CN101619007B - Charge unit for unexplosive metal tube annular cutting device and preparation method thereof - Google Patents
Charge unit for unexplosive metal tube annular cutting device and preparation method thereof Download PDFInfo
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- CN101619007B CN101619007B CN2009100234319A CN200910023431A CN101619007B CN 101619007 B CN101619007 B CN 101619007B CN 2009100234319 A CN2009100234319 A CN 2009100234319A CN 200910023431 A CN200910023431 A CN 200910023431A CN 101619007 B CN101619007 B CN 101619007B
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Abstract
The invention discloses a charge unit for unexplosive metal tube annular cutting device and a preparation method thereof; the prepared charge unit comprises thermit and ignitor; wherein, the thermit comprises the following raw materials by weight percent: 70%-90% of high-energy fuel agent, 5%-20% of gas-generating agent and 1% -10% of tittle additive; the ignitor comprises aluminium magnesium alloy powder and copper oxide in a weight ratio of (2-4):(4-6). The preparation method comprises the following steps: mixing high-energy fuel agent, gas-generating agent and tittle additive evenly according to the formula of the thermit, then adding a proper amount of polyethylene glycol to mix continuously, finally filling the mixture in moulds, repressing to prepare columns with centre bores, then mixing the corresponding materials evenly according to the formula of the ignitor, filling the ignitor in the centre bores and finally sealing the centre bores with sealing papers. Because the self-resistant temperatures of the thermit and the ignitor can reach above 300 DEG C, the charge unit is in stable state, the use is very safe and the transportation is convenient.
Description
Technical field
The invention belongs to chemical technology field, particularly relate to a kind of charge unit and preparation method who is used for non-explosivity metal tube annular cutting unit.
Background technology
The metallic conduit cutting construction in the drilling well of sewer line, exploitation of oil-gas field, well and the recovery process construction, often because of artificial, mechanical, abominable reasons such as physical environment, causes metallic conduit to damage in the open air; Oil, gas well bit freezing; Accidents such as water pipe obstruction, particularly in the oil gas well mining process, along with the increase of oil gas well mining difficulty, the metal tubing string is met the card accident and is often taken place.
When the metal tubing string taking place in the oil gas well mining process meet the card accident, when perhaps handling the discarded well head in ocean, need cutting and separating.Cutting method generally adopts cutting methods such as cumulative cutting, chemical chop, cut mechanically, but these methods exist shortcomings such as environmental pollution, success ratio is low, expense is high, the activity duration is long, tend to result in greater loss to construction party.
Adopting non-explosivity metal tube annular cutting unit is a kind of ideal method; In non-explosivity metal tube annular cutting unit, thermit need be housed; Through igniting of portfire; Make its burning produce high temperature, high-pressure smelting shape metal fluid, and the physical construction through special use acts on and cut on the metal tube, realize cutting.
A kind of pyrotechnics thermite of metal cutting has been described among the US4349396; This pyrotechnics thermite has used a kind of oxygenant, a kind of metallic fuel, a kind of halogen compound sticker and sulphur, and oxygenant wherein is selected from the combined hybrid by calcium sulfite semihydrate, anhydrous calciumsulphate, magnesium-water and thing, anhydrous sodium sal epsom, anhydrous slufuric acid strontium.This patent show oxygenant at first with metallic fuel reaction, then with thermite in any hydrogen carbon thing reaction of occurring, be only the cutting target at last; Cutting effect is very limited; And can not produce heat-conducting substance during this prescription reaction, so do not have extraordinary heat conductivity, heat utilization efficiency is very low; Thereby reduce cutting effect greatly, and the halogenide sticker is heated and can produces toxic and harmful.
Chinese patent 200310108680.0 discloses a kind of pyrotechnics composition of thermal pipe cutter, is made up of thermite and gas-forming agent, and thermite then is to be mixed and made into by aluminium and red oxide of iron.But this kind thermite in actual use, is prone to produce than the large-scale combustion residue particles, and speed of response is unstable, is prone to produce deflagration phenomenon.The device that in cutting operation, results in blockage easily brings unfavorable factor to cutting operation.In addition, do not have heat-conducting substance in this prescription, can not generate heat-conducting substance in the reaction process yet; So the heat utilization efficiency during cutting is lower; And in this,, temperature of combustion was not very highly to be generally 2000 ℃~2200 ℃ in when burning prescription, had a strong impact on cutting effect, thereby caused cutting power to descend.Gas-forming agent in this patent adopts tetrafluoroethylene, and tetrafluoroethylene at high temperature reacts and discharges hydrogen fluoride gas, and this gas has stronger corrodibility, and the oil gas well environment is caused certain pollution.
Summary of the invention
Defective or deficiency to above-mentioned prior art exists the objective of the invention is, and a kind of charge unit that is used for non-explosivity metal tube annular cutting unit is provided; This charge unit adopts brand-new high-performance, the thermit and the priming mixture of environmental protection; This thermit is by high-energy combustion agent, gas generating agent and trace mineral supplement, and it is steady that it has combustionvelocity, and the heat that burning discharges is high; The metallic product temperature can reach more than 3000 ℃; Owing to wherein added heat-conducting substance, so the heat output utilization ratio is high, the heat that its burning produces acts on the metal target pipe to greatest extent.Burning back residue particles is less in addition, is not easy to stop up characteristics such as cutting unit, is fit to very much be applied to non-explosivity metal tube annular cutting unit, can cut metal tube efficiently and safely.
The objective of the invention is to realize through following technical scheme:
A kind of charge unit that is used for non-explosivity metal tube annular cutting unit, this charge unit that makes is made up of thermit and priming mixture, it is characterized in that:
Described thermit is made up of following raw materials by weight: high-energy combustion agent: 70%~90%, and gas generating agent: 5%~25%, trace mineral supplement 1%~10%, the per-cent sum of above-mentioned raw materials is 100%;
Described priming mixture is pressed (2~4) by aluminium-magnesium alloy powder and cupric oxide: the weight ratio assembly of (4~6).
In the charge unit of above-mentioned non-explosivity metal tube annular cutting unit; Described high-energy combustion agent is made up of red oxide of iron, aluminium powder, nickel powder, cupric oxide, Red copper oxide, and the weight proportion between each composition is 4: (1~2): (1~2): (0~1): (1~2).
The granularity of described cupric oxide, red oxide of iron, Red copper oxide is greater than the granularity of nickel powder, aluminium powder.
The above-mentioned preparation method who is used for the charge unit of non-explosivity metal tube annular cutting unit is characterized in that the prescription of at first pressing thermit is with high-energy combustion agent, gas generating agent, the full and uniform mixing of trace mineral supplement; Adding an amount of polyoxyethylene glycol then continues to mix; The mixture mould weight of packing into, process column form object at last, press the full and uniform mixing of prescription of priming mixture then with centre hole; In the centre hole of going into column form object in bulk, use sealed paper center seal hole at last.
The charge unit that is used for non-explosivity metal tube annular cutting unit of the present invention, the heat that the thermit that is designed burning is discharged is more, and the metal flow temperature of product can reach more than 3000 ℃, and sufficient combustion, and speed is even, can realize smooth combustion.Because the introducing of thermal conduction agent Red copper oxide strengthens and has improved HU.Burning back residue particles size is less, and the priming mixture ignition temperature that is designed is higher, can the thermit of reliable ignition burning-point about 600 ℃.Through the introducing of thermal conduction agent Red copper oxide, the heat that thermit burning is produced is delivered to greatest extent and is cut on the metal target pipe, has improved Btu utilization efficient.Simultaneously since the thermit and priming mixture self heatproof that are designed can reach more than 300 ℃, in stable condition at normal temperatures, use as safe as a house, convenient transportation.
Description of drawings
Fig. 1 is the loaded constitution sectional view that is used for non-explosivity metal tube annular cutting unit of the present invention.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is a specific embodiment of the present invention, provides powder charge of the present invention to be applied to the structural representation of non-explosivity metal tube annular cutting unit.
Label among the figure is represented respectively: 1, sealed paper; 2, priming mixture; 3, thermit.4, tightness system; 5, ignition element; 6, top connection; 7, charging room; 8, refractory layer; 9, thermit charge unit; 10, fluid distributes director; 11, diverter; 12, sealing sliding sleeve.
The embodiment that provides below in conjunction with accompanying drawing and contriver does further detailed description to the present invention.
Embodiment
The charge unit that is used for non-explosivity metal tube annular cutting unit of the present invention is made up of thermit and priming mixture.Thermit is made up of following raw materials by weight: high-energy combustion agent: 70%~90%, and gas generating agent: 5%~25%, trace mineral supplement 1%~10%, the per-cent sum of above-mentioned raw materials is 100%; Priming mixture is pressed (2~4) by aluminium-magnesium alloy powder and cupric oxide: the weight ratio assembly of (4~6).
High-energy combustion agent selects for use red oxide of iron, aluminium powder, cupric oxide, Red copper oxide, nickel powder to form, and its weight proportion is: red oxide of iron: aluminium powder: cupric oxide: Red copper oxide: nickel powder=4: (1~2): (3~4): (0~1): (1~2).
Aluminium in the high-performance incendiary material and red oxide of iron, cupric oxide reaction at a certain temperature, the reaction of aluminium powder and nickel powder forms a kind of aluminium nickel compound under the high temperature action of reaction, discharges great amount of heat simultaneously.
2Al+Fe
2O
3→2Fe+Al
2O
3+Q
2Al+3CuO→3Cu+Al
2O
3+Q
AL+Ni→NiAL+Q
The heat that above-mentioned three reactions are discharged will be far longer than the heat that single thermite discharges, thereby temperature of combustion is significantly improved.The fluid temperature (F.T.) that its reaction generates generally can reach more than 3000 ℃.
Simultaneously, Red copper oxide absorption heat is vaporized rapidly under action of high temperature, under the highly compressed effect, is sprayed when touching target compound; Red copper oxide is crystallization rapidly; Release of heat is cut on the metal tube thereby cause entrained heat to be transmitted to greatest extent, thereby has been improved HU.In addition, the present invention is mated through rational granularity, the inner partial temperature difference of balance high-performance incendiary material, thus make the combustion reactions of high-performance incendiary material steady, deflagration phenomenon does not take place, and the combustionresidue particle size is controlled.The effect of Red copper oxide in prescription is to serve as a kind of thermal conducting agent, so that the smooth combustion of high-performance incendiary material.
Gas generating agent in the above-mentioned thermit is processed by the mixture of a kind of of SiC, polyoxyethylene glycol or two kinds.Polyoxyethylene glycol at high temperature reacts with oxygen, emits water vapour and carbonic acid gas.
HO-(CH
2CH
2O)
n+O
2→H
2O+CO
2
Its product carbonic acid gas and water do not pollute surrounding environment.
Above-mentioned priming mixture mainly is made up of cupric oxide and magnesium aluminum-alloy powder; Weight ratio between each composition is a magnesium aluminum-alloy powder: cupric oxide (2~4): (4~6); This priming mixture heatproof can reach more than 300 ℃, and can be smoothly, the material of about 600 ℃ at reliable ignition point of ignition.
The thermit working method is: at first each composition with high-energy combustion agent, gas generating agent and trace mineral supplement sieves;
High-energy combustion agent is selected red oxide of iron, aluminium powder, nickel powder, cupric oxide, Red copper oxide;
Gas generating agent is selected the mixture of wherein a kind of of SiC, polyoxyethylene glycol or two kinds.
Wherein a kind of of additive selective oxidation calcium, silicon-dioxide, Calcium Fluoride (Fluorspan) or more than one mixture.
Earlier the raw material of high-energy combustion agent being put into the V-type mixer then mixed 2 hours; Guarantee the blended homogeneity, add gas generating agent and additive, then an amount of polyglycol solution is poured in the mixture of high-energy combustion agent, gas generating agent and additive; In the V-type mixer, mixed one hour again; The said mixture mould of packing into, the column that the center that is pressed into is with holes, pillar densities remains on 3.8g/cm
3~4.5g/cm
3
The production technique of above-mentioned priming mixture does, aluminium-magnesium alloy powder and cupric oxide mixed pour in the V-type mixer, mixes 2 hours.
With in the priming mixture centre hole of pouring the thermit powder column in bulk, two ends promptly can be made into charge unit with the sealed adhesive paper sealing at last.
The embodiment that following contriver provides need to prove, this embodiment is used for further understanding the present invention, the invention is not restricted to this embodiment.
Preparation embodiment 1:
Referring to Fig. 1; At first with red oxide of iron: 400g, aluminium powder: 200g, cupric oxide: 300g, Red copper oxide: 100g, nickel powder: 100g, polyoxyethylene glycol: 350g, quicklime: 50g puts into the V-type mixer and mixed 2 hours, and the granularity of cupric oxide, red oxide of iron, Red copper oxide is greater than the granularity of nickel powder, aluminium powder.Give the polyoxyethylene glycol that adds 50g in the mixture then, put into the V-type mixer and mixed 1 hour, take out mixture then and be pressed into center as shown in Figure 1 column form object with holes 3 (thermit powder column) with particular manufacturing craft, the density of its column form object 3 is 3.8~4.5g/cm
3As shown in Figure 2, the shape of cross section of thermit powder column endoporus is rounded, moves back mould when this helps press-fiting.
Then with aluminium-magnesium alloy powder: 600g, cupric oxide: 400g puts into the V-type mixer and mixed 2 hours, and priming mixture completes, and takes out for use.
At last in the centre hole with priming mixture 2 injection thermit charge poles 3 in bulk, till filling with.And with sealed adhesive paper 1 with the centre hole sealed at both ends.Like this, a charge unit completes.
Preparation embodiment 2:
Referring to Fig. 1; At first with red oxide of iron: 400g, aluminium powder: 100g, cupric oxide: 400g, nickel powder 200g, SiC:300g, Calcium Fluoride (Fluorspan) 100g put into the V-type mixer and mixed 2 hours; Wherein, the granularity of cupric oxide, red oxide of iron is greater than the granularity of nickel powder, aluminium powder.Give the polyoxyethylene glycol that adds 50g in the mixture then, put into the V-type mixer and mixed 1 hour, take out mixture then and be pressed into center as shown in Figure 1 column form object with holes 3 (thermit powder column) with particular manufacturing craft, its column form object density is 3.8~4.5g/cm
3As shown in Figure 2, the shape of cross section of thermit powder column endoporus is rounded, moves back mould when this helps press-fiting.
Then aluminium-magnesium alloy powder 600g, cupric oxide 300g are put into the V-type mixer and mixed 2 hours, priming mixture completes, and takes out for use.
At last in the centre hole with priming mixture 2 injection thermit powder charge columns in bulk, till filling with.And with sealed adhesive paper 1 with the centre hole sealed at both ends.Like this, a charge unit completes.
Preparation embodiment 3:
Referring to Fig. 1; At first with red oxide of iron: 400g, aluminium powder: 100g, cupric oxide: 300g, Red copper oxide: 100g, nickel powder: 200g, SiC:150g, polyoxyethylene glycol: 150g, silica 1 00g put into the V-type mixer and mixed 2 hours, and the granularity of cupric oxide, red oxide of iron, Red copper oxide is greater than the granularity of nickel powder, aluminium powder.Give the polyoxyethylene glycol that adds 50g in the mixture then, put into the V-type mixer and mixed 1 hour, take out mixture then and be pressed into center as shown in Figure 1 column form object with holes 3 (thermit powder column) with particular manufacturing craft, the density of its column form object 3 is 3.8~4.5g/cm
3As shown in Figure 2, the shape of cross section of thermit powder column endoporus is rounded, moves back mould when this helps press-fiting.
Then aluminium-magnesium alloy powder 600g, cupric oxide 400g are put into the V-type mixer and mixed 2 hours, priming mixture completes, and takes out for use.
At last in the centre hole with priming mixture 2 injection thermit powder charge columns in bulk, till filling with.And with sealed adhesive paper 1 with the centre hole sealed at both ends.Like this, a charge unit completes.
As shown in Figure 3, the thermit charge unit 9 of some amount to be packed in the charging room 7, top connection 6 links with tightness system 4; Seed element 5 is housed in the tightness system; Priming mixture 2 in the thermit charge unit 9 of igniting after seed element 5 is got angry is lighted thermit powder column 3 by combustion priming mixture 2, and the HTHP metal fluid that 3 burnings of thermit powder column produce distributes director 10 directions to flow along the device axial direction due to fluid; After high temperature fluid distributes director 10 through fluid; Turn to through diverter 11, its heading smoothly change into perpendicular to assembly axis to radial direction, form cyclic high temperature and high speed fluid cutter.Under pressure simultaneously, sealing sliding sleeve 12 slides to the device afterbody, opens cutting channel.High temperature and high speed fluid cutter affacts on the same interior annular surface of being cut metal tube, thereby implements cutting operation.Usually the cutting operation process is accomplished within 180ms, and cutting speed in feet per minute is very fast.
In the above-mentioned high-energy combustion agent prescription, cupric oxide, red oxide of iron serve as the role of oxygenant, and aluminium powder and nickel powder serve as the role of reductive agent; When granularity was selected, the granularity of oxygenant was greater than the granularity of reductive agent, and promptly the granularity of cupric oxide, red oxide of iron is greater than aluminium powder and nickel powder granularity; Like this, the reductive agent of small grain size that guaranteed in the formula system in the big grain oxygenant slit filling is when making thermopositive reaction; Make redox reaction fully, steadily, thereby guarantee the smooth combustion of thermit.
Above-mentioned priming mixture places in the centre hole of thermit, and during actual the use, the thermit charge unit 9 in the cutting unit is some amount often; As shown in Figure 3; Seed element 5 has been lighted the priming mixture 2 in the thermit charge unit 9 of the superiors, all realizes from centerfire for making all the thermit charge unit 9 in the cutting unit, requires priming mixture 2 to have higher speed of ignition; The experiment proof; When the granularity of composition aluminium-magnesium alloy powder and cupric oxide in priming mixture 2 prescription less than less than 10 μ m the time, its speed of ignition can guarantee that all the thermit charge unit 9 in the cutting unit can realize fast lighting thermit powder column 3 from centerfire; Thereby guarantee that the hot metal fluid that 3 burnings of thermit powder column produce distributes director 10 to flow to fluid, thereby guarantee normally the carrying out of cutting operation of cutting unit.
Claims (5)
1. charge unit that is used for non-explosivity metal tube annular cutting unit, this charge unit that makes is made up of thermit and priming mixture, it is characterized in that:
Described thermit is made up of following raw materials by weight: high-energy combustion agent: 70%~90%, and gas generating agent: 5%~20%, trace mineral supplement 1%~10%, the per-cent sum of above-mentioned raw materials is 100%;
Described high-energy combustion agent selects for use red oxide of iron, aluminium powder, cupric oxide, Red copper oxide, nickel powder to form, and its weight proportion is: red oxide of iron: aluminium powder: cupric oxide: Red copper oxide: nickel powder=4: (1~2): (3~4): (0~1): (1~2);
Described priming mixture is pressed (2~4) by aluminium-magnesium alloy powder and cupric oxide: the weight ratio assembly of (4~6);
Described gas generating agent is the mixture of wherein a kind of of SiC, polyoxyethylene glycol or two kinds;
Described trace mineral supplement is wherein a kind of of quicklime, silicon-dioxide, Calcium Fluoride (Fluorspan) or more than one mixture.
2. the charge unit that is used for non-explosivity metal tube annular cutting unit as claimed in claim 1 is characterized in that the granularity of described cupric oxide, red oxide of iron, Red copper oxide is greater than the granularity of nickel powder, aluminium powder.
3. the charge unit that is used for non-explosivity metal tube annular cutting unit as claimed in claim 1 is characterized in that the magnalium mass ratio in the described aluminium-magnesium alloy powder is 1: 1.
4. the charge unit that is used for non-explosivity metal tube annular cutting unit as claimed in claim 1 is characterized in that the cupric oxide in the said priming mixture and the granularity of aluminium-magnesium alloy powder are less than 10 μ m.
5. the described preparation method who is used for the charge unit of non-explosivity metal tube annular cutting unit of claim 1 is characterized in that the prescription of at first pressing thermit is with high-energy combustion agent, gas generating agent, the full and uniform mixing of trace mineral supplement; Adding an amount of polyoxyethylene glycol then continues to mix; The mixture mould weight of packing into, process column at last, press the full and uniform mixing of prescription of priming mixture then with centre hole; In the centre hole of going into column in bulk, use sealed paper center seal hole at last.
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CN108827093B (en) * | 2018-06-28 | 2020-11-24 | 中国人民解放军陆军工程大学 | High-energy combustion test device for underwater cutting and crushing research |
CN110256182A (en) * | 2019-04-29 | 2019-09-20 | 广州卫富科技开发有限公司 | Composite incendiary agents and preparation method thereof |
CN111484383A (en) * | 2020-03-24 | 2020-08-04 | 北方斯伦贝谢油田技术(西安)有限公司 | Thermal energy trigger and preparation method thereof |
CN112299934A (en) * | 2020-11-06 | 2021-02-02 | 湖北航天化学技术研究所 | Thermite for destroying cased ammunition and preparation method thereof |
CN112851452B (en) * | 2021-03-09 | 2022-03-22 | 河南中南工业有限责任公司 | Pyrotechnic composition for pyrotechnic cutting device and manufacturing method and application thereof |
CN114736084A (en) * | 2022-03-09 | 2022-07-12 | 江西星火军工工业有限公司 | Stable and efficient novel combustion agent and preparation method thereof |
CN116425602A (en) * | 2023-04-03 | 2023-07-14 | 西安卡亚石油能源有限公司 | High-energy combustion agent and preparation method thereof |
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US4352397A (en) * | 1980-10-03 | 1982-10-05 | Jet Research Center, Inc. | Methods, apparatus and pyrotechnic compositions for severing conduits |
CN1284750C (en) * | 2003-11-15 | 2006-11-15 | 台州盛世环境工程有限公司 | Pyrotechnic composition for thermal pipe cutter and process for making same |
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US4352397A (en) * | 1980-10-03 | 1982-10-05 | Jet Research Center, Inc. | Methods, apparatus and pyrotechnic compositions for severing conduits |
CN1284750C (en) * | 2003-11-15 | 2006-11-15 | 台州盛世环境工程有限公司 | Pyrotechnic composition for thermal pipe cutter and process for making same |
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