Fracturing flow-back fluid treatment skid-mounted device

Abstract

The utility model discloses a fracturing flow-back fluid treatment skid-mounted device, and relates to the technical field of flow-back fluid treatment equipment. The utility model relates to a fracturing flow-back fluid treatment skid-mounted device, which comprises a dosing metering unit for preparing various medicaments according to a proportion and adding various medicaments into a flow-back fluid; the pipeline mixing unit is used for fully mixing the flowback fluid and various medicaments; the sedimentation treatment unit is used for carrying out natural sedimentation layering on the flowback fluid after dosing and mixing; the filtering unit is used for swabbing supernate in the layered liquid and filtering the supernate; the sterilization unit is used for sterilizing the filtered water; and the filter pressing unit is used for extracting slurry in the layered liquid for filter pressing treatment. The utility model provides a fracturing flow-back fluid treatment skid-mounted device, which integrates various treatment processes, realizes seamless connection among units, is convenient to transport and quickly install on site, and meets the operation requirements of different sites of an oil field.

Description

TECHNICAL FIELD

[0001] The utility model relates to fracturing flowback fluid treatment equipment technical field especially, relates to a fracturing flowback fluid treatment pry dress device. BACKGROUND

[0002] The fracturing flowback fluid mainly includes drilling, fracturing, acidification, well washing flowback fluid, and the waste liquid has the characteristics such as high stability, high viscosity, high chroma, variability, complexity, and the component includes crude oil, formation water, PAM, melon gum, cleanup agent, clay stabilizer and other difficult degradation water-soluble polymer.

[0003] The relatively more flowback fluid has fracturing flowback fluid, drilling flowback fluid, acidification well washing flowback fluid and the like, and the composition of these flowback fluids is very complex, and the processing difficulty is big, is the combination of crude oil, suspended matter and various chemical additives, and if not effectively treated and directly injected into the formation, will cause irreversible damage to the formation. SUMMARY

[0004] The utility model embodiment provides a fracturing flowback fluid treatment pry dress device, integrates multiple processing technology, realizes seamless connection between each unit, and is convenient for transportation and on-site rapid installation, and meets the operation needs of different sites of oil field.

[0005] To solve the above technical problem, the technical scheme adopted by the utility model is:

[0006] The utility model embodiment provides a fracturning flowback fluid treatment pry dress device, comprising: dosing measurement unit is used for configuring various reagents according to the proportion, and adds various reagents in flowback fluid;

[0007] Pipeline mixing unit is used for fully mixing flowback fluid and various reagents;

[0008] The settlement processing unit is used for the natural settlement stratification of the flowback fluid after dosing mixing;

[0009] Filter unit is used for pumping the supernatant in stratified liquid and filtering;

[0010] The sterilization unit is used for sterilizing the water quality after filtering;

[0011] The filter pressing unit is used for extracting the mud in stratified liquid and carrying out filter pressing treatment.

[0012] In some embodiments, the settlement processing unit includes an inclined-tube settling tank, and the flowback fluid after dosing mixing flows and stratifies naturally in the inclined-tube settling tank. In some embodiments, the settlement processing unit includes an inclined-tube settling tank, and the flowback fluid after dosing mixing flows and stratifies naturally in the inclined-tube settling tank.

[0013] In some embodiments, the filtering unit comprises a filtering pump and a filter group;

[0014] The filtering pump is used for pumping supernatant in the layered liquid;

[0015] The filter group is used for filtering the supernatant.

[0016] In some embodiments, the filter group adopts several filter bags for filtering.

[0017] In some embodiments, the sterilization unit is provided with an ultraviolet lamp tube.

[0018] In some embodiments, the filter pressing unit comprises a sludge pump and a plate-and-frame filter press;

[0019] The sludge pump is used for pumping sludge in the layered liquid;

[0020] The plate-and-frame filter press is used for performing filter pressing treatment on the sludge.

[0021] In some embodiments, the medicament added in the medicament metering unit comprises citric acid, a PH regulator, condensed PAC and PAM.

[0022] The fracturing flowback fluid treatment skid-mounted device provided by the utility model, the fracturing discharge liquid of an oil and gas well firstly enters a sewage pit of a well site, the flowback fluid is lifted to a pipeline mixing unit by a sewage pump, various medicaments are added in the flowback fluid according to water quality sampling by a medicament metering unit, the various medicaments are fully mixed with the flowback fluid in the pipeline mixing unit and then enter a sedimentation treatment unit to perform natural sedimentation, the flowback fluid after sedimentation is pumped to pump supernatant in the layered liquid by a filtering unit and is filtered, and then is sterilized by a sterilization unit, so that the treated water quality reaches the production water standard and is stored in a clean water tank or is injected back into the oil and gas well, meanwhile, the sludge after sedimentation is lifted by a filter pressing unit and is subjected to solid-liquid separation, and the sludge is pressed into a mud cake, so that the sludge can be concentrated and buried.

[0023] The fracturing flowback fluid treatment skid-mounted device provided by the utility model, the flowback fluid after medicament reaction is subjected to sedimentation by an inclined pipe sedimentation tank, large particles form sludge which is lifted to a plate-and-frame filter press by a sludge pump to be pressed into a mud cake for concentrated burial treatment, and part of supernatant with small particles is pumped by a filtering pump and is subjected to fine filtration treatment by a filter group. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the present disclosure, the drawings needed to be used in some embodiments of the present disclosure will be briefly introduced as follows. Obviously, the drawings in the following description are only some drawings of the embodiments of the present disclosure, and other drawings can also be obtained by those skilled in the art according to these drawings. In addition, the drawings in the following description can be regarded as schematic diagrams, and are not limited to the actual size, actual process, etc. of the products involved in the embodiments of the present disclosure.

[0025] Figure 1 A structural schematic diagram of a fracturing flowback fluid treatment pry-mounted device according to some embodiments of the present disclosure. DETAILED DESCRIPTION

[0026] The technical solutions in some embodiments of the present disclosure will be described clearly and completely in combination with the drawings. Obviously, the described embodiments are only some of the embodiments of the present disclosure, but not all the embodiments. Based on the embodiments provided in the present disclosure, all other embodiments obtained by those skilled in the art are within the scope of protection of the present disclosure.

[0027] Unless otherwise required by the context, the term "comprising" is interpreted to mean "including, but not limited to" throughout the specification and claims. In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", or "some examples" are intended to mean that the particular feature, structure, material, or characteristic being described in connection with that embodiment or example includes at least one embodiment or example of the present disclosure. The illustrative representations of the above terms are not necessarily meant to refer to the same embodiment or example. In addition, the particular features, structures, materials, or characteristics described can be included in any suitable way in any one or more embodiments or examples.

[0028] An embodiment of the present utility model provides a fracturing flowback fluid treatment pry-mounted device, as shown in Figure 1 The device includes a dosing unit, a pipeline mixing unit, a sedimentation treatment unit, a filtration unit, a sterilization unit, and a filter pressing unit.

[0029] In some embodiments, the dosing unit is configured to proportionally configure various reagents and add the reagents to the flowback fluid. The dosing unit samples and detects the water quality in the flowback fluid, and then determines the components and proportions of the reagents to be added.

[0030] For example, the dosing unit includes a dosing tank 1.

[0031] Exemplary, the medicament added in the medicament metering unit includes: citric acid, PH regulator, condensed PAC (Polyaluminum Chloride), PAM (Polyacrylamide). Among them, citric acid can be combined with metal ions in the flowback fluid to prevent precipitation, scaling, and stabilize the chemical properties of the flowback fluid; the PH regulator can adjust the PH value of the flowback fluid to prevent equipment corrosion; the condensed PAC can be used as a coagulant to make the suspended particles in the flowback fluid coagulate, accelerate solid-liquid separation, and improve water quality; PAM can be used as a flocculant to promote the formation of large flocs from small particles and improve the efficiency of solid-liquid separation.

[0032] In some embodiments, the pipeline mixing unit is used to mix the flowback fluid and various medicaments sufficiently.

[0033] In some embodiments, the sedimentation treatment unit is used to perform natural sedimentation and stratification on the flowback fluid after medicament mixing. The sedimentation treatment unit uses gravity to make the solid particles and suspended solids in the flowback fluid naturally settle to the bottom to form a slurry layer, and the supernatant floats on the upper layer.

[0034] In some embodiments, the filtration unit is used to pump the supernatant in the stratified liquid and perform filtration.

[0035] In some examples, the filtration unit adopts a multi-stage filtration system, such as sand filtration, activated carbon filtration, precision filtration, etc., to remove small particles and suspended solids in the supernatant. The filtration unit can select filter materials of different precision according to the processing requirements to ensure that the filtered water quality meets the standards.

[0036] In some embodiments, the sterilization unit is used to sterilize the filtered water quality. The sterilization unit can kill bacteria, viruses and other microorganisms in the water to prevent the growth and reproduction of various bacteria and ensure that the treated water quality meets the relevant health standards.

[0037] In some embodiments, the pressure filtration unit is used to extract the slurry in the stratified liquid for pressure filtration treatment. The pressure filtration unit squeezes out the water in the slurry to form a dry mud cake, reducing the volume of the slurry and facilitating landfill treatment.

[0038] The fracturing flowback fluid treatment skid-mounted device provided by the utility model, the fracturing flowback fluid of oil and gas well firstly enters the sewage pit of well site, the flowback fluid is lifted to the pipeline mixing unit by the sewage pump, the dosing metering unit adds various medicaments according to the water quality sampling in the flowback fluid, various medicaments are fully mixed with the flowback fluid in the pipeline mixing unit and then enter the sedimentation treatment unit to carry out natural sedimentation, the flowback fluid after sedimentation is pumped to draw supernatant in the layered liquid by the filtering unit and carries out filtration, and then carries out sterilization through the sterilization unit, so that the water quality after treatment reaches the production water standard, is stored in the clean water tank or is injected back into the oil and gas well, meanwhile, the mud after sedimentation is lifted by the filter pressing unit and carries out solid-liquid separation, and the mud is pressed into mud cake, so that the mud can be concentrated and buried.

[0039] The fracturing flowback fluid treatment skid-mounted device provided by the utility model, the flowback fluid after adding medicament reaction is settled in the inclined pipe settling tank, the sludge with large particles is lifted to the plate and frame filter press to be pressed into mud cake by the sludge pump, and the supernatant with small particles is pumped to draw into the filter group to carry out fine filtration treatment.

[0040] In some embodiments, the pipeline mixing unit comprises a pipeline dynamic mixer 2. The flowback fluid and medicaments are fully mixed in the pipeline dynamic mixer, ensuring that the medicaments are uniformly distributed in the flowback fluid and improving the reaction efficiency of the medicaments and the flowback fluid.

[0041] In some embodiments, the sedimentation treatment unit comprises an inclined pipe settling tank 3. The flowback fluid after mixing with medicaments is naturally flowed and settled in the inclined pipe settling tank.

[0042] The inclined pipe settling tank is made by adopting the shallow pool principle, and the settling speed is 3-5 times that of the existing natural settling tank, and online rapid settling and pumping of supernatant can be realized, without the need for tank replacement or preparation of multiple settling tanks, thereby shortening the operation time, reducing the equipment investment cost, and saving the land area.

[0043] In some embodiments, the filtering unit comprises a filtering pump 4 and a filter group 5. The filtering pump is used to pump supernatant in the layered liquid, and the filter group is used to filter the supernatant.

[0044] In some examples, the filter group uses several filter bags for filtration.

[0045] Exemplarily, the filter bag is made of PP material. The PP material can withstand 90 DEG C, and has higher cost performance compared with PE polyethylene felt cloth and NMO nylon wire mesh, especially in the case that the pollution characteristics of the fracturing wastewater determine that the replacement cycle of the filter bag is shorter than normal.

[0046] In some embodiments, the filter pressing unit comprises a sludge pump and a plate-and-frame filter press, the sludge pump being used to extract the sludge in the layered liquid, and the plate-and-frame filter press being used to perform filter pressing treatment on the sludge. The sludge pump and the plate-and-frame filter press work together to complete the extraction and filter pressing treatment of the sludge.

[0047] Exemplarily, the sludge pump extracts the sludge deposited at the bottom by negative pressure or positive pressure, so as to ensure that the sludge can smoothly enter the plate-and-frame filter press.

[0048] Exemplarily, the plate-and-frame filter press extrudes the sludge between the filter plate and the filter frame by high pressure, so that the liquid (filtrate) is discharged through the filter cloth, and the solid (sludge cake) is left in the filter frame, thereby separating the solid and the liquid in the sludge.

[0049] In some embodiments, the sterilization unit is provided with ultraviolet lamps. The ultraviolet sterilization wave band is mainly between 200-300 nm, and the ultraviolet sterilization ability at a wavelength of 253.7 nm is the strongest. When various bacteria and viruses in water or air pass through the ultraviolet irradiation area, the ultraviolet light penetrates the cell membrane and nucleus of the microorganisms, destroys the nucleic acid molecular bond, and makes the microorganisms lose the ability of replication or vitality and die, so as to kill the bacteria in the treated water, and achieve the purpose of preventing the breeding of various bacteria.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, and are not limited. Other modifications or equivalent replacements to the technical solutions of the present application made by those skilled in the art should be covered in the scope of the claims of the present application, as long as they do not deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A skid-mounted device for treating fracturing flowback fluid, characterized in that: include: The dosing unit is used to prepare various reagents according to the proportions and add various reagents to the reflux liquid; Pipeline mixing unit is used to thoroughly mix backflow fluid and various agents; The sedimentation treatment unit is used to allow the backflow liquid after chemical mixing to settle and stratify naturally. A filtration unit is used to extract and filter the supernatant from the stratified liquid. The sterilization unit is used to sterilize the filtered water. The filter press unit is used to extract the slurry from the stratified liquid for filter pressing.

2. The skid-mounted device for treating fracturing flowback fluid as described in claim 1, characterized in that, The sedimentation treatment unit includes an inclined tube sedimentation tank, in which the backflow liquid after chemical mixing naturally flows, settles, and stratifies.

3. The skid-mounted device for treating fracturing flowback fluid as described in claim 1, characterized in that, The filtration unit includes a filtration pump and a filter assembly; The filter pump is used to draw the supernatant from the stratified liquid; The filter assembly is used to filter the supernatant.

4. The skid-mounted device for treating fracturing flowback fluid as described in claim 3, characterized in that, The filter assembly uses several filter bags for filtration.

5. The skid-mounted device for treating fracturing flowback fluid as described in claim 1, characterized in that, The sterilization unit is equipped with ultraviolet lamps.

6. The skid-mounted device for treating fracturing flowback fluid as described in claim 1, characterized in that, The filter press unit includes a sludge pump and a plate and frame filter press; The sludge pump is used to extract sludge from the stratified liquid. The plate and frame filter press is used to filter mud.

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