RU2384700C1 - Structure of oil well, method of readout from devices and measuring system and readout system of oil well parametres - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: proposed group of inventions relate to oil producing industry, particularly to structures, systems and methods of measurement of parametres of oil well. Device of oil well contains the first storage device, containing the first program block and data structure block, the second storage device which is external relative to well, connected to the address and containing the second program block, connected to fileid and processor for downloading of the second program block from the second storage device. Additionally data structure block includes at least one component, selected form the group including address, fileid and flag. Additionally processor removes the first program block by the second program block and changes flag status after removing of the first program block. Measurement system and readout of parametres of oil well includes oil-field measuring apparatus which contains logic diagram, the first storing device and the second storing device. The first storing device is connected to logic diagram and contains the first program block and flag installed into the first position and the second storing device is external relative to mentioned device connected by logic diagram and contains the second program block. Additionally logic diagram perceives the second program block from the second storing device, replaces the first program block b the second program block and it is installed flag into the second position after finishing of the mentioned replacement. Method of readout is implemented by means of mentioned above device and system of measurement and readout of wells parametres.

EFFECT: reliability grow of measurement system operation and readout of wells parametres ensured by risk reduction of system damage at updated data.

29 cl, 7 dwg

Description

FIELD OF THE INVENTION

The invention relates to the oil industry, in particular to devices, systems and methods for measuring and taking readings of oil well parameters.

State of the art

Many commercial systems and consumer products use embedded computer systems to perform their functions. Embedded computer systems are often industrial microprocessors or microcontrollers that perform specialized functions on programs written in ROM, that is, software stored in non-volatile memory. Since this design is not based on specialized hardware components, it has the ability to reconfigure and quickly diverges in the market. In many cases, firmware in ROM can be updated to fix software bugs or to add new functionality. However, such an update is associated with a risk, if for some reason the non-volatile memory is damaged, the embedded system ceases to work properly. Typically, such damage is difficult to repair because the embedded system stops responding. The consequences of such violations can be significant in many systems in which manual access is limited, for example, in industrial equipment operating in hazardous conditions, spacecraft and downhole logging equipment. It is they who work in such conditions under which failures can occur associated with a deterioration in communication, fluctuations in the supply voltage or external radiation. Existing update methods are not fully immune from the risk of failure.

Disclosure of invention

The present invention provides an oil well device, consisting of a first memory device comprising a first program unit and a data structure unit including at least one component selected from the group including an address, a file identifier and a flag from a second memory device, which is external relative to the well, associated with the address and containing the second program unit associated with the file identifier, and from the processor to load the second program unit from the second I remember his device, the processor replaces the first program block and a second program block status flag changes after substitution of the first program block.

When the processor reboots, it can resume replacing the first program block if the flag is set.

The processor can set the flag before replacing the second program block with the second program block and reset the flag only after the second program block replaces the first program block.

If the indicated substitution is interrupted, the flag may remain set when the processor is restarted.

The device according to the present invention may be a wireline cable device or drill string.

The processor may download the second program unit via Internet connection.

The specified address can be an IP address or a server name.

If the processor resumes the specified substitution a specified number of times, then it will abort attempts to resume the specified substitution by resetting the specified flag.

The processor may generate a warning signal indicating that the processor cannot successfully complete the indicated substitution.

The processor can determine whether to resume the indicated substitution by determining whether the working program is located in the working state located at the destination address that is associated with the specified flag.

The present invention also provides a method of taking readings from instruments, including setting a flag in a first state, loading an updated software block from memory into a logic circuit of a downhole logging tool that is previously separated from said memory, replacing a previous software block with said updated logic block in said logical circuit, and when the specified substitution is completed, setting the flag to the second state.

In the above method, it can be carried out additionally, in case of interruption of said substitution, reloading of said logic and resuming said substitution.

Also, in the above method, a reloading of the indicated logic circuit and resumption of the indicated substitution can be carried out additionally, provided that the flag is set to the first state.

In addition to the foregoing, in the method according to the present invention, in addition, in case of interruption of said substitution, it may be possible to keep said flag set to the first state when the indicated logic circuit is reloaded.

When you download the specified updated software unit can be used Internet connection.

In the method of the present invention, it is possible, upon downloading said updated software unit, to transmit to said memory an IP address associated with said memory and a file name associated with said updated program block.

When downloading the specified updated software unit can be used located on the side wall of the read port, which is associated with the specified logic circuit.

The present invention also provides a system for measuring and taking readings of parameters of an oil well, consisting of an oilfield measuring device including a logic circuit and a first storage device connected to the logic circuit, and comprising a first program unit and a flag set to the first state, and the second storage device, which is external relative to the specified device associated with the logic circuit, and containing a second program unit. The logic receives the second program unit from the second storage device, replaces the first program unit with the second program unit, and sets the flag to the second state after completion of the indicated substitution.

The system provides for the possibility, in case of interruption of the indicated substitution, of rebooting the logic circuit and its automatic renewal of the indicated substitution.

The logic may automatically resume the indicated substitution during the reboot process.

In case of interruption of the indicated substitution, the flag may be kept set to the first state when the logic circuit is reloaded.

The flag may be an indicator of the completion of the indicated substitution, and if the flag is set in the first state after the logic circuit is reloaded, the logic circuit may attempt to complete the indicated substitution.

The aforementioned device may be a cable logging device or drill string.

The logic may replace the first program block with a second program block when it is on the surface of the well.

Also, the logic circuit may replace the first program block with the second program block when it is in the well.

The specified second storage device may transmit to the logic circuit the specified second program unit via network communication.

The specified logic circuit may download the specified second program unit from the second storage device via network communication by transmitting the stored information, which is the IP address of the specified second storage device or file name associated with the specified second program unit.

The indicated logic circuit can perceive the second program unit through a read port located on the side wall, which protrudes onto the outer surface of the device.

Brief Description of the Drawings

For a detailed description of illustrative embodiments of the invention, reference will now be made to the accompanying drawings, in which:

figure 1 - logging system during drilling in accordance with various options for execution;

figure 2 - cable logging system in accordance with various options for execution;

figure 3 - processing module in accordance with various variants of execution;

figure 4 - block diagram of the processing in accordance with various options for execution;

figure 5 - data structure used in processing in accordance with figure 4 and corresponding to various options for execution;

figure 6 is a partially disassembled logging tool placed in the processing module of figure 3, in accordance with various options for execution;

Fig.7 is a detailed image located in the side wall of the port of a partially disassembled device of Fig.6 in accordance with various embodiments.

The implementation of the invention

In the following description and claims, various terms are used to refer to specific system components. As one skilled in the art understands, various companies may use different names to designate components. This document does not intend to distinguish between components that differ in name but not in function. In further discussion and in the claims, the terms “comprising” and “including” are used in an expanded manner and, therefore, should be interpreted in the sense of “comprising, but not limited to ...”. Also, the term “communication element” or “communication device” should mean both a direct electrical connection and an indirect connection. Therefore, if the first device is connected to the second device, then this connection can be either a direct electrical connection or a connection through other devices and means of communication. In addition, the term “update” should cover any type of modification, including “resource expansion”, “recycling”, etc. In addition, the term “flag” can be used to denote any suitable type of indication, including a single bit, a sequence of bits, or some other type of indication.

Further consideration relates to various embodiments of the invention. Although one or more embodiments may be preferred, the described options should not be construed or, conversely, be used as limiting the scope of the invention defined by the claims. In addition, one of ordinary skill in the art will understand that the following description is widely used, and consideration of any embodiment is illustrative only, refers to this embodiment only, and is not intended to determine the scope of the invention, including the claims.

This description provides a method by which a software unit installed in an embedded computing system is updated with minimal risk or without risk of system damage. More specifically, the method allows you to update program blocks in such a way that even if the update process is interrupted, the system still remains operational. The disclosed systems and methods are particularly suitable for use in oilfield equipment, including logging tools that are part of larger units.

Figure 1 shows, by way of example, the equipment for logging during drilling, which includes a drill string with one or more instruments having program blocks that can be updated using the methods disclosed in this invention. A derrick 4 is installed on the drilling platform 2 with a tackle block 6 designed for raising and lowering the drill string 8. When lowering the drill string 8 through the rotary table 12, it is fixed on the lead pipe 10. The drill head 14 is driven by a borehole motor and / or by rotation of the drill string 8. During rotation, the drill head 14 forms a production hole 16 passing through various formations 18 of the rock.

The pump 20 pumps the drilling fluid through the supply pipe 22 into the lead pipe 10, down the interior of the drill string 8, through the openings in the drill head 14, back to the surface through the annular space surrounding the drill string 8, and finally into the storage tank 24. Drilling fluid transfers pieces of rock from the well and helps to maintain the integrity of the well.

The logging device 26 during drilling is combined with the equipment of the bottom of the drill string near the drill head 14. As the drill head passes through the rock formations, the logging tool 26 collects measurement data related to various formation properties, as well as to the position of the drill head and various other drilling conditions. The logging tool 26 may be in the form of a weighted drill pipe, that is, a thick-walled pipe, giving additional weight and stability, contributing to the drilling process. The equipment may include a telemetric adapter, providing the transmission of measurement data of the device to the surface receiver 30 and receiving commands from the surface receiver 30.

During drilling at various times, the drill string can be removed from the well. Logging operations can be performed as soon as the drill string is removed. Such logging operations are shown in FIG. Logging is carried out using a cable logging tool 34, that is, a sensitive logging tool suspended on a cable 42 containing conductive wires for transmitting power to the device and telemetry information from the device to the surface. Logging equipment 44 accumulates the measurement results from the logging tool 34 and contains computer units for processing and storing these results. The computer units may be a personal computer, a server, a digital signal processing board, or another type of computer unit. Computer units may have wired or wireless access to the Internet and / or to another network (not shown separately).

In any suitable part of the drill string 8 (for example, in the device 26) and / or in any suitable part of the probe 34, a processing logic 300 (i.e., an integrated system) can be placed, an illustrative embodiment of which is given in FIG. Processing logic 300 may perform various functions, including communicating the downhole tool with the surface and in the opposite direction, controlling the operation of the tool and logging operations, etc. The processing logic 300 includes a processor 302 and a storage device 304 including one or more types of memory (e.g., non-volatile memory, flash memory). The processor 302 is connected to an input / output (I / O) port 306 for transmitting and receiving data from another electronic device (eg, a computer) connected to the processing logic 300 via an I / O port 306. A software program is installed in the storage device 304. a unit including an operating system (OS) (for example, UNIX, LINUX, or WINDOWS) 308 and an operating system loader 312 used to start OS 308. OS 308 may include a software block update subunit 310, although in some embodiments this subunit may be stored separately from OS 308. When executed by the processor 302, the software block update subunit 310 signals the processor 302 to download the software block update necessary to implement the update method described below. Other program blocks may be stored in memory 304, including data blocks, in a form written to ROM and used when performing system administration / service actions, logging changes, and / or other similar actions. The program blocks 314 recorded in the ROM may contain any suitable kinds of programs, such as an operating system, application programs, etc. The method for updating a program block mentioned above can be used for any program blocks (for example, for a program block 314 recorded in ROM and stored in a memory 304). Updated can be as one software unit, or more. The method of updating a program block can also be used to load a new program block into a storage device 304. In the remainder of this description, the terms “update program block”, “updated program block”, or similar terms will be applied to both the updated program block and the new one. .

4 is a flowchart of a method 400 and representing one embodiment of a method for updating a software block. Method 400 can be started manually by an operator. Alternatively, method 400 may be performed regularly at predetermined intervals that can be programmed in logic 300. As shown in FIG. 4, execution of method 400 begins with processor 302 checking a software subunit 310 for updating a software block to determine if an updated download program block (block 402). The processor 302 may use the software sub-block 310 to update the software block to determine the availability of the updated software block using at least one of the wired or wireless methods described above. In some embodiments of the invention, the updated program unit is stored in a surface computer (for example, in hardware 44). Alternatively, the updated program unit may be stored in a separate computer (for example, on a server or in some embodiments on several servers), to which a surface computer is connected via a network (for example, via an Internet communication protocol such as a network file transfer protocol (FTP), Hypertext Transfer Protocol (HTTP), the standard network file protocol (NFS)). In particular, the software block update subunit 310 gives a signal to the processor 302 about the direction of the request signal to a given object (for example, the aforementioned surface computer) to determine if the object is ready to transmit the updated program block to the logic circuit 300. In turn, the given object can send a response signal to a logic circuit 300 containing information about the availability of the updated software unit for download. Localization of a given object (for example, IP address) is provided in the program block 310 for updating the program block, but can be changed if necessary.

If the processor determines (for example, using the method described above) that the updated software block is available for download (step 402) during the interaction of the software sub-block 310 of the software block, the method 400 provides for the processor 302 to provide a signal to the software sub-block 310, which outputs the corresponding signal to the loader 312 about the loading of the updated software block at the next reboot of the logic circuit 300 (step 404). When interacting with the processor 302, the software subunit 310 of the updated software block gives a signal to the processor 302 to allocate a specific area of memory 304 for the information needed by the bootloader to download the updated software block at the next reboot. In alternative embodiments, the updated program unit may be downloaded as soon as the processor 302 determines that the updated program unit is available for download (i.e., before rebooting). In at least some such embodiments, the software sub-block 310 of the software block updates the processor 302 to start loading the updated software block and allocate a specific memory area 304 for the information needed by the loader 312 to resume downloading the updated software block if the current download is interrupted and the logic 300 processing rebooted. In such cases, a flag (for example, a flag described below) may be used to indicate to the loader 312 that the download of the updated program unit should be resumed upon reboot.

Regardless of whether the updated program unit is loaded before or after a reboot, the specified memory area 304 is allocated taking into account the data structure shown in FIG. 5. 5, an illustration is given of a data structure 500 that can be populated with various information used to control the loading of an updated software unit. The data structure 500 is stored in memory 304 and contains at least one element 501. Each element may include fields 502, 504 and 506. Field 502 contains an address such as a server name or IP address (hereinafter “IP address 502” ) of the object where the updated program unit is stored. In the field 504 are at least one file identifier (for example, the name of the file (s) or version (s), hereinafter “FI 504”) associated with the updated program unit. Field 506 contains a flag, such as a flag (hereinafter “flag 506"). The software sub-block 310 of the update of the program block may signal the processor 302 to set or clear the flag 506 (for example, one or more bits) in the memory 304. When downloading, the set flag 506 will indicate to the loader 312 that the download of the program block should begin, or that started earlier, but incomplete download of the program unit should be resumed. For example, if the updated program block is loaded before the reboot, but the download failed, the flag can be set so that when the reboot resumes the input of the program block.

Next, in method 400, the software sub-block 310 of the software block updates the signal to the processor 302 to restart the logic circuit 300 (step 406). In some embodiments, the software sub-block 310 of the software block update may give the processor 302 a signal to give the user of the logic circuit 300 a delayed reset option of the logic circuit 300. For example, using a computer connected to the I / O port 306, the user may be able to determine the moment in the future, when the logic circuit 300 is restarted. During the reboot, the status of the flag 506 reflects the status of the associated download of the updated program unit. For example, a flag set may indicate that the logic circuit 300 has been reloaded before the updated program unit entered is properly stored in memory. Alternatively, a flag set may indicate that there was no input to a program block at all. Similarly, flashing a flag may indicate that the updated software unit has been downloaded and installed properly.

At boot, bootloader 312 is associated with processor 302 (step 408). The loader 312 gives a signal to the processor 302 to determine the status of the flag 506 during the download process (step 410). If processor 302 determines that flag 506 is set, bootloader 312 signals processor 302 to download (or resume downloading) the updated program block (step 412), having the file name (s) and / or version that correspond to FI 504. An updated program block is downloaded from an object whose IP address corresponds to IP address 502. Loader 312 can signal processor 302 to load the loaded program block or files into unused memory area 304. Alternatively, loader 312 signals processor 302 to replace part or all of a gram block already stored in memory 304 with an updated program block. In some embodiments, such rewriting comprises replacing one program unit with another program unit.

For example, if the processor 302 determines that the updated program block (having the file name "SOFTWARE_UPDATE.EXE") is available for download from the server with IP address 65.70.55.89, when the software sub block 310 updates the program block, then the program block 310 updates the program block gives the signal to the processor 302 to enter the IP address 65.70.55.89 and the file name SOFTWARE_UPDATE.EXE into element 501 of the data structure 500. The software update sub-block 310 of the program block also gives a signal to the processor 302 to set a flag for the element 501. Upon reboot, the bootloader 312 together with the processor 302 will detect the set flag and perceive the set flag as a signal to start loading the SOFTWARE_UPDATE.EXE file from the object with IP address 65.70. 55.89. As mentioned previously, although any type of updated program block (such as the executable file shown above) can be downloaded, it is preferred that the program blocks are downloaded as a whole.

The loader 312 gives a signal to the processor 302 to monitor the status of the download and / or recording of the updated program block (step 414). In at least some embodiments, the processor 302 monitors the download status by checking the checksum of the downloaded program unit and verifying that the loaded program unit is stored in non-volatile memory.

If the loading and / or storing process is interrupted for any reason (for example, in cases when the program unit is installed or updated only partially, such as a power failure, damage to hardware or programs, connection problems, operator / user errors etc.) or otherwise failed to complete (step 416), bootloader 312 will prevent processor 302 from changing the status of flag 506. Instead, flag 506 is saved in the set state (step 418). In this case, when the logic 300 is restarted, the loader 312 determines that the flag 506 is still set, indicating that the updated program unit has not yet been installed and is not properly stored in the memory 304. Then the loader 312 can signal the processor 302 to restart the operation as a whole load and store in memory. Preferably, however, the loader 312 signals the processor 302 to resume the previous load / store operation.

The previous load / store operation may be resumed using the data structure 500. Although not specifically shown in FIG. 5, in at least some embodiments, at least one element 501 of the data structure 500 may comprise a destination address showing where the updated program unit received at the specified IP address should be entered in the logic 300. If the update of the program block was not performed properly and the logic circuit 300 reboots, the loader 312 gives a signal to the processor 302 to check the destination address in element 501 to determine whether the update of the program block was properly downloaded and installed (for example, is it working program block at destination address). If the updated program block has not been properly downloaded or installed, the loader 312 signals the processor to resume the download / memory operation at the destination address indicated in element 501. The scope of the present disclosure is not limited to this particular method, and other methods of determining the state are also possible. previously performed loading / recording operation of the program unit.

When processor 302 determines that the updated program unit has been properly downloaded and stored in memory 304 (step 416), bootloader 312 signals processor 302 to clear flag 506 (step 420). Since flag 506 is no longer set, the next time it reboots, processor 302 will not attempt to download the updated software unit. After the loader 312 issues a signal to the processor 302 to reset the flag 506 (step 420), the method 400 provides for the loader to start the OS 308 (step 422).

In some cases, several flags 501 in several elements may be set. Each flag set can be associated with an update to various program blocks. In each case, the operations performed in steps 406 through 420 of FIG. 4 are repeated as necessary until each flag set is cleared by successfully updating the software unit.

In some cases, hardware or software malfunctions can interfere with the successful updating of the software unit. In such cases, at least some operations of method 400 may be performed repeatedly with little or no success. Accordingly, the bootloader 312 may be configured to stop attempts to update the software unit after a given number of retries. For example, loader 312 may be executed to terminate attempts to update a software block after ten attempts have failed. In this case, after the unsuccessful tenth attempt to update the software unit, the loader 312 can signal the processor 302 to stop further update attempts (for example, by resetting the corresponding flag in the data structure 500) and then a signal to issue an alert signal. In some embodiments, such a warning signal can be obtained by illuminating an LED (not shown separately) connected to the logic circuit 300. In other embodiments, such a warning signal can be received in the form of an electronic message or a signal received by an electronic device (eg, a computer), not included in the logic circuit 300 (for example, equipment 44), via I / O port 306. When this signal is received, the user can try to eliminate the failure and resume attempts to update the software loka.

The method described with reference to FIG. 4 may be performed when the logic circuit 300 is located either in the well or on the surface. In embodiments where the logic 300 is part of the probe 34, this logic may be in the well and therefore comprise a software block updated in the well. Communication (for example, when downloading a software block) between the logic circuit 300 and the logging equipment 44 may be via cable 42. At least in some embodiments, the logging equipment 44 is connected to a network and / or the Internet. In some such embodiments, it is possible to download information (eg, about updating a software block or upgrade) from the network and / or the Internet through the logging equipment 44 to the logic circuit 300.

In some embodiments, the logic 300 enters the drill string 8 as an instrument 26. A partially disassembled instrument 600 is shown in FIG. The device 600 comprises a read port 602 located on the side wall, to which free access is ensured after the device is fully installed and connected to the drill string. Compared to other methods in which the operator must, for example, dismantle the device in order to get to the integrated logic to update the software unit, the read port 602 located on the side wall facilitates electrical access to the integrated logic 300 and allows the operator to perform a quick update program block. In this way, both production downtime and opportunity costs are reduced or minimized.

In some embodiments, the readout port 602 located on the side wall can be connected to the I / O port 306. In other embodiments, the readout port 602 located on the side wall can be considered as I / O port 306. The readout port 602 located on the side wall in more detail presented in Fig.7. As shown in FIG. 7, the read port 602 located on the side wall contains a group of pins 604 that are capable of pairing with a communication cable (not shown separately) connected to a computer, such as equipment 44, for example. In this way, data is transferred between the logical circuit 300 and any electronic device associated with it. In embodiments where the logic 300 is included in the drill string 8, the process shown in FIG. 4 is preferably performed on the surface with a partially disassembled device 600 (i.e., logic 300).

The foregoing discussion is intended to illustrate the principles and various embodiments of the present invention. After reviewing the foregoing description, various modifications and variations of the invention will become apparent to those skilled in the art. The object of the following claims is to present and cover all such variations and modifications.

Claims (29)

1. An oil well device, consisting of a first memory device comprising a first program unit and a data structure unit including at least one component selected from the group including an address, a file identifier, and a flag, from a second memory device, which is external relative to the well associated with the address and containing the second program unit associated with the file identifier, and from the processor to load the second program unit from the second storage device, wherein a quarrel replaces the first program block with a second program block and changes the status of the flag after replacing the first program block. 2. The device according to claim 1, in which when the processor is restarted, it resumes the replacement of the first program unit, if the flag is set. 3. The device according to claim 1, in which the processor sets the flag before replacing the second program block with the first program block and resets the flag only after the second program block replaces the first program block. 4. The device according to claim 3, in which, if the specified substitution is interrupted, the flag remains set when the processor is restarted. 5. The device according to claim 1, which is a device selected from the group comprising a wireline cable device and a drill string. 6. The device according to claim 1, in which the processor downloads the second program unit via Internet connection. 7. The device according to claim 1, in which the specified address is selected from the group including the IP address and server name. 8. The device according to claim 1, in which, if the processor resumes the specified substitution a specified number of times, it aborts attempts to resume the specified substitution. 9. The device of claim 8, in which the processor aborts attempts to resume said substitution by resetting said flag. 10. The device according to claim 8, in which the processor generates a warning signal indicating that the processor cannot successfully complete the indicated substitution. 11. The device according to claim 1, in which the processor determines whether to resume the specified substitution by determining whether the working program is located in the working state located at the destination address that is associated with the specified flag. 12. The method of taking readings from the instruments, including setting the flag to the first state, loading the updated program block from memory into the logic circuit of the downhole logging tool, which is previously separated from the indicated memory, replacing the previous program block with the updated program block in the indicated logic circuit and upon completion of the indicated replacing the flag setting in the second state. 13. The method of claim 12, further comprising, in the event of interruption of said substitution, reloading of said logic and resuming said substitution. 14. The method of claim 12, further comprising reloading said logic circuit and, if said flag is set to a first state, resuming said substitution. 15. The method according to claim 12, further comprising, in case of interruption of said substitution, maintaining said flag set to the first state upon rebooting said logic circuit. 16. The method according to item 12, in which when downloading the specified updated software unit using Internet connection. 17. The method according to item 12, in which when downloading the specified updated program unit, the IP address associated with the specified memory and the file name associated with the specified updated program unit are transferred to the indicated memory. 18. The method according to item 12, in which when downloading the specified updated software unit, a read port located on the side wall is used, which is connected to the specified logic circuit. 19. A system for measuring and taking readings of parameters of an oil well, consisting of an oilfield measuring device including a logic circuit and a first memory device connected to a logic circuit and containing a first program unit and a flag set to the first state, and from a second memory device, which is external relative to the specified device associated with the logic circuit and containing the second program block, while the logic circuit perceives the second program block from the second th memory device, the first program block replaces the second program block, and sets a flag to the second state after the completion of said substitution. 20. The system according to claim 19, in which in case of interruption of the indicated substitution, the logic circuit restarts and automatically resumes the indicated substitution. 21. The system according to claim 19, in which the logic circuit automatically resumes the indicated substitution during the reboot process. 22. The system according to claim 19, in which, in case of interruption of said substitution, the flag is kept set to the first state when the logic circuit is reloaded. 23. The system according to claim 19, in which the flag is an indicator of the completion of the indicated substitution, and if the flag is set in the first state after the logical circuit is reloaded, the logical circuit attempts to complete the specified substitution. 24. The system according to claim 19, in which the device is a device selected from the group comprising a cable logging device and a drill string. 25. The system of claim 19, wherein the logic circuit replaces the first program block with the second program block when the logic circuit is on the surface of the well. 26. The system of claim 19, wherein the logic circuit replaces the first program block with the second program block when the logic circuit is in the well. 27. The system of claim 19, wherein said second storage device transmits to said logic the said second program unit via network communication. 28. The system of claim 27, wherein said logical circuit downloads said second program unit from a second storage device via network communication by transmitting stored information selected from a group including the IP address of said second storage device and a file name associated with said second software unit. 29. The system of claim 19, wherein said logic circuitry receives the second program unit through a read port located on a side wall protruding onto the outer surface of the device.

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