CN102350239B - Negative pressure controllable fracturing fluid mixer and fracturing fluid preparation system - Google Patents
Negative pressure controllable fracturing fluid mixer and fracturing fluid preparation system Download PDFInfo
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- CN102350239B CN102350239B CN 201110206964 CN201110206964A CN102350239B CN 102350239 B CN102350239 B CN 102350239B CN 201110206964 CN201110206964 CN 201110206964 CN 201110206964 A CN201110206964 A CN 201110206964A CN 102350239 B CN102350239 B CN 102350239B
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Abstract
The invention relates to a negative pressure controllable fracturing fluid mixer and fracturing fluid preparation system, characterized in that: the system comprises a solid additive system, a gas-powder mixing system, and a liquid addition negative suction system; wherein, the solid additive system comprises a funnel, the lower portion of the funnel is successively connected with a tee joint, a globe valve, a threaded joint, a first tee joint and a main magic T; one end of the main magic T is connected with a first union through a high pressure joint, and the other end of the main magic T is connected with a second union through a low pressure joint; the inner bore of one end of the high pressure joint approaching to the main magic T is connected with a nozzle, and the inner bore of one end of the low pressure joint approaching to the main magic T is connected with a mixing pipe; the gas-powder mixing system comprises a gas-powder tee joint, wherein, one end of the gas-powder tee joint is connected with the tee joint, and the other end of the gas-powder tee joint is connected with a first needle valve, and an air inlet pipe is connected with the first needle valve and then arranged in the gas-powder tee joint; and the lower portion of the gas-powder tee joint is successively connected with a transparent flexible pipe, a check valve and a powder stop valve. According to the invention, the defects existing in the prior art are overcome.
Description
Technical field
The present invention relates to controlled fracturing fluid blender of a kind of negative pressure and fracturing fluid compounding system.
Background technology
In the exploitation completion practice of petroleum industry, for landlocked oil gas field, majority will carry out the pressing crack construction operation, after oil-gas Layer is transformed, just can reach commercial hydrocarbon flow exploitation.The pressing crack construction operation must be prepared the huge fracturing fluid of quantity at the scene, just can carry out the pressing crack construction operation.Each required fracturing fluid quantity, from 100-1000 in many ways quantity do not wait, of the fracturing fluid demand is very big.And whether the concentration of fracturing fluid preparation is even, can reach the requirement of initial viscosity, directly have influence on pressing crack construction take grittiness can and anti-filtration capacity and anti-shear ability, degree of hydration etc., therefore, the quality of fracturing fluid preparation is related to the success or failure and the construction quality of pressing crack construction.
Now mainly there is following problem with of the fracturing fluid preparation:
1. adopt artificial mode to pour what and speed of chemical industry material in funnel, control the size and the adding speed of addition, its mixing is inhomogeneous, is prone to caking phenomenon, is commonly called as flake, swims in the top, has had a strong impact on the concentration of base fluid; Be deposited in big jar bottom after the construction again, caused the fracturing fluid of preparing once more putrid and deteriorated easily, brought very big difficulty for cleaning fluid reservoir 38.
Of the fracturing fluid Main Ingredients and Appearance is a water, mainly prepares a difficult problem and will solve water contacts the back generation with thickening agent (dry powder shape) agglomeration problems exactly.Present compound method, employing is poured dry powder (guanidine glue) in the mixing hopper into, allow in the water that its flow nozzle high speed flows, after not filling decentralized dry powder and water contacting, formed caking phenomenon, although both mix high-speed motion has been carried out in the back in discharge pipe stirring, but still have a large amount of powder-materials not broken up, form the be responsible for a task until it is completed fish-eye shaped mixture of powder of glue, can not dissolve in the water viscosity of multiviscosisty base fluid.
2. when solid additive such as potassium chloride have caking phenomenon, easily be stuck under the exit of funnel and do not go, dosing can't be carried out.
The solid additive of preparing in the fracturing fluid, what it was commonly used is potassium chloride, is the graininess crystal, when being subjected to being prone to caking phenomenon after the airborne moisture content humidity.Often in process for preparation, easily be stuck in funnel exit, stopped up exit passageway, handle, can interrupt of the fracturing fluid preparing process; After entering the controlled fracturing fluid blender of negative pressure less than the block potassium chloride of outlet diameter, short with swiftly flowing liquid incorporation time, solubilizing poorly, the bottom that most bulk or graininess potassium chloride have sunk to fluid reservoir 38, can not be dissolved in the middle of the fracturing fluid, influence the preparation quality of liquid.
3. the dosing hopper outlet adopts flexible rubber hose, and under the state that liquid at high speed flows, pipeline is inhaled partially, make the area of passage of pipeline seriously dwindle, not smooth, the phenomenon of dosing plugging line very easily appears, cause the dosing Halfway Stopping, bad phenomenon such as thickening agent caking take place.
When in flexible pipe, quick flowing liquid being arranged, can cause the pressure in the pipeline to be lower than atmospheric pressure on every side, atmospheric pressure can be pressed flexible pipe partially the handling capacity of seriously blocking mixture in the flexible pipe; When the pulvis amount that adds was big, guanidine glue was with after liquid contacts, and the jelly of formation can block the discharge pipe flexible pipe, plugging line phenomenon occurs.In case after blocking, remove the cement in the pipeline, be very difficult thing, even can cause the dosing flexible pipe to scrap.
4. liquid additive adopts the method for manually pouring into to add, and its pouring volume can't be precisely controlled, easily entrained air, additive is mixed with air produce a large amount of foams, 38 excessive jars of fluid reservoirs can not circulate again, cause the fracturing fluid circulation of preparation inhomogeneous.
Contain frother in the liquid additive, when this additive being poured into when mixing in the funnel, having air sneaks into wherein, again with after water mixes, can in fluid reservoir 38, produce a large amount of foams, and fracturing fluid is discharged outside the fluid reservoir 38, cause preparing process to end, can not carry out big discharge capacity circulation again, so that density unevenness is even about the fracturing fluid of being prepared.
5. because of fluid reservoir 38 liquid levels are higher than the dosing funnel, can cause after the termination of pumping that fracturing fluid in the fluid reservoir 38 flows backwards back in the funnel, forms piece with the dry powder in the funnel, and can not use again.
The position that is higher than the controlled fracturing fluid blender of negative pressure of obtaining liq because of the position of fluid reservoir 38, after stopping dosing, liquid in the controlled fracturing fluid mixer outlet of the negative pressure pipeline can return out from the controlled fracturing fluid blender of negative pressure, cause the dry powder in the controlled fracturing fluid blender of the negative pressure funnel to contact with liquid, form jelly, be difficult to it is mixed with liquid again, cause the loss of glue guanidine.
6. prepare every jar of the fracturing fluid for up to 30 minutes, the preparation time is long, delays its follow-up pressing crack construction.
7. the discharge capacity of preparing fracturing fluid and pressure are low, have only the discharge capacity of 200-300L/min, and the ejection pressure of nozzle can not reach the technological requirement that fully circulates while preparing less than 4MPa, also need fully circulation after the preparation again, have prolonged the dosing time.
Summary of the invention
The technical problem to be solved in the present invention provides controlled fracturing fluid blender of a kind of negative pressure and fracturing fluid compounding system, to overcome the defective that exists in the prior art.
Technical scheme of the present invention is: the controlled fracturing fluid blender of a kind of negative pressure is characterized in that: comprise that solid additive system, gas powder hybrid system and liquid add the negative pressure intake system; Described solid additive system comprises funnel, and the funnel bottom is connected with threeway, globe valve, nipple joint, first threeway in turn and mainly mixes threeway; Main threeway one end that mixes links to each other with first union by the high pressure pipe nipple, and the other end links to each other with second union by the low pressure pipe nipple; The high pressure pipe nipple is connected with jet pipe near a main end endoporus that mixes threeway, and the low pressure pipe nipple is inlaid with the mixing trunnion near a main end endoporus that mixes threeway; Described gas powder hybrid system comprises the gas powder mixing tee that an end links to each other with threeway, and the gas powder mixing tee other end connects first needle-valve, air inlet pipe and the inside that is installed in gas powder mixing tee after first needle-valve is connected; Gas powder mixing tee bottom is connected with transparent hose, ball-and-seat and the dry powder stop valve of band steel wire in turn; Described liquid adds the negative pressure intake system and comprises second threeway that is connected with dry powder stop valve bottom, a termination first threeway of second threeway, and the other end taps into the liquid flexible pipe by the liquid additive stop valve; Described high pressure pipe nipple upper end is connected with second needle-valve in turn, is provided with the high-pressure hose and the elbow bend of high-pressure ball valve, elbow bend links to each other with little four-way on being fixed on funnel, be evenly equipped with four nozzles on the funnel, the outlet of little four-way one end is connected with a nozzle, its excess-three nozzle all is fixed on the funnel by mini three links, is connected by the high pressure nozzle tube connector between little four-way and the mini three links.
Described globe valve internal diameter is 2 inches, and the nipple joint internal diameter is 2 inches, and little four-way internal diameter is
3/
8Inch, nozzle diameter is 1mm, high pressure nozzle tube connector internal diameter is
3/
8Inch; Described nipple joint is that 2 inches movable joint links to each other with first threeway by internal diameter; The mixed threeway of described master is that 2 inches tube connector is connected with the low pressure pipe nipple by internal diameter; Internal diameter of described high pressure pipe nipple upper end weldering is
1/
2The pipe nipple of inch connects second needle-valve again, by an internal diameter is again
1/
2The inch steel pipe connects high-pressure ball valve, by an internal diameter is again
1/
2The high-pressure hose of inch connects internal diameter
1/
2The elbow bend of inch; The joint of hangnail structure, the transparent hose of connecting band steel wire are adopted in described gas powder mixing tee bottom; The top of described funnel is provided with cover plate, enters in the funnel to prevent foreign matter.
Described solid additive system, gas powder hybrid system and liquid add the negative pressure intake system and are fixed on the framework, are convenient to install and use and carry.
Described high pressure pipe nipple and low pressure pipe nipple are pressed on the framework by the anti-rotation backing plate respectively, and by the U-shaped clamp) be fixed on the framework.
The fracturing fluid compounding system of the controlled fracturing fluid blender of a kind of negative pressure is characterized in that: comprise that high pressure dosing three cylinder pump, dosing high pressure line, band steel wire are difficult for inhaling inclined to one side flexible pipe and fluid reservoir; Wherein, the suction side of high pressure dosing three cylinder pump links to each other with fluid reservoir, the outlet of high pressure dosing three cylinder pump is connected by the jet pipe in the controlled fracturing fluid blender of dosing high pressure line and negative pressure, mixing trunnion in the controlled fracturing fluid blender of negative pressure is difficult for inhaling the top that inclined to one side flexible pipe is connected to fluid reservoir by the band steel wire, forms a circulation line.
It is 2 inches of internal diameters that described band steel wire is difficult for inhaling inclined to one side flexible pipe, and the tube wall interlayer has the flexible pipe of steel wire.
Technique effect of the present invention is:
1. the preparation speed of dry powder can reach 25Kg/min, and preparing 30 side's liquid required times is 10-12 minute.
2. the preparation time is original 1/3, and the preparation mass ratio improved originally, after preparation is finished, can directly carry out pressing crack construction, did not need to carry out the molten swollen of several hrs.
3. will take the pressing crack construction that carried out in two days originally, can in one day same day, finish, improve working efficiency greatly.
4. solve the flake problem that easily forms in your the glue preparing fracturing fluid process of guanidine, improved the preparation quality, shortened the preparation time.
5. when having solved solid additive such as potassium chloride caking phenomenon being arranged, easily be stuck under the exit of funnel and do not go the problem that dosing can't be prepared.
6. solve dosing hopper outlet pipeline and adopted the flexible pipe of being with steel wire, prevented that pipeline from being inhaled partially, formed the problem of blocking pipeline.
7. adopt airtight dosing technology to prevent that air from entering in the middle of the obtaining liq, the excessive jar phenomenon of the foaming that causes.
8. adopt the ball-and-seat technology, prevented that fracturing fluid is back among the dosing funnel, cause the phenomenon of guanidine rubber powder caking waste.
9. adopt big discharge capacity preparing process technology, improved the kinetic energy of liquid, accelerated the circulation rate of liquid in fluid reservoir 38, improved the uniformity of compound concentration.
Description of drawings
The present invention will be further described below in conjunction with the embodiment accompanying drawing:
Fig. 1 is a structural representation of the present invention;
Fig. 2 is the controlled fracturing fluid mixer structure of a gas powder negative pressure schematic diagram;
Fig. 3 is the controlled fracturing fluid mixer structure of a total negative pressure schematic diagram;
Fig. 4 is a fracturing fluid compounding system connection diagram.
Reference numeral is as follows:
1. cover plate, 2. funnel, 3. nozzle, 4. gas powder mixing tee, 5. air intake control valve, 6. be with the transparent hose of steel wire, 7. ball-and-seat, 8. dry powder stop valve, 9. liquid additive stop valve, 10. feed liquor flexible pipe, 11. second union, 12. anti-rotation backing plate, 13.U shape clamp, 14. mixing trunnion, 15. tube connector, 16. jet pipe, 17. main mixed threeway, 18. first union, 19. second needle-valve, 20. movable joint, 21. framework, 22. nipple joint, 23. globe valve, 24. high-pressure ball valve, 25. high-pressure hose, 26. high pressure nozzle tube connector, 27. first threeway, 28. second threeway, 29. first needle-valve, 30. low pressure pipe nipple, 31. two male joints, 32. high pressure pipe nipple, 33. threeway, 34. high pressure dosing three cylinder pump, 35. dosing high pressure line, 36. the controlled fracturing fluid blender of negative pressure, 37. the band steel wire is difficult for inhaling inclined to one side flexible pipe, 38. fluid reservoir, 39. elbow bend, 40. little four-way, 41. mini three links, 45. air inlet pipe.
The specific embodiment
The invention belongs to oil and gas industry, the technology that relates to the fracturing fluid preparation, in order to make thickening agent, solid adds Ji, and liquid additive can be better, and is faster, mix with construction liquid more equably, caking phenomenon does not take place, and improves construction quality, and the controlled fracturing fluid blender of negative pressure of a kind of preparing fracturing fluid body of invention.
Structure of the present invention is as follows:
The controlled fracturing fluid blender of a kind of negative pressure comprises that solid additive system, gas powder hybrid system and liquid add the negative pressure intake system;
Described solid additive system comprises funnel 2, and funnel 2 bottoms are connected with threeway 33, globe valve 23, nipple joint 22, first threeway 27 in turn and mainly mix threeway 17; Main threeway 17 1 ends that mix link to each other with first union 18 by high pressure pipe nipple 32, and the other end links to each other with second union 11 by low pressure pipe nipple 30; High pressure pipe nipple 32 is connected with jet pipe 16 near a main end endoporus that mixes threeway 17, and low pressure pipe nipple 30 is inlaid with near a main end endoporus that mixes threeway 17 and mixes trunnion 14;
Described gas powder hybrid system comprises the gas powder mixing tee 4 that an end links to each other with threeway 33, and gas powder mixing tee 4 other ends connect first needle-valve 29, air inlet pipe 45 and the inside that is installed in gas powder mixing tee 4 after first needle-valve 29 is connected; Gas powder mixing tee 4 bottoms are connected with transparent hose 6, ball-and-seat 7 and the dry powder stop valve 8 of band steel wire in turn;
Described liquid adds a termination first threeway 27 that the negative pressure intake system comprises second threeway, 28, the second threeways 28 that are connected with dry powder stop valve 8 bottoms, and the other end taps into liquid flexible pipe 10 by liquid additive stop valve 9;
Described high pressure pipe nipple 32 upper ends are connected with second needle-valve 19 in turn, are provided with the high-pressure hose 25 and the elbow bend 39 of high-pressure ball valve 24, elbow bend 39 links to each other with little four-way 40 on being fixed on funnel 2, be evenly equipped with four nozzles 3 on the funnel 2, the outlet of little four-way 40 1 ends is connected with a nozzle 3, its excess-three nozzle 3 all is fixed on the funnel 2 by mini three links 41, is connected by high pressure nozzle tube connector 26 between little four-way 40 and the mini three links 41.
Above-mentioned globe valve 23 internal diameters can be 2 inches, and nipple joint 22 internal diameters are 2 inches, and little four-way 40 internal diameters are
3/
8Inch, nozzle 3 diameters are 1mm, high pressure nozzle tube connector 26 internal diameters are
3/
8Inch; Described nipple joint 22 is that 2 inches movable joint 20 links to each other with first threeway 27 by internal diameter; The mixed threeway 17 of described master is that 2 inches tube connector 15 is connected with low pressure pipe nipple 30 by internal diameter; Described high pressure pipe nipple 32 upper ends internal diameter of weldering is
1/
2The pipe nipple of inch connects second needle-valve 19 again, by an internal diameter is again
1/
2The inch steel pipe connects high-pressure ball valve 24, by an internal diameter is again
1/
2The high-pressure hose 25 of inch connects internal diameter and is
1/
2The elbow bend 39 of inch; The joint of hangnail structure, the transparent hose 6 of connecting band steel wire are adopted in described gas powder mixing tee 4 bottoms; The top of described funnel 2 is provided with cover plate 1, enters in the funnel 2 to prevent foreign matter.
Above-mentioned solid additive system, gas powder hybrid system and liquid add the negative pressure intake system and can be fixed on the framework 21, are convenient to install and use and carry.
Above-mentioned high pressure pipe nipple 32 and low pressure pipe nipple 30 also can be pressed on the framework 21 by anti-rotation backing plate 12 respectively, and are fixed on the framework 21 by U-shaped clamp 13.Promptly utilize the plane, spiral shell side of the pipe Surface Machining of high pressure pipe nipple 32 and low pressure pipe nipple 30, be pressed on the anti-rotation backing plate 12, anti-rotation backing plate 12 is pressed on the plane of framework 21 again, be fixed on the framework 21 by two U-shaped clamps 13, prevent from the process of its dismounting union, to cause the associated junction of high pressure pipe nipple 32 and low pressure pipe nipple 30 to release, cause the generation of unsafe factor.
A kind of fracturing fluid compounding system that comprises the controlled fracturing fluid blender of above-mentioned negative pressure comprises that also high pressure dosing three cylinder pump 34, dosing high pressure line 35, band steel wire are difficult for inhaling inclined to one side flexible pipe 37 and fluid reservoir 38; Wherein, the suction side of high pressure dosing three cylinder pump 34 links to each other with fluid reservoir 38, the outlet of high pressure dosing three cylinder pump 34 is connected by the jet pipe 16 in the controlled fracturing fluid blender of dosing high pressure line 35 and negative pressure, mixing trunnion 14 in the controlled fracturing fluid blender of negative pressure is difficult for inhaling the top that inclined to one side flexible pipe 37 is connected to fluid reservoir 38 by the band steel wire, forms a circulation line.
Above-mentioned band steel wire is difficult for inhaling inclined to one side flexible pipe 37 and can be 2 inches of internal diameters, and the tube wall interlayer has the flexible pipe of steel wire.
As shown in Figure 1, funnel 2 is the funnels that become by welding processing by a cylinder and bullet, and the diameter of cylindrical shell is 40cm, and the diameter of its underpart outlet is 2 inches; Threeway 33 lower ends of funnel 2 bottoms are 2 inches globe valve 23 with internal diameter of screwed connection, globe valve 23 bottoms connect 2 inches nipple joints 22, nipple joint 22 bottoms connect first threeway 27 by 2 inches movable joints 20,2 inches joints of first threeway 27 connect the main threeway 17 that mixes, the main left end screwed connection high pressure pipe nipple 32 that mixes threeway 17, the other end screwed connection union (mother) 18 of high pressure pipe nipple 32, the main right-hand member that mixes threeway 17 can be 2 inches tube connector 15 connection low pressure pipe nipples 30 by internal diameter, the right-hand member screwed connection union (public affairs) 11 of low pressure pipe nipple 30; Screwed connection jet pipe 16 in the high pressure pipe nipple 32 right-hand member endoporus; The left end endoporus of low pressure pipe nipple 30 is inlayed and is mixed trunnion 14.Above connected and composed main component of the present invention.It is mainly used in negative pressure and sucks solid additive such as potassium chloride, is the system of subject of solid additive.
Internal diameter of upper right side weldering at high pressure pipe nipple 32 is
1/
2The pipe nipple of inch connects second needle-valve 19 again, by an internal diameter is again
1/
2The inch steel pipe connects high-pressure ball valve 24, by an internal diameter is again
1/
2The high-pressure hose 25 of inch connects internal diameter and is
1/
2The elbow bend 39 of inch connects an internal diameter again and is
3/
8The little four-way 40 of inch, little four-way 40 is fixed on the conical upper of funnel 2 by the nut on it, the outlet of the little four-way one end nozzle 3 that is threaded; The nozzle 3 that to be evenly distributed with four diameters on the conical surface of funnel 2 conical upper be 1mm, its excess-three nozzle 3 all adopts mini three links to be fixed on the funnel 2, adopts internal diameter to be between little four-way 40 and the adjacent mini three links 41
3/
8The high pressure nozzle tube connector 26 of inch connects.
The structure of the controlled fracturing fluid blender of gas powder negative pressure is as follows among the present invention:
An internal diameter is 1
1/
2The left end of inch gas powder mixing tee 4 is by being threaded in threeway 33 left ends, its right-hand member connects first needle-valve 29, first needle-valve 29 adopts screwed connection with air inlet pipe 45 external diameters, is installed in the inside of gas powder mixing tee 4, and air inlet pipe 45 length are advisable to put in threeway 33 inside; The joint of hangnail structure is adopted in gas powder mixing tee 4 bottoms, is connected with a transparent hose 6 that steel wire is arranged, and its underpart connects a ball-and-seat 7 again, dry powder stop valve 8 of the bottom screwed connection of ball-and-seat 7; Forming a gas powder hybrid system by above-mentioned parts, is the major technique component part of this blender, disperses to mix with liquid in order to the air-flow that solves pulvis.
The left end that dry powder stop valve 8 bottoms connect second threeway, 28, the second threeways 28 connects first threeway 27, and another termination liquid additive stop valve 9 taps into liquid flexible pipe 10 again on stop valve 9, forms liquid and adds the negative pressure intake system.
More than three systems (being that solid additive system, gas powder hybrid system, liquid add the negative pressure intake system) integral installation be fixed on the framework 21(50X50X3 rectangular steel tube of a cubic bodily form) on, be convenient to install and use and carry; Cover plate 1 is installed in the top of funnel 2, plays to prevent that foreign matter from entering the effect of funnel 2.
Job step of the present invention is as follows:
The suction side of high pressure dosing three cylinder pump 34 is linked to each other with fluid reservoir 38, the outlet of high pressure dosing three cylinder pump 34 is connected with inlet of the present invention by dosing high pressure line 35, outlet of the present invention is 2 inches by an internal diameter, and the tube wall interlayer has the flexible pipe of steel wire, promptly be difficult for inhaling the top that inclined to one side flexible pipe 37 is connected fluid reservoir 38, form a circulation line with steel wire.The discharge capacity of operate high pressure dosing three cylinder pump 34 reaches 500-700 liters, and the pressure demonstration of high pressure dosing three cylinder pump 34 reaches 5-7MPa.
1. the mixing of dry powder additive
Close 2 inches ball valves 23, dry powder stop valve 8, air intake control valve 5 and liquid additive stop valve 9, dry powder is joined in the funnel 2 till fill it up with, slowly open dry powder stop valve 8 and air intake control valve 5, observe the flow velocity of powder outlet quantity by the transparent hose 6 of band steel wire, till powder delivery became dust, dry powder adding speed was controlled at 25Kg/min and is advisable.Dry powder will flow into the main threeway 17 that mixes downwards under the drive of negative-pressure air-flow, mix with the high velocity liquid stream that flows out in the jet pipe 16, be discharged in the fluid reservoir 38.
When dry powder additive mixed process midway, if the plugging line takes place or dosing is ended, because of the position height of outlet line, when causing liquid to flow backwards, ball-and-seat 7 is closed automatically, prevents from that the liquid that flows backwards back and the dry powder in the funnel 2 from connecing to separate, and forms glued powder.After pipeline stops up, stop dosing, behind the obstruction in the removing discharge pipe 37, proceed the dosing operation again.
After the powder in the funnel 2 adds, again funnel 2 is filled it up with dry powder, till one big jar of required dry mash of liquid of preparation adds.
2. the mixing of liquid additive
Earlier feed liquor flexible pipe 10 is inserted in the liquid additive container, after dry powder adds, close dry powder stop valve 8, open liquid additive stop valve 9, the negative pressure of vacuum of utilizing liquid that high pressure dosing three cylinder pump 34 discharged and jet pipe 16 throttlings to form, liquid additive is drawn among the present invention, and enters fluid reservoir 38 after the swiftly flowing liquid of jet pipe 16 ejection mixes; After the amount suction of liquid additive reaches requirement, closing liquid additive stop valve 9.
3. the mixing of solid additive
When adding liquid additive, close air intake control valve 5, prevent that the air-flow that negative pressure forms from entering from the funnel bottom, can not suck the solid additive in the funnel downwards.Solid additive is poured in the funnel 2, after the mixing of liquid additive finishes, closing liquid additive stop valve 9, open 2 inches ball valves 23, allow solid additive under negative pressure, be inhaled into main mixing in the threeway 17, after the flow at high speed liquid of jet pipe 16 ejections mixes mutually, be difficult for inhaling inclined to one side flexible pipe 37 by the band steel wire and enter in the fluid reservoir 38.
The solid additive that caking in funnel 2, occurs, be stuck in when not going down in the funnel 2, open high-pressure ball valve 24, adopt 19 controls of second needle-valve to spray discharge capacity, allow the liquid of high flow rate spray the caking dry powder additive, cut injection, after it is smashed by small nozzle 3, sucked by negative pressure of the present invention, mix.
4. after the solid additive mixing is finished, carry out strength of fluid and evenly follow timing, should close 2 inches ball valves 23, prevent that a large amount of air from entering in the fluid reservoir 38, form jar phenomenon of overflowing; Liquid is backed in the funnel 2 after also preventing termination of pumping, avoids returning being discharged to the well site contaminated environment.
5. after first jar of liquid dosage finished, second jar of liquid is repeated above-mentioned compound method, until all fracturing fluid preparations are finished.
New technology of the present invention is as follows:
1. the dry powder controllable negative pressure sucks technology
By the swiftly flowing liquid of high pressure dosing three cylinder pump 34 with jet pipe 16 injections, reaching the band steel wire in lower pipeline of the present invention is difficult for can forming negative pressure in the inclined to one side flexible pipe 37 of suction, when the flow velocity of discharging was high more, the negative pressure of formation can be big more, and its peak suction can reach vacuum state; Fluid flow is big more, and the chock pressure difference by jet pipe 16 will be big, nozzle exit flow velocity height, and the negative pressure of formation can be low more, and formed air mass flow is big more.Therefore, adopt the high velocity liquid stream of high-pressure large-displacement, can form the negative pressure air stream of big flow; By the flow of control suction air, allow dry powder by the flow at high speed air that negative pressure sucks, dry powder is dispelled; After dry powder is disperseed fully, brought into by air in the swiftly flowing liquid of jet pipe 16 ejection and mix, can not form the flake of glue bag powder, be similar to sandstorm with the action principle of sand and dust.
2. solid potassium chloride additive injection negative pressure sucks technology
Make full use of the rapidly-soluble performance characteristics of potassium chloride, highly pressurised liquid with the controlled fracturing fluid blender of negative pressure jet pipe 16 front portions, import the middle part of funnel, spray cutting, allow block potassium chloride be smashed, and dissolve in the funnel aquation in advance by High-Pressure Water, the negative pressure liquid that forms by the funnel bottom flows, with the bottom of the controlled fracturing fluid blender of its negative suction, enter in the discharge pipe, bring fluid reservoir 38 into and enter mixing.
3. the anti-negative pressure that adopts wired hose to discharge is inhaled inclined to one side technology
The outlet line of the controlled fracturing fluid blender of negative pressure is designed to the sebific duct that can bear negative pressure with steel wire, avoid in the process for preparation, the negative pressure that flow at high speed liquid forms in the pipe is pressed it partially, influences the handling capacity of mixture, even causes the obstruction of this pipeline in the dosing process.
4. liquid additive is prevented the negative pressure suction technology that air is sneaked into.
Adopt the negative pressure suction, make full use of the formed negative pressure of the controlled fracturing fluid blender of negative pressure, in the controlled fracturing fluid blender of liquid additive negative suction, mix with liquid, stop air and frother and mix generation foam in back with water, form the generation of jar phenomenon of overflowing.
5. ball-and-seat prevents technique of backflow automatically.
On the dry powder blend pipeline, designed ball-and-seat 7, reflux to the cementation of guanidine rubber powder in order to solve liquid.
6. prevent the jet pipe technology that liquid and dry powder directly contact.
Pipeline flow process by the dry powder add-on system as can be seen, dry powder is under the effect of air-flow, after having turned 4 right angle bends (gas powder mixing tee 4, second threeway 28, first threeway 27, main mixed threeway 17), entered bottom of the present invention, at this moment, owing to the difference of air-flow and dry powder quality, can cause the segregation phenomenon of gas powder, have partly dry powder inflow bottom bullnose 16 places (this place of blender in the past is a nozzle), rather than bring into air-flow; When a certain amount of dry powder with after the liquid of nozzle (originally) ejection directly contacts, still can form the flake of glue bag powdery, cause the guanidine rubber powder still to separate bad formation flake with water-soluble.
Problem has been taked to solve with the spray regime of jet pipe 16 hereto, has substituted the nozzle of blender.When a part of guanidine solation is gone into jet pipe 16 places, because of it changes the direction of motion again, the gas powder can separate again, some guanidine rubber powder can enter discharge pipe with air-flow, carry out the preparation of mixing while discharging, and a part of guanidine rubber powder can be deposited on this corner of jet pipe 16, and the swiftly flowing liquid of getting along well contacts, and has avoided forming the flake of glue bag powder; When the guanidine rubber powder that deposits increases gradually, when having dwindled gas channels, air-flow can be taken away the guanidine rubber powder that rests on this place again conversely, being among the dynamic equilibrium so repeatedly, avoided dry powder to contact, entered mixing but the guanidine rubber powder is brought in the swiftly flowing liquid by air-flow with the direct of liquid.
7. high-pressure large-displacement preparation technique.
For of the fracturing fluid on-the-spot preparation,, therefore, adopt the high-pressure large-displacement preparation technique can reach following effect because of the existing required high-power dosing equipment in scene:
(1) by improving the injection discharge capacity of high pressure dosing three cylinder pump, with the throttling expulsion pressure of the controlled fracturing fluid blender of raising negative pressure, and then the flowing velocity of raising liquid.After swiftly flowing liquid enters fluid reservoir 38,, under flow at high speed, must have certain movement inertia because of unit liquid itself has certain quality.After the liquid with very big movement inertia enters fluid reservoir 38, will inevitably be in fluid reservoir 38 Automatic Cycle, the stirring that further circulates of pulvis material that liquid is entrained and the liquid in the fluid reservoir 38 reaches the requirement that thickening agent further mixes.
(2) by verification experimental verification, the employing internal diameter is 10-12mm, the jet pipe of main mixed threeway 17 internal diameters in length 〉=bottom, and the preparation discharge capacity is that 500-700L/min is advisable, at this moment, the present invention is that the nozzle exit pressure of the controlled fracturing fluid blender of negative pressure can reach 5-7MPa.
Claims (4)
1. the controlled fracturing fluid blender of negative pressure is characterized in that: comprise that solid additive system, gas powder hybrid system and liquid add the negative pressure intake system; Described solid additive system comprises funnel (2), and funnel (2) bottom is connected with the 3rd threeway (33), globe valve (23), nipple joint (22), first threeway (27) in turn and mainly mixes threeway (17); Main threeway (17) one ends that mix link to each other with first union (18) by high pressure pipe nipple (32), and the other end links to each other with second union (11) by low pressure pipe nipple (30); High pressure pipe nipple (32) is connected with jet pipe (16) near a main end endoporus that mixes threeway (17), and low pressure pipe nipple (30) is inlaid with near a main end endoporus that mixes threeway (17) and mixes trunnion (14); Described gas powder hybrid system comprises the gas powder mixing tee (4) that an end links to each other with the 3rd threeway (33), gas powder mixing tee (4) other end connects first needle-valve (29), air inlet pipe (45) and the inside that is installed in gas powder mixing tee (4) after first needle-valve (29) is connected; Gas powder mixing tee (4) bottom is connected with transparent hose (6), ball-and-seat (7) and the dry powder stop valve (8) of band steel wire in turn; Described liquid adds the negative pressure intake system and comprises second threeway (28) that is connected with dry powder stop valve (8) bottom, one termination, first threeway (27) of second threeway (28), the other end taps into liquid flexible pipe (10) by liquid additive stop valve (9); Described high pressure pipe nipple (32) upper end is connected with second needle-valve (19) in turn, is provided with the high-pressure hose (25) and the elbow bend (39) of high-pressure ball valve (24), elbow bend (39) links to each other with little four-way (40) on being fixed on funnel (2), be evenly equipped with four nozzles on the funnel (2), the outlet of little four-way (40) one ends is connected with a nozzle, its excess-three nozzle all is fixed on the funnel (2) by mini three links (41), is connected by high pressure nozzle tube connector (26) between little four-way (40) and the mini three links (41).
2. the controlled fracturing fluid blender of a kind of negative pressure according to claim 1 is characterized in that: described globe valve (23) internal diameter is 2 inches, and nipple joint (22) internal diameter is 2 inches, and little four-way (40) internal diameter is
3/
8Inch, nozzle diameter is 1mm, high pressure nozzle tube connector (26) internal diameter is
3/
8Inch; Described nipple joint (22) is that 2 inches movable joint (20) links to each other with first threeway (27) by internal diameter; It is that 2 inches tube connector (15) is connected with low pressure pipe nipple (30) by internal diameter that described master mixes threeway (17); Weldering internal diameter in described high pressure pipe nipple (32) upper end is
1/
2The pipe nipple of inch connects second needle-valve (19) again, by an internal diameter is again
1/
2The inch steel pipe connects high-pressure ball valve (24), by an internal diameter is again
1/
2The high-pressure hose (25) of inch connects internal diameter
1/
2The elbow bend (39) of inch; The joint of hangnail structure, the transparent hose of connecting band steel wire (6) are adopted in described gas powder mixing tee (4) bottom; The top of described funnel 2 is provided with cover plate (1), enters in the funnel (2) to prevent foreign matter.
3. the controlled fracturing fluid blender of a kind of negative pressure according to claim 1 is characterized in that: described solid additive system, gas powder hybrid system and liquid add the negative pressure intake system and are fixed on the framework (21), are convenient to install and use and carry.
4. the controlled fracturing fluid blender of a kind of negative pressure according to claim 3, it is characterized in that: described high pressure pipe nipple (32) and low pressure pipe nipple (30) are pressed on the framework (21) by anti-rotation backing plate (12) respectively, and are fixed on the framework (21) by U-shaped clamp (13).
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| CN 201110206964 CN102350239B (en) | 2011-07-22 | 2011-07-22 | Negative pressure controllable fracturing fluid mixer and fracturing fluid preparation system |
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| CN 201110206964 CN102350239B (en) | 2011-07-22 | 2011-07-22 | Negative pressure controllable fracturing fluid mixer and fracturing fluid preparation system |
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| CN102350239A CN102350239A (en) | 2012-02-15 |
| CN102350239B true CN102350239B (en) | 2013-07-31 |
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| FR2990233B1 (en) * | 2012-05-04 | 2014-05-09 | Snf Holding Company | IMPROVED POLYMER DISSOLUTION EQUIPMENT SUITABLE FOR IMPORTANT FRACTURING OPERATIONS |
| FR2994706B1 (en) * | 2012-08-27 | 2014-08-22 | Spcm Sa | ADDITIVE PREPARATION CENTER FOR HYDRAULIC FRACTURING OPERATIONS AND HYDRAULIC FRACTURING METHOD USING THE PREPARATION CENTER |
| US10118137B2 (en) * | 2015-07-23 | 2018-11-06 | Ecolab Usa Inc. | Solid product dispenser for small volume applications |
| CN106640024B (en) * | 2017-01-12 | 2023-03-10 | 中国石油天然气集团有限公司 | Closed sand mixing device and method |
| CN107890814A (en) * | 2017-12-27 | 2018-04-10 | 刘晓莉 | A kind of raw material with output pressure control function is stirred output device |
| CN112049615A (en) * | 2018-08-13 | 2020-12-08 | 宋协翠 | Stratum energy supplementing device and method |
| CN111589314A (en) * | 2020-05-29 | 2020-08-28 | 中国石油天然气集团有限公司 | Flushing and mixing device capable of preparing high-viscosity fracturing acid liquid |
| CN112412395A (en) * | 2020-12-01 | 2021-02-26 | 中国石油天然气集团有限公司 | High-pressure gas-liquid mixing injection control system |
| CN112844089B (en) * | 2021-03-19 | 2024-05-24 | 湖北安逸智控环保科技有限公司 | Adjustable low-low venturi high-efficiency jet suction funnel |
| CN113563860B (en) * | 2021-08-22 | 2022-04-26 | 大庆永铸石油技术开发有限公司 | Preparation method of slickwater fracturing fluid system for shale oil reservoir and pumping method thereof |
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| CN102350239A (en) | 2012-02-15 |
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