公开(公告)号：US10408697B2

公开(公告)日：2019-09-10

申请号：US15392615

申请日：2016-12-28

Applicant: Schlumberger Technology Corporation

Inventor： Kai Hsu ,  Scott C. Cook ,  Daniel Schulz ,  Gregory Au ,  Samuel P. Subbarao ,  Abhishek Agarwal ,  Ashers Partouche

IPC: G01L5/04 ,  E21B17/00

Abstract: Techniques for improving implementation of a downhole tool string to be deployed in a borehole formed in a sub-surface formation. In some embodiments, a design device determines a model that describes expected relationship between properties of the downhole tool string, the borehole, the sub-surface formation, and mud cake expected to be formed in the borehole; determines calibration locations along the borehole based on properties of the borehole; determines candidate spacer configurations based on contact force expected to occur at contact points between the downhole tool string and the mud cake when deployed with each of the candidate spacer configuration via the model; and determines a final spacer configuration to be used to attach one or more spacers along the downhole tool string based on expected head tension to move the downhole tool string when deployed in the borehole with each of the candidate spacer configurations via the model.

公开(公告)号：US20180181700A1

公开(公告)日：2018-06-28

申请号：US15392615

申请日：2016-12-28

Applicant: Schlumberger Technology Corporation

Inventor： Kai Hsu ,  Scott C. Cook ,  Daniel Schulz ,  Gregory Au ,  Samuel P. Subbarao ,  Abhishek Agarwal ,  Ashers Partouche

IPC: G06F17/50 ,  E21B17/10 ,  E21B19/00 ,  E21B41/00 ,  G01L5/04

CPC classification number: G01L5/04 ,  E21B17/00

Abstract: Techniques for improving implementation of a downhole tool string to be deployed in a borehole formed in a sub-surface formation. In some embodiments, a design device determines a model that describes expected relationship between properties of the downhole tool string, the borehole, the sub-surface formation, and mud cake expected to be formed in the borehole; determines calibration locations along the borehole based on properties of the borehole; determines candidate spacer configurations based on contact force expected to occur at contact points between the downhole tool string and the mud cake when deployed with each of the candidate spacer configuration via the model; and determines a final spacer configuration to be used to attach one or more spacers along the downhole tool string based on expected head tension to move the downhole tool string when deployed in the borehole with each of the candidate spacer configurations via the model.

公开(公告)号：US10125545B2

公开(公告)日：2018-11-13

申请号：US14975694

申请日：2015-12-18

Applicant: Schlumberger Technology Corporation

Inventor： Kai Hsu ,  Fei Song ,  Weiming Lan ,  Derek Copold ,  Nathan Landsiedel ,  Arvind Battula ,  Daniel Schulz ,  Sashank Vasireddy

IPC: E21B41/00 ,  G05B19/4099 ,  E21B47/00 ,  E21B4/18 ,  E21B49/08 ,  E21B49/00

Abstract: A manufacturing system that manufactures a downhole tool string, which includes a model that describes relationship between properties of the downhole tool string, properties of a borehole, properties of a formation, and properties of a mud cake formed on a surface of the borehole and a design device that iteratively determines contact parameters that describe one or more contact points expected between the downhole tool string and the mud cake based at least in part on the model, in which the contact parameters comprise contact force expected at each of the contact points, adjusts the properties of the downhole tool string to add a spacer at one of the contact points associated with highest contact force, and indicates location, type, or both of the spacer to enable the manufacturing system to attach the spacer to the downhole tool string before deployment of the downhole tool string in the borehole.