公开(公告)号：US20180220380A1

公开(公告)日：2018-08-02

申请号：US15419544

申请日：2017-01-30

Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION

Inventor： Arnaud Croux ,  Julius Kusuma ,  Stephane Vannuffelen

IPC: H04W52/24 ,  H04L5/00 ,  H04W40/00 ,  H04W56/00

CPC classification number: H04W52/244 ,  H04B2215/061 ,  H04L5/0055 ,  H04L5/1469 ,  H04L27/00 ,  H04W40/005 ,  H04W56/002 ,  Y02D70/00

Abstract: An acoustic network is located in a formation traversed by a borehole having a pipe contained therein. The acoustic network includes a backbone network having a number of backbone modems engaging the pipe and acoustically communicating along the pipe using a first modulation technique. A number of end node modems acoustically communicate using a second modulation technique orthogonal to the first modulation technique. At least one of the backbone modems is a bridge hub modem that is coupled to both the backbone network and an end node modem and communicates with the backbone network using the first modulation technique and with the end node modem using the second modulation technique. The end node modems may have a hibernation mode defined by low energy usage with no transmission or receipt of data, and a transmission mode defined by transmission of data by the end node modem.

公开(公告)号：US20180003043A1

公开(公告)日：2018-01-04

申请号：US15620703

申请日：2017-06-12

Applicant: Schlumberger Technology Corporation

Inventor： Andriy Gelman ,  Julius Kusuma ,  Luis Eduardo DePavia ,  Arnaud Croux

IPC: E21B47/12 ,  G01V11/00 ,  E21B49/00

CPC classification number: G01V11/002 ,  E21B47/121

Abstract: A method for improving a quality of data received from a downhole tool in a wellbore includes receiving a first block of data from a downhole tool in a wellbore. The first block of data represents a first measurement captured by the downhole tool during a first period of time. At least a portion of a bit budget for a second block of data is allocated to the first block of data to produce an updated first block of data. The method also includes receiving the second block of data from the downhole tool in the wellbore. The second block of data represents a second measurement captured by the downhole tool during a second period of time.

公开(公告)号：US20160047236A1

公开(公告)日：2016-02-18

申请号：US14818270

申请日：2015-08-04

Applicant: Schlumberger Technology Corporation

Inventor： Arnaud Croux

IPC: E21B47/16

CPC classification number: E21B47/16 ,  H04B11/00

Abstract: An acoustic communications network includes acoustic modems that exchange messages on an acoustic communications medium, such as tubing deployed in a wellbore. The acoustic communications medium is characterized by an acoustic transfer function having a plurality of passbands and a plurality of stopbands. The messages are communicated by encoding the message into a plurality of symbols representing the message and distributing the plurality of symbols across a bandwidth of a wideband acoustic signal that spans at least one passband and at least one stopband of the acoustic transfer function.