Dust reducing treatment for proppants during hydraulic fracturing operations

{
  "publication_number": "US10668440B2",
  "country": "US",
  "kind": "B2",
  "title": "Dust reducing treatment for proppants during hydraulic fracturing operations",
  "abstract": "Dust produced by handling proppant during fracking or other mechanical operations can be a health and/or safety hazard. The dust can be eliminated or at least mitigated using a method of conducting a hydraulic fracturing or other mechanical operation on an oil or gas well including treating a proppant that has been transported to an end use site at a level sufficient to prevent the formation of dust during handling of the proppant.",
  "claims": [
    "1. A mobile system for treating a proppant, the system comprising: two or more metering devices each configured with an inlet port, and the two or more metering devices receive at least a proppant and one or more material streams selected from the group of liquid feed streams, solid feed streams, and combinations thereof; a mixer directly connected to the two or more metering devices by delivery lines and configured to receive materials from the two or more metering devices; a heating unit disposed on the mixer; a dust collector coupled to the mixer; and a mobile platform which the two or more metering devices and the mixer are disposed on or integrated within, wherein the mixer further comprises an outlet port configured to transfer materials from the mixer to an end site use, wherein the system is continuous processing system and wherein the heating unit is adapted to heat materials in the mixer.",
    "2. The mobile system of claim 1 wherein the mobile system is further disposed within a container which can be placed on or coupled to a vehicle, is further disposed on a vehicle, or is further integrated within a vehicle.",
    "3. The mobile system of claim 1, wherein at least one of the two or more metering devices is coupled to a tank, and is adapted to receive a proppant.",
    "4. The mobile system of claim 3, further comprising a conveyor coupled to the mixer and the metering device coupled to the tank.",
    "5. The mobile system of claim 1 wherein the metering device is a weigh cell, a dry flow meter, or a weigh belt.",
    "6. The mobile system of claim 1 wherein the heating unit is selected from the group consisting of hot oil jackets, plate heaters, plasma heaters, direct flame heaters, radiant heaters, electric heating elements, microwave heaters, and combinations thereof.",
    "7. The mobile system of claim 1, wherein the mixer is selected from the group consisting of include Ribbon mixer, Planetary mixer, Plow mixer, Double Arm/Sigma mixer, z blade mixer, trough and Vertical mixer, High shear mixing blades/impellers mixer, and combinations thereof.",
    "8. The mobile system of claim 1, wherein at least one of the two or more metering devices is configured on the mixer allowing for a gravity feed process from the metering device to the mixer.",
    "9. The mobile system of claim 1, wherein the one or more material streams comprise one or materials selected from the group consisting of surfactants, gums, resins, thermoplastics, rubbers including synthetic rubbers, elastomers, thermoplastic elastomers, siloxanes, silicones and modified silicones, and combinations thereof.",
    "10. The mobile system of claim 1, wherein the outlet port is directly connected to an end use site.",
    "11. The mobile system of claim 1, wherein the inlet port of one of the two or more metering devices is directly connected to at least a proppant source and the inlet port of one of the two or more metering devices is directly connected to at least one chemical source, and wherein a pump is disposed between the at least one chemical source and one of the two or more metering devices.",
    "12. The mobile system of claim 1, wherein the mobile system is further disposed within a container, and wherein the container is placed up on the vehicle.",
    "13. A mobile system for treating a proppant comprising: a tank configured to receive a proppant; a metering device directly connected to the tank; a conveyor directly connected to the metering device; a mixer, wherein the mixer is configured to be: directly connected to the conveyor and configured to receive materials from the conveyor, and directly connected to one or more delivery lines, wherein each delivery line is directly connected to a material source selected from the group of liquid sources, solid sources, and combinations thereof; a heating unit disposed on the mixer; a dust collector coupled to the mixer and coupled to the tank by a tube; and a mobile platform which the tank, the metering device, the conveyor, and the mixer are disposed on or integrated within, wherein the mixer further comprises a mixer discharge configured to transfer materials from the mixer to an end site, wherein the system is continuous processing system and wherein the heating unit is adapted to heat materials in the mixer.",
    "14. The mobile system of claim 13 wherein the mobile system is further disposed within a container which can be placed on or coupled to a vehicle, is further disposed on a vehicle, or is further integrated within a vehicle.",
    "15. The mobile system of claim 13 wherein the metering device is a weigh cell, a dry flow meter, or a weigh belt.",
    "16. The mobile system of claim 13 wherein the mixer comprises a paddle style mixer.",
    "17. The mobile system of claim 16 wherein the heating unit is selected from the group consisting of hot oil jackets, plate heaters, plasma heaters, direct flame heaters, radiant heaters, electric heating elements, microwave heaters, and combinations thereof.",
    "18. The mobile system of claim 13, wherein the mixer is selected from the group consisting of include Ribbon mixer, Planetary mixer, Plow mixer, Double Arm/Sigma mixer, z blade mixer, trough and Vertical mixer, High shear mixing blades/impellers mixer, and combinations thereof.",
    "19. The mobile system of claim 13, wherein each of the material sources independently comprises a material selected from the group consisting of surfactants, gums, resins, thermoplastics, rubbers including synthetic rubbers, elastomers, thermoplastic elastomers, siloxanes, silicones and modified silicones, and combinations thereof.",
    "20. The mobile system of claim 19, wherein the mixer discharge is directly connected to an end use site.",
    "21. The mobile system of claim 13, wherein the mobile system is further disposed within a container, and wherein the container is placed up on the a vehicle."
  ],
  "description_excerpt": "The present invention relates to a method for reducing or mitigating the production of dust from the handling of the proppants. The present invention particularly relates to a method for reducing or mitigating the production of dust from the handling of the proppants during a hydraulic fracturing operation, a system for doing so.\n\nHistorically, hydraulic fracturing has been used for decades to stimulate production from oil and gas wells. Generally speaking, hydraulic fracturing, commonly referred to as fracking, consists of pumping fluid into a wellbore at high pressure. Inside the wellbore, the fluid is forced into the formation being produced. When the fluid enters the formation, it fractures, or creates fissures, in the formation.\n\nIn some instances, solid proppants are then dispersed in a fluid and the resulting slurry is pumped into the fissures to stimulate the release of oil and gas from the formation. They serve to hold the fissures open and, depending upon the type of proppant used, may serve other functions.\n\nThe proppants used in hydraulic fracturing operations are typically stored in sand bins, surge pits, tanks or other proppant storage devices. As the proppant is deposited therein or upon its exit, a large amount of dust may be propagated. Generally, the dust may accumulate therein or even exit into the environment. In either case, this dust can create dangerous conditions.\n\nFor example, in open sand bins, the dust may leave the sand bin and spread to surrounding areas, causing health hazards to people in the vicinity of the fracturing operation.",
  "cpc": [
    "B01F 15/00961",
    "B01F 13/004",
    "B01F 15/00428",
    "B01F 15/067",
    "B01F 2015/062",
    "B01F 2035/99",
    "B01F 2101/49",
    "B01F 2215/0081",
    "B01F 23/54",
    "B01F 3/1228",
    "B01F 33/5023",
    "B01F 35/184",
    "B01F 35/2218",
    "B01F 35/94"
  ],
  "ipc": [
    "B01F 15/02",
    "B01F 5/10",
    "B01F 13/00",
    "B01F 15/00",
    "B01F 15/06",
    "B01F 3/12"
  ],
  "assignees": [
    "Hexion Inc"
  ],
  "inventors": [
    "John W. Green",
    "Jerome F. Borges",
    "Scott E. SPILLARS",
    "Regie AHMAD",
    "Justin NILES",
    "Leo ELDER",
    "Adrian BARAJAS",
    "Chris E. HIGGANBOTHAM"
  ],
  "filing_date": "2015-06-15",
  "publication_date": "2020-06-02",
  "grant_date": "2020-06-02",
  "priority_date": "2014-06-17",
  "application_number": "US-201514739612-A",
  "family_id": "54835355",
  "cited_by_count": 3,
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}