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    FILTER DEVICE HAVING A DIVERGING CLEANING DUCT WITH INTERNAL PARTITIONS
    114.
    发明授权
    FILTER DEVICE HAVING A DIVERGING CLEANING DUCT WITH INTERNAL PARTITIONS 有权

    公开(公告)号：EP3055045B1

    公开(公告)日：2018-07-25

    申请号：EP14790766.1

    申请日：2014-10-07

    Applicant: N.V. PWN Waterleidingbedrijf Noord-Holland

    Inventor： KAMP, Petrus Cornelis

    IPC: B01D29/11 ,  B01D29/52 ,  B01D29/90

    CPC classification number: B01D29/66 ,  B01D29/114 ,  B01D29/23 ,  B01D29/52 ,  B01D29/902 ,  B01D2201/313 ,  B01D2201/44

    Abstract: A filter device includes a housing with an end part and a side wall and containing an axially arranged array of filter elements, such as ceramic elements. An inlet in the end part supplies fluid to the filter elements and an outlet in the side wall is provided for transporting filtered fluid from the housing, the side wall of the filter device being provided with a cleaning duct for supplying cleaning fluid to the filter elements via the side wall. The cleaning duct 6 includes a distal channel portion 15 having a relatively small diameter D1 and a proximal portion 16 adjacent the side wall having a relatively large diameter D2. A number of partitions 36, 37 extend in the proximal portion from a position at or near the sidewall towards the distal channel portion 15 at an angle (β) to a centre line 20 of the cleaning duct 6.

    IMPROVED SELF-CLEANING STRAINER
    117.
    发明公开
    IMPROVED SELF-CLEANING STRAINER 审中-公开
    改进的自洁SCREEN

    公开(公告)号：EP1624947A2

    公开(公告)日：2006-02-15

    申请号：EP04752015.0

    申请日：2004-05-13

    Applicant: Continuum Dynamics, Inc.

    Inventor： BILANIN, Alan, J. ,  KAUFMAN, Andrew, E.

    IPC: B01D37/00

    CPC classification number: B01D29/01 ,  B01D29/114 ,  B01D29/6415 ,  B01D29/666 ,  B01D29/86 ,  B01D29/904 ,  B01D2201/313

    Abstract: An externally powered, self cleaning strainer incorporating a projectile shield, which is capable of operating for an extended period of time. A suitably shaped, motor driven, impeller creates a localized, radially outward flow of fluid in the vicinity of the strainer inlet. The projectile shield has a lower surface shaped to deflect fluid to the strainer at a constant velocity, enabling the impeller to eject debris more efficiently. Maintaining a constant flow through the strainer also avoids additional head loss associated with accelerating flow. The self cleaning strainer may also include a brush attached diametrically opposite to the impeller to aid in removing debris from the inlet side of the strainer. The impeller may also be shaped so that when it is swept past the inlet side of the strainer, it causes a localized, reverse flow through the strainer, thereby removing debris particles from within the strainer.

    WELL CASING ASSEMBLY WITH EROSION PROTECTION FOR INNER SCREEN
    119.
    发明授权
    WELL CASING ASSEMBLY WITH EROSION PROTECTION FOR INNER SCREEN 有权
    很好地防腐蚀内心SCREEN管材管件

    公开(公告)号：EP1015092B1

    公开(公告)日：2002-07-31

    申请号：EP98944714.9

    申请日：1998-09-03

    Applicant: Weatherford/Lamb, Inc.

    Inventor： GILLESPIE, George, A. ,  UBAN, Stephen, A.

    IPC: B01D29/15 ,  B01D46/24 ,  E21B43/08

    CPC classification number: B01D46/0024 ,  B01D29/15 ,  B01D29/906 ,  B01D46/0045 ,  B01D46/2411 ,  B01D2201/0407 ,  B01D2201/313 ,  E21B43/088

    Abstract: Well casing assembly for use in oil and gas wells, and especially deviated or horizontal wells, has an inner pipe member with threaded ends which permit a number of casing assemblies to be joined in a string. The inner pipe has a series of perforations along a segment of its length which are covered by an elongated screen member which prevents the passage of sand particles. A concentric outer protective cover member is devoid of perforations in regions which are radially opposite the inner screen to prevent damage to the screen. One or more perforated segments of the outer member are axially spaced from the screen member so that inward flow from a formation will have its energy and velocity reduced before it reaches the screen, thereby minimizing erosion of the screen surface. If desired, perforated flow control devices such as annular rings can be located between the inner pipe and outer member at the ends of the screen segment to allow a more uniform flow to the screen, and thus further reduce erosion.

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