Wellbore power and/or data transmission devices and methods
a data transmission device and wellbore technology, applied in the field of wellbore power, can solve the problems of compromising the ability of the cable to carry data and/or power, the limited annular space through which conventional cables run, and the easy damage of cables during installation
Inactive Publication Date: 2009-04-02
BAKER HUGHES INC
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Benefits of technology
The present patent provides a method and system for transmitting signals between surface and downhole devices in a wellbore. The system includes a conductive element, such as a tubular, that is electrically coupled to the surface and downhole devices. The conductive element can be used to transmit data signals, command signals, and electrical power. The system can also include a wellbore tubular that is positioned in the wellbore and is electrically coupled to the conductive element. The conductive element can have a bore to convey fluid, and a surface fluid source can supply fluid into the bore. The system can be used to control or energize downhole devices. The technical effects of the patent include improved signal transmission in wellbore tools and the ability to control or energize downhole devices.
Problems solved by technology
Moreover, the annular space through which conventional cables run can be limited.
Thus, such cables can easily be damaged during installation.
Such damage can compromise the ability of the cable to carrying data and / or power.
Method used
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[0016]The present disclosure relates to devices and methods for providing signal transmission between surface equipment and downhole equipment. As used herein, the term signal is broadly used to encompass data, commands and electrical power. The present disclosure is susceptible to embodiments of different forms. There are shown in the drawings, and herein will be described in detail, specific embodiments of the present disclosure with the understanding that the present disclosure is to be considered an exemplification of the principles of the disclosure, and is not intended to limit the disclosure to that illustrated and described herein. Indeed, as will become apparent, the teachings of the present disclosure can be utilized for a variety of well tools and in all phases of well construction and production. Accordingly, the embodiments discussed below are merely illustrative of the applications of the present disclosure.
[0017]Referring initially to FIG. 1, there is shown an exempla...
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A signal transmission device transmits power and / or data between one or more surface devices and one or more downhole devices positioned in a wellbore. The signal transmission device includes at least one conductive element that electrically couples to one or more downhole devices and electrically couples at a surface end to the one or more surface devices. The conductive element is also coupled to the wellbore tubular to form a conductive circuit. The conductive element can also include a bore for conveying fluid from a surface source.
Description
CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application takes priority from U.S. Provisional Patent Application Ser. No. 60 / 870,023 filed Dec. 14, 2006.BACKGROUND OF THE DISCLOSURE[0002]1. Field of the Disclosure[0003]This disclosure relates generally to methods and devices for conveying power and data between the surface and one or more downhole locations.[0004]2. Description of the Related Art[0005]Valuable hydrocarbon deposits, such as those containing oil and gas, are often found in subterranean formations located thousands of feet below the surface of the Earth. To recover these hydrocarbon deposits, boreholes or wellbores are drilled by rotating a drill bit attached to a drilling assembly (also referred to herein as a “bottom hole assembly” or “BHA”). Thereafter, a casing is positioned in the wellbore and one or more production zones in the wellbore are completed using appropriate equipment such as packers, in-flow devices, submersible pumps etc.[0006]Many of the devices...
Claims
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IPC IPC(8): E21B47/12
CPCE21B47/121E21B47/125
Inventor IAIN, MACLEAN
Owner BAKER HUGHES INC