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    • 7. 发明授权
    • Method for treating oil and gas wells
    • 油气井处理方法
    • US07670994B1
    • 2010-03-02
    • US12019933
    • 2008-01-25
    • Lloyd Byron SpangleAllen A. Pence
    • Lloyd Byron SpangleAllen A. Pence
    • C09K8/588C08L29/00
    • C09K8/512C04B28/02C04B2103/0062C04B2103/46C09K8/487C04B22/0013C04B24/2623
    • A two step process for treating an oil or gas well. The first step uses a cross linking agent, such as borax, as a preliminary wash for the well following drilling. The cross linking agent cleans the well of excess mud and pre-coats the tubing and the formation surfaces with the cross linking agent. The second step introduces a cement-polymer mixture into the well. A polymer, such as for example polyvinyl alcohol, that undergoes cross linking when exposed to the cross linking agent is employed. When the polymer comes into contact with the cross linking agent in the well, cross linking of the polymer occurs. This cross linking helps to prevent fluid loss into the formation. Also, because the cross linking agent wash previously cleaned the surfaces of the tubing and the formation, better bonding between the cement and the surfaces of the tubing and the formation occurs.
    • 用于处理油或气井的两步法。 第一步使用交联剂,如硼砂,作为钻井后的井的初步洗涤。 交联剂清洗多余泥浆的井,并用交联剂预涂布管道和地层表面。 第二步将水泥 - 聚合物混合物引入井中。 使用当暴露于交联剂时经历交联的聚合物,例如聚乙烯醇。 当聚合物与孔中的交联剂接触时,发生聚合物的交联。 这种交联有助于防止流体流入地层。 而且,因为交联剂洗涤事先清洗了管道和地层的表面,所以发生了水泥与管道表面和地层之间的更好的结合。
    • 10. 发明授权
    • Protected polyvinyl alcohol auxiliary for forming fine pattern and process for producing the same
    • 用于形成精细图案的保护性聚乙烯醇辅助剂及其制备方法
    • US07598320B2
    • 2009-10-06
    • US10550110
    • 2004-03-18
    • Masato NishikawaKiyohisa Takahashi
    • Masato NishikawaKiyohisa Takahashi
    • C08F16/00C08F8/00C08F6/00C08L29/00G03F7/40
    • G03F7/40C08F8/28C08F8/30C08F8/44C08F2810/20C08F16/06
    • A modified polyvinyl alcohol (PVA) protected with a protecting group of the present invention is one wherein an amount of high-molecular weight body components of the modified polyvinyl alcohol having a weight-average molecular weight of 250,000 or more as determined by polyethylene glycol standards according to a gel permeation chromatography is 1000 ppm or less in the modified polyvinyl alcohol. The modified PVA is prepared by removing a metal ion and an acid from the modified PVA such as acetalized PVA with ion exchange treatment and then heat-treating at 80° C. or higher. An auxiliary for fine pattern formation of the present invention comprises the aforementioned modified PVA, a water-soluble crosslinking agent, and water or a mixed solvent of water and a water-soluble organic solvent. The auxiliary for fine pattern formation is applied over a resist pattern 3 and a coated layer 4 is formed thereon. Then the resist pattern 3 and the coated layer 4 are heated and thereby an acid is diffused from the resist pattern 3 to the coated layer 4. As a result, the coated layer in the vicinity of the resist pattern surface is crosslinked and cured by the diffused acid. The coated layer is developed to form a hole pattern having crosslinked and cured layer on the resist pattern, of which the hole size is less than a limit resolution of the wavelength of a light-exposure and which have no development defects.
    • 用本发明的保护基保护的改性聚乙烯醇(PVA)是其中通过聚乙二醇标准测定的改性聚乙烯醇的重均分子量为25万以上的高分子量体成分的量 根据凝胶渗透色谱在改性聚乙烯醇中为1000ppm以下。 通过离子交换处理从改性PVA如缩醛化PVA中除去金属离子和酸,然后在80℃或更高温度下进行热处理制备改性PVA。 本发明的精细图案形成用辅助剂包括上述改性PVA,水溶性交联剂,水或水和水溶性有机溶剂的混合溶剂。 在抗蚀剂图案3上施加用于精细图案形成的辅助件,并且在其上形成涂层4。 然后加热抗蚀剂图案3和涂层4,从而将抗蚀剂图案3的酸扩散到涂层4.结果,抗蚀剂图案表面附近的涂层被交联并固化 扩散酸。 显影涂层以在抗蚀剂图案上形成具有交联和固化层的孔图案,其孔尺寸小于曝光波长的极限分辨率并且没有显影缺陷。