CN111472743A - Composite energy-containing rod for generating controllable shock waves and manufacturing method thereof - Google Patents
Composite energy-containing rod for generating controllable shock waves and manufacturing method thereof Download PDFInfo
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- CN111472743A CN111472743A CN202010290092.7A CN202010290092A CN111472743A CN 111472743 A CN111472743 A CN 111472743A CN 202010290092 A CN202010290092 A CN 202010290092A CN 111472743 A CN111472743 A CN 111472743A
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- 230000035939 shock Effects 0.000 title claims abstract description 44
- 239000002131 composite material Substances 0.000 title claims abstract description 30
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 65
- 229910052751 metal Inorganic materials 0.000 claims abstract description 61
- 239000002184 metal Substances 0.000 claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 35
- 238000011049 filling Methods 0.000 claims abstract description 10
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 25
- 239000000853 adhesive Substances 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 9
- 229910000861 Mg alloy Inorganic materials 0.000 claims description 7
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 7
- GDDNTTHUKVNJRA-UHFFFAOYSA-N 3-bromo-3,3-difluoroprop-1-ene Chemical compound FC(F)(Br)C=C GDDNTTHUKVNJRA-UHFFFAOYSA-N 0.000 claims description 6
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- AXZAYXJCENRGIM-UHFFFAOYSA-J dipotassium;tetrabromoplatinum(2-) Chemical compound [K+].[K+].[Br-].[Br-].[Br-].[Br-].[Pt+2] AXZAYXJCENRGIM-UHFFFAOYSA-J 0.000 claims description 6
- 230000001965 increasing effect Effects 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- LYGJENNIWJXYER-UHFFFAOYSA-N nitromethane Chemical compound C[N+]([O-])=O LYGJENNIWJXYER-UHFFFAOYSA-N 0.000 claims description 6
- 239000012188 paraffin wax Substances 0.000 claims description 6
- 229910001487 potassium perchlorate Inorganic materials 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 5
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 229920002530 polyetherether ketone Polymers 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000009987 spinning Methods 0.000 claims description 3
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 3
- 229910052721 tungsten Inorganic materials 0.000 claims description 3
- 239000010937 tungsten Substances 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 2
- 229910052715 tantalum Inorganic materials 0.000 claims description 2
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005516 engineering process Methods 0.000 abstract description 5
- 238000011161 development Methods 0.000 description 8
- 230000035699 permeability Effects 0.000 description 7
- 230000006835 compression Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 238000004880 explosion Methods 0.000 description 4
- 239000003079 shale oil Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 238000005474 detonation Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000012634 fragment Substances 0.000 description 2
- 230000002706 hydrostatic effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000003079 width control Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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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
- 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
- E21B43/263—Methods for stimulating production by forming crevices or fractures using explosives
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B25/00—Compositions containing a nitrated organic compound
- C06B25/36—Compositions containing a nitrated organic compound the compound being a nitroparaffin
-
- C—CHEMISTRY; METALLURGY
- C06—EXPLOSIVES; MATCHES
- C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
- C06B33/00—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide
- C06B33/06—Compositions containing particulate metal, alloy, boron, silicon, selenium or tellurium with at least one oxygen supplying material which is either a metal oxide or a salt, organic or inorganic, capable of yielding a metal oxide the material being an inorganic oxygen-halogen salt
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- Chemical & Material Sciences (AREA)
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- Mining & Mineral Resources (AREA)
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- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The invention relates to a composite energy-containing rod for generating controllable shock waves and a manufacturing method thereof, and aims to solve the problems that safety problems exist in the existing dynamic measures and an obvious anti-reflection effect is difficult to generate by an electric pulse technology. According to the composite energy-containing rod for generating the controllable shock wave, the outer shell and the inner tube are both hollow straight tubes with two closed ends; the outer shell and the inner tube are coaxially sleeved, the outer diameter of the outer shell is 18-23mm, the length of the outer shell is 95-105mm, the outer diameter of the inner tube is 4-8mm, the length of the inner tube is 72-77mm, the metal wire is arranged along the axial line of the outer shell and the inner tube, and two ends of the metal wire extend out of the outer shell and are fixedly installed; the inner tube is filled with powdery energetic materials, and a liquid energetic material is filled between the inner tube and the outer shell. The manufacturing method of the composite type energy-containing rod for generating the controllable shock wave comprises the steps of preparing each component, assembling the metal wire, the end head of the inner pipe and the inner pipe, filling the powdery energy-containing material into the inner pipe and packaging the powdery energy-containing material through the end head of the inner pipe, assembling the inner pipe, the end cover and the straight pipe, and filling the liquid energy-containing material into the straight pipe and packaging the liquid energy-containing material through the end cover.
Description
Technical Field
The invention belongs to the technical field of shock wave generating equipment, and particularly relates to a composite energy-containing rod for generating controllable shock waves and a manufacturing method thereof.
Background
Shale gas and compact oil gas development needs to improve the permeability of a reservoir to increase the yield, at present, high-energy gas fracturing, deep-space pre-fracturing blasting and carbon dioxide fracturing are generally adopted for permeation, but the generated energy is huge, so that safety problems of a shaft and a drilled hole are easily caused. In the electric pulse technology, the shock wave generated by the liquid electric effect and the metal wire electric explosion is used as another penetration mode; however, the energy of the shock wave is only from the electric energy stored in the electric pulse equipment, so the output shock wave is too small to generate obvious anti-reflection effect.
The patent 'a permeability-increasing type energy-gathering rod for generating controllable shock waves and a preparation method thereof' (Z L201810032262.4) discloses an energy-gathering rod special for permeability increasing of a coal bed, aiming at the specific requirement of permeability increasing of the coal bed, when the energy-gathering is applied to the development of shale oil gas and dense oil gas, the energy-gathering rod made of organic insulating materials cannot meet the requirement of bearing high static pressure, inorganic insulating materials cannot bear the shock waves, the volume is small, the filling amount of energy-containing mixtures is small, the intensity of the generated shock waves is small, the output shock waves are too small, the obvious permeability increasing effect is difficult to generate, and therefore, the development of the shale oil gas and the dense oil gas is restricted.
Disclosure of Invention
The invention aims to provide a composite energy-containing rod for generating controllable shock waves, so as to solve the problems that the safety problem exists in the conventional dynamic measures and the obvious anti-reflection effect is difficult to generate by the electric pulse technology.
The second purpose of the invention is to provide a manufacturing method of the composite type energy-containing rod for generating controllable shock waves.
In order to achieve the first object, the solution of the invention is:
a composite energy-containing rod for generating controllable shock waves comprises a shell, a metal wire and an inner tube, wherein the shell and the inner tube are both hollow straight tubes with two closed ends; the outer shell and the inner tube are coaxially sleeved, the outer diameter of the outer shell is 18-23mm, the length of the outer shell is 95-105mm, the outer diameter of the inner tube is 4-8mm, the length of the inner tube is 72-77mm, the metal wire is arranged along the axial line of the outer shell and the inner tube, and two ends of the metal wire extend out of the outer shell and are fixedly installed; the inner tube is filled with powdery energetic materials, and a liquid energetic material is filled between the inner tube and the outer shell.
Preferably, the shell comprises a straight pipe and end covers inserted at two ends of the straight pipe, and the straight pipe is of a tubular structure made of metal materials; the end cover is made of non-metal materials, and a fixing column is arranged at the center of the end cover towards the direction of the straight pipe; the inner pipe is made of glass, inner pipe end heads are arranged at two ends of the inner pipe and are in contact with the fixing columns; the end cover and the inner pipe end head are provided with through holes with the inner diameter of 0.3-0.5mm along the axis.
Preferably, the diameter of the metal wire is 300-500 μm, and the material is tungsten or tantalum.
Preferably, the outer diameter of the shell is 20mm, the length of the shell is 100mm, and the wall thickness of the shell is 2 mm; the outer diameter of the inner pipe is 6mm, and the length of the inner pipe is 75 mm.
Preferably, the powdery energetic material comprises 20-30% of aluminum powder, 65-75% of ammonium perchlorate or potassium perchlorate and 3-5% of paraffin wax by mass, and the packing density of the powdery energetic material is 1.0-1.2 g/cm3。
Preferably, the liquid energetic material comprises 95 mass percent of nitromethane and 5 mass percent of ethylenediamine.
Preferably, the outer surface of the straight pipe is provided with a plurality of rows of groove body aggregates along the axial direction of the straight pipe, and each row of groove body aggregate comprises a plurality of rectangular grooves arranged along the circumferential direction of the straight pipe.
To achieve the second object, the solution of the present invention is: the manufacturing method of the composite energy-containing rod for generating the controllable shock wave comprises the following steps;
s1, processing two end covers by adopting a polyether-ether-ketone bar, processing a straight pipe by adopting a soluble aluminum-magnesium alloy pipe, and processing a rectangular groove on the outer surface of the processed straight pipe;
s2, the metal wire is penetrated through the through hole of one of the inner tube ends, the end part of the metal wire is firmly adhered with the inner tube end by adopting an adhesive, and the other end of the metal wire is penetrated through the inner tube body;
s3, mixing aluminum powder, ammonium perchlorate or potassium perchlorate and paraffin in a container uniformly to complete the preparation of the powdery energetic material;
s4, filling the powdery energetic material into the inner tube and tamping;
s5, passing a metal wire through the other end of the inner pipe, coating glue on the side surface of the end of the inner pipe, inserting the end of the inner pipe into the end of the inner pipe in a spinning mode, straightening the metal wire, and coating adhesive at the through hole of the end of the inner pipe;
s6, mixing the nitromethane and the ethylenediamine uniformly in a container to complete the preparation of the liquid energetic material;
s7, passing the metal wire at one end of the inner tube through the through hole of one end cover, coating adhesive on the side surface of the end cover, screwing the end cover into one end of the outer shell, and leading the metal wire at the other end of the inner tube out of the outer shell; and injecting a liquid energetic material into the shell, then penetrating a metal wire into a through hole of the other end cover, coating glue on the side surface of the end cover, screwing the end cover into the shell, and coating an adhesive at the through hole of the end cover for packaging to finish the manufacture of the energetic rod.
Preferably, the method further comprises the following steps:
after the adhesive is completely solidified, the prepared energy-containing rod is conveyed into a pressure container, water is injected into the container, and the pressure of the container is increased to 45Mpa and kept for 5 hours;
and (4) taking out the energy-containing rod from the pressure container, and checking whether the adhesive surface has water seepage, wherein the water-impermeable energy-containing rod is a qualified product.
Preferably, the method further comprises the following steps:
the energy storage is 1.5kJ pulse power driving source, a driving experiment is carried out on the energy-containing rod under the conditions that the rated working voltage is 30kV and the pulse current is 30kA, the impact wave amplitude is actually measured at a position 50-55cm away from the energy-containing rod, and the energy-containing rod with the impact wave amplitude larger than 10MPa and smaller than 20MPa is a qualified product.
The invention has the beneficial effects that:
1. the composite energy-containing rod for generating controllable shock waves can bring obvious anti-reflection effect, and simultaneously avoids the safety problem caused by dynamic measures, so that the presplitting energy-containing rod can well improve the permeability of a reservoir stratum while ensuring the safety.
2. The composite energy-containing rod for generating the controllable shock wave has high compressive strength, and can be applied to development of shale oil gas and compact oil gas which need to bear a high water pressure environment; the liquid energetic material in the rod can not be compressed, the compression resistance requirement of the metal shell is reduced, and the compression resistance strength of the whole energetic rod is further improved, so that the rod can work in deeper oil, gas and water wells.
3. When the energy-containing rod explodes, the metal shell can be fried into fragments with set sizes according to the depth and the width of the rectangular groove; in addition, due to the adoption of the solubility of the aluminum-magnesium alloy, fragments of the straight pipe can be dissolved in liquids such as oil, gas and water, and adverse effects cannot be left, so that the development of shale gas and dense oil gas can be further promoted.
4. The powdery energetic material, the liquid energetic material and the filling mode are easier to detonate by the metal wire, and the powdery energetic material and the liquid energetic material can react more fully in the driving reaction process.
5. The inner tube end and the inner tube, the end cover and the straight tube, as well as the metal wire, the end cover and the inner tube end are bonded and sealed by the adhesive, so that the problem that the energy-containing rod cannot seep water when used underwater is ensured, and the detonation effect is further ensured.
6. The metal shell is filled with the liquid energetic material, so that the internal and external water pressures of the energetic rod are balanced, the requirement of bearing high static pressure is met, and water in a shaft cannot enter the inside of the energetic rod.
Drawings
FIG. 1 is a cross-sectional view of a composite energetic rod for generating controlled shock waves in accordance with the present invention;
FIG. 2 is a schematic view of the external structure of a composite energetic rod;
FIG. 3 is a schematic structural view of an end cap;
FIG. 4 is a waveform of a shock wave generated by the pre-split energy-containing rod of the example.
The reference numbers are as follows:
1-outer shell, 2-metal wire, 3-inner tube, 4-powdery energetic material, 5-liquid energetic material, 6-straight tube, 7-inner tube end, 8-end cover and 9-fixing column.
Detailed Description
The present invention will be described in further detail with reference to the following specific examples:
a composite energetic rod for generating controllable shock waves is shown in figures 1 to 4 and comprises an outer shell 1, a metal wire 2, an inner tube 3, a powdery energetic material 4 and a liquid energetic material 5.
The shell 1 is a hollow straight pipe with two closed ends; the outer diameter of the shell 1 is 20mm, the length is 100mm, and the wall thickness is 2 mm; the housing 1 comprises a straight tube 6 and an end cap 8.
The straight pipe 6 is a tubular structure made of soluble aluminum-magnesium alloy. The outer surface of the straight pipe 6 is provided with a plurality of rows of groove body aggregates along the axial direction, and each row of groove body aggregates comprises a plurality of rectangular grooves arranged along the circumferential direction of the straight pipe 6. As shown in fig. 2, the outward appearance of rectangular channel is vertical groove and hoop groove, and the rectangular channel not only can guarantee that shell 1 bears the hydrostatic pressure within the design range, when containing the stick explosion moreover, can will be according to the depth and the width control metal casing 1 of rectangular channel fry into the piece of settlement size, and in addition adopt almag's soluble characteristics, the piece of straight tube 6 can be dissolved in liquid such as oil, gas, water, can not leave adverse effect.
The number of the end covers 8 is two, the end covers 8 are inserted into two ends of the straight pipe 6, the end covers 8 are made of polyether-ether-ketone bars, fixing columns 9 are arranged in the centers of the end covers 8 towards the direction of the straight pipe 6, and through holes with the inner diameter of 0.5mm are formed in the end covers 8 along the axes of the end covers.
The inner pipe 3 is a hollow straight pipe with two closed ends; the outer diameter of the inner pipe 3 is 6mm, and the length is 75 mm; the inner tube 3 is made of glass; inner pipe end heads 7 are arranged at two ends of the inner pipe 3, and the inner pipe end heads 7 are inserted at the end part of the inner pipe 3; the inner tube end 7 is provided with a through hole with the inner diameter of 0.5mm along the axis.
The outer shell 1 is sleeved outside the inner tube 3, the outer shell 1 is coaxial with the inner tube 3, and the inner tube end heads 7 at two ends of the inner tube 3 are in contact with the fixing columns 9 on the end covers 8.
Compared with the existing shell which is only made of nonmetal materials or a high-strength aluminum-magnesium alloy shell, the composite energy-containing rod adopts the glass inner tube 3 with smaller diameter to fill the powdery energy-containing material 4 through the combination of the outer shell 1 and the inner tube 3, so that the compressive strength is further improved. The powdery energetic material 4 is directly detonated by the metal wire 2, then the liquid energetic material 5 on the outer layer is detonated, and the non-compressibility of the liquid energetic material 5 is utilized, so that the compression resistance requirement of the metal shell is reduced, and the compression resistance strength of the whole energetic rod is improved, and the energetic rod can work in deeper oil, gas and water wells.
The metal wire 2 is arranged along the axes of the outer shell 1 and the inner tube 3, and two ends of the metal wire extend out of the outer shell 1 and are fixedly installed; the inner tube end 7 and the inner tube 3, the end cover 8 and the straight tube 6, as well as the metal wire 2 and the end cover 8 and the inner tube end 7 are bonded and sealed by the adhesive, so that the problem of water seepage cannot occur when the energy-containing rod is used underwater, and the detonation effect is further ensured.
The wire 2 has a diameter of 500 μm and is made of tungsten. The powdery energetic material 4 is filled between the metal wire 2 and the inner tube 3, the liquid energetic material 5 is filled between the inner tube 3 and the outer shell 1, and the metal outer shell is filled with the liquid energetic material 5, so that the internal and external water pressures of the energetic rod are balanced, and the water in a shaft cannot enter the inside of the energetic rod.
The metal wire 2 drives the powdery energetic material 4 and the liquid energetic material 5 with different masses to generate shock waves to act on the reservoir, the generated energy can be controlled according to actual requirements, and the generated energy is far larger than the shock wave energy output by an electric pulse technology, so that the permeability of the reservoir can be well improved while the safety is ensured.
The powdery energetic material 4 comprises 27 mass percent of aluminum powder, 70 mass percent of strong oxidant ammonium perchlorate or potassium perchlorate and 3 mass percent of insensitive agent paraffin. Of energetic material 4 in powder formPacking density is 1.0g/cm3The loading amount is 1 g; the liquid energetic material 5 comprises 95 mass percent of liquid oxidant nitromethane and 5 mass percent of sensitizer ethylenediamine.
The manufacturing method of the composite energy-containing rod for generating the controllable shock wave comprises the following steps;
s1, processing two end covers 8 by adopting a polyether-ether-ketone bar, processing a straight pipe 6 by adopting a soluble aluminum-magnesium alloy pipe, and processing a longitudinal groove and a circumferential groove on the outer surface of the processed straight pipe 6;
s2, the metal wire 2 is penetrated through the through hole of one inner pipe end head 7, the end part of the metal wire is firmly adhered with the inner pipe end head 7 by adopting an adhesive, and the other end of the metal wire 2 is penetrated through the body of the inner pipe 3;
s3, mixing aluminum powder, ammonium perchlorate or potassium perchlorate and paraffin in a container uniformly to complete the preparation of the powdery energetic material 4;
s4, filling the powdery energetic material 4 into the inner tube 3 and tamping, wherein the filling density is 1.0g/cm3；
S5, the metal wire 2 penetrates through the other inner tube end 7, glue is coated on the side face of the inner tube end 7, the inner tube end 7 is inserted into the end part of the inner tube 3 in a spinning mode, then the metal wire 2 is straightened, and an adhesive is coated at the through hole of the inner tube end 7;
s6, mixing the nitromethane and the ethylenediamine uniformly in a container to complete the preparation of the liquid energetic material 5;
s7, the metal wire 2 at one end of the inner tube 3 passes through the through hole of one end cover 8, the side face of the end cover 8 is coated with adhesive, the end cover 8 is screwed into one end of the outer shell 1, and the metal wire 2 at the other end of the inner tube 3 is led out of the outer shell 1; injecting a liquid energetic material 5 into the shell 1, then penetrating the metal wire 2 into a through hole of the other end cover 8, gluing the side surface of the end cover 8, screwing the end cover 8 into the shell 1, and coating an adhesive at the through hole of the end cover 8 for packaging to complete the assembly of the energetic rod structure.
S8, after the adhesive is completely solidified, sending the prepared energy-containing rod into a pressure container, injecting water into the container, and keeping the pressure of the container for 5 hours when the pressure is increased to 45 Mpa;
s9, taking out the energy-containing rod from the pressure container, checking whether the adhesive surface has water seepage, and judging the water-impermeable energy-containing rod as a qualified product. The energy-containing rod which is permeated with water is regarded as defective and discarded.
S10, taking an energy-containing rod with a machining amount of 3% once, performing a driving experiment on the energy-containing rod by using a pulse power driving source with the energy storage of 1.5kJ under the conditions of a rated working voltage of 30kV and an output pulse current of 30kA, and actually measuring the amplitude of the shock wave at a position 55cm away from the energy-containing rod, wherein the amplitude of the shock wave is more than 10MPa and less than 20MPa, and the energy-containing rod is a qualified product.
The using method of the energy-containing rod comprises the following steps: drilling a hole in a reservoir; installing an orifice device; filling the drill hole with water; connecting the energy-containing rod with a pulse power driving source; placing the energy-containing rod at a set position of the drill hole; and starting a pulse power driving source to discharge through the energy-containing rod, and penetrating the reservoir by the shock wave generated by the energy-containing rod.
The waveform of the shock wave generated by the energy-containing rod in this example is shown in FIG. 4. The energy-containing rod can directly drive the energy-containing material with any mass through the metal wire electric explosion plasma, generate the required controllable shock wave, and can well improve the permeability of a reservoir stratum while ensuring the safety, thereby further promoting the development of shale gas and compact oil gas.
Compared with the existing shell which is only made of nonmetal materials or the high-strength aluminum-magnesium alloy shell, the composite energy-containing rod provided by the invention adopts the glass inner tube with smaller diameter to fill the powdery energy-containing material, so that the compressive strength of the composite energy-containing rod is further improved, and the composite energy-containing rod can be applied to development of shale oil gas and compact oil gas which need to bear a high water pressure environment; the powdery energetic material is directly detonated by a metal wire, then the liquid energetic material on the outer layer is detonated, and the compressibility of the liquid energetic material is utilized, so that the compression resistance requirement of the metal shell is reduced, and the compression resistance strength of the whole energetic rod is improved, so that the energetic rod can work in deeper oil, gas and water wells.
The straight tube surface is equipped with a plurality of rectangular channels, and the rectangular channel not only can guarantee that the shell bears the hydrostatic pressure in the design range, contains moreover when can stick the explosion, can will be according to the depth of rectangular channel and the fried piece that sets for the size of width control metal casing, in addition adopt almag's solubility, the piece of straight tube can be dissolved in liquid such as oil, gas, water, can not leave adverse effect, consequently can further promote shale gas, the development of fine and close oil gas.
The proportion and the filling mode of the powdery energetic material and the liquid energetic material are easier to detonate by the metal wire, and the powdery energetic material and the liquid energetic material can react more fully in the driving reaction process.
The inner tube end and the inner tube, the end cover and the straight tube, as well as the metal wire, the end cover and the inner tube end are bonded and sealed by the adhesive, so that the problem that the energy-containing rod cannot seep water when used underwater is ensured, and the detonation effect is further ensured.
The metal shell is filled with the liquid energetic material, so that the internal and external water pressures of the energetic rod are balanced, the requirement of bearing high static pressure is met, and water in a shaft cannot enter the inside of the energetic rod.
According to the composite energy-containing rod for generating the controllable shock wave, the metal wire drives the energy-containing materials with different masses to generate the shock wave to act on the reservoir, the generated energy can be controlled according to actual requirements, and the generated energy is far larger than the shock wave energy output by an electric pulse technology, so that an obvious anti-reflection effect can be brought, and meanwhile, the safety problem caused by adopting dynamic measures is avoided.
The above description is only an embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or applied directly or indirectly to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A compound energetic stick for producing controllable shock wave is characterized in that: the metal wire comprises a shell (1), a metal wire (2) and an inner tube (3), wherein the shell (1) and the inner tube (3) are both hollow straight tubes with two closed ends; the outer shell (1) and the inner tube (3) are coaxially sleeved, the outer diameter of the outer shell (1) is 18-23mm, the length of the outer shell is 95-105mm, the outer diameter of the inner tube (3) is 4-8mm, the length of the inner tube is 72-77mm, the metal wire (2) is arranged along the axial lines of the outer shell (1) and the inner tube (3), and two ends of the metal wire extend out of the outer shell (1) and are fixedly installed; the inner tube (3) is filled with powdery energetic materials (4), and liquid energetic materials (5) are filled between the inner tube (3) and the outer shell (1).
2. A composite energetic rod for generating controlled shock waves in accordance with claim 1, characterized by: the shell (1) comprises a straight pipe (6) and end covers (8) inserted at two ends of the straight pipe (6), and the straight pipe (6) is of a tubular structure made of a metal material; the end cover (8) is made of non-metal materials, and a fixing column (9) is arranged at the center of the end cover (8) towards the direction of the straight pipe (6); the inner tube (3) is made of glass, inner tube end heads (7) are arranged at two ends of the inner tube (3), and the inner tube end heads (7) are in contact with the fixing columns (9); the end cover (8) and the end head (7) of the inner pipe are provided with through holes with the inner diameter of 0.3-0.5mm along the axial line.
3. A composite energetic rod for generating controlled shock waves in accordance with claim 2, characterized by: the diameter of the metal wire (2) is 300-500 μm, and the material is tungsten or tantalum.
4. A composite energetic rod for generating controlled shock waves according to claim 3, characterized in that: the outer diameter of the shell (1) is 20mm, the length of the shell is 100mm, and the wall thickness of the shell (1) is 2 mm; the outer diameter of the inner tube (3) is 6mm, and the length of the inner tube is 75 mm.
5. A composite energetic rod for generating controlled shock waves in accordance with claim 4, characterized by: the powdery energetic material (4) comprises 20-30% of aluminum powder, 65-75% of ammonium perchlorate or potassium perchlorate and 3-5% of paraffin wax by mass, and the packing density of the powdery energetic material (4) is 1.0-1.2 g/cm3。
6. A composite energetic rod for generating controlled shock waves in accordance with claim 5, characterized by: the liquid energetic material (5) comprises 95% of nitromethane and 5% of ethylenediamine in mass fraction.
7. A composite energetic rod for generating controlled shock waves in accordance with claim 6, characterized by: the outer surface of the straight pipe (6) is provided with a plurality of rows of groove body aggregates along the axial direction, and each row of groove body aggregates comprises a plurality of rectangular grooves arranged along the circumferential direction of the straight pipe (6).
8. A method of making a composite energetic rod for generating controlled shock waves in accordance with claims 1 to 7 comprising the steps of;
s1, processing two end covers (8) by adopting a polyether-ether-ketone bar, processing a straight pipe (6) by adopting a soluble aluminum-magnesium alloy pipe, and processing a rectangular groove on the outer surface of the processed straight pipe (6);
s2, the metal wire (2) penetrates through the through hole of one inner pipe end (7), the end part of the metal wire is firmly adhered to the inner pipe end (7) by adopting an adhesive, and the other end of the metal wire (2) penetrates through the body of the inner pipe (3);
s3, mixing aluminum powder, ammonium perchlorate or potassium perchlorate and paraffin in a container uniformly to complete the preparation of the powdery energetic material (4);
s4, filling the powdery energetic material (4) into the inner tube (3) and tamping;
s5, enabling the metal wire (2) to penetrate through the other inner tube end (7), gluing the side face of the inner tube end (7), inserting the inner tube end (7) into the end of the inner tube (3) in a spinning and inserting mode, straightening the metal wire (2), and coating an adhesive at the through hole of the inner tube end (7);
s6, mixing the nitromethane and the ethylenediamine uniformly in a container to complete the preparation of the liquid energetic material (5);
s7, enabling the metal wire (2) at one end of the inner tube (3) to penetrate through the through hole of one end cover (8), coating an adhesive on the side face of the end cover (8), screwing the end cover (8) into one end of the outer shell (1), and leading the metal wire (2) at the other end of the inner tube (3) out of the outer shell (1); injecting a liquid energetic material (5) into the shell (1), then penetrating the metal wire (2) into a through hole of the other end cover (8), gluing the side surface of the end cover (8), screwing the end cover (8) into the shell (1), and coating an adhesive at the through hole of the end cover (8) for packaging, thus finishing the production of the energetic rod.
9. The method of making a composite energetic rod for generating controlled shock waves as claimed in claim 8, wherein: further comprising the steps of:
after the adhesive is completely solidified, the prepared energy-containing rod is conveyed into a pressure container, water is injected into the container, and the pressure of the container is increased to 45Mpa and kept for 5 hours;
and (4) taking out the energy-containing rod from the pressure container, and checking whether the adhesive surface has water seepage, wherein the water-impermeable energy-containing rod is a qualified product.
10. The method of making a composite energetic rod for generating controlled shock waves as claimed in claim 9, wherein: further comprising the steps of:
the energy storage is 1.5kJ pulse power driving source, a driving experiment is carried out on the energy-containing rod under the conditions that the rated working voltage is 30kV and the pulse current is 30kA, the impact wave amplitude is actually measured at a position 50-55cm away from the energy-containing rod, and the energy-containing rod with the impact wave amplitude larger than 10MPa and smaller than 20MPa is a qualified product.
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| CN202010290092.7A CN111472743A (en) | 2020-04-14 | 2020-04-14 | Composite energy-containing rod for generating controllable shock waves and manufacturing method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112211600A (en) * | 2020-09-15 | 2021-01-12 | 中国石油天然气股份有限公司 | Radial confining pressure loading anti-impact structure of perforation target |
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