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公开(公告)号：US5676213A
公开(公告)日：1997-10-14
申请号：US630739
申请日：1996-04-10
摘要： A portion of a borehole wall is isolated from surrounding borehole fluids by placing a chamber of a borehole tool against the borehole wall. The chamber comprises a cylindrical recess in an exterior surface of the borehole tool. The recess is open at one end to receive borehole fluids, and closed at the opposite end by a concave ultrasonic acoustic transducer. Mudcake present within the chamber and on the isolated portion of the borehole wall is disintegrated by the concave ultrasonic transducer. This approach can be used to remove mudcake from a borehole wall with a moving or stationary borehole tool.
摘要翻译： 通过将钻孔工具的腔室放置在钻孔壁上，将井壁的一部分与周围的钻孔流体隔离。 该腔室包括在钻孔工具的外表面中的圆柱形凹部。 凹口在一端开口以接收井眼流体，并且在相对端由凹形超声波声换能器封闭。 存在于室内和井壁的隔离部分上的泥饼由凹形超声换能器分解。 这种方法可以用移动或固定的钻孔工具从井壁去除泥饼。
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公开(公告)号：US5969241A
公开(公告)日：1999-10-19
申请号：US632370
申请日：1996-04-10
摘要： An earth formation tool measures pressure from within a borehole. A portion of the borehole wall is isolated from surrounding borehole fluids by placing a chamber of a borehole tool against the borehole wall. The chamber comprises a recess in an exterior surface of a borehole tool. Mudcake present on the isolated portion of the borehole wall is disintegrated by an ultrasonic transducer within the chamber. In this manner, there is no resistance to fluid flow from the chamber to the formation. A pressure gauge measures pressure of the chamber to indicate pressure of the earth formation. This approach can be used to make moving or stationary measurements of earth formation pressure.
摘要翻译： 地层形成工具可测量钻孔内的压力。 通过将井眼工具的腔室放置在钻孔壁上，将井壁的一部分与周围的钻孔流体隔离。 该室包括在钻孔工具的外表面中的凹部。 存在于钻孔壁隔离部分的泥饼由室内的超声换能器分解。 以这种方式，不存在从室到地层的流体流动阻力。 压力表测量室的压力以指示地层的压力。 这种方法可用于对地层压力进行移动或固定测量。
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公开(公告)号：US5663559A
公开(公告)日：1997-09-02
申请号：US483137
申请日：1995-06-07
CPC分类号： G01V8/02 , E21B47/0002 , E21B47/101 , E21B47/102 , E21B49/10
摘要： Images of rock formations below the earth's surface can be obtained on a microscopic scale. A borehole tool uses a seal to isolate an interval of the formation from borehole fluids which are outside the seal. A probe of the tool engages a wall of the formation and then draws formation fluid from the formation into the interior of the tool. The tool then produces an optical image of the formation which indicates rock texture. The seal can comprise a pad, inflatable packers, compressional packers, or cement plugs. The images of the formation can be obtained with electro-optic imagers such as charge-coupled devices (CCD) or a camera operating in the visible and/or near infrared range, or with ultrasonic transducers operating in the sub-MHz to mid GHz range, for example. The near infrared range provides an optical image of the formation through opaque fluids such as oil based muds or oil itself.
摘要翻译： 可以在微观尺度上获得地球表面以下的岩层图像。 钻孔工具使用密封来隔离地层与密封件外面的井眼流体的间隔。 工具的探头与地层的壁接合，然后将地层流体从地层中吸入工具的内部。 然后该工具产生指示岩石纹理的地层的光学图像。 密封件可以包括垫，充气封隔器，压缩封隔器或水泥塞。 可以使用诸如电荷耦合器件（CCD）或在可见光和/或近红外范围内操作的相机的电光成像器，或者在子MHz至中频范围内工作的超声波换能器来获得地层的图像 ， 例如。 近红外范围通过不透明液体（例如油基泥浆或油本身）提供地层的光学图像。
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