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Integrated downhole system with plural telemetry subsystems

A technology of subsystems and control systems, applied in distribution line transmission systems, power line communication systems, systems suitable for drilling/wells, etc., can solve problems such as incompatibility, time-consuming tripping equipment, low depth capabilities, etc.

Active Publication Date: 2015-12-16
EVOLUTION ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Disadvantages of EM telemetry include: lower depth capability, incompatibility with some formations (e.g., high saline formations and formations with high resistivity differences)
However, batteries have a limited capacity
Time-consuming and expensive tripping equipment from wellbore to replace battery

Method used

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  • Integrated downhole system with plural telemetry subsystems
  • Integrated downhole system with plural telemetry subsystems
  • Integrated downhole system with plural telemetry subsystems

Examples

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Effect test

example 1

[0208] In an exemplary embodiment, the downhole system 40, 40A, 50 is configured (e.g., by appropriate software) to initially start operating using a selected telemetry mode, and to change to Different telemetry modes.

example 2

[0210] In another exemplary embodiment, in the first mode, EM telemetry 46A and MP telemetry 46B are both active and available for transmission. The first mode may be a 'concurrent sharing' mode in which the EM telemetry 46A is configured to send the most recent measurement from the heading and tilt system 62 along with measurements from one or more of the remaining sensors. In a first mode, MP telemetry 46B may be dedicated solely to sending the most recent measurements from gamma system 64 . In the first mode, the telemetry system 46 transmits data independently for a corresponding increase in the total bandwidth of the telemetry system 40 .

[0211]Also, in this example, control system 42 may be configured such that if MP telemetry 46B is disabled or if appropriate instructions are received from the ground, control system 42 may switch to a second "EM-only" mode. Control system 42 may send a status message prior to switching modes. This status message notifies the ground ...

example 3

[0218] In another example, the downhole system (or surface equipment) is configured to periodically determine a cost per data bit transmitted by a plurality of available telemetry subsystems. A penalty can be determined in terms of energy consumption and / or efficiency (eg, a penalty can be imposed on telemetry subsystems with slow data rates or unreliability). Based on this cost information, different modes of operation (e.g., EM-only mode, MP-only mode, the total amount of data to be sent and / or the distribution of this data between the EM telemetry subsystem and the MP telemetry subsystem can be used. Automatically switch the downhole system between any of the different sharing modes on the Internet.

[0219] As another example, users of the downhole system may pay different rates for data sent through different telemetry subsystems. Based on the economic cost information, the downhole system can be manually or automatically switched between different operating modes. For ...

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Abstract

A downhole system has a plurality of telemetry systems and a control system configured to obtain information from one or more sensors and transmit that information on one or more of the plurality of telemetry systems. The configuration of a controller may be changed so as to change which information is transmitted on a given telemetry system and how the information is to be transmitted on the given telemetry system.

Description

[0001] Cross References to Related Applications [0002] This application claims from U.S. Application No. 61 / 768936, filed February 25, 2013, entitled Downhole Telemetry, and U.S. Application No. 61, filed February 25, 2013, entitled Downhole Electromagnetic and Mud Pulse Telemetry Apparatus / 769033, both of which are hereby incorporated by reference for all purposes as if fully set forth herein. technical field [0003] This application relates to subsurface drilling, and more particularly to downhole data acquisition and telemetry between downhole components and surface equipment. Embodiments are applicable to drilling wells to produce hydrocarbons. Background technique [0004] Extracting hydrocarbons from subterranean areas typically involves drilling wellbores. [0005] A wellbore is formed using surface-located drilling equipment that drives a drill string, from which the drill string ultimately extends to a formation or subterranean region of interest. The drill s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/13E21B47/135E21B47/14H04B3/54
CPCE21B7/04E21B47/00E21B47/12E21B47/14E21B47/18H04B3/54H04B2203/5458H04B2203/5475E21B47/13
Inventor 阿伦·W·洛根大卫·A·斯维策尔刘继利贾斯廷·C·洛根徐明东
Owner EVOLUTION ENG
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