Schlumberger Technology Corporation

Dhananjay Ramaswamy

Brian Oliver Clark

Mark T Frey

Anthony Louis Collins

David L Smith

Stephen D Bonner

John F Hunka

Martin G Lüling

Martin G L&uuml;ling

Systems and methods for downhole communication and measurement utilizing an improved metallic tubular having an elongated body with tubular walls and a central bore adapted to receive a run-in tool. The tubular including slotted stations to provide through-tubular signal transmission and/or reception. Hydraulic isolation between the interior and exterior of the tubular is provided by pressure barrier means at the slotted stations. Sensors and/or sources are mounted on the run-in tool, which is adapted for transmission through a drill string to engage within the tubular in alignment with the slotted stations. A run-in tool configuration includes a modulator for real-time wireless communication with the surface and/or remote downhole tools. A tubular and run-in tool configuration also includes inductive couplers for wireless signal data transfer. A method for measuring a formation characteristic utilizing a run-in tool adapted with an interchangeable end segment for multi-mode downhole transport. Methods for sealing an opening on the surface of a tubular having an elongated body with tubular walls and a central bore.

Retrievable formation resistivity tool

Methods for sealing openings in tubulars

Downhole tubular with openings for signal passage

Inductively-coupled system for receiving a run-in tool

Systems and methods for monitoring a characteristic of a subterranean hydrocarbon reservoir and for placing a borehole in the vicinity of a well in an earth formation. New well completion systems with slotted stations are utilized to provide through-casing signal-transmission and/or reception. Hydraulic isolation between the interior and the exterior of the completion is provided by pressure barrier means at the slotted stations. The completions permit temporary or permanent monitoring of changes in reservoir saturation with the use of mobile sources/sensors. The completions also form part of a system for accurately placing a well within a desired distance and orientation relative to an existing well.

System and method for making an opening in a subsurface tubular for reservoir monitoring

System and method for monitoring a reservoir and placing a borehole using a modified tubular

Method and apparatus for downhole signal communication and measurement through a metal tubular

Growing community of inventors

Stafford, TX, United States of America

Dhananjay Ramaswamy