Oil field water anti-scale coalescence packing structure and three-phase separator

Abstract

The utility model relates to an oil field water antiscale coalescence packing structure and a three-phase separator, the oil field water antiscale coalescence packing structure comprises fixed net layers, a hollow cubic layer and a porous cubic layer, the two fixed net layers are oppositely arranged to form a packing interlayer; the hollow cubic layer and the porous cubic layer are sequentially arranged in the filler interlayer from bottom to top; the hollow cubic layer comprises a plurality of stacked hollow cubes; the porous cubic layer comprises a plurality of stacked porous cubes. According to the oil field water anti-scale coalescence packing structure, the porous cubic layer on the upper layer is supported through the hollowed-out cubic layer, the hollowed-out cubic layer is high in stacking strength, a firm barrier can be formed to support the porous cubic layer, the hollowed-out cubic layer and the porous cubic layer are fixed through the fixing net layer, collapse deformation of the packing structure is avoided, and the anti-scale coalescence packing structure is good in anti-scale effect. The long-term use process is firm and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy, and particularly relates to a scale prevention and coalescence packing structure for oilfield water and a three-phase separator. Background Technique

[0002] The associated water of oilfield crude oil is a metamorphic hydrothermal fluid formed during the geological evolution process, and its components are saturated water of various metal salts and complexes. During the exploitation process of crude oil, the associated water enters the ground environment along with the crude oil. As the pressure and temperature decrease, the minerals in the water are saturated and precipitated, and scale formation occurs. The bacteria and other microorganisms contained in it will rapidly reproduce when contacting oxygen, which will accelerate the corrosion of the steel in the crude oil water separation system.

[0003] The three-phase separator can separate the three phases of oil, gas, and water to remove a large amount of associated water. The separation efficiency of the three-phase separator is related to temperature, packing, and time. Among them, the packing is the key factor controlling the separation efficiency.

[0004] The oilfield three-phase separator is usually designed horizontally. In the prior art, the regular corrugated packing of a vertical packing tower is installed vertically as the packing of the oilfield three-phase separator. However, when the regular corrugated packing is installed vertically, its own gravity holding capacity is weak and it is extremely easy to deform. Content of the Utility Model

[0005] In order to solve the above problems existing in the prior art, the utility model provides a scale prevention and coalescence packing structure for oilfield water and a three-phase separator. The technical problems to be solved by the utility model are realized through the following technical solutions:

[0006] The first aspect of the utility model provides a scale prevention and coalescence packing structure for oilfield water, including: a fixed mesh layer, a hollow cubic layer, and a porous cubic layer, wherein,

[0007] The two fixed mesh layers are arranged oppositely to form a packing interlayer;

[0008] The hollow cubic layer and the porous cubic layer are sequentially arranged in the packing interlayer from bottom to top;

[0009] The hollow cubic layer includes a plurality of stacked hollow cubes;

[0010] The porous cubic layer includes a plurality of stacked porous cubes.

[0011] In an implementable manner, the fixed mesh layer includes a plurality of stacked woven meshes;

[0012] The woven mesh includes a plurality of metal wires, wherein, adjacent two metal wires are cross-wound with each other to form a plurality of diamond-shaped holes.

[0013] In an implementable manner, the hollow cube includes six hollow square plates;

[0014] Each of the hollow square plates includes: a first frame body, a second frame body, and a connecting column, wherein,

[0015] The first frame body and the second frame body are concentrically arranged, and the first frame body is located on the periphery of the second frame body;

[0016] The connecting column is connected between the first frame body and the second frame body.

[0017] In an implementable manner, the interior of the porous cube has a number of through holes.

[0018] In an implementable manner, the porosity of the porous cube is 50% - 81%, and the average pore diameter is 0.2 - 4 mm.

[0019] In an implementable manner, the materials of the fixed mesh layer, the hollow cube layer, and the porous cube layer are all copper-zinc alloy or copper-zinc-nickel alloy.

[0020] In an implementable manner, the materials of the fixed mesh layer, the hollow cube layer, and the porous cube layer are all copper-zinc alloys with a zinc mass ratio of 35% - 45%.

[0021] In an implementable manner, the height ratio of the hollow cube layer to the porous cube layer is 1:0.5 - 2;

[0022] The thickness of the fixed mesh layer is 5 - 20 cm;

[0023] The side lengths of the hollow cube and the porous cube are 5 - 20 cm.

[0024] The second aspect of the present utility model provides a three-phase separator, having the oilfield water scale prevention and coalescence filler structure provided by the first aspect of the present utility model;

[0025] The oilfield water scale prevention and coalescence filler structure is arranged inside the three-phase separator, dividing the interior of the three-phase separator into an inlet end and an outlet end.

[0026] In an implementable manner, a liquid inlet is provided at the top of the inlet end of the three-phase separator, and a drain outlet is provided at the bottom;

[0027] An exhaust port is provided at the top of the outlet end of the three-phase separator, and an oil drain port is provided at the bottom.

[0028] Compared with the prior art, the beneficial effects of the present utility model:

[0029] The anti-scaling coalescing packing structure for oilfield water provided by the utility model is supported by a hollow cubic layer for the upper porous cubic layer. The hollow cubic layer has high stacking strength and can form a solid barrier to support the porous cubic layer. The hollow cubic layer and the porous cubic layer are fixed by a fixing mesh layer to prevent the packing structure from collapsing and deforming, and it is firm and reliable during long-term use. Description of the Drawings

[0030] Figure 1 is a schematic structural diagram of an anti-scaling coalescing packing structure for oilfield water in an embodiment of the utility model;

[0031] Figure 2 is a schematic structural diagram of the woven mesh in an embodiment of the utility model;

[0032] Figure 3 is a schematic structural diagram of the hollow square plate in an embodiment of the utility model;

[0033] Figure 4 is a schematic structural diagram of a three-phase separator in an embodiment of the utility model.

[0034] Reference Signs:

[0035] 1: Fixing mesh layer; 11: Woven mesh; 111: Metal wire; 112: Diamond-shaped hole; 2: Hollow cubic layer; 21: Hollow cube; 211: First frame; 212: Second frame; 213: Connecting column; 3: Porous cubic layer; 31: Porous cube; 1000: Anti-scaling coalescing packing structure for oilfield water; 2000: Three-phase separator; 2001: Liquid inlet; 2002: Drainage port; 2003: Exhaust port; 2004: Oil discharge port; 2005: Sludge discharge port. Detailed Embodiments

[0036] The following further describes the utility model in detail with specific embodiments, but the embodiments of the utility model are not limited thereto.

[0037] Embodiment 1

[0038] Please refer to Figure 1 , Figure 1 which is a schematic structural diagram of an anti-scaling coalescing packing structure for oilfield water in an embodiment of the utility model.

[0039] An anti-scaling coalescing packing structure for oilfield water provided in this embodiment includes: a fixing mesh layer 1, a hollow cubic layer 2, and a porous cubic layer 3. Among them, two fixing mesh layers 1 are arranged oppositely to form a packing interlayer. The hollow cubic layer 2 and the porous cubic layer 3 are sequentially arranged from bottom to top in the packing interlayer. The hollow cubic layer 2 includes a plurality of stacked hollow cubes 21, and the porous cubic layer 3 includes a plurality of stacked porous cubes 31.

[0040] Specifically, the fixed mesh layer 1 is used to fix the hollow cubic layer 2 and the porous cubic layer 3 and intercept large-particle solid impurities contained in the oilfield water. A number of porous cubes 31 in the porous cubic layer 3 are neatly stacked in the vertical direction and are used for demisting and coalescing the oilfield water to remove droplets in the gas components and enable the associated water and solid-phase impurities to fully coalesce and settle. A number of hollow cubes 21 in the hollow cubic layer 2 are freely stacked in the vertical direction and are used for load-bearing and sewage discharge to support the upper porous cubic layer 3 and enable the sewage formed after the treatment of the porous cubic layer 3 and the settled sludge to smoothly settle through the gaps between the number of hollow cubes 21 and the hollow parts of the hollow cubes 21.

[0041] In this embodiment, the fixed mesh layer 1 includes a number of stacked woven meshes 11. Please refer to Figure 2 , the woven mesh 11 includes a number of metal wires 111. Among them, adjacent two metal wires 111 are cross-wound with each other to form a number of diamond-shaped holes 112. Specifically, the number of woven meshes 11 stacked in sequence can strengthen the binding force of the fixed mesh layer 1 on the hollow cubic layer 2 and the porous cubic layer 3, so that the oilfield water scale prevention and coalescence filler structure still has good stability under the condition of large liquid flow. Further, after filling the waste materials at the corners of the porous cubes 31 in the gaps between the upper and lower ends of the fixed mesh layer 1 and the hollow cubic layer 2 and the porous cubic layer 3, it is brazed into a whole with copper to further improve the stability and prevent vibration, collapse and displacement caused by scouring. It should be understood that the stacking direction of the number of woven meshes 11 is the flowing direction of the oilfield water, so that the oilfield water can flow smoothly through the diamond-shaped holes 112 on the woven mesh 11. In an implementable manner, the material of the metal wire 111 is copper-zinc alloy.

[0042] In this embodiment, the hollow cube 21 includes six hollow square plates. Each hollow square plate includes: a first frame 211, a second frame 212 and a connecting column 213. Among them, the first frame 211 and the second frame 212 are concentrically arranged, and the first frame 211 is located on the periphery of the second frame 212. The connecting column 213 is connected between the first frame 211 and the second frame 212.

[0043] Specifically, please refer to Figure 3, the edges of the six hollow square plates are welded to form a cube, forming a hollow cube 21. It should be understood that the interior of the hollow cube 21 is hollow. The center of the second frame 212 and between the first frame 211 and the second frame 212 are hollowed out. The first frame 211 and the second frame 212 are connected together by a connecting column 213. Sewage and sludge settle to the bottom through the hollow inside the hollow cube 21, the hollow in the center of the second frame 212, and the hollow between the first frame 211 and the second frame 212. Exemplarily, each hollow square plate includes four connecting columns 213, and the four connecting columns 213 are respectively fixed between the centers of the four sides of the first frame 211 and the centers of the four sides of the second frame 212.

[0044] In this embodiment, the porous cube 31 has a plurality of through holes inside. The porosity of the porous cube 31 is 50% to 81%, and the average pore size is 0.2 to 4 mm. The plurality of through holes inside the porous cube 31 can increase the contact area between the porous cube 31 and the oilfield water, so that the oilfield water is fully aggregated under the action of the porous cube 31.

[0045] In this embodiment, the materials of the fixed mesh layer 1 , the hollow cubic layer 2 and the porous cubic layer 3 are all copper-zinc alloy or copper-zinc-nickel alloy.

[0046] In an achievable manner, the woven mesh 11 is obtained by hinged copper-zinc alloy wires into a mesh. The hollow square plate is punched out of the copper-zinc alloy plate, and six hollow square plates are welded into a standard cubic block to form a hollow cube 21. The porous cube 31 is prepared by pressing the copper-zinc alloy powder, fine salt particles and additives into a green body, and then sintering it under an argon atmosphere, dissolving the NaCl particles in a circulating hot water device after sintering, and then washing it in an ultrasonic water bath and acetone, and finally drying it to obtain a foam copper brick consisting of a three-dimensional interconnected spatial network, that is, a porous cube 31.

[0047] In a feasible manner, the materials of the fixed mesh layer 1 , the hollow cubic layer 2 and the porous cubic layer 3 are all copper-zinc alloys with a zinc mass ratio of 35% to 45%.

[0048] Specifically, the copper-zinc alloy can prevent mineral scaling in associated water at the elemental level, has strong hydrophilicity at the interface, realizes the coalescence of oil droplets, and breaks emulsification and dissolves. The copper-zinc alloy has strong processing performance and can be processed into dimensions that conform to fluid movement, so as to fully turbulently collide, enabling the exchange and convergence of light and heavy substances. At the biological level, the copper ions in the copper-zinc alloy can inhibit bacterial reproduction, reduce the corrosion of iron-oxidizing bacteria, and extend the comprehensive safe service life cycle of the overall equipment. Moreover, an oxide layer can be formed on the surface of the copper-zinc alloy to avoid blockage, deposition, and scaling, and the surface can remain smooth during long-term production, greatly improving the corrosion resistance of the packing. The copper-zinc-nickel alloy can improve the mechanical processing performance of the metal on the basis of the copper-zinc alloy, reducing brittle fracture and internal stress. The oilfield water scale prevention and coalescence packing structure provided in this embodiment meets the application requirements in three-phase separators and demisters.

[0049] In this embodiment, the height ratio of the hollow cubic layer 2 to the porous cubic layer 3 is 1:0.5 - 2, and the thickness of the fixed mesh layer 1 is 5 - 20 cm. The side lengths of the hollow cubes 21 and the porous cubes 31 are 5 - 20 cm.

[0050] The oilfield water scale prevention and coalescence packing structure provided in this embodiment is supported by the hollow cubic layer 2 for the upper porous cubic layer 3. The hollow cubic layer 2 has high stacking strength and can form a solid barrier to support the porous cubic layer 3. The hollow cubic layer 2 and the porous cubic layer 3 are fixed by the fixed mesh layer 1, preventing the packing structure from collapsing and deforming, and being firm and reliable during long-term use.

[0051] Embodiment 2

[0052] Please refer to Figure 4 , Figure 4 which is a schematic structural diagram of a three-phase separator in an embodiment of the present utility model.

[0053] A three-phase separator provided in this embodiment has the oilfield water scale prevention and coalescence packing structure 1000 provided in Embodiment 1 of the present utility model. The oilfield water scale prevention and coalescence packing structure 1000 is arranged inside the three-phase separator 2000, dividing the interior of the three-phase separator 2000 into an inlet end and an outlet end.

[0054] In this embodiment, a liquid inlet 2001 is provided at the top of the inlet end of the three-phase separator 2000, and a drain outlet 2002 is provided at the bottom. An exhaust port 2003 is provided at the top of the outlet end of the three-phase separator 2000, and an oil drain port 2004 is provided at the bottom.

[0055] Specifically, the fixed mesh layer 1 in the oilfield water scale prevention and coalescence packing structure 1000 is arranged parallel to the end face of the three-phase separator 2000. The hollow cubic layer 2 is located in the lower half of the three-phase separator 2000, and the porous cubic layer 3 is located in the upper half of the three-phase separator 2000. The thickness of the oilfield water scale prevention and coalescence packing structure 1000 is greater than 1.5 times the inner diameter of the three-phase separator 2000. The mixed oil, gas and water enter through the liquid inlet 2001. The light metal elements tend to attach. Under the action of the copper ions diffused and dissolved in the oilfield water scale prevention and coalescence packing structure 1000, they are redispersed, agglomerated and self-balanced, forming water-soluble or suspended micro-mineral clusters that float out, preventing the metal elements from settling and scaling inside the three-phase separator 2000. The oilfield water scale prevention and coalescence packing structure 1000 filters and calms the foam emulsion state in the mixed oil, gas and water, and the associated gas is separated out and separately recovered through the exhaust port 2003. The micro-emulsified crude oil collides and grows at the packing interface, and then floats to the upper layer of the liquid phase and is recovered up to standard through the oil discharge port 2004. The associated water and solid impurities fully settle to the lower layer of the liquid phase and are discharged as sewage through the drain port 2002.

[0056] Furthermore, for a conventional crude oil three-phase separator, in order to increase long-term safety, zinc blocks are laid inside as sacrificial anodes for protection. However, the contact interface of the zinc blocks is very small, the conductivity is limited, the protection range is small, and the zinc blocks cannot be widely distributed inside the equipment, so the effect is limited. In the oilfield water scale prevention and coalescence packing structure 1000 provided in this embodiment, zinc elements and copper elements are fully diffused, and there are voids inside the oilfield water scale prevention and coalescence packing structure 1000. The local electrochemical corrosion on the surface of the oilfield water scale prevention and coalescence packing structure 1000 promotes renewal and dissolution. The internal voids keep the oilfield water scale prevention and coalescence packing structure 1000 in a state of fluid wave washing for a long time, providing an anodic protection effect for a long time and improving the long-term safety of the equipment.

[0057] In an implementable manner, the upper part of the oilfield water scale prevention and coalescence packing structure 1000 is fixed to the three-phase separator 2000 through copper plates and copper bolts and fastened with double nuts. The lower part of the oilfield water scale prevention and coalescence packing structure 1000 is fixed to the three-phase separator 2000 through brackets. A sludge discharge port 2005 is arranged below one side of the bracket close to the outlet end of the three-phase separator 2000. The connection between the oilfield water scale prevention and coalescence packing structure 1000 and the three-phase separator 2000 through copper material can disperse the conductivity, avoid the interruption and failure of a single connection, and further improve the long-term safety of the equipment in terms of electrochemical corrosion prevention. Optionally, the oilfield water scale prevention and coalescence packing structure 1000 provided in the first embodiment is also fixed at the bottom of the exhaust port 2003 to prevent the associated gas from increasing the flow rate when entering the pipeline from the large space inside the three-phase separator 2000, bringing the liquid droplets of the three-phase separator 2000 into the pipeline, making the gas phase too humid and interfering with the compressor. The oilfield water scale prevention and coalescence packing structure 1000 at the bottom of the exhaust port 2003 can fully intercept the liquid droplets.

[0058] The three-phase separator provided in this embodiment uses the oilfield water scale prevention and coalescence packing structure 1000 provided in the first embodiment to treat the mixed oil, gas and water, separate the mixed oil, gas and water, meet the separation conditions, ensure smooth internal fluid, have the function of anti-corrosion protection, and is safe and reliable for long-term operation.

[0059] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A scale prevention and coalescence filler structure for oilfield water, characterized in that Comprising: A fixed net layer (1), a hollow cubic layer (2), and a porous cubic layer (3), wherein The two fixed net layers (1) are arranged oppositely to form a packing interlayer; The hollow cubic layer (2) and the porous cubic layer (3) are sequentially arranged from bottom to top in the packing interlayer; The hollow cubic layer (2) includes a plurality of stacked hollow cubes (21); The porous cubic layer (3) includes a plurality of stacked porous cubes (31).

2. The scale prevention and coalescence filler structure for oilfield water according to claim 1, characterized in that The fixed net layer (1) includes a plurality of stacked woven nets (11); The woven net (11) includes a plurality of metal wires (111), wherein adjacent two of the metal wires (111) are cross-wound with each other to form a plurality of diamond-shaped holes (112).

3. The scale prevention and coalescence packing structure for oilfield water according to claim 1, characterized in that, The hollow cube (21) includes six hollow square plates; Each of the hollow square plates includes: a first frame body (211), a second frame body (212), and a connecting column (213), wherein The first frame body (211) and the second frame body (212) are concentrically arranged, and the first frame body (211) is located on the periphery of the second frame body (212); The connecting column (213) is connected between the first frame body (211) and the second frame body (212).

4. The anti-scaling coalescing packing structure for oilfield water according to claim 1, characterized in that, The interior of the porous cube (31) has a plurality of through holes.

5. The scale prevention and coalescence packing structure for oilfield water according to claim 4, characterized in that, The porosity of the porous cube (31) is 50% - 81%, and the average pore diameter is 0.2 - 4 mm.

6. The structure of a scale prevention and coalescence filler for oilfield water according to claim 1, characterized in that The materials of the fixed net layer (1), the hollow cubic layer (2), and the porous cubic layer (3) are all copper-zinc alloy or copper-zinc-nickel alloy.

7. The scale prevention and coalescence filler structure for oilfield water according to claim 1, characterized in that, The materials of the fixed net layer (1), the hollow cubic layer (2), and the porous cubic layer (3) are all copper-zinc alloys with a zinc mass ratio of 35% - 45%.

8. The structure of a scale and coalescence prevention filler for oilfield water according to claim 1, characterized in that The height ratio of the hollow cubic layer (2) to the porous cubic layer (3) is 1:0.5 - 2; The thickness of the fixed net layer (1) is 5 - 20 cm; The side lengths of the hollow cube (21) and the porous cube (31) are 5 - 20 cm.

9. A three-phase separator, characterized in that, Having the oilfield water scale prevention and coalescence packing structure (1000) as described in any one of claims 1 - 8; The oilfield water scale prevention and coalescence packing structure (1000) is arranged inside the three-phase separator (2000), dividing the interior of the three-phase separator (2000) into an inlet end and an outlet end.

10. A three-phase separator according to claim 9, characterized in that, At the top of the inlet end of the three-phase separator (2000), a liquid inlet (2001) is provided, and at the bottom, a drain outlet (2002) is provided; At the top of the outlet end of the three-phase separator (2000), an exhaust port (2003) is provided, and at the bottom, an oil drain port (2004) is provided.

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