CN110763050B - Cooling medium and cooling device for ground cooling treatment of oil-based drilling fluid - Google Patents
Cooling medium and cooling device for ground cooling treatment of oil-based drilling fluid Download PDFInfo
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- CN110763050B CN110763050B CN201910985711.1A CN201910985711A CN110763050B CN 110763050 B CN110763050 B CN 110763050B CN 201910985711 A CN201910985711 A CN 201910985711A CN 110763050 B CN110763050 B CN 110763050B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/20—Antifreeze additives therefor, e.g. for radiator liquids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
- F25B1/047—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type of screw type
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Abstract
The invention discloses a cooling medium for ground cooling treatment of oil-based drilling fluid, which comprises the following components in parts by weight: 100 parts of ethylene glycol, 0.5-0.7 part of triethylene glycol bridged cyclodextrin, 0.8-1.0 part of copper nanoparticles, 0.25-1.0 part of sodium dodecyl benzene sulfonate and 40-45 parts of water. Adopt this cooling medium to carry out cooling device of oil-based drilling fluid ground cooling processing, include: the system comprises a drilling fluid storage tank, a primary plate cooler, a secondary plate cooler, an ultrasonic radiation tank and a water chiller; the plate bundles of the two plate coolers are vertically arranged; the water chiller is used for cooling the cooling medium, the water chiller is connected with the ultrasonic radiation tank and used for conducting ultrasonic dispersion on the cooling medium, and a liquid outlet of the ultrasonic radiation tank is respectively connected with cooling medium inlets of the two plate coolers. The cooling medium is matched with the cooling device for use, and has the characteristics of high heat conductivity coefficient of the used medium, small occupied space and the like, so that the signal abnormality of the guide tool can be effectively prevented, and the service life of the guide tool is prolonged.
Description
Technical Field
The invention relates to the technical field of high-temperature well drilling fluid cooling treatment, in particular to a cooling medium and a cooling device for ground cooling treatment of high-temperature well oil-based drilling fluid.
Background
Because the shale gas has the characteristics of deep burial and dispersion, the exploitation effect of the horizontal well is obviously better than that of a vertical well. Oil-based drilling fluid is generally adopted for drilling of a horizontal well, but due to the fact that the formation temperature is high, a conventional steering tool system cannot adapt, tool signal transmission is abnormal during drilling, even no signal of a steering tool occurs, and drilling operation cannot be conducted. At present, no effective solution is found in the aspect of the material of the guiding tool, so that an efficient ground cooling treatment method is urgently needed for the high-temperature well oil-based drilling fluid in order to prevent the signal abnormality of the guiding tool and prolong the service life of the guiding tool.
Disclosure of Invention
The invention aims to provide a high-efficiency cooling medium for ground temperature reduction treatment of a high-temperature well oil-based drilling fluid and a cooling device matched with the same.
The invention provides a compound cooling medium for ground cooling treatment of oil-based drilling fluid, which comprises the following components in parts by weight: 100 parts of ethylene glycol, 0.5-0.7 part of triethylene glycol bridged cyclodextrin, 0.8-1.0 part of copper nanoparticles, 0.25-1.0 part of sodium dodecyl benzene sulfonate and 40-45 parts of water. Wherein the particle size of the copper nanoparticles is 20nm-40 nm. The mass percentage concentration of the ethylene glycol is 98%.
The preparation method of the cooling medium comprises the following steps: firstly, adding ethylene glycol into a stirring kettle, adding triethylene glycol bridged cyclodextrin and metal copper nanoparticles under the stirring of 60rpm, continuously stirring for 15min, adding sodium dodecyl benzene sulfonate and water, and increasing the rotating speed to 2000rpm to obtain the compound cooling medium.
The metal copper not only has rich resources and low price, but also has stronger local surface plasmon resonance, and presents good electrochemical performance, heat-conducting performance and the like. However, the copper nanoparticles have poor size uniformity, are easy to agglomerate, are not suitable for long-term storage and are easy to oxidize. Aiming at the problem, the invention adopts triethylene glycol bridged cyclodextrin as a dispersing agent, and utilizes the hydrogen bond action between hydroxyl on the surface of oxidized copper and triethylene glycol of the bridged cyclodextrin to form a supermolecule micelle structure, thereby not only avoiding the agglomeration problem of nano copper particles, but also leading the cyclodextrin to be easier to disperse in glycol solution due to the hydrophilicity of the outer wall of the cyclodextrin, and leading the formed cooling medium system to be more uniform and stable. The molecular structure of the supermolecule micelle is as follows:
the cooling device used in cooperation with the cooling medium provided by the invention structurally comprises: the drilling fluid storage tank, one-level plate cooler, second grade plate cooler, ultrasonic wave radiation groove, cold water machine.
The plate bundles of the primary plate cooler and the secondary plate cooler are vertically arranged. The plate material is SS30408 stainless steel, and the drilling fluid is on the wide channel side, and the channel spacing is 12 mm. The cooling medium is on the narrow channel side, and the channel spacing is 8 mm. And the top of the drilling fluid storage tank is provided with a drilling fluid inlet and a nitrogen injection hole. And the space above the liquid level in the drilling fluid storage tank is filled with nitrogen to protect the drilling fluid and prevent the drilling fluid from contacting with air. A liquid outlet at the lower part of the drilling fluid storage tank is connected with a liquid inlet at the bottom of the primary plate cooler through a drilling fluid pump. The liquid outlet at the top of the first-stage plate cooler is connected with the liquid inlet at the top of the second-stage plate cooler. And a cooled low-temperature drilling fluid outlet is formed in the bottom of the secondary plate cooler, and the low-temperature drilling fluid returns to a drilling system.
The cooling medium storage tank is filled with the composite cooling medium. A liquid inlet of the water cooler is connected with a cooling medium storage tank, the water cooler is used for cooling the cooling medium, and the chemical explosion-proof skid-mounted air-cooled screw type water cooler is selected. The liquid outlet of the water chiller is connected with the ultrasonic radiation tank and used for carrying out ultrasonic dispersion on the cooling medium subjected to cooling treatment, so that metal copper particles in the cooling medium are further prevented from settling, and the metal copper particles are uniformly dispersed in the cooling medium. The liquid outlet of the ultrasonic radiation groove is respectively connected with the cooling medium inlet at the bottom of the first-stage plate cooler and the second-stage plate cooler through a three-way valve, the cooling medium outlets at the top of the first-stage plate cooler and the top of the second-stage plate cooler are connected to the liquid inlet of a water cooler through pipelines, the high-temperature cooling medium discharged after heat exchange is cooled through the water cooler, and then the cooling medium is recycled.
The plate is made of SS30408 stainless steel, so that the corrosion problem is effectively solved. The drilling fluid is arranged on the wide channel side, the channel spacing is 12mm, the flow rate is 0.6-1.6m/s, the cooling medium is arranged on the narrow channel side, the channel spacing is 8mm, and the flow rate is 1.8-2.6 m/s. It is further preferred that the drilling fluid is at a flow rate of 1.2m/s on the wide channel side and the temperature reducing medium is at a flow rate of 2.1m/s on the narrow channel side.
The cooling device comprises the following technical processes:
high-temperature drilling fluid to be cooled is filled into a drilling fluid storage tank with nitrogen protection by a slurry pump, the drilling fluid in the storage tank is sent into a primary plate heat exchanger by a drilling fluid pump, then enters a secondary plate heat exchanger, and the obtained low-temperature drilling fluid returns to a drilling system after being cooled twice; on the other hand, the composite cooling medium is cooled by a water cooler and dispersed by an ultrasonic radiation tank and then respectively enters the primary plate heat exchanger and the secondary plate heat exchanger to exchange heat with the drilling fluid. The cooling medium of the first-stage plate cooler and the drilling fluid exchange heat in a parallel flow mode, and the cooling medium of the second-stage plate cooler and the drilling fluid exchange heat in a countercurrent mode. The plate heat exchangers are operated in two stages in series for the drilling fluid and in parallel for the cooling medium.
Compared with the prior art, the invention has the advantages that:
(1) the composite cooling medium obviously improves the heat conductivity coefficient of the heat transfer medium due to the addition of the copper nanoparticles; the sodium dodecyl benzene sulfonate is a surface active substance, and the stability of the copper nanoparticles in the ethylene glycol aqueous solution can be obviously improved through the amphiphilic effect of the sodium dodecyl benzene sulfonate; the invention adopts the cyclodextrin additive, and the triethylene glycol bridged cyclodextrin has a hydrophobic cavity and good water solubility, so the assembly effect of the triethylene glycol bridged cyclodextrin can promote the dispersion of copper nanoparticles, and metal nanoparticles are not easy to aggregate, thereby the defect of easy precipitation is overcome, and the bubbling of a cooling medium system can be prevented and controlled.
(2) The plate heat exchanger has the characteristics of small occupied area and high efficiency, so that the drilling fluid cooling device can be applied to a narrow drilling operation platform; the plate heat exchanger is completely externally arranged, so that the plate heat exchanger has the characteristic of convenient maintenance; the plate bundle is vertical, so that scabbing of slurry is effectively inhibited;
(3) the drilling fluid is arranged on the side of the wide channel, and the high flow speed of the drilling fluid drives the slurry containing solid particles to flow on the surface of the plate, so that material accumulation or blockage is avoided;
(4) the water cooler is adopted to cool the high-temperature cooling medium discharged by the first-stage plate heat exchanger and the second-stage plate heat exchanger, so that the cooling medium is recycled, and the problem that a drilling operation platform does not have a water source or is difficult to supply with the water source is solved.
(5) The method for cooling the drilling fluid has the characteristics of high heat conductivity coefficient of the used medium, small occupied space and the like, so that the signal abnormality of the guide tool can be effectively prevented, and the service life of the guide tool is prolonged.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic structural diagram of a cooling device for a high-temperature oil-based drilling fluid.
Reference numbers in the figures:
the device comprises a drilling fluid inlet 1, a drilling fluid storage tank 2, a drilling fluid pump 3, a primary plate cooler 4, a secondary plate cooler 5, a low-temperature drilling fluid outlet 6, an ultrasonic radiation groove 7, a water chiller 8, a cooling medium liquid inlet 9, a nitrogen injection hole 10, a cooling medium storage tank 11 and a valve 12.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
Example 1
A cooling medium for ground cooling treatment of high-temperature well oil-based drilling fluid is prepared by the following steps: adding 100kg of glycol with the mass fraction of 98% into an enamel stirring kettle of 2.0 cubic meter, adding 0.5kg of triethylene glycol bridging cyclodextrin and 0.8kg of metal copper nanoparticles with the particle size of 20nm-40nm under the stirring of 60rpm, continuously stirring for 15min, adding 0.25kg of sodium dodecyl benzene sulfonate and 40kg of water, increasing the rotating speed to 2000rpm, and stirring for 15min to obtain the compound cooling medium.
Example 2
As shown in fig. 1, the cooling device used with a cooling medium according to the present invention includes: the drilling fluid storage tank 2, the first-level plate cooler 4, the second-level plate cooler 5, the ultrasonic radiation tank 7 and the water chiller 8.
The plate bundles of the primary plate cooler and the secondary plate cooler are vertically arranged. The plate material is SS30408 stainless steel, and the drilling fluid is on the wide channel side, and the channel spacing is 12 mm. The cooling medium is on the narrow channel side, and the channel spacing is 8 mm. And the top of the drilling fluid storage tank is provided with a drilling fluid inlet 1 and a nitrogen injection hole 10. And the space above the liquid level in the drilling fluid storage tank is filled with nitrogen to protect the drilling fluid and prevent the drilling fluid from contacting with air. A liquid outlet at the lower part of the drilling fluid storage tank is connected with a liquid inlet at the bottom of the primary plate cooler through a drilling fluid pump 3. The liquid outlet at the top of the first-stage plate cooler is connected with the liquid inlet at the top of the second-stage plate cooler. And a cooled low-temperature drilling fluid outlet 6 is arranged at the bottom of the secondary plate cooler, and the low-temperature drilling fluid returns to a drilling system.
The cooling medium storage tank 11 is filled with the composite cooling medium. The cooling medium storage tank is connected with a liquid inlet of the water cooler, and a valve 12 is arranged on the connecting pipeline. The water chiller 8 is used for cooling a cooling medium, and a chemical explosion-proof skid-mounted air-cooled screw type water chiller is selected. The liquid outlet of the water chiller is connected with the ultrasonic radiation tank 7 and used for performing ultrasonic dispersion on the cooling medium subjected to cooling treatment to prevent the metal copper particles in the cooling medium from settling, so that the metal copper particles are uniformly dispersed in the cooling medium. The liquid outlet of ultrasonic wave radiation groove passes through the three-way valve (not shown) and is connected with the coolant inlet of one-level plate cooler, second grade plate cooler bottom respectively, and the coolant outlet at one-level plate cooler and second grade plate cooler top all is connected to the coolant inlet 9 of cold water machine through the pipeline, cools down the processing through cold water machine to the coolant of high temperature, then recycles coolant.
Adding oil-based drilling fluid to be cooled at 70 ℃ into a drilling fluid storage tank 2 with nitrogen protection by using a mud pump, and when the drilling fluid occupies more than 1/2 in the storage tank, uniformly sending the oil-based drilling fluid into a primary plate heat exchanger 4 and then into a secondary plate heat exchanger 5 by a drilling fluid pump 3 at a discharge capacity of 30L/s under the circulation state of the composite cooling medium prepared in the embodiment 1, and measuring that the temperature of low-temperature drilling fluid discharged by the secondary plate heat exchanger 5 is 37.2 ℃.
Example 3
The triethylene glycol bridged cyclodextrin in example 1 was changed to 0.7kg, the metallic copper nanoparticles were changed to 1.0kg, and the amounts of the other components were unchanged to obtain a composite cooling medium.
The cooling medium was used in combination with the cooling device of example 2. After the oil-based drilling fluid at 70 ℃ is cooled, the temperature of the low-temperature drilling fluid discharged by the secondary plate heat exchanger 5 is measured to be 28.6 ℃.
Example 4
The specific preparation method of the cooling medium for ground temperature reduction treatment of the high-temperature well oil-based drilling fluid is the same as that in example 1, except that the addition amount of the sodium dodecyl benzene sulfonate is 1.0kg, and the addition amount of the water is 45 kg.
The cooling medium was used in combination with the cooling device of example 2. After the oil-based drilling fluid at 70 ℃ is cooled, the temperature of the low-temperature drilling fluid discharged by the secondary plate heat exchanger 5 is measured to be 35.6 ℃.
In conclusion, the invention provides a composite cooling medium consisting of ethylene glycol, triethylene glycol bridged cyclodextrin, copper nanoparticles, sodium dodecyl benzene sulfonate and water, and the cooling medium is utilized to invent a drilling fluid cooling device matched with the cooling medium. The device is mainly characterized in that a flow of serially connecting a double-plate heat exchanger with a cooling drilling fluid and a cooling medium in parallel is adopted, and an ultrasonic radiation groove is adopted at the outlet of a water cooler to strengthen the process flow of dispersing the nano particles. Compared with the prior drilling fluid cooling technical method, the method has the characteristics of high heat conductivity coefficient of the used medium, small occupied space and the like, thereby effectively preventing the signal abnormality of the guiding tool and prolonging the service life of the guiding tool.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (5)
1. The utility model provides a cooling device of oil base drilling fluid ground cooling processing which characterized in that includes: the system comprises a drilling fluid storage tank, a primary plate cooler, a secondary plate cooler, an ultrasonic radiation tank, a water cooler and a cooling medium storage tank;
the plate bundles of the primary plate cooler and the secondary plate cooler are vertically arranged, nitrogen is filled in the space above the liquid level in the drilling fluid storage tank, a liquid outlet at the lower part of the drilling fluid storage tank is connected with a liquid inlet at the bottom of the primary plate cooler through a drilling fluid pump, a liquid outlet at the top of the primary plate cooler is connected with a liquid inlet at the top of the secondary plate cooler, and a drilling fluid outlet is arranged at the bottom of the secondary plate cooler;
a liquid inlet of the water cooler is connected with a cooling medium storage tank and used for cooling the cooling medium, a liquid outlet of the water cooler is connected with an ultrasonic radiation groove and used for performing ultrasonic dispersion on the cooling medium subjected to cooling treatment, a liquid outlet of the ultrasonic radiation groove is respectively connected with cooling medium inlets at the bottoms of the primary plate cooler and the secondary plate cooler through a three-way valve, and cooling medium outlets at the tops of the primary plate cooler and the secondary plate cooler are connected to a liquid inlet of the water cooler through pipelines;
the cooling medium in the cooling medium storage tank comprises the following components in parts by weight: 100 parts of ethylene glycol, 0.5-0.7 part of triethylene glycol bridged cyclodextrin, 0.8-1.0 part of copper nanoparticles with the particle size of 20-40nm, 0.25-1.0 part of sodium dodecyl benzene sulfonate and 40-45 parts of water; the mass percentage concentration of the ethylene glycol is 98%; the cooling medium is prepared by the following method: firstly, adding ethylene glycol into a stirring kettle, adding triethylene glycol bridged cyclodextrin and metal copper nanoparticles under the stirring of 60rpm, continuously stirring for 15min, adding sodium dodecyl benzene sulfonate and water, and increasing the rotating speed to 2000rpm to obtain the compound cooling medium.
2. The cooling device for ground temperature reduction of oil-based drilling fluid according to claim 1, wherein the plate bundles of the primary plate cooler and the secondary plate cooler are vertical, the plate material is SS30408 stainless steel, the drilling fluid is on the wide channel side, the channel spacing is 12mm, the flow rate is 0.6-1.6m/s, the cooling medium is on the narrow channel side, the channel spacing is 8mm, and the flow rate is 1.8-2.6 m/s.
3. The cooling apparatus for surface cooling of oil-based drilling fluid according to claim 2, wherein the drilling fluid has a flow rate of 1.2m/s on the wide passage side and the cooling medium has a flow rate of 2.1m/s on the narrow passage side.
4. The cooling apparatus for ground temperature reduction of oil-based drilling fluid according to claim 1, wherein a drilling fluid inlet and a nitrogen gas injection hole are provided at the top of the drilling fluid storage tank.
5. The cooling device for ground temperature reduction treatment of oil-based drilling fluid according to claim 1, wherein the water chiller is a chemical explosion-proof skid-mounted air-cooled screw water chiller.
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| CN201910985711.1A CN110763050B (en) | 2019-10-17 | 2019-10-17 | Cooling medium and cooling device for ground cooling treatment of oil-based drilling fluid |
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| CN201910985711.1A CN110763050B (en) | 2019-10-17 | 2019-10-17 | Cooling medium and cooling device for ground cooling treatment of oil-based drilling fluid |
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| CN110763050B true CN110763050B (en) | 2021-04-16 |
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| CN101735775A (en) * | 2010-01-26 | 2010-06-16 | 上海第二工业大学 | Method for preparing nano fluid for heat transfer medium of solar heat exchange system |
| PL2758037T3 (en) * | 2011-09-23 | 2018-10-31 | Emerald Hilton Davis, Llc | Self-assembled nano-structure particle and method for preparing |
| CN104263326A (en) * | 2014-09-04 | 2015-01-07 | 陈德全 | Nano long-acting liquid coolant |
| CN104861086B (en) * | 2015-05-07 | 2018-07-17 | 吉林化工学院 | A kind of preparation method of nano-fluid stabilizer |
| CN105400212B (en) * | 2015-11-09 | 2018-10-16 | 复旦大学 | A method of in nanoparticle surface modified functional molecular |
| CN107652451B (en) * | 2017-09-19 | 2020-05-19 | 天津大学 | Silver nanoparticle hybrid supramolecular hydrogel based on cyclodextrin/PEG grafted polyacrylic acid, and preparation and application thereof |
| CN108457609A (en) * | 2018-03-23 | 2018-08-28 | 吉林大学 | A kind of temperature difference power generation type high temperature mud cooling recirculation system |
| CN110284845A (en) * | 2019-07-29 | 2019-09-27 | 中国地质科学院勘探技术研究所 | A kind of drilling fluid forced cooling device and low-temperature circulating boring method |
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