Abstract:
An electronics module for a well installation comprises a wireless receiver for receiving data and/or software from an external source.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the benefit of United Kingdom Patent Application No. 0714471.0, filed on Jul. 25, 2007, which hereby is incorporated by reference in its entirety. 
       FIELD OF THE INVENTION 
       [0002]    This invention relates to an electronics module for a well installation, and a method of loading software and/or data to such a module. 
       BACKGROUND OF THE INVENTION 
       [0003]    The control of a subsea fluid extraction well is normally effected by a subsea electronic control module (SEM) housed within, or located close to, a subsea control module (SCM) mounted on a well tree, situated on the sea bed at the well head. The SEM is provided with electric power and communications via an umbilical line to a control platform, which may be on a vessel or located on land. Typically, the SEM receives commands via the umbilical communication line to its internal electronics. These are then processed by the SEM, and the resulting electrical outputs are sent to electrically-operated production fluid control valves and/or directional control valves (DCVs) housed in the SCM, which control hydraulic power to hydraulically-operated valves. The SEM also feeds data relating to such operations back to the control platform. Additionally, the SEM electronics handles many other functions, which include the collection and interpretation of data from sensors distributed throughout the production system, such as pressure, temperature, fluid flow, microseismic, oil/water quality and, on more recent systems, compressed video and transmits them back to the control platform. The SEM also houses the electronics required to operate a High Integrity Pipeline Protection System (HIPPS) and the electronics for the communication system, such as modems and routers, or in more modern systems, Ethernet interfaces, as well as communication redundancy. 
         [0004]      FIG. 1  shows a block diagram of a typical existing SEM. A modem  1  effects external communication, e.g. to the control platform, through an interface A. The modem  1  communicates internally to an SEM processing means  2 , which implements commands from the control platform in the form of outputs to driver circuits  3 . These in turn output a multiplicity of drives to external devices such as DCVs through interfaces B. External inputs from a multiplicity of interfaces C connect to signal conditioning electronic circuits  4 . These external inputs include for example signals from the SCM such as monitoring functions, e.g. pressure and temperature measurements, positions of valves etc which can have a variety of electrical interfaces. The circuits  4  convert these electrical inputs into a suitable interface for processing means  2 . The processing means  2  then processes the inputs and either effects control of the well via the interfaces B and/or outputs data via the modem  1  back to the control platform through the interface A. For the processing means  2  to operate, it is necessary to load data and software to it. This is carried out during factory testing and installation, and is achieved relatively slowly via the modem  1  through the interface A. 
         [0005]    Typically, modern SEMs employ processors/microcontrollers to implement the functions described above which has resulted in very large software packages and data having to be loaded in. It takes typically seven hours to load the software/data on a current SEM, via its communication modem, due to the relatively slow speed of the modem. This has a major effect on both testing times and cost. Furthermore, the costs involved in having to take this length of time on the installation vessel at the point of installation are highly significant. One possible solution to this problem could be to add a high-speed data link to the SEM, but this would mean that an additional connector has to be added to the SCM electronic interface plate. However, with the prevailing trend to provide smaller and lighter well control systems containing SCMs, the surface area of the SCM connector end plate has become minimal and there is typically not enough room to add another connector. Furthermore, such a connector may be an expensive device. 
       SUMMARY OF THE INVENTION 
       [0006]    It is an aim of the present invention to overcome these problems, namely to provide a system which enables rapid loading of software or data to a SEM, without requiring an additional connector. 
         [0007]    This aim is achieved by incorporating a short range, high frequency, wireless transceiver, such as Bluetooth (RTM), to the internal electronics of a SEM. The existing wires connecting to the internal modem may be utilised as an antenna, and software/data loaded via this link. Thus no additional connector is required at the SCM end plate and if the carrier frequency of the transceiver is in the GHz region and thus wide band, data and software can be loaded rapidly. Since the electronics of the SEM, including the transceiver, is housed in a metal-screened container, spurious radiation from the transceiver is contained. The current cost of small transceivers such as Bluetooth (RTM) are insignificant compared with the costs involved with the long software/data loading times of existing systems. 
         [0008]    Using the invention, the extensive quantity of software and data required by the processor in a modern SEM can be loaded in a fraction of the time that it takes to load via the normal modem interface, thus making major savings in time and cost in both the manufacturing and test of the product and its installation. 
         [0009]    In accordance with a first aspect of the present invention there is provided an electronics module for a well installation as set out in the accompanying claims. 
         [0010]    In accordance with a second aspect of the present invention there is provided a method for loading software and/or data to an electronics module for a well installation as set out in the accompanying claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0011]    The invention will now be described, by way of example, with reference to the accompanying drawings, in which:— 
           [0012]      FIG. 1  schematically shows a known SEM arrangement; and 
           [0013]      FIG. 2  schematically shows a SEM and loading means in accordance with the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0014]      FIG. 2  schematically shows an SEM in accordance with the invention, together with means for loading software and/or data to the SEM. Components in common with the known SEM shown in  FIG. 1  retain the same reference numerals. A transceiver  5  is located within the SEM, and connected to a port on the processing means  2  for communication therewith. The transceiver  5  has an RF input/output coupled, for example capacitively, to the existing modem external interface A. The modem interface A wiring functions as an antenna or aerial for the transceiver  5  in use. Firmware is stored in the processing means  2 , typically in ROM, at manufacture. This enables communication between the transceiver  5  and the processing means  2 . 
         [0015]    In order to load the required software and/or data to processing means  2 , an external processor  7  is used, which is connected to a wireless transceiver  6 . The processor  7  may for example be a laptop computer, which carries the software/data required by the SEM. Transceiver  6  includes an antenna  8  to effect wireless communication with transceiver  5  via the wiring of modem interface A. In this way, data and/or software can be transmitted at high speed through the wireless interface. 
         [0016]    Although the efficiency, as an antenna, of the existing modem wiring is relatively poor, it is adequate to permit successful communication, since the antenna  8  of the external transceiver  6  can be placed very close to the interface A during loading. 
         [0017]    In an alternative embodiment of the present invention, not shown, an external processor  7  that has wi-fi capability is employed, together with a wi-fi compatible transceiver  5  in the SEM. With this arrangement, the need for a separate transceiver  6  is eliminated. 
         [0018]    The above-described embodiments are exemplary only, and various alternatives are possible within the scope of the claims. 
         [0019]    Although Bluetooth (RTM) and wi-fi have been specifically mentioned, any other wireless communication systems and protocols may be used provided that they are capable of handling the necessary volume of data at the required rate for satisfactory operation of the electronics module. 
         [0020]    It is envisaged that the present invention may either be used to effect loading of the software and/or data in the first instance, or may be used as a back-up arrangement to current methods if necessary.