公开(公告)号：US20200340358A1

公开(公告)日：2020-10-29

申请号：US16927035

申请日：2020-07-13

Applicant: Schlumberger Technology Corporation

Inventor： Arun Sharma ,  Tudor Ioan Palaghita ,  Ashers Partouche

IPC: E21B49/10 ,  E21B47/06 ,  G01N1/14 ,  G01L19/00 ,  G01L19/14

Abstract: A pressure testing module separable from and configured to be coupled with a tool base that is to be coupled along a downhole tool string to be conveyed within a wellbore extending into a subterranean formation. The pressure testing module includes a chamber and a piston assembly slidably disposed within the chamber, thus dividing the chamber into a first chamber portion and a second chamber portion. The piston assembly is operable to move in response to hydraulic fluid being pumped into the first chamber portion and to draw formation fluid of the wellbore into the second chamber portion in response to the movement of the piston assembly.

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：US20170152743A1

公开(公告)日：2017-06-01

申请号：US14956338

申请日：2015-12-01

Applicant: Schlumberger Technology Corporation

Inventor： Adriaan Gisolf ,  Kai Hsu ,  Yong Chang ,  Youxiang Zuo ,  Ryan Sangjun Lee ,  Ashers Partouche

IPC: E21B49/08 ,  G01N1/14 ,  E21B49/10

CPC classification number: E21B49/081 ,  E21B47/12 ,  E21B49/10 ,  E21B2049/085 ,  G01N1/14

Abstract: A method includes operating a downhole acquisition tool including a guard probe and a sample probe in a wellbore that contains a fluid that includes a native reservoir fluid and a contaminant. The method also includes receiving a first portion of fluid into the guard probe and a second portion of fluid into the sample probe, estimating a contamination level of the first or second portions based on a fluid property of the respective first and second portions, determining an initial guard flow rate of the first portion, determining an initial sample flow rate of the second portion, using a processor to adjust a guard flow rate of the second portion over pump time after the contamination level of the first portion is at or below a contamination level threshold, and adjust a sample flow rate of the first portion based on the adjusted guard flow rate and total flowrate.