CIRCULAR ECONOMY FOR PLASTIC WASTE TO POLYPROPYLENE VIA OIL REFINERY WITH FILTERING AND METAL OXIDE TREATMENT OF PYROLYSIS OIL

    公开(公告)号:US20210332300A1

    公开(公告)日:2021-10-28

    申请号:US17237633

    申请日:2021-04-22

    Inventor: Hye-Kyung Timken

    Abstract: Provided in one embodiment is a continuous process for converting waste plastic comprising polyethylene and/or polypropylene into recycle for polypropylene polymerization. The process comprises selecting waste plastics containing polyethylene, polypropylene, or a mixture thereof, and passing the waste plastics through a pyrolysis reactor to thermally crack at least a portion of the polyolefin waste and produce a pyrolyzed effluent. The pyrolyzed effluent is separated into offgas, a pyrolysis oil comprising a naphtha, diesel and heavy fractions, and char. The pyrolysis oil, or at least a fraction, is passed to a filtration/metal oxide treatment, with the treated product passed to a refinery FCC unit. A liquid petroleum gas C3 olefin/paraffin mixture fraction is recovered from the FCC unit, as well as a C4 olefin/paraffin mixture fraction. The C3 olefin fraction can be passed to a propylene polymerization reactor, and the C3 paraffin passed to a dehydrogenation unit to produce propylene for further polymerization.

    Systems and methods for multi-activity onshore field development

    公开(公告)号:US11091961B2

    公开(公告)日:2021-08-17

    申请号:US16738174

    申请日:2020-01-09

    Abstract: A system for developing multiple subterranean wellbores in a land-based field can include a first operational platform disposed over a first entry point of a first subterranean wellbore at a first time. The system can also include a second operational platform disposed over a second entry point of a second subterranean wellbore at the first time, where the first entry point and the second entry point are located proximate to each other. The system can further include first field equipment disposed on the first operational platform. The system can also include a second field equipment disposed on the second operational platform. The first field equipment can be used to develop the first subterranean wellbore, and the second field equipment can be used to develop the second subterranean wellbore.

    Drilling fluid for downhole electrocrushing drilling

    公开(公告)号:US11091683B2

    公开(公告)日:2021-08-17

    申请号:US16689243

    申请日:2019-11-20

    Abstract: The disclosure relates to an electrocrushing drilling fluid with an electrocrushing drilling base fluid including a polar oil, a non-polar oil, or a combination thereof and glycerine carbonate. The electrocrushing drilling fluid or base fluid may further include water or glycerin. The electrocrushing drilling fluid may further contain at least one additive. The electrocrushing drilling fluid may have a dielectric constant or dielectric strength of at least a set amount, an electric conductivity less than a set amount, or a combination of these properties. The disclosure further relates to an electrocrushing drilling system containing the electrocrushing drilling fluid and an electrocrushing drill bit.

    Downhole reconfiguration of pulsed-power drilling system components during pulsed drilling operations

    公开(公告)号:US11078727B2

    公开(公告)日:2021-08-03

    申请号:US16421251

    申请日:2019-05-23

    Abstract: A disclosed pulsed-power drilling system may include a controller that receives and analyzes feedback from downhole components reflecting changing conditions or performance measurements associated with a pulsed drilling operation to determine that an operating parameter of the drilling operation should be modified. The controller may output a control signal to cause an adjustment of a configurable downhole component, such as mechanical, electrical, or hydraulic component that affects the operating parameter, while the drill bit remains in the wellbore. The controller may adjust a segmented transformer of a pulse-generating circuit, changing the number of primary winding switches that are fired, or the timing of the firing of the switches, to modify characteristics of the generated pulses. Adjusting a downhole component may affect the drilling rate, the drilling direction, the flow of drilling fluid, a pulse rise time, a pulse repetition rate, or a rate of penetration for the drilling operation.

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