Iodinated X-ray contrast media
    2.
    发明授权
    Iodinated X-ray contrast media 失效
    碘化X射线造影剂

    公开(公告)号:US5958376A

    公开(公告)日:1999-09-28

    申请号:US793927

    申请日:1997-06-27

    摘要: The invention provides iodinated bis phenyl compounds, useful as X-ray contrast agents, of formula (I) (wherein each C.sub.6 R.sub.5 moiety may be the same or different; each denotes a hydrogen or iodine atom or a group M, two or three non-adjacent R groups on each C.sub.6 R.sub.5 moiety denoting iodine atoms and one, two or three R groups on each C.sub.6 R.sub.5 moiety denoting M groups; X denotes a group providing a 1, 2 or 3 atom chain linking the two C.sub.6 R.sub.5 groups, preferably where X is or contains in the bridging chain a carbonyloxy group each C.sub.6 R.sub.5 group being a triodophenyl group or a group in which each R is other than hydrogen; and each M is independently a non-ionic hydrophilic moiety, M preferably being a non-ionic hydrophilic moiety comprising a monohydroxy- or polyhydroxy-alkyl group) and isomers, especially stereoisomers and rotamers, thereof. ##STR1##

    摘要翻译: PCT No.PCT / GB95 / 02264 Sec。 371日期:1997年6月27日 102(e)日期1997年6月27日PCT提交1995年9月22日PCT公布。 公开号WO96 / 09285 日期:1996年3月28日本发明提供了可用作式(I)的X射线造影剂的碘化双苯基化合物(其中每个C 6 R 5部分可以相同或不同;各自表示氢或碘原子或基团M, 每个C6R5部分上两个或三个不相邻的R基团,表示碘原子,每个C6R5部分上含有一个,两个或三个R基团,表示M基团; X表示提供连接两个C 6 R 5基团的1,2或3个原子链的基团, 优选其中X是桥连环中或在桥连环中含有碳氧基,每个C 6 R 5基团是三苯基或每个R不是氢的基团;每个M独立地是非离子亲水部分,M优选是非离子亲水部分, 包含单羟基或多羟基 - 烷基的离子亲水部分)和异构体,特别是立体异构体和旋转异构体。

    Method for prudent penetration of a casing through sensible overburden
or sensible structures
    3.
    发明授权
    Method for prudent penetration of a casing through sensible overburden or sensible structures 失效
    通过明智的上覆或明智的结构来审慎地穿透套管的方法

    公开(公告)号:US4765416A

    公开(公告)日:1988-08-23

    申请号:US869697

    申请日:1986-06-02

    摘要: In a subterranean drilling operation, a drill stem and drill bit are advanced downwardly while conducting compressed air downwardly through the drill stem. A minor part of the air flow is discharged from the drill bit downwardly against the sensible overburden, and a major part of the air flow is discharged upwardly through passages in the drill stem. A casing is disposed around the drill stem and advanced therewith so that the sensible overburden is shielded from the air discharged from the upwardly directed passages. The upwardly directed passages contain removable inserts which can be exchanged for different inserts in order to vary the amount of air discharged from the upwardly directed passages, and thereby vary the amount of air discharged downwardly from the drill bit against the overburden. In that way, the amount of air acting against the overburden can be adapted to the type of material in the overburden in order to control the amount of disruption to the overburden.

    摘要翻译: 在地下钻井操作中,钻杆和钻头向下推进,同时将压缩空气向下通过钻杆。 空气流的一小部分从钻头向下排放到明显的覆盖层上,空气流的主要部分通过钻杆中的通道向上排出。 壳体围绕钻杆杆设置并向前推进,使得明显的覆盖层与从向上引导的通道排出的空气相隔离。 向上引导的通道包含可移除的插入物,其可以更换为不同的插入物,以便改变从向上引导的通道排出的空气量,从而改变从钻头向下从上覆盖层向下排出的空气量。 以这种方式,作用于上覆岩层的空气量可以适应于上覆岩层中的材料类型,以便控制上覆岩层的破坏量。