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Subsea communications multiplexer

a technology of subsea communication and multiplexer, which is applied in the direction of survey, sealing/packing, and borehole/well accessories, etc., can solve the problem of less desirable late option

Inactive Publication Date: 2008-09-11
SCHLUMBERGER TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a system that allows communication between a surface facility and a subsea production control system. It includes a device at the water surface with communication interfaces, and a device at the water bottom with communication interfaces. A communication channel connects the two devices. The system also includes a multiplexer and two remote devices, one sensor and one control, that are connected to the water bottom multiplexer. The system also includes two corresponding devices, one signal acquisition device and one control signal generating device, that are connected to the surface multiplexer. The technical effect of this system is to enable efficient communication between the surface and subsea facilities, allowing for better control and monitoring of production activities.

Problems solved by technology

The latter option has been made less desirable by adoption of certain industry standard communication configuration and protocol.

Method used

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Examples

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Embodiment Construction

[0015]FIG. 1 shows an example arrangement of a subsea production system, which includes a subsea well 10 in which certain types of completion equipment is installed. The completion equipment includes a production conduit 12, such as production tubing. Various sensors 14, 16, 18 and control devices 20 are positioned within the subsea well 10. Examples of sensors 14, 16, 18 include pressure sensors, temperature sensors, flow rate sensors, shock detectors (e.g., accelerometers), among other types of sensors. Examples of control devices 20 include a flow control device (e.g., a valve) and a pump, among others. The sensors 14, 16, 18, and the control device 20 can be coupled by a downhole communications link 22. The downhole communications link 22 can be an electrical cable, a fiber optic line or a wireless communications link such as acoustic or electromagnetic. The downhole communications link 22 extends to subsea wellhead equipment 24, such as a subsea well control system or “tree.” P...

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PUM

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Abstract

A system for communicating between a surface facility and a subsea production control system includes a communications device proximate the water surface. The water surface communications device has at least one communication interface. A communications device is functionally associated with a wellhead or subsea structure proximate the water bottom. The water bottom communications device has at least one communication interface. A communication channel extends between the surface communication device and the water bottom communication device. A multiplexer is functionally coupled to the communication interface on each of the surface and water bottom communication devices. At least two remote devices are functionally coupled to the water bottom multiplexer. The remote devices comprise at least one of a sensor and a control. At least two corresponding devices are coupled to the surface multiplexer. The corresponding devices include at least one of a signal acquisition device and a control signal generating device.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS [0001]Not applicable.STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT [0002]Not applicable.BACKGROUND OF THE INVENTION [0003]1. Field of the Invention[0004]The invention relates generally to the field of devices used to communicate signals between a wellbore or seafloor-based device having production control equipment at the bottom of a body of water and production facilities located at the water surface. More particularly, the invention relates to signal multiplexing devices that enable signals to and from a plurality of wellbore or seafloor-based devices to communicate to the production facilities using existing water bottom to water surface communication channels.[0005]2. Background Art[0006]U.S. Patent Application Publication No. 2004 / 0262008 A1 filed by Deans et al. and incorporated herein by reference describes a system for communicating signals from a production facility located at the surface of a body of water, such as ...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): E21B7/00
CPCE21B47/12H04L67/12H04J15/00H04J99/00
Inventor DEANS, GREGOR
Owner SCHLUMBERGER TECH CORP
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