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15 条记录 (耗时 0.017 秒)

    Method for recovering viscous asphaltic or bituminous petroleum
    3.
    发明授权
    Method for recovering viscous asphaltic or bituminous petroleum 失效
    粘性沥青或沥青石油回收方法

    公开(公告)号：US3938590A

    公开(公告)日：1976-02-17

    申请号：US483173

    申请日：1974-06-26

    申请人： David A. Redford ,  David L. Mitchell

    发明人： David A. Redford ,  David L. Mitchell

    IPC分类号： C09K8/592 ,  E21B43/24 ,  E21B43/22 ,  E21B43/26

    CPC分类号： C09K8/592 ,  E21B43/24 ,  E21B43/2405

    摘要： Disclosed is a process for recovering petroleum from subterranean, viscous asphaltic or bituminous petroleum-containing formations, including subterranean tar sand deposits. A zone of gas permeability is established in the formation first, such as by fracturing or gas sweeping a section of the formation. Oxidizing gas such as oxygen, air, oxygen enriched air, ozone, or chlorine, or a mixture of steam and an oxidizing gas is introduced into the zone of increased gas permeability to expand the zone and further to cause a reaction to occur between the oxidizing gas and the oxygen-susceptible groups or labile groups associated witn the bituminous or asphaltic petroleum molecules forming acidic or aldehyde groups. Next, a gaseous or liquid alkalinity agent such as ammonia is introduced into the formation to react with the oxidatively pre-treated groups in the bituminous or asphaltic petroleum to form surface active agents or surfactants in situ. Finally, steam or a mixture of steam and an alkalinity agent such as ammonia or steam and air or a mixture of steam, oxidative gas and an excess of ammonia is introduced into the treated zone to recover petroleum. This process may be applied as a push-pull process or it may be applied in a multi well, throughput process. In a preferred embodiment, gaseous ammonia serves as an alkaline agent to neutralize the surface active agents formed in the formation, and also functions as a non-condensable gas to prevent loss of gas permeability as the viscous petroleum is heated in the final stages of the process.

    摘要翻译： 公开了一种从地下粘性沥青或沥青含石油地层（包括地下焦油砂沉积物）回收石油的方法。 首先在地层中建立气体渗透区，例如通过压裂或气体清扫地层的一部分。 将氧气，空气，富氧空气，臭氧或氯气，或蒸气和氧化性气体的混合物等氧化性气体引入增加气体透过性的区域，使该区域膨胀，并进一步在氧化剂 气体和与易燃基团或不稳定基团相关联的沥青或沥青石油分子形成酸性或醛基。 接下来，将诸如氨的气态或液体碱性剂引入地层中以与沥青或沥青石油中的氧化预处理基团反应以原位形成表面活性剂或表面活性剂。 最后，将蒸汽或蒸汽和碱性剂如氨或蒸汽和空气的混合物或蒸汽，氧化气体和过量的氨的混合物引入经处理的区域以回收石油。 该过程可以作为推挽过程应用，或者可以应用于多井，吞吐量过程中。 在优选的实施方案中，气态氨用作碱性剂以中和地层中形成的表面活性剂，并且还用作不可冷凝气体，以防止在粘性石油在最终阶段被加热时气体渗透性的损失 处理。

    Strip-lifting apparatus with improved lifting bars
    4.
    发明授权
    Strip-lifting apparatus with improved lifting bars 失效
    带提升条的带式提升装置

    公开(公告)号：US3565311A

    公开(公告)日：1971-02-23

    申请号：US3565311D

    申请日：1969-01-09

    申请人： DAVID L MITCHELL JR

    发明人： MITCHELL DAVID L JR

    IPC分类号： B66C1/22 ,  C23G3/02 ,  B65H23/26

    CPC分类号： B66C1/22 ,  C23G3/025

    摘要： In an apparatus for lifting sheet steel strip into and out of a pickling tank, improved lifting bars formed in an L-shape and having an acid-resistant polypropylene covering surrounding a major portion of the length thereof and an acid-resistant polypropylene sleeve snugly fitted on the covering extending over the lower leg of the bar. The sleeve serves as the bearing surface for the strip and can be simply removed and replaced.

    Method of increasing strength of cast aluminum components
    5.
    发明授权
    Method of increasing strength of cast aluminum components 失效
    提高铸铝件强度的方法

    公开(公告)号：US5584334A

    公开(公告)日：1996-12-17

    申请号：US350294

    申请日：1994-12-06

    申请人： James L. Oswald ,  Paul M. LeTarte ,  Paul A. Ballas ,  David L. Mitchell

    发明人： James L. Oswald ,  Paul M. LeTarte ,  Paul A. Ballas ,  David L. Mitchell

    IPC分类号： B22D27/08 ,  B22D27/20

    CPC分类号： B22D27/08 ,  B22D27/20

    摘要： A method in particular, comprises the steps of: (a) preparing a mold having a sprue leading to a substantially horizontally oriented runner, at least one riser extending from the runner, and walls defining a mold cavity in communication with the riser; (b) providing a shallow reaction chamber in the runner containing grain refining inoculant solids therein, the inoculant having a surface exposed substantially tangentially to the flow of molten metal through the runner; (c) pouring a charge of molten aluminum into the sprue with a sufficient pressure head to fill the cavity, the flow being substantially laminar through the runner; and (d) inverting the mold substantially immediately after mold filling and prior to solidification of the metal in the mold cavity.

    摘要翻译： 特别地，一种方法包括以下步骤：（a）制备具有通向基本上水平定向的浇道的浇道的模具，至少一个从流道延伸的提升管和限定与提升管连通的模腔的壁; （b）在所述流道中提供含有晶粒细化孕育剂固体的浅反应室，所述孕育剂具有基本上相对于流过所述流道的熔融金属流动而暴露的表面; （c）用足够的压头将熔融铝浇注到浇口中以填充空腔，该流动基本上穿过流道层流; 和（d）在模具填充之后并且在模具腔内的金属凝固之前基本上立即翻转模具。

    Molded articulated sled
    10.
    发明授权
    Molded articulated sled 失效
    模制的SLED

    公开(公告)号：US3591193A

    公开(公告)日：1971-07-06

    申请号：US3591193D

    申请日：1969-11-14

    申请人： DAVID L MITCHELL JR

    发明人： MITCHELL DAVID L JR

    IPC分类号： B62B13/18 ,  B62B13/04

    CPC分类号： B62B13/18

    摘要： A molded articulated sled having a semihemispherical front and elongated rear section with mated bearing surfaces pivotally connected together. The rear section extending into the front section and having a shape conforming generally to the shape of the front; both of the sections having longitudinal runners adapted to receive coaster wheels and axles.