Shyam B Mehta

US Patent:

7913773, Mar 29, 2011

Filed:

Aug 3, 2006

Appl. No.:

11/498845

Inventors:

Qiming Li - Sugar Land TX, US
Brian Clark - Sugar Land TX, US
Shyam B. Mehta - Missouri City TX, US
Remi Hutin - New Ulm TX, US
Christopher P. Reed - West University Place TX, US
David Santoso - Sugar Land TX, US
Lise Hvatum - Katy TX, US
Raghu Madhavan - Houston TX, US
Jean-Marc Follini - Houston TX, US
Geoffrey C. Downton - Minchinhampton, GB
Walter D. Aldred - Thriplow, GB

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 47/12

US Classification:

175 40, 175 24, 175 50, 3408544

Abstract:

The disclosure has application for use in conjunction with an operation of drilling an earth borehole using: a drilling rig, a drill string having its generally upper end mechanically coupleable with and suspendable from the drilling rig, and a bottom hole assembly adjacent the lower end the drill string, the bottom hole assembly including a drill bit at its lower end. A method is set forth for obtaining information about at least one parameter sensed at the bottom hole assembly, including the following steps: providing at least one measuring device in the bottom hole assembly, the at least one measuring device producing measurement data representative of a measured condition at the bottom hole assembly; providing an uphole processor system at the earth's surface; providing a drill string telemetry system coupled with the at least one measuring device and coupled with the uphole processor system; and transmitting the data from the measuring device to the uphole processor system via the drill string telemetry system.

US Patent:

8284073, Oct 9, 2012

Filed:

Apr 17, 2008

Appl. No.:

12/104578

Inventors:

Shyam B. Mehta - Missouri City TX, US
Wayne Phillips - Houston TX, US
Jean-Marc Follini - Houston TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 47/12
G01V 3/34

US Classification:

3408533, 3408537, 3408546

Abstract:

A system and method for communicating with a downhole tool is disclosed. In one embodiment, a telemetry system for communicating with a downhole tool in a wellbore includes a first electrode. A modulated electric current flows from the first electrode through a formation to the downhole tool. The telemetry system also includes a downlink box, which provides the modulated electric current to the first electrode. The downhole tool comprises a sensor unit, which detects the modulated electric current. The telemetry system includes a second electrode that allows the modulated electric current to return to the downlink box. The telemetry system also includes an uplink telemetry, wherein the uplink telemetry does not comprise electromagnetic telemetry. In some embodiments, the downlink may be operated while mud pumps are turned off. The downlink may also be operated while the downhole tool is sending uplink telemetry by a method other than electromagnetic current.

US Patent:

8362915, Jan 29, 2013

Filed:

Oct 30, 2009

Appl. No.:

12/609589

Inventors:

Shyam Mehta - Missouri City TX, US
Georgiy Bordakov - Richmond TX, US

Assignee:

Intelliserv, LLC - Houston TX

International Classification:

G01V 3/00

US Classification:

3408541, 175 24, 175 40, 175 51, 175 90, 175106, 702 6, 702 9

Abstract:

A system and a method for determining stretch or compression of a drill string is disclosed. Sensors are positioned along the drill string for collecting data for determining the stretch or compression. The stretch or the compression of the drill string may be used to calculate depths at which measurements are obtained by tools associated with the drill string.

US Patent:

8408330, Apr 2, 2013

Filed:

Apr 27, 2010

Appl. No.:

12/768382

Inventors:

Remi Hutin - New Ulm TX, US
Sandra Reyes - ISSy les Moulineaux, FR
Shyam B. Mehta - Missouri City TX, US
Jonna Flores - Sugar Land TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 47/18

US Classification:

175 40

Abstract:

Systems and methods cancel or compensate for an echo or noise in borehole communication. The systems and methods provide a downhole tool configured to provide borehole communication via mud pulse telemetry. The downhole tool pulses drilling fluid to generate a first pressure pulse and a second pressure pulse. The first pressure pulse moves upwardly with respect to the downhole component and is encoded with data associated a downhole measurement. A sensor is electrically connected to and in communication with the downhole tool. The first sensor is adapted to detect a characteristic of the second pressure pulse in the drilling mud. A ideal pressure pulse or a correction pressure pulse is generated by a downhole tool or a mud pulse modulator to reduce or cancel noise of the second pressure pulse.

US Patent:

8442769, May 14, 2013

Filed:

Nov 11, 2008

Appl. No.:

12/742514

Inventors:

Wayne J. Phillips - Houston TX, US
Georgiy Bordakov - Richmond TX, US
Alexander Kostin - Houston TX, US
Shyam Mehta - Missouri City TX, US
Denis Heliot - Missouri City TX, US
John C. Rasmus - Richmond TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 47/022

US Classification:

702 6, 702 7, 702 9, 702 10, 702 11, 7315201, 7315202, 1662414, 1662551, 175 24, 175 45

Abstract:

Various methods are disclosed, comprising obtaining a plurality of raw depth measurements for a wellbore; obtaining survey data about a bottom hole assembly; obtaining depth compensation information; calculating a plurality of compensated depth measurements from the raw depth measurements and the depth compensation information and one or more additional corrections for residual pipe compliance, tide, and rig heave; calculating sag angle and correcting the survey data with the sag angle; determining a high fidelity wellbore trajectory from the compensated depth measurements and the survey data; and then employing the high fidelity wellbore trajectory in various drilling, formation evaluation, and production and reservoir analysis applications. Depth compensation information may comprise at least one of weight on bit, a friction factor, temperature profile, borehole profile, drill string mechanical properties, hookload, and drilling fluid property. The surveys may include both static and continuous surveys.

US Patent:

8485264, Jul 16, 2013

Filed:

Mar 12, 2009

Appl. No.:

12/403184

Inventors:

Remi Hutin - Bures sur Yvette, FR
Shyam B. Mehta - Missouri City TX, US
Amandine Battentier - Fontenay Aux Roses, FR
Han Yu - Sugar Land TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 34/06
E21B 47/18

US Classification:

166373, 367 84

Abstract:

Methods and systems for pulse generation assembly that includes a plurality of staged valves operably coupled serially in a bottomhole assembly of a wellbore tool. The plurality of staged valves are operated in a substantially synchronized manner, thereby generating a series of pressure pulses. The signal strength of the generated pulse signal is multiplied by the number of staged valves in the series, and the pulse generation assembly of the disclosure is less susceptible to jamming, shock, and erosion. Further, by sequentially stopping at least one stage of the assembly and then synchronously rotating other stages, amplitude modulation is accomplished.

US Patent:

8544534, Oct 1, 2013

Filed:

Mar 12, 2010

Appl. No.:

12/722619

Inventors:

Ashers Partouche - Richmond TX, US
Harold Steven Bissonnette - Sugar Land TX, US
Shyam B. Mehta - Missouri City TX, US
Reza Taherian - Sugar Land TX, US
Gbenga Onadeko - Sugar Land TX, US
Shardul Sarhad - Stafford TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

E21B 47/00

US Classification:

166 651, 1662542, 166 66

Abstract:

A wellbore instrument system includes a pipe string extending from earth's surface to a selected depth in a wellbore. The pipe string includes at least one of an electrical conductor and an optical fiber signal channel. A power sub including an electric power source is coupled proximate a lower end of the pipe string. At least one electrically powered wireline configurable wellbore instrument is coupled to the power source in the sub.

US Patent:

8645571, Feb 4, 2014

Filed:

Aug 5, 2009

Appl. No.:

12/535793

Inventors:

Geoff Downton - Minchinhampton, GB
Clinton D. Chapman - Missouri City TX, US
Shyam B. Mehta - Missouri City TX, US

Assignee:

Schlumberger Technology Corporation - Sugar Land TX

International Classification:

G06F 15/16

US Classification:

709246, 709249, 709230, 3408533

Abstract:

A system and a method manage and use data related to a wellbore or a drill string. The system and the method may provide remote access to tools in a drill string using a network. In addition, the tools have access to the data. In a disclosed embodiment, the tools are able to automatically access the data needed to optimize or improve function of the tools. An example of the network is a wireless network where the tools may be monitored and/or controlled remotely by an application. A linking tool is optionally provided to communicate with the network and one or more of the tools.