Patents by Inventor Nalin Weerasinghe

Nalin Weerasinghe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Toolstring Communication in Cable Telemetry
    Publication number: 20140152457
    Abstract: Systems and methods for toolstring communication in cable telemetry. The methods involve positioning a cable telemetry system in a wellbore. The cable telemetry system can include a surface modem, a downhole toolstring of downhole tools, a downhole modem operatively coupled to the downhole toolstring, a cable operatively coupling between the surface modem and the downhole modem, and a surface data routing module that polls and trains the cable telemetry system. The methods also involve performing a pre-transmission poll of a rate requirement for the downhole toolstring and a telemetry type for the downhole modem, applying a training phase to establish a transmission link between the surface modem and the downhole modem, configuring data obtained by the downhole toolstring for an uplink via the transmission link, and transmitting the uplink via the transmission link.
    Type: Application
    Filed: December 4, 2012
    Publication date: June 5, 2014
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: Hiromasa Nishisaka, Takeaki Nakayama, Milos Milosevic, Eric Jeanson, Nalin Weerasinghe, Kun Wang, Yuichi Kobayashi, Motohiro Nakanouchi, David Santoso, Alex Olson
  • Methods and systems for borehole telemetry
    Patent number: 8446291
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over two or more data communication channels, wherein the transferred data comprises coding at a transmitter to increase the signal to noise ratio (SNR) of the data.
    Type: Grant
    Filed: May 17, 2012
    Date of Patent: May 21, 2013
    Assignee: Schlumberger Technology Corporation
    Inventor: Nalin Weerasinghe
  • Methods and systems for borehole telemetry
    Patent number: 8362916
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over one or more data communication channels utilizing at least one telemetry scheme selected from a plurality of telemetry schemes based on at least one downhole parameter.
    Type: Grant
    Filed: February 3, 2010
    Date of Patent: January 29, 2013
    Assignee: Schlumberger Technology Corporation
    Inventors: Theodorus Tjhang, Yuichi Kobayashi, David Santoso, Nalin Weerasinghe, Motohiro Nakanouchi
  • METHODS AND SYSTEMS FOR BOREHOLE TELEMETRY
    Publication number: 20120229293
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over two or more data communication channels, wherein the transferred data comprises coding at a transmitter to increase the signal to noise ratio (SNR) of the data.
    Type: Application
    Filed: May 17, 2012
    Publication date: September 13, 2012
    Inventor: NALIN WEERASINGHE
  • Methods and systems for borehole telemetry
    Patent number: 8217802
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over two or more data communication channels, wherein the transferred data comprises coding at a transmitter to increase the signal to noise ratio (SNR) of the data.
    Type: Grant
    Filed: February 3, 2009
    Date of Patent: July 10, 2012
    Assignee: Schlumberger Technology Corporation
    Inventor: Nalin Weerasinghe
  • METHODS AND SYSTEMS FOR BOREHOLE TELEMETRY
    Publication number: 20100194587
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over two or more data communication channels, wherein the transferred data comprises coding at a transmitter to increase the signal to noise ratio (SNR) of the data.
    Type: Application
    Filed: February 3, 2009
    Publication date: August 5, 2010
    Applicant: Schlumberger Technology Corporation
    Inventor: NALIN WEERASINGHE
  • Methods and systems for borehole telemetry
    Publication number: 20100194586
    Abstract: Methods and systems for borehole telemetry utilizing a tool configured or designed for deployment in a borehole traversing a subterranean formation. The tool includes a downhole telemetry module; a surface telemetry module; and a datalink between the downhole and surface modules configured or designed for transferring data over one or more data communication channels utilizing at least one telemetry scheme selected from a plurality of telemetry schemes based on at least one downhole parameter.
    Type: Application
    Filed: February 3, 2010
    Publication date: August 5, 2010
    Applicant: SCHLUMBERGER TECHNOLOGY CORPORATION
    Inventors: THEODORUS TJHANG, YUICHI KOBAHASHI, DAVID SANTOSO, NALIN WEERASINGHE, MOTOHIRO NAKANOUCHI