Method of freeing stuck drill pipe
    2.
    发明授权
    Method of freeing stuck drill pipe 失效
    释放卡住钻杆的方法

    公开(公告)号:US06845818B2

    公开(公告)日:2005-01-25

    申请号:US10425512

    申请日:2003-04-29

    IPC分类号: E21B31/00 E21B33/13

    CPC分类号: E21B31/005

    摘要: Disclosed is an auxiliary method for freeing a drill pipe stuck due to build up of filter cake, which provides a reduction in the amount of force required to free said pipe which comprises: a) Lowering an ultrasonic horn type device down the drill pipe to the point of contact between said drill pipe and mud filter cake; b) Producing ultrasonic energy at the point of contact until the contact area is sufficiently reduced such that substantially less force is required to free the pipe.

    摘要翻译: 公开了一种辅助方法,用于释放由于堆积的滤饼而卡住的钻杆,其减少了释放所述管所需的力的量,其包括:a)将超声波喇叭型装置从钻杆下降到 所述钻杆和泥浆滤饼之间的接触点; b)在接触点处产生超声能量,直到接触面积被充分地减小,使得需要基本上较小的力来释放管道。

    Copolymerization of polyetherpolyols with epoxy resins
    7.
    发明授权
    Copolymerization of polyetherpolyols with epoxy resins 失效
    聚醚多元醇与环氧树脂的共聚

    公开(公告)号:US5756639A

    公开(公告)日:1998-05-26

    申请号:US666763

    申请日:1996-06-19

    摘要: A method for producing an epoxy polyetherpolyol having 15 to 75 wt. % epoxy comprising heating a polyol and catalyst to initiate condensation, removing water, introducing sufficient epoxy into the reaction mixture to give 15 to 75 wt. % epoxy in the product. Generally, between 0.5 and 1.19 moles of water per mole of polyol are removed. In one embodiment at least 95 wt. % of all of the polyol is introduced initially into the reaction zone. In another embodiment the condensation is terminated prior to 93 percent completion. Also provided are novel compositions suitable for drilling fluids, adhesives and coatings.

    摘要翻译: 一种制备15〜75重量%的环氧聚醚多元醇的方法, %环氧化物,包括加热多元醇和催化剂以引发缩合,除去水,将足够的环氧化合物引入反应混合物中,得到15至75wt。 %环氧树脂在产品中。 通常,每摩尔多元醇除去0.5-1.19摩尔水。 在一个实施方案中,至少95wt。 所有的多元醇的百分数最初被引入反应区。 在另一个实施方案中,在完成93%之前终止冷凝。 还提供适用于钻井液,粘合剂和涂料的新型组合物。