CN109469469A - A kind of targeting low temperature fracturing device and method - Google Patents
A kind of targeting low temperature fracturing device and method Download PDFInfo
- Publication number
- CN109469469A CN109469469A CN201811431500.5A CN201811431500A CN109469469A CN 109469469 A CN109469469 A CN 109469469A CN 201811431500 A CN201811431500 A CN 201811431500A CN 109469469 A CN109469469 A CN 109469469A
- Authority
- CN
- China
- Prior art keywords
- pipe
- low temperature
- feed pipe
- cryogen
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000008685 targeting Effects 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 16
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims abstract description 44
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims abstract description 37
- RQPZNWPYLFFXCP-UHFFFAOYSA-L barium dihydroxide Chemical compound [OH-].[OH-].[Ba+2] RQPZNWPYLFFXCP-UHFFFAOYSA-L 0.000 claims abstract description 23
- 229910001863 barium hydroxide Inorganic materials 0.000 claims abstract description 23
- 235000019270 ammonium chloride Nutrition 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 239000000243 solution Substances 0.000 claims description 24
- 238000007789 sealing Methods 0.000 claims description 22
- 235000019441 ethanol Nutrition 0.000 claims description 21
- 230000006872 improvement Effects 0.000 claims description 13
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 210000004534 cecum Anatomy 0.000 claims description 4
- 239000011259 mixed solution Substances 0.000 claims description 4
- 150000003863 ammonium salts Chemical class 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 2
- 238000005119 centrifugation Methods 0.000 claims description 2
- 239000002826 coolant Substances 0.000 claims description 2
- 238000004090 dissolution Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 claims description 2
- 208000035541 Device inversion Diseases 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 230000032696 parturition Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 abstract description 17
- 230000000694 effects Effects 0.000 abstract description 7
- 230000009189 diving Effects 0.000 abstract description 3
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 16
- 239000007788 liquid Substances 0.000 description 11
- 206010017076 Fracture Diseases 0.000 description 8
- 229910052757 nitrogen Inorganic materials 0.000 description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 8
- 230000035882 stress Effects 0.000 description 6
- 206010010149 Complicated fracture Diseases 0.000 description 5
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 230000009466 transformation Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 3
- 230000008014 freezing Effects 0.000 description 3
- 239000003208 petroleum Substances 0.000 description 3
- 241000521257 Hydrops Species 0.000 description 2
- 206010030113 Oedema Diseases 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 229910052788 barium Inorganic materials 0.000 description 2
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 229930006000 Sucrose Natural products 0.000 description 1
- CZMRCDWAGMRECN-UGDNZRGBSA-N Sucrose Chemical compound O[C@H]1[C@H](O)[C@@H](CO)O[C@@]1(CO)O[C@@H]1[C@H](O)[C@@H](O)[C@H](O)[C@@H](CO)O1 CZMRCDWAGMRECN-UGDNZRGBSA-N 0.000 description 1
- 206010053615 Thermal burn Diseases 0.000 description 1
- 150000004703 alkoxides Chemical class 0.000 description 1
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 1
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 1
- 235000011130 ammonium sulphate Nutrition 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 150000004679 hydroxides Chemical class 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 230000014075 nitrogen utilization Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000005720 sucrose Substances 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention provides a kind of targeting low temperature fracturing device and method, wherein device includes storing pipe, immersible pump, feed pipe and discharge nozzle, the discharge nozzle is mounted on the outlet of immersible pump, discharge nozzle is equipped with control valve, discharge nozzle is equipped with discharge port, the storing pipe is connected with diving pump intake, cryogen is generated and/or temporarily stored for cryogen, the feed pipe is connected with storing pipe upper end, for the group of cryogen or generation cryogen to be distributed into storing pipe, while feed pipe also carries out the load connector of targeting pressure break as decentralization discharge port.The present invention uses ammonium chloride and barium hydroxide for reaction reagent, realizes the effect in different layers position broken rock by the position of control immersible pump reaction with use ethanol as delivery vehicles, achievees the purpose that target low temperature broken rock.
Description
Technical field
The invention belongs to well fracturing technical field, it is related to a kind of oil/gas well low temperature fracturing technique, more particularly to a kind of
Target low temperature fracturing device and method.
Background technique
The mode of extension in traditional hydraulic fracturing technology crack is obviously with directional, i.e., crustal stress can constrain hydraulic fracture
Deflect direction.Theoretical according to classical hydraulic fracturing, the extension in crack will be towards biggest principal stress direction, this is unfavorable for optimizing
Reservoir volume transformation.
Main reasons is that:
1. being unfavorable for generating complicated fracture network, the low efficiency of reservoir volume transformation；
2. solution cavity is the main gathering area of petroleum resources for fracture hole type oil-gas reservoir, crack is the master of petroleum resources
Want transport channel, it is difficult to generate the fissure channel for linking up solution cavity and pit shaft.
Therefore, for this kind of geologic reservoir, main thinking of exploiting is by hydraulic fracturing technology by hydraulic fracture and solution cavity
The communication of fixed point, orientation, so that recovery ratio is improved, however due to the influence of crustal stress, hydraulic fracture and solution cavity communication are difficult big,
Effect is undesirable, this is also a big critical problem of fracture hole type oil-gas reservoir exploitation.
In recent years, scholar proposes to carry out pressure break using liquid nitrogen.The temperature of liquid nitrogen is -196 DEG C or so, when it connects with reservoir
When touching, the active force that thermal stress, frost-heave force etc. are not influenced by crustal stress can be generated, breaks through crustal stress to hydraulic fracture propagation direction
Constraint, to generate complicated fracture network.However, liquid nitrogen pressure break is seemed and had a bright future, target is being transported to by ground
Layer will lead to a large amount of " loss of refrigeration capacity " during position, and liquid nitrogen utilization efficiency is lower, and there are many technologies and operational
Problem.
Based on the above analysis, from the physical property of reservoir rock and the operability of actual production, consider to utilize
The method for targeting low temperature broken rock generates complicated Fracture Networks in specified oil-producing destination layer, optimizes the volume transformation of reservoir, together
When realized in fracture hole type oil-gas reservoir recovery process hydraulic fracture and solution cavity fixed point, orientation communication, improve petroleum resources
Recovery ratio.
Summary of the invention
It is an object of the invention to solve the problems of the above-mentioned prior art, a kind of efficient targeting low temperature pressure break is provided
Device and method, by the way that the liquid nitrogen of traditional broken rock is replaced with ammonium chloride and barium hydroxide, and to existing wellbore apparatus
It improves, realizes the purpose of targeting low temperature broken rock.
The present invention adopts the following technical scheme:
A kind of targeting low temperature fracturing device, it is characterised in that: described including storing pipe, centrifugal pump, feed pipe and discharge nozzle
Discharge nozzle is mounted on the outlet of centrifugal pump, and discharge nozzle is equipped with control valve, and discharge nozzle is equipped with discharge port, the storing pipe with from
Heart pump entrance is connected, and generates for cryogen and/or temporarily stores cryogen, and the feed pipe is connected with storing pipe upper end, and being used for will be cold
Agent or the group for generating cryogen are distributed into storing pipe, while the load that feed pipe also carries out targeting pressure break as decentralization discharge port connects
Fitting.
It is generated as an improvement, the cryogen is reacted by the component A and component B of normal-temperature, component A and component B pass through charging
Pipe is added in storing pipe and centrifugal pump.
As an improvement, the feed pipe has two, one of them is main feed pipe, as generate a kind of component of cryogen into
Material is also load connector simultaneously, and another is time feed pipe, and another component for generating cryogen is fed, main feed pipe with
The lower end of secondary feed pipe is respectively equipped with the material inlet valve of control charging, and the storing pipe, which is equipped with, prevents centrifugal pump inlet pressure mistake
Low air pressure balance mouth.
As an improvement, the centrifugal pump is inverted setting, the discharge nozzle is L shape pipe or spiral element, L shape pipe or spiral shape
Pipe the other end is cecum, and several apertures for discharging are provided on the horizontal segment of L shape pipe, and spiral element is in spiral section portion
Position is also equipped with several apertures for discharging.
As an improvement, the centrifugal pump be immersible pump, immersible pump include top cover, middle case, sealing ring one, stator, under
Bearing, cooling oil, sealing ring two, oil cylinder cover, sealing ring three, the pump housing, improve chassis, impeller, connecting key, mechanical seal, rotor,
Upper bearing (metal), bearing block；
Sealing ring one is installed, bearing block is mounted on top cover lower end, and upper bearing (metal) is mounted between top cover and middle case
In bearing block, rotor one end is mounted on upper bearing (metal), and the other end is mounted on lower bearing, and lower bearing is mounted under middle case
It holds, stator, the rotor peripheral hardware mechanical seal of lower bearing lower part is equipped in the middle case outside rotor, mechanical seal is outside cooling
Oil, the lower end of mechanical seal are equipped with oil cylinder cover, middle case and oil cylinder cover and seal equipped with sealing ring two, oil cylinder cover and the pump housing
It is sealed using sealing ring three, pumps intracorporal rotor tip and be equipped with the impeller positioned by connecting key, and pump housing side is equipped with diving
Pump discharge；
The improvement chassis is that sheet iron welding surrounds, and lower end opening, top is welded on the pump housing；
After immersible pump is inverted, the welding ring for improving chassis and storing tube end is welded to connect, discharge nozzle is mounted on latent
On exit of pump.
As an improvement, being equipped with the temperature sensor of measurement refrigerant temperature in the immersible pump or in storing pipe.
A kind of targeting low temperature fracturing process, which comprises the following steps:
Component A is sent into storing pipe and centrifugal pump by step 1 by feed pipe；
Component B is sent into storing pipe and centrifugal pump by step 2 by feed pipe；
Step 3, component A and component B react in storing pipe and centrifugal pump, generate the cryogen of low temperature, while starting centrifugation
Pump accelerates reaction to carry out；
Centrifugal pump is transferred to underground the position for needing low temperature pressure break by the feed pipe as load connector by step 4；
Control valve in step 5, opening discharge nozzle, cryogenic coolant spray from discharge port, target to subterranean strata low
Temperature and pressure are split.
As an improvement, the component A is ammonium salt, the component B is barium hydroxide.
As an improvement, the component A is ammonium chloride and alcohol mixed solution, the component B is barium hydroxide and second
Mixed alkoxide solution.
As an improvement, it is 63.4% or more that the concentration of alcohol, which is percent by volume, chloride leach is formed in ethanol
Uniform solution, barium hydroxide dissolution also form uniform solution in ethanol.
Beneficial effects of the present invention:
1. the present invention is by replacing with operational preferably ammonium chloride and eight water hydroxides for the traditional sucrose liquid nitrogen of broken rock
Barium overcomes since oil recovery destination layer is too long, the defect that liquid nitrogen absorbs heat during transportation, and avoids and be easy using liquid nitrogen
Low temperature is caused to scald；Liquid nitrogen is easy gasification to pit shaft and the demanding problem of equipment pressure resistance degree.
2. the present invention improves wellbore apparatus, device utilizes the installing submersible pump on conveying oil pipe, latent by adjusting
The oil reservoir broken rock in a certain position is realized in the position of water pump, the feature for having accuracy high, easy to operate.
3. the present invention is due to being solid using reagent ammonium chloride and barium hydroxide, admittedly it does not need to continue injection, by
In only just reaction cooling at the time of contact, in oil reservoir small space, effect is preferable, ammonium chloride and barium hydroxide reaction process
In can generate a large amount of ammonia, it will form the effect to build the pressure in reservoir narrow space, mention rock-breaking effect significantly
Height further results in the generation of complicated Fracture Networks, optimizes the transformation of reservoir volume.
4. the temperature of target reservoir is generally at 100 DEG C or so, and producing well inner product and due to the presence of geothermic gradient
Tired to have a large amount of hydrops, these hydrops are pushed into inside rock stratum under the action of ammonia, ammonium chloride and barium hydroxide reaction
Temperature is reduced to subzero 30 DEG C, can make free water freezing around, and the Free water in rock stratum is quickly cooled to solid, has reached fast
The effect of fast broken rock.
Detailed description of the invention
Fig. 1 is that the embodiment of the present invention 1 targets low temperature fracturing device structural schematic diagram；
Fig. 2 is that the embodiment of the present invention 2 targets low temperature fracturing device structural schematic diagram；
Fig. 3 is that the embodiment of the present invention 3 targets low temperature fracturing device structural schematic diagram；
Fig. 4 is submersible pump structure schematic diagram of the present invention.
Appended drawing reference: 1- top cover, 2- sealing ring one, 3- stator, 4- lower bearing, 5- cooling oil, 6- sealing ring two, 7- oil cylinder
It covers, 8- sealing ring three, the 9- pump housing, 10- improvement chassis, 11- impeller, 12- connecting key, 13- mechanical seal, 14- rotor, on 15-
Bearing, 16- bearing block, 17- middle case, 18- control valve, 19- feed pipe, 20- storing pipe, 21- main feed pipe, 22- times into
Expects pipe, 23- air pressure balance mouth, 24- immersible pump, 25- cryogen, 26- discharge nozzle, 27- material inlet valve.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, the technical solution in the present invention is carried out below
It clearly and completely describes, it is clear that described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
Embodiment 1
As shown in Figure 1 and Figure 4, a kind of efficient targeting low temperature fracturing device, including storing pipe 20, immersible pump 24, charging
Pipe 19 and discharge nozzle 26, the discharge nozzle 26 are mounted on the outlet of immersible pump 24, and discharge nozzle 26 is equipped with control valve 18, discharge nozzle
26 are equipped with discharge port, and the storing pipe 20 is connected with 24 entrance of immersible pump, and immersible pump 24 is installed on the lower end of storing pipe 20,
It is generated for cryogen 25 and/or interim storage cryogen 25, the feed pipe 19 is connected with 20 upper end of storing pipe, is used for cryogen 25
Or the group of generation cryogen 25 is distributed into storing pipe 20, while feed pipe 19 also carries out holding for targeting pressure break as decentralization discharge port
Power connector.
The immersible pump 24 is fixed on the end of storing pipe 20, by feed pipe 19 rise or fall realize diving
Pump the raising and lowering of 24 positions.
The immersible pump 24 is immersible pump used in everyday home pumped storage water.As shown in figure 4, it includes top cover 1, middle case
17, sealing ring 1, stator 3, lower bearing 4, cooling oil 5, sealing ring 26, oil cylinder cover 7, sealing ring 38, the pump housing 9, improvement chassis
10, impeller 11, connecting key 12, mechanical seal 13, rotor 14, upper bearing (metal) 15, bearing block 16；
Sealing ring 1 is installed, bearing block 16 is mounted on 1 lower end of top cover, upper bearing (metal) between top cover 1 and middle case 17
15 are mounted in bearing block 16, and 14 one end of rotor is mounted on upper bearing (metal) 15, and the other end is mounted on lower bearing 4, and lower bearing 4 is pacified
Stator 3, the 14 peripheral hardware machine of rotor of 4 lower part of lower bearing are equipped in middle case 17 outside 17 lower end of middle case, rotor 14
Tool sealing 13, mechanical seal 13 are cooling oil 5 outside, and the lower end of mechanical seal 13 is equipped with oil cylinder cover 7, middle case 17 and oil
Cylinder cap 7 is sealed equipped with sealing ring 26, and oil cylinder cover 7 and the pump housing 9 are sealed using sealing ring 38, and 14 end of rotor in the pump housing 9 is set
There is the impeller 11 positioned by connecting key 12, and 9 side of the pump housing is exported equipped with immersible pump 24；
The improvement chassis 10 is that sheet iron welding surrounds, and lower end opening, top is welded on the pump housing 9；
After immersible pump 24 is inverted, the welding ring for improving chassis 10 and 20 end of storing pipe is welded to connect, discharge nozzle 26
It is mounted in the outlet of immersible pump 24.
As shown in Figure 1, connecting the welding ring welding for improving chassis 10 and 20 end of storing pipe after immersible pump 24 is inverted
It connects, then will be weldingly connected at the top of feed pipe 19 and storing pipe 20, a small-sized control valve 18 is installed on the water outlet of immersible pump 24
(the western 220V electromagnetic water valve of moral power may be selected in control valve 18), concrete model is depending on outlet size, 18 other side of control valve
Nozzle connects a L shape pipe, and L shape tube end is cecum, and several apertures for discharging are provided on the horizontal segment of L shape pipe.
The further technical solution of the present invention is that the circuit line of immersible pump 24 and control valve 18 is drawn from well head, makes electricity
Route rests on outside well.
The further technical solution of the present invention be further include temperature sensor, be set on the pump housing 9 of immersible pump 24, temperature
Degree sensor generates the temperature value of cryogen 25 after being used to incude ammonium chloride and barium hydroxide reaction, and reaches in 25 temperature of cryogen
When to certain value, by the display equipment displays temperature value connecting with temperature sensor, temperature sensor can will be believed by route
Number it is transferred to surface display equipment, wireless signal transmitting terminal also can be used sends the signal to ground and show, according to temperature value
Operation control valve 18 is used for the unlatching of valve.
The further technical solution of the present invention is that the immersible pump 24 is frequency conversion adjustable speed immersible pump 24.
Embodiment 2
As shown in Fig. 2, the basic structure of embodiment 2 is same as Example 1, the difference is that, 18 other side of control valve
Nozzle connect a spiral element, spiral element end be cecum, spiral element spiral section position be equipped with it is several for discharging
Aperture.
Embodiment 3, as shown in figure 3, the basic structure of embodiment 3 is same as Example 1, the difference is that, it is described into
Expects pipe 19 has two, one of them is main feed pipe 19, as a kind of component charging for generating cryogen while being also load connection
Part, another is time feed pipe 19, and another component for generating cryogen 25 is fed, main feed pipe 19 and time feed pipe 19
(the western 220V electromagnetic water valve of moral power may be selected, size is according to the pipe of discharge nozzle in the material inlet valve 27 that lower end is respectively equipped with control charging
Diameter selection), the storing pipe 20 is equipped with the air pressure balance mouth 23 for preventing centrifugal pump inlet hypotony.
For the targeting low temperature fracturing process of embodiment 1 and embodiment 2, comprising the following steps:
Step 1, the ammonium chloride for weighing certain mass are put into container first, then weigh the barium hydroxide of certain mass,
It is put into container second, and makes the mass ratio 1:2 of ammonium chloride and barium hydroxide.
Step 2 pours into ethyl alcohol into container first, according to 1g barium hydroxide: the configuration of 0.25g ethyl alcohol is sufficiently stirred, directly
Ammonium chloride is had no to container first bottom, and is run through feed pipe 19 and be sent into storing pipe 20 and immersible pump 24；
Step 3. re-injects ethyl alcohol, and the ammonium chloride being trapped on 19 tube wall of feed pipe is sent into storing pipe 20 and immersible pump
In 24；
Step 4. pours into ethyl alcohol into container second, according to 1g barium hydroxide: the configuration of 0.25g ethyl alcohol is sufficiently stirred, directly
Barium hydroxide is had no to container second bottom, and is run through feed pipe 19 and be sent into storing pipe 20 and immersible pump 24；
Step 5. re-injects ethyl alcohol, and the barium hydroxide being trapped on 19 tube wall of feed pipe is sent into immersible pump 24
It is interior；
Step 6. utilizes immersible pump after immersible pump 24 reaches certain layer position by the starting immersible pump 24 that is powered on ground
24 stirring ammonium chlorides and barium hydroxide, react ammonium chloride and barium hydroxide sufficiently, at this time liquid in immersible pump 24
Temperature can achieve -30 DEG C or so；
Step 7. temperature sensor sends a signal to display, and 18 valve of control valve is opened in control, at this time in immersible pump 24
Liquid will be along before, aperture enters among specific stratum on L shape pipe or spiral element, and rock is opened under cold service
It splits, and the constraint of traditional crustal stress can be broken through, complicated Fracture Networks are generated on certain layer position；
Step 8. reaches another certain layer position by the position that feed pipe 19 controls immersible pump 24 on ground, repeats the above behaviour
Make, realize the effect in different layers position low temperature broken rock, achievees the purpose that target low temperature broken rock.
The further technical solution of the present invention is that ethyl alcohol is that ethyl alcohol percent by volume is in the step 1 and/or step 2
63.4% or more ethanol solution or straight alcohol.
The further technical solution of the present invention is that the amount of the ethyl alcohol for flushing in the step 2 is 0.5-10kg.
The further technical solution of the present invention is that the amount that step 4 is used as the ethyl alcohol of flushing is 0.5-10kg.
For the targeting low temperature fracturing process of embodiment 3, step and above-mentioned fracturing process are essentially identical, and difference is, can
With by ammonium chloride-alcohol mixed solution, barium hydroxide-alcohol mixed solution passes through main feed pipe 19 and time feed pipe respectively
19 are fed, and control inlet amount and charging beginning in by the material inlet valve 27 on main feed pipe 19 and time feed pipe 19
It is disconnected, while 24 inlet pressure of immersible pump is too low in order to prevent, air pressure balance mouth 23 is arranged at the top of storing pipe 20, so that storing pipe
Pressure is identical as its ambient atmosphere pressure always in 20.
It should be pointed out that this law be not limited to ammonium chloride and barium hydroxide cryogen 25, ammonium chloride is made by mixing
Other ammonium salts, such as ammonium sulfate can be used.
The present invention makes full use of the characteristics of centrifugal pump, so that ammonium chloride and barium hydroxide fill in storing pipe 20 and pump
Divide reaction to generate low temperature, and be pressurized, when the control valve of storing pipe is closed, pressure is always maintained in pump, while centrifugal pump rotates
Stirring action is played, ammonium chloride is accelerated to react progress with barium hydroxide, when the discharge port arrival of storing pipe needs pressure break
When rock stratum, control valve is opened, cryogen, which is sprayed, implements cryogenic freezing to rock stratum, generates complicated split in destination layer after the freezing of rock stratum
Gap network.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of targeting low temperature fracturing device, it is characterised in that: including storing pipe, centrifugal pump, feed pipe and discharge nozzle, it is described go out
Expects pipe is mounted on the outlet of centrifugal pump, and discharge nozzle is equipped with control valve, and discharge nozzle is equipped with discharge port, the storing pipe and centrifugation
Pump intake is connected, and generates for cryogen and/or temporarily stores cryogen, and the feed pipe is connected with storing pipe upper end, is used for cryogen
Or the group of generation cryogen is distributed into storing pipe, while feed pipe also carries out the load connection of targeting pressure break as decentralization discharge port
Part.
2. as described in claim 1 targeting low temperature fracturing device, it is characterised in that: the cryogen by normal-temperature component A and group
B reaction is divided to generate, component A and component B are added in storing pipe and centrifugal pump by feed pipe.
3. targeting low temperature fracturing device as claimed in claim 2, it is characterised in that: the feed pipe has two, one of them is
Main feed pipe as a kind of component charging for generating cryogen while being also load connector, and another is time feed pipe, for giving birth to
It is fed at another component of cryogen, the lower end of main feed pipe and time feed pipe is respectively equipped with the material inlet valve of control charging, institute
It states storing pipe and is equipped with the air pressure balance mouth for preventing centrifugal pump inlet hypotony.
4. targeting low temperature fracturing device as described in claims 1 to 3 any one, it is characterised in that: the centrifugal pump inversion is set
It sets, the discharge nozzle is L shape pipe or spiral element, and L shape pipe or spiral element the other end are cecum, and in the level of L shape pipe
Several apertures for discharging are provided in section, spiral element is also equipped with several apertures for discharging at spiral section position.
5. targeting low temperature fracturing device as claimed in claim 4, it is characterised in that: the centrifugal pump is immersible pump, immersible pump packet
It includes top cover, middle case, sealing ring one, stator, lower bearing, cooling oil, sealing ring two, oil cylinder cover, sealing ring three, the pump housing, change
Into chassis, impeller, connecting key, mechanical seal, rotor, upper bearing (metal), bearing block；
Sealing ring one is installed, bearing block is mounted on top cover lower end, and upper bearing (metal) is mounted on bearing between top cover and middle case
In seat, rotor one end is mounted on upper bearing (metal), and the other end is mounted on lower bearing, and lower bearing is mounted on middle case lower end, is turned
Stator, the rotor peripheral hardware mechanical seal of lower bearing lower part are equipped in middle case outside son, mechanical seal is outside cooling oil, mechanical
The lower end of sealing is equipped with oil cylinder cover, middle case and oil cylinder cover and seals equipped with sealing ring two, and oil cylinder cover is with the pump housing using close
Seal three seals, and pumps intracorporal rotor tip and is equipped with the impeller positioned by connecting key, and pump housing side is equipped with submersible pump outlet；
The improvement chassis is that sheet iron welding surrounds, and lower end opening, top is welded on the pump housing；
After immersible pump is inverted, the welding ring for improving chassis and storing tube end is welded to connect, discharge nozzle is mounted on immersible pump
In outlet.
6. targeting low temperature fracturing device as claimed in claim 5, it is characterised in that: be equipped in the immersible pump or in storing pipe
Measure the temperature sensor of refrigerant temperature.
7. a kind of targeting low temperature fracturing process, which comprises the following steps:
Component A is sent into storing pipe and centrifugal pump by step 1 by feed pipe；
Component B is sent into storing pipe and centrifugal pump by step 2 by feed pipe；
Step 3, component A and component B react in storing pipe and centrifugal pump, generate the cryogen of low temperature, while starting centrifugal pump and adding
Speed reaction carries out；
Centrifugal pump is transferred to underground the position for needing low temperature pressure break by the feed pipe as load connector by step 4；
Control valve in step 5, opening discharge nozzle, cryogenic coolant are sprayed from discharge port, carry out targeting low temperature pressure to subterranean strata
It splits.
8. targeting low temperature fracturing process as claimed in claim 7, it is characterised in that: the component A is ammonium salt, and the component B is
Barium hydroxide.
9. targeting low temperature fracturing process as claimed in claim 8, it is characterised in that: the component A is that ammonium chloride and ethyl alcohol mix
Solution, the component B are barium hydroxide and alcohol mixed solution.
10. targeting low temperature fracturing process as claimed in claim 9, it is characterised in that: the concentration of alcohol is that percent by volume is
63.4% or more, chloride leach forms uniform solution in ethanol, and barium hydroxide dissolution also forms uniform in ethanol
Solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431500.5A CN109469469B (en) | 2018-11-26 | 2018-11-26 | Targeted low-temperature fracturing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811431500.5A CN109469469B (en) | 2018-11-26 | 2018-11-26 | Targeted low-temperature fracturing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109469469A true CN109469469A (en) | 2019-03-15 |
| CN109469469B CN109469469B (en) | 2020-06-09 |
Family
ID=65674175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811431500.5A Expired - Fee Related CN109469469B (en) | 2018-11-26 | 2018-11-26 | Targeted low-temperature fracturing device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109469469B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111297549A (en) * | 2020-03-19 | 2020-06-19 | 中国人民解放军陆军特色医学中心 | Wound first aid ice bag convenient to carry and heat preservation storage facilities thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6010714A (en) * | 1996-11-22 | 2000-01-04 | Closure Medical Corporation | Non-thermogenic heat dissipating biomedical adhesive compositions |
| CN103726819A (en) * | 2013-12-27 | 2014-04-16 | 中国石油大学(华东) | Method of low-temperature gas-assisted coalbed methane fracturing technology |
| CN104061013A (en) * | 2014-06-23 | 2014-09-24 | 中国矿业大学 | Method and device for improving permeability of low-permeability coal bed by utilizing freezing process |
| CN204200600U (en) * | 2014-09-12 | 2015-03-11 | 孙鹏 | A kind of single-phase or three-phase submersible pump |
| CN104806219A (en) * | 2015-04-13 | 2015-07-29 | 中国石油大学(华东) | Oil and gas reservoir increased permeation and blocking removal device and increased permeation and blocking removal method thereof |
-
2018
- 2018-11-26 CN CN201811431500.5A patent/CN109469469B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6010714A (en) * | 1996-11-22 | 2000-01-04 | Closure Medical Corporation | Non-thermogenic heat dissipating biomedical adhesive compositions |
| CN103726819A (en) * | 2013-12-27 | 2014-04-16 | 中国石油大学(华东) | Method of low-temperature gas-assisted coalbed methane fracturing technology |
| CN104061013A (en) * | 2014-06-23 | 2014-09-24 | 中国矿业大学 | Method and device for improving permeability of low-permeability coal bed by utilizing freezing process |
| CN204200600U (en) * | 2014-09-12 | 2015-03-11 | 孙鹏 | A kind of single-phase or three-phase submersible pump |
| CN104806219A (en) * | 2015-04-13 | 2015-07-29 | 中国石油大学(华东) | Oil and gas reservoir increased permeation and blocking removal device and increased permeation and blocking removal method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 唐一平: "国内外无水压裂技术研究现状与发展趋势", 《技术研究》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111297549A (en) * | 2020-03-19 | 2020-06-19 | 中国人民解放军陆军特色医学中心 | Wound first aid ice bag convenient to carry and heat preservation storage facilities thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109469469B (en) | 2020-06-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104040165B (en) | Apparatus and method for energy stores | |
| CN104034630A (en) | Fracturing liquid performance experimental system for geological transformation of oil and gas reservoir | |
| CN107842392A (en) | A kind of salt cave caisson | |
| CN108386173A (en) | A kind of underground drug adding device and method for foam drainage gas recovery technique | |
| CN109469469A (en) | A kind of targeting low temperature fracturing device and method | |
| CN210269442U (en) | Triaxial coal petrography multi-field multiphase coupling fracturing experimental apparatus | |
| CN104074497A (en) | Simulation test device in gas well foam drainage chamber | |
| CN208057098U (en) | A kind of well casing gas recovery device | |
| CN109931036A (en) | The method that underground heat and oil gas are adopted altogether in petroleum or natural gas extraction | |
| CN114635678B (en) | Microorganism combined hydraulic fracturing coal seam permeability-increasing system and method | |
| CN218871845U (en) | Oil field water injection charge device | |
| CN202673265U (en) | Oil well carbon dioxide foam injection device | |
| CN209724306U (en) | A kind of conveying device of carbon dioxide drive | |
| CN108590621B (en) | System and method for high-pressure sand adding after hydraulic fracturing remote continuous pump in coal mine | |
| CN208168859U (en) | The device in the electric pulse collaboration anti-reflection coal seam of frozen-thawed | |
| CN111101899A (en) | Oil sleeve annulus dosing lifting device and method | |
| CN207568565U (en) | It mixes dilute device and mixes dilute system | |
| CN213087962U (en) | Oil exploitation device | |
| CN113090238B (en) | Coupling wave-focusing surface-shaped energy blocking synergistic device | |
| CN210829206U (en) | Device for exploiting combustible ice on land | |
| CN115142831A (en) | Method for driving MVR (mechanical vapor recompression) salt production by utilizing brine excess pressure of salt cavern gas storage | |
| CN114109339A (en) | Carbon dioxide rapid automatic foaming fracturing equipment and method | |
| CN202420321U (en) | Mechanical explosive loading device | |
| CN109826611A (en) | A kind of two-chamber rotation impulse sand fracturing device | |
| CN208518903U (en) | Anticorrosive anti-wear mortar pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200609 Termination date: 20211126 |