SU1430516A1 - System for data transmission from borehole - Google Patents

Description

. The invention relates to geophysical studies of wells, in particular, to tele-measuring systems for collecting and transmitting information from carriage instruments (depth sensors) to the day surface.

The purpose of the invention is to increase the capacity of the data transmission system from drilling wells.

In Fig. 1, a system diagram of a data transmission system from boreholes is shown; FIG. 2 is a block diagram of the depth mark analysis block in conjunction with the control word generator in FIG. 3 — control signal structure J in FIG. 4 — structure of the depth particle diagram in FIG. 3 — information signal structure.

The data transmission system from boreholes (Fig „1) contains a land part 1, a depth part 2 connected by a communication cable 3. The ground part consists of a processor 4 connected to modem 5 and buses 6. A cable 3 is connected to modem 5. Tires b are connected to receivers 7 of information and a generator of 8 control words, the input of which is connected to the unit 9 for analyzing depth marks. The deep part consists of an lOj processor connected to a 1 1 modem and 1.2 buses. The modem 11 is connected to the second end of the communication cable 3. Tires 12 are connected to a storage unit 13 and secondary converters 14 deep sensors,

Fig. 2 shows the structural scheme of the depth mark analysis block 9 together with the control word generator 8. The depth tag analysis block 9 consists of a controller 15 connected to the depth mark sensor 16 and via bus 17 to the logging task memory block 18 The controller 15 is also connected to the control word generator 8, namely to register 19 via bus 20 The control word generator 8 consists of a register 19 and an interface element 21, which is connected to the bus 6

The control signal (FIG. 3) consists of the start message 22j of the control word 23, the control word 24 and the stop message 25,

FIG. 4 is a more detailed structural diagram of the deep part. The main part consists of a modem 115 connected to the cable, 3 connections and the processor 10, to the processor

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10, the address bus 26 ,, the data bus 27 and the control bus 28 are connected. The storage unit 13 is connected to the address bus 26 and is connected to the processor 10 by the information bus 29 and the write-read bus 30. The secondary transducers 14 of the depth sensors are connected to the data bus 27 and the control 28 via interface elements 31 and to the address bus 26 via the circuits 32 recognizing addresses included in interface elements.

Tires 26-30 (FIG. 4) are combined. In FIG. 1, numbered.

The information {signal (figure 5) consists of the starting parcel 33 of the address word 345 of the information word 35 ,, the control word 36 and the stop parcel 37,

The device works as follows.

The depth tag signal from the depth tag sensor 16 (FIG. 2) enters the controller 15, which calculates the depth at which the logging tool is located and reverses through the bus 17. According to the task. On the logging, the controller 15 decides which specific depth sensors should be interrogated at a given depth. Information about this via bus 20 enters the control word generator 8, where a task for polling sensors is generated. The control word generator 8 consists of an n-bit register 19, where the n-number of depth sensors in the logging tool r and the interface element 21. If the depth sensor is up to be interrogated, then the bit corresponding to the sensor number is from 1 to n otherwise one is written, zero. In the presence of a large number of sensors, an inquiry can be formed by two controllers more control words. The processor 4 of the ground part (Fig. 1) interrogates the control word generator 8 on the bus 6, generates a control signal j consisting of the starting pad 22 (fig H), control word 23, control word 24 and stop 25, Depending on the method of transferring stop, the package may be missing. The control signal is via modem 5 (FIG. 1), the communication cable 3 is transmitted to the deep part 2, where via modem 11 it goes to the processor 10 "by the processor

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from the control signal, the control word n is recorded in the storage unit 13 (Fig. 4). The recording in the storage unit 13 occurs as follows. At its 30 Record Level, a Record signal is set. On address busbar 26, a zero address is set corresponding to the first sensor. The first bit of the control word is written to this cell over the information bus 29. Then the first address is set and the second bit of the control word is written to the first address cell, and so on. to mn-addresses, when the n-bit of the control word is written in the cell of this address, where. At the end of the write cycle, the storage unit 13 is switched to read mode, and a read signal is set on bus 30. The processor 10 begins a cycle of polling the secondary transducers 14 deep sensors. The address bus 26 is set to the zero address, corresponding to the first sensor. The address is recognized by the address recognition circuit 32 of this sensor. The processor 10 checks the cell of the storage unit 13 at the zero address. If a unit is recorded in the cell, the processor outputs a control signal to bus 28. By this signal, the information word of the secondary transducer of the first depth sensor is transmitted to data bus 27 via an interface

element 31. Otherwise, if zero is written in the cell of the storage unit 13, the transition to the next address is made. The processor 10 receives the information word from the data bus 27 and generates an information signal. On address bus 26, the next address is set, and the cycle of polling of the secondary transducers 14 of the depth sensors is repeated. The information signal (figure 5) consists of the starting parcel 33, the address word 34, the information word 35, and a stop parcel 37. Depending

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may be missing. The information signal via modem 11 (FIG.), The communication cable 3 is transmitted to the ground part 1, where via modem 5 it goes to the processor 4. The processor 4 extracts the information and address words and transmits the information word via buses

 6 to one or another channel depending on the address word of the information receivers 7 for subsequent registration.

The proposed system, compared with the prototype, ensures that measurement accuracy to depth is increased by interrogating secondary depth sensors directly from the depth analysis on which the logging tool is located and the logging task, as well as an increase in the transmission capacity of the transmission system due to a reduction in the number of exchanges between the ground and deep parts.

Claims (1)

The formula of the invention. neither A data transmission system from boreholes containing a surface and a deep part connected by a communication cable, the ground part containing a processor connected to information receivers, the processor output is connected via a modem to a communication cable, and connected via modem to a communication cable and connected by buses to secondary converters via interface elements with an address recognition circuit, characterized in that, in order to increase throughput, the ground part is provided with ene-generator control yusch1 r words and tags depth analysis unit, wherein the output of depth marks analysis unit connected to the input control word generator coupled to the tire land part and the deep part is provided with a memory unit, connected to the deep part of the tires. 15 w ABOUT srig.2 22 23 A. 6 n 26 9 & i / p.J hw