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    Apparatus for reducing the production of particulate material in a subterranean well
    41.
    发明授权
    Apparatus for reducing the production of particulate material in a subterranean well 失效
    用于减少地下井中的颗粒物质的生产的装置

    公开(公告)号：US06152218A

    公开(公告)日：2000-11-28

    申请号：US174871

    申请日：1998-10-19

    Applicant: Mohammad Reza Safargar

    Inventor： Mohammad Reza Safargar

    IPC: E21B43/08 ,  E21B43/38 ,  E21B43/12

    CPC classification number: E21B43/38 ,  E21B43/086 ,  B01D2201/313

    Abstract: The present invention is directed to an apparatus for reducing the production of sand and other mineral particles within the production fluids of a subterranean wells. The apparatus includes a tubular conduit having openings therein which are protected by flow diversion shields. The flow diversion shields are arranged so that the flow of the production fluids into the tubular conduit is less than the gravitationally induced falling rate of the particulate material thereby separating a majority of the particulate material from the production fluid.

    Abstract translation: 本发明涉及一种用于减少地下井的生产流体内的砂和其它矿物颗粒的生产的装置。 该装置包括其中具有开口的管状导管，其被分流屏蔽件保护。 流动分流屏蔽被布置成使得生产流体流入管状管道的流量小于颗粒材料的重力引起的下落速率，从而将大部分颗粒材料与生产流体分离。

    Well casing assembly with erosion protection for inner screen
    42.
    发明授权
    Well casing assembly with erosion protection for inner screen 失效
    外壳组件，内屏防腐保护

    公开(公告)号：US5881809A

    公开(公告)日：1999-03-16

    申请号：US926308

    申请日：1997-09-05

    Applicant: George A. Gillespie ,  Stephen A. Uban

    Inventor： George A. Gillespie ,  Stephen A. Uban

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

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

    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.

    Abstract translation: 用于油气井，尤其是偏斜或水平井的井筒组件具有带有螺纹端部的内管构件，其允许多个壳体组件以串连接。 内管具有沿其长度的段的一系列穿孔，其被细长的筛网构件覆盖，防止砂粒通过。 同心的外保护罩构件在与内屏幕径向相对的区域中没有穿孔，以防止损坏屏幕。 外部构件的一个或多个穿孔区段与屏幕构件轴向间隔开，使得来自地层的向内流动在其到达屏幕之前将具有其能量和速度降低，从而最小化屏幕表面的侵蚀。 如果需要，诸如环形圈的穿孔流量控制装置可以位于筛管段末端处的内管和外部构件之间，以允许更均匀地流向筛网，从而进一步减少侵蚀。

    Wire mesh filter
    43.
    发明授权
    Wire mesh filter 失效

    公开(公告)号：US5849188A

    公开(公告)日：1998-12-15

    申请号：US862889

    申请日：1997-05-23

    Applicant: Benn Arild Voll ,  Bennett M. Richard ,  Allen Dale Gabrysch

    Inventor： Benn Arild Voll ,  Bennett M. Richard ,  Allen Dale Gabrysch

    IPC: B01D29/15 ,  B01D39/12 ,  B01D46/24 ,  E21B43/08

    CPC classification number: B01D29/15 ,  B01D39/12 ,  B01D46/2411 ,  E21B43/084 ,  E21B43/088 ,  B01D2201/0407 ,  B01D2201/313 ,  Y10T29/496 ,  Y10T29/49604

    Abstract: A filter is provided which combines a woven wire mesh over a supporting body. The supporting body is typically a metal perforated tube which provides fluid communication between the well bore and the production equipment string. The woven wire mesh acts as a filter to prevent the influx of sand particles, provides openings oriented at various angles relative to its surface, so that some area is available for fluid entry even when particulate matter is lodged on the surface above an opening, provides interior channels that allow fluid to travel from one location on the mesh surface to another location over an opening into the supporting body, and does not provide "straight-through" openings, thus forcing the fluid to make multiple turns to pass through the mesh, thereby dissipating the fluid's energy and increases the mesh's erosion resistance. When particulate matter accumulates on the mesh's surface, the resulting particle cake remains porous, heightening the filter's resistance to plugging.

    Recycling system for industrial vacuum machine
    44.
    发明授权
    Recycling system for industrial vacuum machine 失效
    工业真空机回收系统

    公开(公告)号：US5120333A

    公开(公告)日：1992-06-09

    申请号：US676837

    申请日：1991-03-28

    Applicant: Henry J. Davis

    Inventor： Henry J. Davis

    IPC: A47L9/20 ,  B01D46/00 ,  B01D46/04 ,  B01D50/00

    CPC classification number: B01D46/04 ,  A47L9/20 ,  B01D46/0075 ,  B01D46/4272 ,  B01D50/002 ,  B01D2201/313 ,  B01D2273/30 ,  B01D2279/55

    Abstract: Industrial vacuum machines such as those shown in U.S. Pat. No. 4,150,913 employ cloth filters in the last stage of separation of fine particles from the air stream. Such filter are cleaned inside the machine by vibration. In accordance with this invention, a baffle is movable between normal and recycling positions. In normal position the discharge of the vacuum impeller is discharged to the atmosphere. In recycling position the impeller discharge is diverted back into the primary separation chamber and then through the filters in order to remove dust and prevent its discharge to the atmosphere.

    Abstract translation: 工业真空机，如美国专利No. 4,150,913号在最后阶段从空气流中分离出细颗粒。 这种过滤器通过振动在机器内部进行清洁。 根据本发明，挡板可在正常位置和回收位置之间移动。 在正常位置，真空叶轮的排放物排放到大气中。 在再循环位置，叶轮排出物转回到初级分离室中，然后通过过滤器，以除去灰尘并防止其排放到大气中。

    Movable settling filter
    45.
    发明授权
    Movable settling filter 失效
    可移动沉降过滤器

    公开(公告)号：US3363761A

    公开(公告)日：1968-01-16

    申请号：US38223764

    申请日：1964-07-13

    Applicant: SEITZ WERKE GMBH

    Inventor： JOACHIM GROTH ,  HORST BENCKER

    IPC: B01D29/00 ,  B01D29/15 ,  B01D35/00 ,  B01D37/02 ,  C12C7/16 ,  F16H13/14

    CPC classification number: C12C7/165 ,  B01D29/15 ,  B01D29/52 ,  B01D29/60 ,  B01D29/603 ,  B01D29/668 ,  B01D29/925 ,  B01D29/96 ,  B01D35/00 ,  B01D37/02 ,  B01D37/04 ,  B01D2201/265 ,  B01D2201/313 ,  C12C7/16 ,  F16H13/14

    Abstract: A movable deposition filter comprises a filter tank associated with two mixing tanks, all the tanks being connectable selectively through fixed connections, the filter tank being mounted upright near one end of a chassis and the mixing tanks near the other end, all controls and instrumentation being mounted at, and accessible from, this other end of the chassis. One of the mixing tanks is intended to supply filter aid for forming a layer on the filter elements prior to filtration, the other (with agitator) to supply filter aid continuously during filtration. Preferably the valves in the interconnecting piping are arranged in groups -an inlet group, a mixing group and an outlet group. In operation, liquid to fill all the tanks is drawn in through an inlet valve and pumped at (14), Fig. 6 (not shown), through a mixing valve to the filter tank (13) and thence, when full, by overflow to the mixing tanks (11, 12) which are thereafter charged with filter aid. Next, filter aid slurry is withdrawn from mixing tank (11) through an inlet valve by pump (14), discharged into the filter tank (13), and passed therefrom along the filtrate pipe back to the mixing tank (11) in a closed cycle. For the filtration step liquid is drawn in through an inlet valve and mixed in the mixing valve housing with filter aid slurry drawn by a metering pump (15) from tank (12); it then flows through the elements in filter tank (13) to one or two outlet valves. The next stage is backwashing to remove the cake, for which purpose liquid is drawn in through an inlet valve and pumped through a mixing valve communicating with the filtrate side of the elements in tank (13). The cake accumulates at the bottom of the tank. Then the filter tank (13) is partially emptied under pressure by closing all inlet and mixing valves, opening an outlet valve, and admitting gas under pressure through a separate valve to the "unfiltered" space in the tank (13). The liquid is forced up discharge pipes each open at the lower end and extending downward within a filter element nearly to the bottom. The lower part (31) of the filter tank (13) may then be lowered, swung sideways and tipped about pivots to dispose of the residues. Where filtering is not required, liquid may be pumped directly from one or two inlet valves through one of the mixing valves to the exterior, the filter being by-passed and all the outlet valves being closed. Preferably each filter element consists of a hollow perforate cylinder with a closed lower end surrounded by a filter sleeve. The discharge pipe (mentioned above) has an outwardly-directed flange contacting the upper rim of the element so that the filtrate must flow downwards in the element and then up the pipe to reach the filtrate reservoir (32) above the element-supporting plate (34) in the tank (13).

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