System and method for stress and stability related measurements in boreholes
February 8, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod for selectively orienting induced fractures in subterranean earth formations Process for direct measurement of the orientation of hydraulic fractures Method of determining the orientation of hydraulic fractures in the earth Method of determining subterranean formation fracture orientation Method of measuring crustal stress by hydraulic fracture based on analysis of crack growth in rock Method of determining position and dimensions of a subsurface structure intersecting a wellbore in the earth Method of fracturing horizontal wells Methods for design and analysis of subterranean fractures using net pressures Method for optimizing hydraulic fracturing through control of perforation orientation Method for controlling sand production of formations and for optimizing hydraulic fracturing through perforation orientation InventorsAssigneeApplicationNo. 10071880 filed on 02/08/2002US Classes:702/1, MEASUREMENT SYSTEM IN A SPECIFIC ENVIRONMENT166/250.1, Fracturing characteristic166/308.1, Fracturing (EPO)73/783, Deformation or change in stress after fracture, cutting, or boring367/35, Borehole or casing condition702/12, Fluid flow investigation166/255.2Tool orientingExaminersPrimary: Barlow, JohnAssistant: Taylor, Victor J. Attorney, Agent or FirmInternational ClassE21B 4326AbstractA system and method for the measurement of the stresses and pressure perturbations surrounding a well, and a system for computing the optimum location for initiating a hydraulic stress fracture. The technique includes using sensors attached to the wellbore casing connected to a data analyzer. The analyzer is capable of analyzing the stresses on the well system. Using an inverse problem framework for an open-hole situation, the far field stresses and well departure angle are determined once the pressure perturbations and stresses are measured on the wellbore casing. The number of wellbore measurements needed for the inverse problem solution also is determined. The technique is also capable of determining the optimal location for inducing a hydraulic fracture, the effect of noisy measurements on the accuracy of the results, and assessing the quality of a bond between a casing and a sealant.Other References
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