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    • 5. 发明授权
    • Squeeze cementing method for wells
    • 挤压固井方法
    • US5332037A
    • 1994-07-26
    • US976602
    • 1992-11-16
    • Joseph H. SchmidtLamar L. GanttWilliam H. Smalstig
    • Joseph H. SchmidtLamar L. GanttWilliam H. Smalstig
    • C04B28/02C09K8/46C09K8/473E21B33/138E21B33/14
    • C04B28/02C09K8/46C09K8/473E21B33/138C04B2111/00706
    • Perforation tunnels and other voids or spaces in earth formations in communication with wells are sealed more effectively by injecting and pre-packing resin-coated particulates (sand) into such tunnels or voids and allowing the sand to consolidate to form a substantially rigid, permeable mass. A lead slurry of relatively fine grained cement is then injected to fill the interstices formed in the permeable material occupying the tunnels or voids. A larger or more coarse grain cement is then injected to form a substantially impermeable, rigid filter cake at the interface of the wellbore and the permeable mass to prevent loss of cement slurry out of the tunnels or voids before the cement is set. Vertical and deviated or generally horizontal wellbores having perforation tunnels or voids which suffer unwanted cement drainage prior to setting of conventional oil well cements are more effectively sealed by the sequential injection of the permeable material followed by injection of settable cement slurries.
    • 通过将树脂涂覆的颗粒(砂)注入和预填充到这样的隧道或空隙中并允许砂固结以形成基本刚性的可渗透质量块,更有效地密封与井连通的地层中的穿孔和其它空隙或空间 。 然后注入相对细粒度水泥的铅浆,以填充形成在占据隧道或空隙的可渗透材料中的间隙。 然后注入较大或更粗的谷物水泥,以在井眼和渗透物质的界面处形成基本上不可渗透的刚性滤饼,以防止水泥浆在水泥凝结之前从隧道或空隙中流失。 在固定常规油井水泥之前遭受不需要的水泥排水的穿孔或空隙的垂直和偏斜或大体水平的井筒通过连续注入可渗透材料,然后注入可固化的水泥浆更有效地被密封。