CN109488253B - Pollution-free high-temperature nitrogen cleaning operation method and device for pumping well - Google Patents
Pollution-free high-temperature nitrogen cleaning operation method and device for pumping well Download PDFInfo
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- CN109488253B CN109488253B CN201811218217.4A CN201811218217A CN109488253B CN 109488253 B CN109488253 B CN 109488253B CN 201811218217 A CN201811218217 A CN 201811218217A CN 109488253 B CN109488253 B CN 109488253B
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 403
- 238000004140 cleaning Methods 0.000 title claims abstract description 275
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 199
- 238000000034 method Methods 0.000 title claims abstract description 98
- 238000005086 pumping Methods 0.000 title claims abstract description 92
- 239000003921 oil Substances 0.000 claims abstract description 253
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 111
- 239000007789 gas Substances 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims abstract description 34
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- 239000010779 crude oil Substances 0.000 claims abstract description 24
- 239000002699 waste material Substances 0.000 claims abstract description 24
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- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 3
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B37/00—Methods or apparatus for cleaning boreholes or wells
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- Cleaning By Liquid Or Steam (AREA)
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Abstract
A pollution-free high-temperature nitrogen cleaning operation method and apparatus of pumping well, relate to a cleaning method, after the high-temperature nitrogen produced by nitrogen making machine mixes with water vapor that the high-pressure injection water or steam engine make in proportion and forms the mixed gas of high-temperature nitrogen and water vapor and pressurize, through collecting the airtight cleaning device of the sucker rod, cleaning device of inner wall of the oil pipe, cleaning device of outer wall of the oil pipe, nitrogen making room, operation room and generator set in the integral case body integrated form pumping well pollution-free high-temperature nitrogen cleaning device of integrated form carry on the pollution-free, airtight continuous cleaning and cleaning fluid can reclaim the cleaning operation totally to the sucker rod, inner wall of the oil pipe and outer wall of the oil pipe separately; the pollution-free high-temperature nitrogen cleaning operation method for the pumping well takes high-pressure water injection, high-temperature nitrogen injection, a closed continuous cleaning technology and a cleaning liquid recovery technology as cores, finally realizes the closed cleaning of the pumping rod, the inner wall of the oil pipe and the outer wall of the oil pipe, completely recovers the cleaning liquid and has zero waste of crude oil.
Description
Technical Field
The invention relates to a cleaning device, in particular to a pollution-free high-temperature nitrogen cleaning operation method and a device for an oil pumping well.
Background
The minor repair operation of the oil well is the core means for maintaining and producing the oil field and adopting the production increasing measures. The cleaning of the inner wall and the outer wall of an oil pipe and a sucker rod is the most basic and most critical ring; the oil pipe and the sucker rod are very serious in wax deposition and scaling phenomena in oil field exploitation, so that an oil flow channel is gradually reduced and even blocked, the yield of an oil well is reduced and even production is stopped, under the condition of serious wax deposition and scaling, the load of an underground oil well pump is increased due to the increase of the pressure in the oil pipe, the service life of the oil well pump is shortened, the normal production of the oil well is influenced, the quality of the cleaning quality of the oil pipe and the sucker rod has important influence on the subsequent procedures, and the use cost of the oil pipe and the quality of construction operation are further influenced. The selection of the cleaning mode directly influences the cleaning effect, the production cost, the repair quality and the operation safety of the oil pipe.
At present, the cleaning operation technology in the maintenance minor repair operation process is slowly developed, the conventional minor repair operation modes of various oil fields are not greatly different, and the following four cleaning modes are mainly adopted:
1. a water boiling method: the boiling method is a traditional cleaning mode, the mode is to soak an oil pipe recovered from an oil well in a pool, sufficient chemical cleaning agent is added, and boiling is carried out by heating through a boiler so as to clean oil stain and silt on the inner wall and the outer wall of the oil pipe. However, there are some disadvantages, mainly expressed as: (1) the cleaning agent is prepared from strong base or strong acid and other organic chemical substances, and has great damage to the oil pipe, so that the anti-corrosion layer on the inner wall and the outer wall of the oil pipe falls off in a large area, and the oil pipe loses good protection. After the oil pipe is fully contacted with air, the inner wall and the outer wall of the oil pipe can be seriously corroded, and finally the oil pipe is scrapped; (2) the environmental pollution is serious. On one hand, the gas emitted by the cleaning agent can cause harm to people; on the other hand, the sewage in the cleaning tank after cleaning is difficult to recover, and environmental pollution can be caused; (3) the labor intensity is high. When cleaning, the oil pipe needs to be lifted in and out of the pool, and if the number of the oil pipes is large, the workload can be multiplied; (4) the cost is high. The traditional oil pipe is cleaned by a heavy-duty cleaning agent, so that the price is high, and the repairing cost is overhigh due to the labor cost.
2. Intermediate frequency heating method: the medium-frequency heating method is a cleaning technology newly adopted in recent years, adopts a frequency converter to adjust the power frequency, instantaneously heats an oil pipe to be repaired, completely melts oil stains and wax on the inner and outer surfaces of the oil pipe to be repaired, then basically removes the melted oil stains and wax inside and outside the oil pipe by using an oil scraping device, cleans the oil pipe by rotating through a steel wire brush device, and finally cleans residues on the inner and outer walls of the oil pipe to be repaired by using water flow with certain pressure. The disadvantages of this approach are: (1) during heating, oil smoke and waste gas generated by sundries such as oil stains are large, the pollution is serious, and the influence on people and the environment is caused; (2) a fire easily occurs; (3) the heating temperature is not easy to determine, the metallographic structure of the oil pipe body can be damaged when the temperature is too high, and the heating effect cannot be achieved when the temperature is too low.
3. High-pressure water washing: high-pressure water washing is a new cleaning technology, a high-pressure plunger pump and a nozzle are used for generating high-speed water jet, and strong impact force directly washes dirt on the inner wall of an oil pipe to enable the dirt to fall off, so that the cleaning purpose is achieved. The disadvantages of this approach are: (1) the pressure generated during cleaning is very high, which can cause great danger to operators; (2) the nozzle is a quick-wear part and needs to be replaced frequently, so that the working efficiency is low; (3) the water consumption is very large, which causes great energy consumption.
4. Washing the direct-fired heating oil pipe with water: the whole device realizes one-stop cleaning of the oil pipe by using the combustion natural gas as a heat source and hot water internal circulation, and finally sends the oil pipe out through an output system. The disadvantages of this cleaning approach are: once the mechanical transmission part in the device breaks down, the maintenance time is long;
the conventional mechanical paraffin removal and scale removal method has the defects of poor effect, influence on oil well yield, high chemical paraffin removal cost, overhigh heat carrier cleaning cost, low heat efficiency, more used flushing fluid, well opening and drainage period of more than three days, damage to sensitive oil layers, more equipment, high energy consumption, low efficiency, large emission pollution, high operation difficulty and heavy subsequent cleaning work.
In addition, in the paraffin removal process, a large amount of crude oil is taken out of a well mouth along with a sucker rod string, the crude oil pollutes the natural environment and wastes resources after falling to the ground, currently, when an oil pipe or a sucker rod is cleaned on a well field, an anti-seepage material is usually paved on the ground, an oil-water overflow prevention cofferdam is built, an oil guide ditch, a recovery pool and other protection measures are arranged in a construction area, the conventional protection measures cannot fundamentally solve the problem that oil and water cannot fall to the ground in the operation process, the pollution problems of oil soil, plastic cloth and the like generated by the conventional protection measures are very prominent, and economic burden and environmental protection risks are caused to both parties in construction A and B.
The patent application with publication number CN103821470A discloses a heat injection nitrogen flushing process method for an oil well, and specifically discloses: after continuous high-pressure nitrogen generated by a nitrogen making vehicle group is heated by a nitrogen heating device to reach the required temperature, hot nitrogen is injected into the well through a connecting manifold and a wellhead device to carry out well flushing operation, so that the purposes of paraffin removal, scale removal, blockage removal or thick oil viscosity reduction, drainage assistance and oil well yield improvement are achieved, however, the application has the defects that: (1) only by injecting high-temperature nitrogen, dirt such as oil wax and the like can be melted, and the melted dirt cannot be washed away or carried out, so that the dirt slides down along the pipe wall to cause incomplete dirt removal; (2) according to the application, nitrogen is injected into the sleeve, only the oil stain on the outer wall of the oil pipe can be directly melted at high temperature, the oil stain on the inner wall of the oil pipe and the oil pumping rod cannot be removed, and particularly, the nitrogen in the inner wall of the oil pipe is in an upward running state and is more unfavorable for discharging the dirt; (3) according to the application, the nitrogen making vehicle set and the nitrogen heating device are arranged on an oil well site, and as is known, the nitrogen making vehicle set is large in tank body component, large in size, heavy and difficult to carry.
Patent application with publication number CN107420068A discloses a high-temperature nitrogen paraffin removal device and a paraffin removal process, and specifically discloses: nitrogen gas firing equipment passes through high temperature high pressure nitrogen pipeline and links to each other with the well casing entry of well-flushing operation, and … … high temperature nitrogen gas flows out from coiled tubing, through oil pipe wax precipitation point, and wax melts and is taken out the oil well by high temperature nitrogen gas, accomplishes positive injection paraffin removal operation process, and the not enough of this application existence is nevertheless: (1) the melted dirt such as oil wax and the like is taken out of the oil well only through nitrogen, the complete discharge of the dirt such as oil wax and the like cannot be ensured, and the discharged waste gas is mixed with the substances such as oil wax and the like to pollute the environment, so that a waste gas recovery device is not provided; (2) according to the application, nitrogen is injected into the sleeve, only the oil stain on the outer wall of the oil pipe can be directly melted at high temperature, the oil stain on the inner wall of the oil pipe and the oil pumping rod cannot be removed, and particularly, the nitrogen in the inner wall of the oil pipe is in an upward running state and is more unfavorable for discharging the dirt; (3) the temperature requirement of the needed nitrogen is high, the heat loss of the high-temperature nitrogen in the injection and return paths is large, large energy is consumed to ensure that the oil wax can be melted and the oil wax carried by the oil wax can be discharged, and the cleaning effect is poor due to the fact that thick oil wax cannot be thoroughly removed; (4) the nitrogen making and pressurizing equipment and the nitrogen heating equipment in the application have more components, larger volume and heavy weight and are difficult to carry.
The patent application with publication number CN105114035B discloses an online cleaning process for workover oil pipes and sucker rods, and specifically discloses: firstly using 20-square clean waterKilling the well, heating water to 80-90 deg.C by … … steam heat source device, and killing at 1m per hour3-2m3The flow to the sucker rod purger water supply, wax and sump oil that the sucker rod outer wall was tied along with rivers flow to screen pipe department and return to the well head along with the overflow in the well, accomplish the washing to the sucker rod by the pump pumping to environmental protection box, accomplish through the washing of hot water realization to the oil pipe outer wall on the same principle, however the not enough that this application exists are: (1) the method has the advantages that the method of cleaning by adopting hot water consumes a large amount of water, resources are wasted, and a large amount of water is injected into the well in the cleaning process, so that the large amount of water injected in the cleaning process needs to be pumped out firstly during the operation of the pumping unit, and the waste of useless work in the operation of the pumping unit is caused; (2) the hot water with the temperature of 80-90 ℃ can not completely melt the oil wax and clean the oil wax due to low temperature; (3) this application can only realize the washing of sucker rod and oil pipe outer wall, can't realize wasing the oil pipe inner wall.
There are some problems in the current oil well repair process, as follows:
1. at present, the function of a device used in the cleaning process is single, the cleaning effect is poor after the cleaning of the current cleaning device, no equipment with the cleanable sucker rod, the inner wall of the oil pipe and the outer wall of the oil pipe exists, and a novel cleaning device in the well repairing process is necessary to be provided for the effective operation of the petroleum production.
2. When the pump inspection operation and the cleaning process of the pumping unit well are carried out, a large amount of crude oil is pulled out of the pumping rod and is taken out of a well mouth along with the pumping rod string, the crude oil resource is greatly wasted, and the economic benefit is damaged.
3. In the prior art, the well is required to be pressurized by clear water before the oil well is repaired, the oil well cannot be repaired in time, the working efficiency is reduced, and meanwhile, the well-killing fluid can pollute an oil layer and influence the normal oil production of the repaired oil well.
4. Because the existing oil well workover needs clean water to kill the well, after the oil well workover, when the oil well is pumped, the liquid which is pumped out at the beginning is the water which is injected in the past, a large amount of time is needed for pumping out, and all the liquid is useless, so that the resource waste is caused.
5. When using high temperature paraffin removal car to carry out sucker rod paraffin removal at present, the place after the paraffin removal all can be polluted, and current prevention method is: the method has the advantages that the effect is limited, secondary pollution is easily caused by laying the anti-seepage cloth or digging the overflow ditch on the ground surface, the paraffin removal work is carried out on the ground surface, the construction time is long, and meanwhile, the paraffin removal vehicle needs to work for a long time, so that the energy consumption is very high, and the environment is not favorable.
6. In the prior art, when the sucker rod and the oil pipe are cleaned, the sucker rod needs to be taken out from the ground one by one, the sucker rod continues to work after being cleaned, a large amount of heat energy is consumed in the process, and meanwhile, the sucker rod cannot work in the cleaning process, so that the oil pumping work is not continuous.
7. At present, in the process of pump inspection operation and cleaning operation of an oil pumping well, a large amount of hydrogen sulfide and other gases exist in the oil pumping well, potential safety hazards such as ignition and explosion exist during maintenance and cleaning, a great safety problem exists in the construction process, and meanwhile, the environment can be polluted due to the fact that a large amount of hydrogen sulfide gas is exposed during maintenance and cleaning, and the environment-friendly oil pumping well cleaning method is not in line with the current environment-friendly concept.
8. At present, in the paraffin removal process, a paraffin removal vehicle and various tools are used, and seepage-proofing cloth used in the cleaning process, well site cleaning after conventional operation well construction, oil and soil recovery and treatment and the like all need economic expenditure, so that the economic investment is very large, and the economic benefit is not favorably improved.
In summary, in the present oilfield workover operation, there are many problems in the field construction process, which results in resource waste, and in order to solve the above problems and improve the working efficiency and economic benefits of the oilfield workover operation, it is necessary to provide a novel device applied to the oilfield workover operation.
Disclosure of Invention
In order to overcome the defects in the background technology, the invention discloses a pollution-free high-temperature nitrogen cleaning operation method and a device for an oil pumping well, the pollution-free high-temperature nitrogen cleaning operation method for the oil pumping well takes high-pressure water injection, high-temperature nitrogen injection, a closed continuous cleaning technology and a cleaning liquid recovery technology as cores, oil wax is washed by hot melting of high-temperature nitrogen and high-temperature steam of high-pressure hydraulic injection, finally, the closed cleaning of an oil pumping rod, the inner wall of an oil pipe and the outer wall of the oil pipe is realized, the cleaning liquid can be completely recovered, and the waste of crude oil is zero; the pollution-free high-temperature nitrogen cleaning device for the pumping well is multifunctional special equipment integrating the functions of a pump truck, a high-temperature paraffin removal truck and a water tank truck, and provides a power source for high-pressure hydraulic injection and high-temperature steam closed continuous cleaning of a pumping rod, the inner wall of an oil pipe and the outer wall of the oil pipe.
The technical scheme for realizing the invention is as follows:
a pollution-free high-temperature nitrogen cleaning operation method for an oil pumping well is characterized in that high-temperature nitrogen generated by a nitrogen making machine and steam made by a high-pressure jet water or a steam machine are mixed in proportion to form high-temperature nitrogen and steam mixed gas, the high-temperature nitrogen and steam mixed gas is pressurized, pollution-free and closed continuous cleaning operation is respectively carried out on a pumping rod, the inner wall of the oil pipe and the outer wall of the oil pipe by a box body integrated type oil pumping well pollution-free high-temperature nitrogen cleaning device integrating a pumping rod closed cleaning device, an oil pipe inner wall cleaning device, an oil pipe outer wall cleaning device, a nitrogen making room, an operation room and a generator set, waste gas and liquid after cleaning, namely oil-water mixture passes through a liquid-gas separator, waste water flows into a positive-negative pressure recovery tank to be collected, the oil flows into a large four-way of a well head to be converged with a crude oil output pipeline, and complete return of cleaning liquid and zero waste of crude oil are obtained.
The pumping well pollution-free high-temperature nitrogen cleaning operation method has the advantage that the addition amount of high-pressure jet water or water vapor is 4-10%.
The pumping well pollution-free high-temperature nitrogen cleaning operation method has the advantage that the addition amount of high-pressure injection water or water vapor is 5%.
The pollution-free high-temperature nitrogen cleaning operation method for the pumping well comprises the step of pressurizing a mixed gas of high-temperature nitrogen and water vapor to 2-7 MPa.
The high-temperature nitrogen cleaning operation method for the oil pumping well has the advantage that the temperature of the high-temperature nitrogen is 140-160 ℃.
The nitrogen purity of the oil pumping well pollution-free high-temperature nitrogen cleaning operation method is 95-98%.
The nitrogen purity of the oil pumping well pollution-free high-temperature nitrogen cleaning operation method is 97%.
The pollution-free high-temperature nitrogen cleaning operation method for the pumping well comprises the following steps:
s1: placing the container of the pollution-free high-temperature nitrogen cleaning device of the pumping well on transportation equipment and hauling the container to a well site of the pumping well;
s2: starting a nitrogen making unit in the pollution-free high-temperature nitrogen cleaning device of the pumping well to prepare high-temperature nitrogen with the temperature of 140-160 ℃, wherein the purity of the nitrogen is 95-98%;
s3: injecting high-pressure water into the high-temperature nitrogen pipeline to instantaneously vaporize water to form a high-temperature nitrogen and steam mixed gas or directly converging water vapor prepared by a steam engine and the high-temperature nitrogen, pressurizing the mixed gas to 2-7 MPa, acquiring convergence and output of the high-temperature nitrogen and the water vapor through a three-way valve, and finally forming the high-temperature nitrogen and steam mixed gas, wherein the water vapor content is 4-10%;
s4: cleaning operation:
cleaning a sucker rod, namely installing a sucker rod closed cleaning device at a wellhead, and spraying mixed gas of high-temperature nitrogen and water vapor out of a spray hole in the sucker rod closed cleaning device to perform closed cleaning operation on the sucker rod;
b, cleaning the outer wall of the oil pipe, namely installing an oil pipe outer wall cleaning device on a wellhead blowout preventer, and spraying mixed gas of high-temperature nitrogen and water vapor out through a spray hole in the oil pipe outer wall cleaning device to perform closed cleaning operation on the outer wall of the oil pipe;
c, cleaning the inner wall of the oil pipe: the oil pipe inner wall cleaning device is connected with a wellhead paraffin removal valve or a production valve, and the mixed gas of high-temperature nitrogen and water vapor is sprayed out through a spraying hole in the oil pipe inner wall cleaning device to carry out closed cleaning operation on the oil pipe inner wall.
The device for cleaning the operation method by the aid of the pollution-free high-temperature nitrogen of the pumping well comprises a box body, the box body is internally divided into a nitrogen making room, an operation room and a generator set, nitrogen making equipment is arranged in the nitrogen making room, a steam engine, an air compressor, a generator, a water tank and a water pump are arranged in the generator set respectively, the generator provides electric power support for the nitrogen making equipment, the steam engine, the air compressor and the water pump, the nitrogen making equipment and the steam engine are connected with pipelines respectively and are discharged by external pipelines after being collected through a three-way valve, and a general control operation table for controlling the operation of the nitrogen equipment, the steam engine, the air compressor, the generator and the water pump is arranged in the operation room.
The device for the pollution-free high-temperature nitrogen cleaning operation method of the pumping well comprises a pipe body, a movable sealing valve, a central pipe, an access port and a discharge port, wherein the access port is arranged on one side of the upper part of the pipe body, the discharge port is arranged on one side of the lower part of the pipe body, valves are arranged on the access port 25 and the discharge port on the pipe body, the movable sealing valve is arranged on the upper part of the pipe body, a connecting external thread is arranged on the outer wall of the lower end of the pipe body, the central pipe extending downwards is arranged in the pipe body, a plurality of spray holes are orderly arranged on the outer wall of the central pipe at intervals, and the central pipe can be continuously spliced and prolonged to meet the requirement of the underground depth;
the sucker rod closed cleaning device consists of a small cylinder, a jet hole and an air pipe interface, wherein the upper end of the small cylinder is provided with a through interface, the outer side wall of the small cylinder is provided with the air pipe interface, and the inner wall of the small cylinder is orderly provided with a plurality of jet holes at intervals;
the oil pipe outer wall cleaning device is composed of a large cylinder, jet holes and an air pipe connector, connecting flanges are arranged at the upper end and the lower end of the large cylinder respectively, a through hole is formed in the surface of the upper end of the large cylinder, the air pipe connector is arranged on the outer side wall of the large cylinder, and a plurality of jet holes are arranged on the inner wall of the large cylinder at intervals in order.
The oil pumping well pollution-free high-temperature nitrogen cleaning operation method has the advantages that the core is high-pressure water injection, high-temperature nitrogen injection, closed continuous cleaning technology and cleaning liquid recovery technology, oil wax is washed by hot melting of high-temperature nitrogen and high-temperature water vapor of high-pressure hydraulic injection, finally, closed online cleaning of the oil pumping rod, the inner wall of the oil pipe and the outer wall of the oil pipe is realized, and cleaning liquid can be completely recovered.
The pollution-free high-temperature nitrogen cleaning device for the pumping well is multifunctional special equipment integrating the functions of a pump truck, a high-temperature paraffin removal truck and a water tank truck, and provides a power source for high-pressure hydraulic injection and high-temperature steam closed continuous cleaning of a pumping rod, the inner wall of an oil pipe and the outer wall of the oil pipe.
Compared with the conventional well repairing operation process, the pollution-free high-temperature nitrogen cleaning operation method and the pollution-free high-temperature nitrogen cleaning device for the pumping well have the following advantages:
1. the pollution-free operation construction is realized, and the recovery rate of the pipeline cleaning liquid and the wellhead return liquid can reach 100 percent; when the sucker rod and the outer wall of the oil pipe are cleaned, the sucker rod sealing cleaning device and the oil pipe outer wall cleaning device are used, mixed gas of high-temperature nitrogen and water vapor respectively flows downwards along annular spaces between the sucker rod and the oil pipe and between the oil pipe and a sleeve, oil stains on the outer walls of the sucker rod and the oil pipe are melted by the high-temperature nitrogen, and then the oil stains are washed off by a certain proportion of water vapor in the mixed gas; when the inner wall of an oil pipe is cleaned, oil stain on the inner wall of the oil pipe is thermally melted and washed by the oil pipe inner wall cleaning device, then the waste liquid is recovered into a negative pressure recovery tank by the negative pressure waste liquid recovery device and then is output by an oil well station-entering manifold, so that fluid in a well is ensured to enter an appointed pipe network of the oil well through transfer, the whole process is completed underground, the pollution-free construction of ground operation is realized, and the recovery rate of the returned liquid at a well mouth can reach 100%;
2. when entering a well, the mixed gas of high-temperature high-pressure nitrogen and water vapor has high steam temperature, high pressure, small water consumption and good cleaning effect, the high water vapor temperature is extracted by high-temperature nitrogen, and simultaneously oil stains can be washed and carried by adding water vapor, so that the cleaning effect is more thorough, and the defect that the dirt cannot be washed and discharged because only nitrogen is used for cleaning in the prior art is overcome;
3. according to the operation method, clear water is not needed for killing the well before the oil well is repaired, and only the sucker rod airtight cleaning device, the oil pipe outer wall cleaning device and the oil pipe inner wall cleaning device are required to be sequentially installed at the wellhead, so that timely repairing is guaranteed, the working efficiency is improved, and pollution to an oil layer caused by injecting killing fluid into the well by the traditional killing well is avoided;
4. after the oil well is repaired and the pumping is started, the abnormal production time of water content is shortened, namely the problem that the pumping unit works without work due to the fact that a large amount of water injected by the previous well killing needs to be pumped out when the pumping unit works by the traditional well killing process is solved, and the working efficiency is improved;
5. the cleaned waste gas-liquid, namely the oil-water mixture, is reversely discharged through the large four-way at the wellhead through the annulus, the waste gas-liquid, namely the oil-water mixture, passes through the liquid-gas separator, the waste water flows into the positive-negative pressure recovery tank to be collected, and the oil flows into the large four-way at the wellhead to be converged with the crude oil output pipeline, so that the cleaned crude oil is completely recovered, and zero waste is realized.
6. The high-pressure hydraulic jet and high-temperature steam closed continuous cleaning replaces ground paraffin removal of a high-temperature paraffin removal vehicle, and meanwhile, the construction time is shortened, and the energy consumption is reduced;
7. the matched ejector equipment of the special oil pipe inner wall cleaning device disclosed by the invention can be used for realizing high-speed and high-efficiency cleaning of the oil pipe inner wall, overcoming the defect that most of traditional workover operations can only clean the sucker rod or the oil pipe outer wall, and making up the defects of the current workover operation;
8. the downhole tool of the invention: the sucker rod closed cleaning device, the oil pipe outer wall cleaning device and the oil pipe inner wall cleaning device have the characteristics of scale prevention, corrosion resistance, safety and reliability;
9. the invention can realize the closed continuous cleaning of the sucker rod, the outer wall of the oil pipe and the inner wall of the oil pipe, reduce the heat energy loss and ensure the operation continuity;
10. the mixed gas of high-temperature nitrogen and water vapor has good effect of dissolving hydrogen sulfide, avoids explosion and ensures the safety of operation and construction;
11. the operation method adopts a mode of adding a small amount of water into high-temperature nitrogen, and is environment-friendly and energy-saving.
12. The pollution-free high-temperature nitrogen cleaning operation method and the pollution-free high-temperature nitrogen cleaning device for the pumping well have great economic benefits and market values:
(1) the device belongs to closed cleaning in the cleaning process, the economic investment of the anti-seepage cloth in the cleaning process can be reduced by closed cleaning, in the traditional conventional paraffin removal operation, the anti-seepage cloth is used for only 1 time for each well, and the anti-seepage cloth can be used for 2 to 3 times for each well when the device is used for paraffin removal, so that the economic expenditure of the anti-seepage cloth is reduced, and the phenomenon that a large amount of crude oil is brought out of a well mouth along with a sucker rod string in the pulling-out process when the sucker rod is pulled out and cleaned in the traditional construction process, a large amount of crude oil resources are wasted, and the loss of economic benefits is caused is avoided;
(2) when the paraffin removal operation is carried out, the residual paraffin-containing liquid flows into the collecting tank and is finally discharged into the oil drainage pool, no residual liquid can fall to the ground to pollute the environment, when the device is in operation, the lifted oil rod and the lifted oil pipe are cleaned in the range of a well head at the first time, the residual liquid is discharged into the well, the external part basically generates no oil soil, the crude oil basically has no loss, and the problems of large crude oil loss, soil pollution and environment damage in the traditional operation are effectively solved, the conventional operation cleaning operation at the well depth of 2000 meters, about 1 to 1.5 tons of oil soil are generated after the construction of a single well, and about 0.5 to 1.5 tons of crude oil are lost, so compared with the traditional technology, the device has more environmental protection significance and economic benefit;
(3) the price of the conventional paraffin removal vehicle, the annual furnace washing cost and the annual furnace tube replacement cost are far higher than the cost of the pollution-free high-temperature nitrogen cleaning device for the integrated box-type pumping well, the cost is favorably reduced, the economic benefit is better realized, the traditional operation needs to convey and boil the oil tube rods, the process of pricking and washing the boiler vehicle is complex to operate, certain cost is correspondingly generated, the device does not need to press and wash the well in advance when being used for lifting the tubular column, and the oil tube and the rod need not to be conveyed to an oil tube factory for boiling for the second time after being washed, so that the economic expenditure is reduced;
(4) the device has high efficiency when cleaning and detecting operations are carried out, when a traditional high-temperature vehicle carries out conventional 1500-meter pump hanging cleaning and detecting operations and paraffin removal, single-well construction can be carried out for 6-8 hours in winter and 4-6 hours in summer on average, and the paraffin removal work can be directly finished by using the device, so that the working efficiency and the effect are excellent;
(5) the conventional cleaning work does not influence the conventional cleaning operation within 3 days, the device disclosed by the invention occupies 2.5 days of well completion when cleaning work is carried out, 4-8 hours are more than the conventional operation, the oil well can be recovered to a normal working state as soon as possible, and economic benefits are created for petroleum enterprises earlier;
(6) the well site cleaning after the conventional operation well construction needs professional teams, after the device disclosed by the invention is used for cleaning wax, the well site can reach the standard only by simply cleaning, the investment cost is far less than that after the conventional operation construction, and the economic benefit is great.
13. According to the pipeline clamping and placing device, the pipeline clamping and placing required in the operation processes of paraffin removal and the like can be realized by arranging the pipeline clamping groove and the pipeline clamping and placing piece on the upper surface of the box body, so that the problem that the pipeline is required to be used independently or transported in the traditional operation process is solved, the pipeline clamping and placing piece can realize the fixed placing of the pipeline in the transportation process, and the situations that the pipeline is dropped, lost and the like in the transportation process are avoided;
through setting up the storage chamber and setting up the baffle in the storage chamber, can realize placing of operation panel, it is more convenient, swift to issue the execution command formula to the operation panel.
Put bottom plate, wheel, bracing piece through setting up the card, can realize the support of whole box, transport the car of box and after putting the bottom plate with the box uninstallation to the card, the car of transporting can leave the well site, carries out other transportation work, improves work efficiency. The clamping floor is provided with the slots matched with the insertion rods of the box body, so that the box body can be fixedly supported on the clamping bottom plate, and the box body is prevented from moving to influence the work.
Through setting up the semicircular plate, can make the staff can be with the light convenient transfer of pipeline on box upper portion to ground convenient operation, also can make things convenient for the recovery transport of pipeline.
The invention has reasonable structural design, ingenious and novel conception, good cleaning effect, high cleaning speed, complete automation realization and sealing, can thoroughly clean the sucker rod, effectively solves the problems that an oil drain pipe column does not have an oil drain device, the oil drain device can not be normally opened and the oil pipe column is seriously blocked by wax deposition, eliminates potential safety hazards and reduces the labor intensity of workers. The invention can avoid the problems of splashing of water, waste of water resource, splashing of crude oil, oil soil generation, environmental pollution and the like in the traditional cleaning process, can effectively reduce the pump inspection rate of the oil well by regularly cleaning the oil well, improves the utilization rate of the oil well, really saves energy and reduces consumption, is green and environment-friendly, and has the advantages of high working efficiency, strong practicability, low economic investment and easy large-scale popularization and application.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1 is a schematic view of the overall structure of the present invention.
Fig. 2 is a schematic view of the internal structure of the case of the present invention.
Fig. 3 is a schematic view of the structure of the case of the present invention.
Fig. 4 is a schematic view of the structure of the card placement base of the present invention.
FIG. 5 is a schematic structural view of the cleaning device for the inner wall of the oil pipe.
FIG. 6 is a schematic view of the structure of the cleaning device for sucker rod of the present invention.
Fig. 7 is a schematic structural diagram of the cleaning device for the outer wall of the oil pipe.
Fig. 8 is a schematic view of the pipeline handling structure of the present invention.
Fig. 9 is a process diagram of the present invention.
Figure 10 is a schematic view of the present invention tubing lift process.
Fig. 11 is a schematic view of the lifter process of the present invention.
In the figure, 1, a pipeline clamping groove, 2, a pipeline clamping and releasing piece, 3, a box body, 4, a wheel, 5, a clamping and releasing bottom plate, 6, a traction connector, 7, a placing groove, 8, a limiting pressing plate, 9, a groove, 10, a fixing rod, 11, an expanding nut, 12, an expanding chuck, 13, a threaded hole, 14, an adjusting screw rod, 15, a door, 16, a storage cavity, 17, a storage cavity door, 18, a partition plate, 19, a jack, 20, an inserting rod, 21, a slot, 22, a clamping and releasing groove, 23, a supporting rod, 24, an oil pipe inner wall cleaning device, 25, an access port, 26, a valve, 27, a movable sealing valve, 28, a pipe body, 29, a discharge port, 30, a connecting external thread, 31, a central pipe, 32, a connector, 33, a sucker rod sealing cleaning device, 34, a small cylinder, 35, a spray hole, 36, an air pipe connector, 37, a connecting flange, 38, a through hole, 39, an outer wall cleaning device, 40. big cylinder, 41 vertical rod, 42 perforation, 43 semi-annular plate, 44 semi-annular groove.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
A pollution-free high-temperature nitrogen cleaning operation method for an oil pumping well is characterized in that high-temperature nitrogen generated by a nitrogen making machine and steam made by a high-pressure jet water or a steam machine are mixed in proportion to form high-temperature nitrogen and steam mixed gas, the high-temperature nitrogen and steam mixed gas is pressurized, pollution-free and closed continuous cleaning operation is respectively carried out on a pumping rod, the inner wall of the oil pipe and the outer wall of the oil pipe by a box body integrated type oil pumping well pollution-free high-temperature nitrogen cleaning device integrating a pumping rod closed cleaning device 33, an oil pipe inner wall cleaning device 24, an oil pipe outer wall cleaning device 39, a nitrogen making room, an operation room and a generator set, waste gas and liquid after cleaning, namely oil-water mixture passes through a liquid-gas separator, waste water flows into a positive-negative pressure recovery tank to be collected, oil flows into a large four-way of a well head to be converged with a crude oil output pipeline, and complete return of cleaning liquid and zero waste of crude oil are obtained.
The pumping well pollution-free high-temperature nitrogen cleaning operation method has the advantage that the addition amount of high-pressure jet water is 4-10%.
The pumping well pollution-free high-temperature nitrogen cleaning operation method has the advantage that the addition amount of the high-pressure jet water is 5%.
The pollution-free high-temperature nitrogen cleaning operation method for the pumping well comprises the step of pressurizing a mixed gas of high-temperature nitrogen and water vapor to 2-7 MPa.
The high-temperature nitrogen cleaning operation method for the oil pumping well has the advantage that the temperature of the high-temperature nitrogen is 140-160 ℃.
The nitrogen purity of the oil pumping well pollution-free high-temperature nitrogen cleaning operation method is 95-98%.
The nitrogen purity of the oil pumping well pollution-free high-temperature nitrogen cleaning operation method is 97%.
The pollution-free high-temperature nitrogen cleaning operation method for the pumping well comprises the following steps:
s1: placing the container of the pollution-free high-temperature nitrogen cleaning device of the pumping well on transportation equipment and hauling the container to a well site of the pumping well;
s2: starting a nitrogen making unit in the pollution-free high-temperature nitrogen cleaning device of the pumping well to prepare high-temperature nitrogen with the temperature of 140-160 ℃, wherein the purity of the nitrogen is 95-98%;
s3: injecting high-pressure water into the high-temperature nitrogen pipeline to instantaneously vaporize water to form a high-temperature nitrogen and steam mixed gas or directly converging water vapor prepared by a steam engine and the high-temperature nitrogen, pressurizing the mixed gas to 2-7 MPa, acquiring convergence and output of the high-temperature nitrogen and the water vapor through a three-way valve, and finally forming the high-temperature nitrogen and steam mixed gas, wherein the water vapor content is 4-10%;
s4: cleaning operation:
cleaning the sucker rod, namely installing a sucker rod closed cleaning device 33 at a wellhead, and spraying mixed gas of high-temperature nitrogen and water vapor out of a spray hole 35 in the sucker rod closed cleaning device 33 to perform closed cleaning operation on the sucker rod;
b, cleaning the outer wall of the oil pipe, namely installing an oil pipe outer wall cleaning device 39 on a wellhead blowout preventer, and ejecting mixed gas of high-temperature nitrogen and water vapor out through an ejection hole 35 in the oil pipe outer wall cleaning device 39 to perform closed cleaning operation on the outer wall of the oil pipe;
c, cleaning the inner wall of the oil pipe: the oil pipe inner wall cleaning device 24 is connected with a wellhead paraffin removal valve or a production valve, and the mixed gas of high-temperature nitrogen and water vapor is sprayed out through a spraying hole 35 in the oil pipe inner wall cleaning device 24 to carry out closed cleaning operation on the oil pipe inner wall.
The non-pollution high-temperature nitrogen cleaning device for the pumping well comprises a box body 3, the inside of the box body 3 is divided into a nitrogen making room, an operation room and a generator set, nitrogen making equipment is arranged in the nitrogen making room, a steam engine, an air compressor, a generator, a water tank and a water pump are respectively arranged in the generator set, the generator provides electric power support for the nitrogen making equipment, the steam engine, the air compressor and the water pump, the nitrogen making equipment and the steam engine are respectively connected with a pipeline, are connected and gathered through a three-way valve and then are discharged through an external pipeline, further, in order to facilitate on-site pipeline connection, an external pipeline is arranged on the outer side wall of the box body 3, the external pipeline is connected with the three-way valve for connecting and gathering the pipelines of the nitrogen making equipment and the steam engine, and a heat insulation layer made of rock wool is arranged on the outer surface of the external pipeline, the interface at the lower end of the external pipeline is provided with a valve, an air inlet is arranged at a position corresponding to a nitrogen-making room on the outer side wall of the box body 3, a heat radiation port is arranged at a position corresponding to a generator set on the outer side wall of the box body 3, and a master control operation table for controlling the operation of nitrogen equipment, a steam engine, an air compressor, a generator and a water pump is arranged in the operation room.
The oil pumping well pollution-free high-temperature nitrogen cleaning operation method comprises the steps that an oil pipe inner wall cleaning device 24 consists of a pipe body 28, a movable sealing valve 27, a central pipe 31, an inlet 25 and a discharge port 29, the inlet 25 is arranged on one side of the upper portion of the pipe body 28, the discharge port 29 is arranged on one side of the lower portion of the pipe body 28, valves 26 are arranged on the inlet 25 and the discharge port 29 on the pipe body 28, the movable sealing valve 27 is arranged on the upper portion of the pipe body 28, a connecting external thread 30 is arranged on the outer wall of the lower end of the pipe body 28, the central pipe 31 extending downwards is arranged in the pipe body 28, a plurality of injection holes 35 are arranged on the outer wall of the central pipe 31 at intervals in order, and the central pipe 31 can be continuously spliced and lengthened to meet the requirement of underground depth;
the sucker rod closed cleaning device 33 consists of a small cylinder 34, a jet hole 35 and an air pipe interface 36, wherein the upper end of the small cylinder 34 is provided with a through interface 32, the outer side wall of the small cylinder 34 is provided with the air pipe interface 36, and the inner wall of the small cylinder 34 is orderly provided with a plurality of jet holes 35 at intervals;
the cleaning device 39 for the outer wall of the oil pipe consists of a large cylinder 40, jet holes 35 and a gas pipe connector 36, connecting flanges 37 are respectively arranged at the upper end and the lower end of the large cylinder 39, a through hole 38 is arranged on the surface of the upper end of the large cylinder 39, the gas pipe connector 36 is arranged on the outer side wall of the large cylinder 39, and the inner wall of the large cylinder 39 is orderly provided with the jet holes 35 at intervals;
the pollution-free high-temperature nitrogen cleaning operation device for the pumping well is characterized in that a plurality of pipeline clamping grooves 1 are arranged at the upper part of a box body 3, a clamping bottom plate 5 is arranged at the lower part of the box body 3, clamping grooves 22 matched with the box body 3 are arranged on the upper surface of the clamping bottom plate 5, a plurality of corresponding inserting rods 20 are orderly arranged at intervals on two sides of the lower surface of the box body 3, inserting holes 19 are respectively arranged on the plurality of inserting rods 20, inserting grooves 21 corresponding to the inserting rods 20 on two sides of the lower surface of the box body 3 are respectively arranged on two sides of the inner bottom surface of the clamping groove 22 on the clamping bottom plate 5, the box body 3 is clamped in the clamping groove 22 on the clamping bottom plate 5 and is inserted into the inserting grooves 21 on the clamping groove 22 through the inserting rods 20 on the lower part of the box body 3, fixing rods 10 are arranged in the inserting holes 19 on the corresponding inserting rods 20 on two sides of the lower surface of the box body 3, and one end of each fixing rod 10 is provided with an expanding clamping head 12, the other end of the fixed rod 10 is provided with an expanding nut 11 in threaded connection with the fixed rod 10;
pumping well pollution-free high temperature nitrogen gas cleaning operation device be equipped with on 3 lateral walls of box with the storage chamber 16 of the corresponding indent formula between the operation, the storage chamber 16 of indent formula is inside to form the operation panel between the operation, storage chamber 16 is inside to be separated for the several holding tank by several baffle 18 deposit oil pipe inner wall belt cleaning device 24, the airtight belt cleaning device 33 of sucker rod and oil pipe outer wall belt cleaning device 39 respectively in the several holding tank be equipped with storage chamber door 17 on the storage chamber 16.
The pollution-free high-temperature nitrogen cleaning operation device for the pumping well is characterized in that a placing groove 7 is arranged on the upper portion of a box body 3, a plurality of pipeline clamping grooves 1 are orderly arranged in the placing groove 7 at intervals, two ends of each pipeline clamping groove 1 are of a sealed structure, a plurality of corresponding threaded holes 13 are orderly arranged on two sides of the outer side wall of the placing groove 7 at intervals, a limiting pressing plate 8 matched with the placing groove 7 in width is arranged on the upper portion of the placing groove 7, two sides of the limiting pressing plate 8 are respectively positioned outside the outer side wall of the placing groove 7, adjusting screw rods 14 matched with the threaded holes 13 on the outer side wall of the placing groove 7 are respectively arranged on the outer sides of two side walls of the limiting pressing plate 8, grooves 9 corresponding to the pipeline clamping grooves 1 on the placing groove 7 are orderly arranged on the lower surface of the limiting pressing plate 8 at intervals, and further, in order to clamp and take pipelines, 3 one side of box is equipped with the staircase, reminds in order to realize the warning 3 upper portion one side of box is equipped with the warning light, the warning light supplies power through the inside generator of box 3.
Pumping well pollution-free high temperature nitrogen gas cleaning operation device the card is put 5 lower parts of bottom plates and is equipped with wheel 4 the card is put 5 front ends of bottom plates and is equipped with and pulls connector 6 the card is put 5 lower surface both sides intervals of bottom plates and is equipped with several bracing pieces 23 in order, further bracing piece 23 is detachable construction.
The pollution-free high-temperature nitrogen cleaning operation device for the pumping well is characterized in that upright rods 41 are respectively arranged on two sides of the tail part of the upper surface of the box body 3, semi-annular grooves 44 are respectively arranged on two sides of the upper surface of the clamping bottom plate 5, semi-annular plates 43 are arranged in the semi-annular grooves 44, and through holes 42 matched with the upright rods 41 on two sides of the tail part of the upper surface of the box body 3 are formed in the front ends of the semi-annular plates 43.
When the pumping well pollution-free high-temperature nitrogen cleaning operation device is implemented, when a box body 3 is installed for transportation, the box body 3 is placed in a clamping groove 22 on a clamping bottom plate 5 through a hoisting device, an inserting rod 20 at the lower part of the box body 3 is inserted into an inserting groove 21 on the clamping groove 22, after the box body 3 is clamped, one end of a fixing rod 10 is inserted into a corresponding inserting hole 19 on the inserting rod 20 at the other side of the lower part of the box body 3 through an inserting hole 19 on the inserting rod 20 at one side of the lower part of the box body 3, one end of the fixing rod 10 is limited through an expanding nut 11, the box body 3 can be limited by the fixing rod 10, and when in transportation, the wheel 4 on the clamping bottom plate 5 can be transported and moved through the clamping head by connecting a traction connector 6 at the front side of the clamping bottom plate 5 with an upper headstock;
after the device is moved to an operation site, the support rod 23 is supported at the lower part of the clamping bottom plate 5 to realize the support protection of the device, a worker climbs to the upper part of the box body 3 through the escalator, other people assist in taking out the semi-annular plates 43 in the semi-annular grooves 44 at the two sides of the clamping bottom plate 5, the front ends of the semi-annular plates 43 are sleeved on the vertical rods 41 at the two sides of the upper surface of the box body 3 by utilizing the through holes 42 at the front ends of the semi-annular plates 43, the upper ends of the semi-annular plates 43 are fixed through the vertical rods 41 to form inclined slideways, the worker at the upper part of the box body 3 rotates the adjusting screw rods 14 out of the threaded holes 13 at the two sides of the placing groove 7 through the adjusting screw rods 14 at the two sides of the knob limiting pressure plate 8, after the limiting pressure plate 8 is taken out of the placing groove 7, the worker can take out pipelines required for cleaning the oil pipes from the pipeline clamping grooves 1 on the placing groove 7, one end of the taken out pipelines is placed at the front part of the slideways formed by the semi-annular plates 43, the pipeline can slide to the ground along a slide way formed by the semi-annular plate 43 by slowly pushing the pipeline, after the pipeline is taken down, one end of the pipeline is connected with a gathering interface on the box body 3, then the storage cavity door 17 at one side of the box body 3 is opened, the oil pipe inner wall cleaning device 24, the sucker rod closed cleaning device 33 and the oil pipe outer wall cleaning device 39 are taken out from the storage cavity 16 and are installed at a wellhead, and the pipeline is respectively connected with the oil pipe inner wall cleaning device 33 and the oil pipe outer wall cleaning device 39 to carry out installation and cleaning operation;
aiming at the installation of the sucker rod closed cleaning device 33 and the closed cleaning of the sucker rod, the sucker rod lifting process diagram of the invention is described by combining the attached figure 11: firstly, a polish rod and a blowout prevention valve on a well mouth are disassembled, a sucker rod closed cleaning device 33 is sleeved, the sucker rod closed cleaning device 33 is connected by adopting 5000psi 395 flanges, the upper part of the sucker rod closed cleaning device 33 is connected by 250 slips, a high-temperature nitrogen and water vapor mixed gas external pipeline on the outer wall of a box body 3 is connected with a gas pipe connector 36 on the outer side wall of a small column 34 of the sucker rod closed cleaning device 33 through a plurality of heat-preservation connecting pipelines of which the outer surfaces are provided with aluminum silicate heat-preservation coatings, the high-temperature nitrogen and water vapor mixed gas is jetted out through a plurality of jet holes 35 which are orderly arranged at intervals on the inner wall of the small column 34 to carry out closed cleaning on the sucker rod, the cleaning effect is observed, the cleaning pressure is adjusted, the best effect is achieved, and the standard of descending of the well is achieved; the cleaned waste gas-liquid, namely the oil-water mixture is reversely discharged through the large four-way at the wellhead through the annulus, and as shown in the process schematic diagram of the invention shown in the attached figure 9, the waste gas-liquid, namely the oil-water mixture passes through the liquid-gas separator, the waste water flows into the positive-negative pressure recovery tank for collection, and the oil flows into the large four-way at the wellhead to be converged with the crude oil output pipeline, so that the cleaned crude oil is completely recovered, and the waste is zero.
Aiming at the closed cleaning of the inner wall and the outer wall of the oil pipe, the installation of the cleaning device 39 for the outer wall of the oil pipe and the installation of the cleaning device 24 for the inner wall of the oil pipe, the oil pipe lifting process diagram of the invention is described by combining with a figure 10: firstly, an oil pipe outer wall cleaning device 39 is installed and cleaned, the oil pipe outer wall cleaning device 39 is installed on a wellhead blowout preventer through 5000psi 395 flanges, an external pipeline of high-temperature nitrogen and water vapor mixed gas on the outer wall of a box body 3 is connected with an air pipe connector 36 on the outer side wall of a large cylinder 39 of the oil pipe outer wall cleaning device 39 through a plurality of heat-insulation connecting pipelines of which the outer surfaces are provided with aluminum silicate heat-insulation coatings, the oil pipe starts to be lifted, when the oil pipe is lifted, the high-temperature nitrogen and water vapor mixed gas is ejected through a plurality of ejection holes 35 which are orderly arranged on the inner wall of the large cylinder 39 at intervals to carry out closed cleaning on the outer wall of the oil pipe, the cleaning effect is observed, the cleaning pressure is adjusted, the best effect is achieved, and the standard of descending is achieved; the cleaned waste gas-liquid, namely the oil-water mixture is reversely discharged through the large four-way at the wellhead through the annulus, and as shown in the process schematic diagram of the invention shown in the attached figure 9, the waste gas-liquid, namely the oil-water mixture passes through the liquid-gas separator, the waste water flows into the positive-negative pressure recovery tank for collection, and the oil flows into the large four-way at the wellhead to be converged with the crude oil output pipeline, so that the cleaned crude oil is completely recovered, and the waste is zero.
Aiming at the installation and cleaning of the cleaning device 24 for the inner wall of the oil pipe, the oil pipe lifting process diagram of the invention is described in combination with FIG. 10: after the sucker rod is lifted, a sucker rod closed cleaning device 33 (comprising a wellhead mounting tool and a well screen pipe) is removed, an oil pipe blowout preventer is mounted (only limited to an oil well opened by an oil drainer), a wax removal valve or a production valve at the wellhead is connected with an oil pipe inner wall cleaning device 24, the oil pipe inner wall cleaning device 24 is connected in a 5000psi 395 flange mode, an external pipeline of high-temperature nitrogen and water vapor mixed gas on the outer wall of a box body 3 is connected with an inlet 25 of the oil pipe inner wall cleaning device 24 through a plurality of heat-insulation connecting pipelines with aluminum silicate heat-insulation coatings on the outer surfaces, one end of a recovery pipeline is connected to a discharge port 29 on the oil pipe inner wall cleaning device 24, the other end of the recovery pipeline is connected with a positive-negative pressure recovery tank, the high-temperature nitrogen and water vapor mixed gas flows into a central pipe 31 inside a pipe body 28 of the oil pipe inner wall cleaning device 24 through the pipeline, and the cleaning of the inner wall of the oil pipe is realized through a plurality of jet holes 35 arranged on the central pipe 31 at intervals, the cleaned waste liquid flows through the central pipe 31 and the gap between the oil pipes, flows through the discharge port 29 on the oil pipe inner wall cleaning device 24 and flows into the negative pressure recovery tank through the recovery pipeline; for an oil well with an oil drainer not opened or an oil drainer not lowered, the oil pipe plug is inserted into the oil pipe coupling, then the steam recovery integrated pipe is inserted into the oil pipe for 100-200m, at the moment, the negative pressure recovery device is started, oil-water mixture in the oil pipe is instantly sucked into the negative pressure tank, the pipeline is lifted out about 10 seconds, and normal pipe lifting operation is carried out. Repeating the above operations for 10-20 oil pipes each time, thereby ensuring no oil stain overflow in the oil pipes during the pipe lifting operation;
during or after the cleaning operation, the oil transfer pump can be automatically opened according to the liquid storage amount in the temporary storage tank, and the oil-water mixture in the temporary storage tank is output through the oil well station-entering manifold. Thereby ensuring that the fluid in the well enters the appointed pipe network of the oil well through transit.
The negative pressure waste liquid recovery device comprises a positive pressure recovery tank and a negative pressure recovery tank, wherein the vacuum degree in the negative pressure recovery tank reaches-0.09 Mpa by using the vacuum negative pressure principle, so that the waste liquid is absorbed into the tank instantly and temporarily stored; the total power of the whole machine is 7.5kw, the size of the whole machine is 2m multiplied by 2.2m multiplied by 2m, and the working pressure is as follows: -0.02-0.09 MPa, displacement values: and (5) carrying out 30-100m of cultivation per hour, wherein the capacity of the negative pressure tank is 2.5 cubic meters.
The steam engine has the equipment model of Sendaxin RYZQ130 (CZ-RYZQ 130), the working pressure is 2-6MPa, the steam temperature is 130-170 ℃, and the steam quantity is 1T/h; the working pressure of the feed pump is 6MPa, and the discharge capacity is 1.5 m/h; flow Q12.6-39.6 m/h, adopt "instantaneous vaporization" technique, no boiler design principle, built-in intake water pump, EMF-electromagnetic induction combustion system, have characteristics such as fool's automatically controlled, instant heating type, modular design, complete machine does not have external power supply, portable service, last gassing can reach 30 kilograms, it is sufficient and famous with big pressure, tolerance, the same model type of import far beyond foreign country, it is the good instrument that industry heavily greasy dirt washs and severe cold weather unfreezes.
The air compressor of the invention has the working pressure: 1-25 MPa, discharge capacity: and (5) carrying out downward cultivation at 1-10 m/min.
The total power of the nitrogen making machine is 25kw, the working pressure is as follows: 1MPa, flow: and (3) carrying out downward cultivation at 1-10 m/min, wherein the purity is as follows: 95 to 98 percent.
The diesel generating set disclosed by the invention has the power of 200 kw.
The steam pipeline of the invention resists pressure of 15Mpa, resists heat of 185 ℃, and the length of the steam pipeline is 40 m.
The steam engine and the water supply pump of the invention have two power supplies, the steam engine can select and install the steam engine with two energy sources of fuel oil or electricity according to the actual demand, and the water supply quantity and the water supply pressure of the water pump and the air supply quantity of the steam engine are all automatically controlled. The box body is provided with a water tank to meet the requirements of steam engine water and pump engineering water; the negative pressure tank is responsible for recovering the cleaning liquid and returning the liquid from the well mouth.
The invention discloses a technical specification of a pollution-free high-temperature nitrogen cleaning operation device for an oil pumping well, which comprises the following steps:
1. the pollution-free high-temperature nitrogen cleaning operation device for the pumping well is suitable for the oil well with the well depth of less than or equal to 3000 m;
2. the temperature of the working environment is-40 ℃ to + 40 ℃;
3. the pollution-free high-temperature nitrogen cleaning operation technology of the pumping well is completely applied, and the oil drain with special functions is required to be applied to the pumping well;
4. a wellhead device: the height is less than 450mm, and the weight is less than 40 Kg.
The pollution-free high-temperature nitrogen cleaning operation method for the pumping well, disclosed by the invention, is used for preparing high-temperature nitrogen at 140-160 ℃, the temperature of the mixed gas of the high-temperature nitrogen and water vapor is gradually reduced in the process of injecting the mixed gas into the underground according to the actual oilfield exploitation site situation, the high-temperature nitrogen is designed at 140-160 ℃ according to the temperature reduction rule so as to meet the requirement that the water vapor is not liquefied when the mixed gas is at the deepest operation depth, meanwhile, when the temperature of the high-temperature nitrogen is too high, namely higher than 160 ℃, parts of underground equipment are damaged and leaked, and when the temperature of the high-temperature nitrogen is too low, namely lower than 140 ℃, the temperature of the mixed gas is attenuated to be lower than 100 ℃, so that oil stain flushing operation cannot be finished.
The purity of the nitrogen prepared by the nitrogen preparation equipment is 95-98%, if the purity of the nitrogen is too low, mixed gas is contained, the nitrogen is easy to explode, and particularly, the nitrogen preparation equipment has a large safety risk for flammable and explosive substances such as oil gas and the like; if the purity of the nitrogen is too high, the production cost is too high, and the benefit is not great;
the content of the steam in the high-temperature nitrogen and steam mixed gas is 4-10%, if the content of the steam is too low, the flushing capability is poor, and the oil dirt cannot be flushed away, and if the content of the steam is too high, the temperature of the mixed gas is reduced, the heat conductivity is poor, the heat efficiency is reduced, and the oil dirt cannot be well melted.
The mixed gas of the high-temperature nitrogen and the water vapor is pressurized to 2-7 MPa, and high pressure is adopted for thickened oil or oil wax and the like, but the pressure cannot be too high, so that damage and influence on underground sealing mechanisms such as rubber and other material mechanisms are avoided.
The clearance between the oil pipe inner wall cleaning device 24, the sucker rod closed cleaning device 33 and the oil pipe outer wall cleaning device 39 and the oil pipe inner wall, the clearance between the sucker rods and the oil pipe outer wall are 2.5-3.5mm, the optimal clearance is 3mm, the jet force is optimal at the moment, the washing effect is optimal, and if the clearance is too large, the cleaning jet force is insufficient, and the cleaning effect is poor; if the clearance is too small, the pressure is suppressed, and potential safety hazards exist.
In light of the foregoing description of the preferred embodiments of the present invention, those skilled in the art can now make various alterations and modifications without departing from the scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A pollution-free high-temperature nitrogen cleaning operation method for an oil pumping well is characterized by comprising the following steps: high-temperature nitrogen generated by a nitrogen making machine and steam made by a high-pressure jet water or a steam machine are mixed in proportion to form high-temperature nitrogen and steam mixed gas, the high-temperature nitrogen and steam mixed gas is pressurized, pollution-free and closed continuous cleaning operation is respectively carried out on a sucker rod, the inner wall of an oil pipe and the outer wall of the oil pipe by a box body integrated type pumping well pollution-free high-temperature nitrogen cleaning device integrating a sucker rod closed cleaning device (33), an oil pipe inner wall cleaning device (24), an oil pipe outer wall cleaning device (39), a nitrogen making room, an operation room and a generator set, waste gas and liquid after cleaning, namely oil-water mixture passes through a liquid-gas separator, the waste water flows into a positive-negative pressure recovery tank for collection, the oil flows into a large four-way of a well head to be converged with a crude oil output pipeline, and the complete recovery of cleaning liquid and zero waste of crude oil are obtained; the pollution-free high-temperature nitrogen cleaning device for the pumping well comprises a box body (3), the interior of the box body (3) is divided into a nitrogen making room, an operation room and a power generation unit, nitrogen making equipment is arranged in the nitrogen making room, a steam engine, an air compressor, a power generator, a water tank and a water pump are respectively arranged in the power generation unit, the power generator provides electric power support for the nitrogen making equipment, the steam engine, the air compressor and the water pump, the nitrogen making equipment and the steam engine are respectively connected with a pipeline, are connected and converged through a three-way valve and then are discharged through an external pipeline, and a general control operation table for controlling the operation of the nitrogen making equipment, the steam engine, the air compressor, the power generator and the water pump is arranged in the operation room; the oil pipe inner wall cleaning device (24) comprises a pipe body (28), a movable sealing valve (27), a central pipe (31), an access port (25) and a discharge port (29), wherein the access port (25) is arranged on one side of the upper part of the pipe body (28), the discharge port (29) is arranged on one side of the lower part of the pipe body (28), valves (26) are arranged on the access port (25) and the discharge port (29) on the pipe body (28), the movable sealing valve (27) is arranged on the upper part of the pipe body (28), a connecting external thread (30) is arranged on the outer wall of the lower end of the pipe body (28), the central pipe (31) extending downwards is arranged in the pipe body (28), a plurality of injection holes (35) are orderly arranged on the outer wall of the central pipe (31) at intervals, and the central pipe (31) can be continuously spliced and extended to meet the requirement of the underground depth; the sucker rod closed cleaning device (33) consists of a small cylinder (34), a jet hole (35) and an air pipe connector (36), wherein the upper end of the small cylinder (34) is provided with a through connector (32), the outer side wall of the small cylinder (34) is provided with the air pipe connector (36), and the inner wall of the small cylinder (34) is orderly provided with a plurality of jet holes (35) at intervals; the oil pipe outer wall cleaning device (39) is composed of a large cylinder (40), jet holes (35) and an air pipe connector (36), connecting flanges (37) are respectively arranged at the upper end and the lower end of the large cylinder (40), a through hole (38) is formed in the upper end surface of the large cylinder (40), the air pipe connector (36) is arranged on the outer side wall of the large cylinder (40), and the jet holes (35) are sequentially arranged on the inner wall of the large cylinder (40) at intervals; a plurality of pipeline clamping grooves (1) are formed in the upper part of the box body (3), and a clamping bottom plate (5) is arranged at the lower part of the box body (3); a placing groove (7) is arranged on the upper portion of the box body (3), a plurality of pipeline clamping grooves (1) are arranged in the placing groove (7) at intervals in order, both ends of each pipeline clamping groove (1) are of a sealed structure, a plurality of corresponding threaded holes (13) are arranged on both sides of the outer side wall of the placing groove (7) at intervals in order, a limiting pressing plate (8) matched with the width of the placing groove (7) is arranged on the upper portion of the placing groove (7), both sides of the limiting pressing plate (8) are respectively positioned outside the outer side wall of the placing groove (7), adjusting screw rods (14) matched with the threaded holes (13) on the outer side wall of the placing groove (7) are respectively arranged on the outer sides of both side walls of the limiting pressing plate (8), grooves (9) corresponding to the plurality of pipeline clamping grooves (1) on the placing groove (7) are arranged on the lower surface of the limiting pressing plate (8) at intervals in order, the two sides of the tail of the upper surface of the box body (3) are respectively provided with a vertical rod (41), the two sides of the upper surface of the clamping bottom plate (5) are respectively provided with a semi-annular groove (44), a semi-annular plate (43) is arranged in the semi-annular groove (44), and the front end of the semi-annular plate (43) is provided with a through hole (42) matched with the vertical rods (41) on the two sides of the tail of the upper surface of the box body (3).
2. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 1, which is characterized in that: the addition amount of the high-pressure spraying water or the water vapor is 4 to 10 percent.
3. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 2, which is characterized in that: the addition amount of the high-pressure injection water or water vapor was 5%.
4. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 1, which is characterized in that: the mixed gas of the high-temperature nitrogen and the water vapor is pressurized to 2MPa to 7 MPa.
5. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 1, which is characterized in that: the high-temperature nitrogen temperature is 140-160 ℃.
6. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 1, which is characterized in that: the purity of the nitrogen is 95-98%.
7. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 1, which is characterized in that: the nitrogen purity was 97%.
8. The method for clean-up operation of non-polluting high temperature nitrogen for pumping wells according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
s1: placing the container of the pollution-free high-temperature nitrogen cleaning device of the pumping well on transportation equipment and hauling the container to a well site of the pumping well;
s2: starting a nitrogen making unit in a pollution-free high-temperature nitrogen cleaning device of the pumping well to prepare high-temperature nitrogen with the temperature of 140-160 ℃, wherein the purity of the nitrogen is 95-98%;
s3: injecting high-pressure water into the high-temperature nitrogen pipeline to instantaneously vaporize water to form a high-temperature nitrogen and steam mixed gas or directly converging water vapor prepared by a steam engine and the high-temperature nitrogen, pressurizing the mixed gas to 2-7 MPa, acquiring convergence and output of the high-temperature nitrogen and the water vapor through a three-way valve, and finally forming the high-temperature nitrogen and steam mixed gas, wherein the water vapor content is 4-10%;
s4: cleaning operation:
cleaning a sucker rod, namely installing a sucker rod closed cleaning device (33) at a wellhead, and spraying mixed gas of high-temperature nitrogen and water vapor out of a spray hole (35) in the sucker rod closed cleaning device (33) to perform closed cleaning operation on the sucker rod;
b, cleaning the outer wall of the oil pipe, namely installing an oil pipe outer wall cleaning device (39) on a wellhead blowout preventer, and ejecting mixed gas of high-temperature nitrogen and water vapor through an ejection hole (35) in the oil pipe outer wall cleaning device (39) to perform closed cleaning operation on the outer wall of the oil pipe;
c, cleaning the inner wall of the oil pipe: the oil pipe inner wall cleaning device (24) is connected with a wellhead paraffin removal valve or a production valve, and the mixed gas of high-temperature nitrogen and water vapor is sprayed out through a spraying hole (35) in the oil pipe inner wall cleaning device (24) to carry out closed cleaning operation on the oil pipe inner wall.
9. The non-pollution high-temperature nitrogen cleaning operation method for the pumping well as claimed in claim 8, wherein the nitrogen cleaning operation method comprises the following steps: the upper surface of the clamping bottom plate (5) is provided with clamping grooves (22) matched with the box body (3), two sides of the lower surface of the box body (3) are orderly provided with a plurality of corresponding inserted rods (20) at intervals, the inserted rods (20) are provided with jacks (19), two sides of the inner bottom surface of the clamping grooves (22) on the clamping bottom plate (5) are respectively provided with slots (21) corresponding to the inserted rods (20) on the two sides of the lower surface of the box body (3), the box body (3) is clamped into the clamping grooves (22) on the clamping bottom plate (5) and is inserted into the slots (21) on the clamping grooves (22) through the inserted rods (20) at the lower part of the box body (3), the jacks (19) on the corresponding inserted rods (20) at the two sides of the lower surface of the box body (3) are internally provided with fixing rods (10), and one end of each fixing rod (10) is provided with an expanding chuck (12), the other end of the fixed rod (10) is provided with an expanding nut (11) in threaded connection with the fixed rod (10);
the outer side wall of the box body (3) is provided with a concave storage cavity (16) corresponding to the operation room, the concave storage cavity (16) forms an operation table in the operation room, the storage cavity (16) is divided into a plurality of storage tanks by a plurality of partition plates (18), oil pipe inner wall cleaning devices (24), sucker rod closed cleaning devices (33) and oil pipe outer wall cleaning devices (39) are respectively stored in the plurality of storage tanks, and the storage cavity (16) is provided with a storage cavity door (17);
in order to further facilitate the clamping and taking of pipelines, an escalator is arranged on one side of the box body (3), a warning lamp is arranged on one side of the upper portion of the box body (3) for warning and reminding, and the warning lamp supplies power through a generator inside the box body (3);
the lower part of the clamping and placing bottom plate (5) is provided with wheels (4), the front end of the clamping and placing bottom plate (5) is provided with a traction connector (6), a plurality of support rods (23) are arranged on two sides of the lower surface of the clamping and placing bottom plate (5) at intervals in order, and the support rods (23) are of detachable structures.
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| CN109882142A (en) * | 2019-04-12 | 2019-06-14 | 李柏峰 | A kind of thermal well flushing plugging releasing oil displacement method and device thereof |
| CN111744896B (en) * | 2020-07-01 | 2021-08-10 | 北华大学 | Double-circulation heating type oil pumping pipe cleaning device based on energy recovery and control method |
| CN114000851B (en) * | 2021-12-30 | 2022-04-08 | 山东泉益环保科技有限公司 | Pollution-free high-temperature nitrogen cleaning operation device for pumping well |
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| RU2049227C1 (en) * | 1992-05-05 | 1995-11-27 | Акционерное общество "Российская торговая компания" | Method for well treatment |
| US7051818B2 (en) * | 2002-04-22 | 2006-05-30 | P.E.T. International, Inc. | Three in one combined power unit for nitrogen system, fluid system, and coiled tubing system |
| CN201090172Y (en) * | 2007-06-21 | 2008-07-23 | 李柏坤 | Well head connecting type sucker rod, oil tube environmental protection cleaner |
| CN102140899A (en) * | 2011-03-28 | 2011-08-03 | 通化石油化工机械制造有限责任公司 | Workover fluid recycling vehicle |
| CN202125280U (en) * | 2011-07-04 | 2012-01-25 | 吉林省国泰石油开发有限公司 | Pull-type electric heating energy-saving environment-friendly paraffin removing vehicle |
| CN105114035B (en) * | 2015-09-06 | 2017-07-14 | 张格玮 | A kind of workover treatment oil pipe, sucker rod on-line cleaning technique |
| CN105201456B (en) * | 2015-09-14 | 2018-05-25 | 吉林省国泰石油开发有限公司 | A kind of Dlagnosis of Sucker Rod Pumping Well light maintenance environmental protection operation technique |
| CN206071538U (en) * | 2016-05-12 | 2017-04-05 | 山东科瑞石油工程技术研究院 | A kind of wax card well nitrogen speed hot fluid is excused from a college course well unfreezing system |
| CN206928937U (en) * | 2017-04-21 | 2018-01-26 | 玉人超导石油设备有限公司 | Oil well operation Environment protection cleaning car |
| CN108620377B (en) * | 2018-04-27 | 2024-03-08 | 河北麟润石油钻采技术有限公司 | Online airtight belt cleaning device of oil well operation |
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