting block 144 is spirally moved around the separation tank 110 in cooperation with the rotary movement of the rotary guide rod 143.
The scraper and the lifting block 144 which are fixed by magnetic force are arranged on the inner side and the outer side of the separation tank 110, the lifting block 144 is driven to rotate around the separation tank 110 and lift simultaneously, the scraper can be driven to do spiral motion along the inner wall of the separation tank 110, paraffin adhered to the inner wall of the separation tank 110 can be scraped, crude oil can be stirred in a spiral mode, the fluidity of the crude oil in the separation tank 110 is enhanced, bubbles reserved in the crude oil are destroyed, and associated gas can be separated from the crude oil sufficiently.
After the associated gas on-line pre-separation device is applied before the liquid of the oil extraction well is heated and metered, the heating efficiency of crude oil can be improved, and the working condition parameters of the two groups of heat exchange modules 200 are compared with the following table:
。
the foregoing is only a preferred embodiment of the present invention, and any and all simple modifications, variations and equivalents of the present invention will fall within the scope of the present invention.
Claims (10)
1. The utility model provides an on-line pre-separation device of associated gas before oil recovery well liquid is heated, measurement, characterized in that includes pre-separation module (100), pre-separation module (100) include:
the separation tank (110) is vertically arranged, a crude oil inlet A (111) is formed in the side of the upper portion of the separation tank (110), an exhaust port (112) is formed in the top of the separation tank (110), a floating ball (122) valve is arranged on the exhaust port (112), a crude oil outlet A (113) is formed in the bottom of the separation tank (110), a section of vertical regulating pipe (114) is fixed at the bottom end of the crude oil outlet A (113), the top end of the crude oil outlet A (113) is a regulating port (113 a), and a guide ring (115) positioned right above the regulating port (113 a) is fixed in the separation tank (110);
the floating valve core (120) is positioned in the separating tank (110) and comprises an adjusting rod (121), the adjusting rod (121) is movably inserted into the guide ring (115), a floating ball (122) is fixed at the top of the adjusting rod (121), a core block (123) is fixed at the bottom of the adjusting rod, and the opening of the adjusting opening (113 a) can be adjusted after the core block (123) is lifted along with the floating ball (122);
the limiting ejector rod (130) is positioned in the adjusting pipe (114), can move up and down and is locked with the adjusting pipe (114);
the heating assembly is provided with two groups which are respectively embedded in the inner wall of the adjusting port (113 a) and the outer wall of the core block (123);
the utility model provides a clear mechanism (140), includes down annular guide rail (141), goes up annular guide rail (142), rotatory guide arm (143), lifter (144) and scraper, down annular guide rail (141) and go up annular guide rail (142) all overlap locate outside knockout drum (110) to coaxial fixed with knockout drum (110), rotatory guide arm (143) vertical setting, its both ends respectively with lower annular guide rail (141) and go up annular guide rail (142) slip cooperation to can rotate around knockout drum (110) under the drive of drive division, lifter (144) are located rotatory guide arm (143), lifter (144) can follow rotatory guide arm (143) reciprocates under the drive of lifting unit, be fixed with the magnetic force piece A that is close to knockout drum (110) outer wall on lifter (144), the scraper is located knockout drum (110) and is fixed with magnetic force piece B, magnetic force piece B can adsorb with magnetic force piece A.
2. The device for online pre-separation of associated gas before heating and metering of production well liquid according to claim 1, wherein the adjusting pipe (114) comprises an upper fixed pipe (1141), a lower fixed pipe (1142) and a movable pipe (1143) arranged between the upper fixed pipe and the lower fixed pipe (1141) through internal threads at two ends, the movable pipe (1143) is fixed with the upper fixed pipe (1141) and the lower fixed pipe (1142), the lower end of the limiting ejector rod (130) is fixed in the movable pipe (1143), sealing rings (1144) are arranged on end faces at two ends of the movable pipe (1143), nuts (1145) are connected to the movable pipe (1143) through external threads at two ends, and the nuts (1145) can extrude the sealing rings (1144).
3. An on-line pre-separation device for associated gas before heating and metering of production well effluent according to claim 1, wherein the outer surface of the core block (123) and the inner surface of the regulating port (113 a) are coated with teflon coating.
4. The device for online pre-separation of associated gas before heating and metering of production well effluent according to claim 1, wherein the adjusting pipe (114) is fixedly connected with the separating tank (110) through a flange structure.
5. The device for on-line pre-separation of associated gas before heating and metering of production well effluent according to claim 1, wherein the guide ring (115) is connected with an assembly ring (1151) through a plurality of radial connecting rods, the main body of the separation tank (110) is connected with the sealing head at the bottom of the separation tank through a flange structure, and the assembly ring (1151) is clamped between an upper flange plate and a lower flange plate.
6. The online pre-separation device for associated gas before heating and metering of production well effluent according to claim 1, wherein a splitter plate (116) is fixed in the separation tank (110), the splitter plate (116) is located above the floating valve core (120), the splitter plate (116) is umbrella-shaped, and a plurality of splitter holes (1161) are uniformly distributed on the edge of the splitter plate (116) in a circumferential direction.
7. The on-line pre-separation device for associated gas before heating and metering of production well effluent according to claim 6, wherein a guide cylinder (117) is fixed below the flow dividing plate (116), the floating ball is positioned in the guide cylinder (117), and a plurality of communication holes (1171) are uniformly distributed on the side wall of the upper part of the guide cylinder (117) in a circumferential direction.
8. The on-line pre-separation device for associated gas before heating and metering of production well effluent according to claim 1, wherein a guiding trolley (1431) is fixed at the lower end of the rotary guide rod (143), the guiding trolley (1431) can walk along the lower annular guide rail (141) under the driving of a rotary motor, a universal ball wheel (1432) is fixed at the upper end of the rotary guide rod (143), and the universal ball wheel (1432) is rotatably positioned in a guide groove on the bottom surface of the upper annular guide rail (142).
9. An on-line pre-separation device for associated gas before heating and metering production well effluent according to claim 1, wherein the lifting assembly comprises:
a sprocket A (1433) rotatably fixed to the lower end of the rotation guide rod (143), and a lifting motor for driving the sprocket A (1433) to rotate;
sprocket B (1434) rotatably fixed to the upper end of the rotary guide rod (143);
a chain connecting sprocket A (1433) and sprocket B (1434);
the slide way (1435) is provided with two slide ways which are respectively fixed on two sides of the rotary guide rod (143);
and a sliding block (1441) which is in sliding connection with each slide way (1435) is fixed on the lifting block (144), and the lifting block (144) is fixed with a chain.
10. The on-line pre-separation device for associated gas before heating and metering of production well effluent according to claim 9, wherein an upper sensor for detecting the upper limit height of a lifting block (144) and a lower sensor for detecting the lower limit height of the lifting block (144) are arranged on the rotary guide rod (143), the upper sensor and the lower sensor are both connected to a signal input end of a controller, and a signal output end of the controller is connected to a lifting motor.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311344978.5A CN117072137B (en) | 2023-10-18 | 2023-10-18 | Associated gas on-line pre-separation device before heating and metering liquid discharged from oil extraction well |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311344978.5A CN117072137B (en) | 2023-10-18 | 2023-10-18 | Associated gas on-line pre-separation device before heating and metering liquid discharged from oil extraction well |
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| CN117072137A CN117072137A (en) | 2023-11-17 |
| CN117072137B true CN117072137B (en) | 2023-12-12 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908595A (en) * | 2006-08-08 | 2007-02-07 | 寿焕根 | Automatic metering device for oil, water and gas three-phase flow |
| CN201138221Y (en) * | 2007-10-09 | 2008-10-22 | 上海一诺仪表有限公司 | Oil, fume, water tri-phased low measuring apparatus |
| CN201241690Y (en) * | 2008-08-19 | 2009-05-20 | 寿焕根 | Oil, water and gas three-phase automatic separated metering device |
| KR101672996B1 (en) * | 2015-09-18 | 2016-11-04 | 주식회사 탱크로드 | Oil storage system with the oil purification and tank cleaning function |
| CN213944258U (en) * | 2020-12-24 | 2021-08-13 | 河南应用技术职业学院 | Oil tank cleaning device |
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2023
- 2023-10-18 CN CN202311344978.5A patent/CN117072137B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1908595A (en) * | 2006-08-08 | 2007-02-07 | 寿焕根 | Automatic metering device for oil, water and gas three-phase flow |
| CN201138221Y (en) * | 2007-10-09 | 2008-10-22 | 上海一诺仪表有限公司 | Oil, fume, water tri-phased low measuring apparatus |
| CN201241690Y (en) * | 2008-08-19 | 2009-05-20 | 寿焕根 | Oil, water and gas three-phase automatic separated metering device |
| KR101672996B1 (en) * | 2015-09-18 | 2016-11-04 | 주식회사 탱크로드 | Oil storage system with the oil purification and tank cleaning function |
| CN213944258U (en) * | 2020-12-24 | 2021-08-13 | 河南应用技术职业学院 | Oil tank cleaning device |
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| CN117072137A (en) | 2023-11-17 |
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