公开(公告)号：US5770798A

公开(公告)日：1998-06-23

申请号：US599337

申请日：1996-02-09

申请人： Daniel T. Georgi ,  John M. Michaels ,  Michael J. Moody

发明人： Daniel T. Georgi ,  John M. Michaels ,  Michael J. Moody

IPC分类号： E21B49/00 ,  E21B49/10

CPC分类号： E21B49/008 ,  E21B49/10

摘要： An apparatus and method for evaluating formation damage proximate to the surface of a rock. The invention is applicable to surface tests and to tests downhole in a borehole. A first hollow probe sealingly contacts the rock surface to define a first surface area, and the pressure within the hollow probe is decreased to monitor resulting pressure changes. A second hollow probe contacts the rock surface to define a second surface area having a different size than the first surface area, and the pressure within the hollow second probe is decreased to monitor resulting pressure changes. Differences in the observed pressure changes can be analyzed to evaluate formation damage to the rock surface and near surface. In particular, the thickness of formation damage, and permeability losses caused by such damage, can be assessed. Alternatively, fluid pressure can be injected into the first and second volumes to evaluate the subsequent pressure reduction.

摘要翻译： 一种用于评估靠近岩石表面的地层损伤的装置和方法。 本发明适用于井眼测试和井下测试。 第一中空探针密封地接触岩石表面以限定第一表面区域，并且减小中空探针内的压力以监测所产生的压力变化。 第二中空探针接触岩石表面以限定具有与第一表面区域不同的尺寸的第二表面区域，并且降低中空第二探针内的压力以监测所产生的压力变化。 可以分析观察到的压力变化的差异，以评估对岩石表面和近地表的地层损伤。 特别是，可以评估地层损伤的厚度和由这种损伤引起的渗透性损失。 或者，可以将流体压力注入第一和第二体积以评估随后的压力降低。

公开(公告)号：US5571962A

公开(公告)日：1996-11-05

申请号：US106368

申请日：1993-08-13

申请人： Daniel T. Georgi ,  Homer A. Robertson ,  Mark S. Franks

发明人： Daniel T. Georgi ,  Homer A. Robertson ,  Mark S. Franks

IPC分类号： E21B21/06 ,  E21B47/04 ,  E21B49/00

CPC分类号： E21B49/005 ,  E21B21/065 ,  E21B47/04

摘要： A method and apparatus for identifying cuttings from a wellbore is disclosed. The cuttings can be identified by measuring emissions such as alpha, beta, or gamma particles which emanate from the cuttings. A continuous wellbore profile of the alpha or beta emissions can be constructed by measuring the emissions from cuttings taken from different locations in the wellbore, and by documenting such emissions. The effects of cuttings dispersion caused by differing particle sizes can be reduced by collecting cuttings of an intermediate size for analysis. The profile of the intermediate size cuttings can be compared with a well log to identify the original elevation of the cuttings within the wellbore.

摘要翻译： 公开了一种用于从井眼识别切屑的方法和设备。 可以通过测量排放物来识别切屑，例如从切屑发出的α，β或γ粒子。 可以通过测量从井眼不同位置取得的切屑的排放量以及通过记录这种排放来构建α或β排放的连续井筒剖面。 通过收集用于分析的中等尺寸的切屑可以减少由不同粒径引起的切屑分散的影响。 可以将中等尺寸切屑的轮廓与井测井进行比较，以确定井眼内的切屑的原始高程。

公开(公告)号：US5509303A

公开(公告)日：1996-04-23

申请号：US386948

申请日：1995-02-10

申请人： Daniel T. Georgi

发明人： Daniel T. Georgi

IPC分类号： E21B47/00 ,  E21B47/01 ,  E21B47/06 ,  G01N9/26

CPC分类号： E21B47/01 ,  E21B47/00 ,  E21B47/06 ,  G01N9/26

摘要： The present invention is a differential pressure fluid density instrument comprising a housing having a plurality of ports positioned at spaced-apart locations along the housing, a differential pressure transducer, and a valve adapted to selectively connect the transducer across two predetermined one of the plurality of ports. The valve may comprise a three-way solenoid actuated valve. Fluid expansion wells are each connected at one end to a port and prevent wellbore fluids from reaching the differential pressure transducer. The housing includes an inner chamber filled with liquid which may be silicon oil. The chamber includes a standpipe which extends from near the bottom of the chamber, where it is in communication with a lower port, to the top of the chamber. Communication between the chamber and wellbore through the standpipe enables the housing and components disposed within the chamber to be constructed without the need to withstand high differential pressures.

摘要翻译： 本发明是一种差压流体密度仪，其包括壳体，该壳体具有沿着壳体位于间隔开的位置的多个端口，差压传感器和适于选择性地将换能器连接到多个 港口。 阀可以包括三通电磁致动阀。 流体膨胀孔的一端各自连接到端口，并防止井筒流体到达差压传感器。 壳体包括填充有可以是硅油的液体的内室。 该腔室包括从腔室的底部附近延伸到其与下部端口连通的立管到腔室的顶部。 通过竖管之间的腔室和井眼之间的通信使得能够构造设置在腔室内的壳体和部件，而不需要承受高压差。

公开(公告)号：US5439065A

公开(公告)日：1995-08-08

申请号：US314247

申请日：1994-09-28

申请人： Daniel T. Georgi

发明人： Daniel T. Georgi

IPC分类号： E21B25/06 ,  E21B49/06 ,  E21B49/00

CPC分类号： E21B25/06 ,  E21B49/06

摘要： The invention is an apparatus for rotary drilling of core samples from the wall of a wellbore. The apparatus comprises a coring bit, a motor, a bit box rotatably mounted within a housing adapted to traverse the wellbore, a plunger for extracting the core sample from the bit and discharging the core sample into a storage barrel which has a sponge liner. The sponge liner in the barrel adsorbs liquid hydrocarbons which may be expelled from the porosity in the core sample by gas exsolution.

摘要翻译： 本发明是用于从井眼的壁旋转钻探岩心样品的装置。 该装置包括取芯钻头，电动机，可旋转地安装在适于穿过井筒的壳体内的钻头箱，用于从钻头中取出芯样品并将芯样品排放到具有海绵衬垫的储存桶中的柱塞。 桶中的海绵衬里吸附液体烃，其可以通过气体溶出从芯样品中的孔隙中排出。