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公开(公告)号：US20220228476A1
公开(公告)日：2022-07-21
申请号：US17654857
申请日：2022-03-15
发明人： Marc Ernest WILLERTH , Stefan MAUS
IPC分类号： E21B47/092 , E21B44/06 , E21B47/024 , E21B7/04 , E21B47/04 , G01V3/00
摘要： A method of validating a directional survey includes measuring the gravity and magnetic field vectors using a surveying tool and computing an overall statistical distance of the measurement. The statistical distance may be calculated from reference values associated with the surveying tool using corresponding surveying tool codes with error values. In a further aspect, an error covariance matrix may be used to determine whether the new errors in a survey are consistent or not with errors from one or more previous surveys.
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公开(公告)号：US20220325616A1
公开(公告)日：2022-10-13
申请号：US17808527
申请日：2022-06-23
IPC分类号： E21B47/022 , E21B47/024 , E21B47/04 , E21B7/04 , E21B44/00
摘要： A method of drilling a wellbore to a target includes measuring attitudes at two adjacent survey stations along a wellbore using a downhole surveying tool. An actual change in wellbore position over a survey leg linking the two survey stations is determined. Corrections are applied to the measured attitude at one or both of the survey stations such that a modeled well path joining the survey stations reflects the determined actual change in wellbore positon between the two survey stations.
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公开(公告)号：US20220349296A1
公开(公告)日：2022-11-03
申请号：US17811375
申请日：2022-07-08
IPC分类号： E21B47/022 , E21B47/024 , E21B47/04 , E21B7/04 , E21B44/00
摘要： A system and method of drilling a wellbore to a target may include measuring attitudes at two adjacent survey stations along a wellbore using a downhole surveying tool. An actual change in wellbore position over a survey leg linking the two survey stations may be determined. Corrections may be applied to the measured attitude at one or both of the survey stations such that an estimated well path joining the survey stations indicates the determined actual change in wellbore position between the two survey stations.
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公开(公告)号：US20190169977A1
公开(公告)日：2019-06-06
申请号：US16097788
申请日：2017-05-11
IPC分类号： E21B47/022 , E21B7/04
摘要： A method of drilling a wellbore to a target includes measuring attitudes at two adjacent survey stations along a wellbore using a downhole surveying tool. An actual change in wellbore position over a survey leg linking the two survey stations is determined. Corrections are applied to the measured attitude at one or both of the survey stations such that a modeled well path joining the survey stations reflects the determined actual change in wellbore positon between the two survey stations.
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