Long-range single-cord well logging bus control system
A bus-controlled, long-distance technology, used in general control systems, control/regulation systems, computer control, etc., to solve problems such as control circuit aging, inability to implement multi-instrument combinations, and affecting normal logging operations.
Active Publication Date: 2011-06-22
BC P INC CHINA NAT PETROLEUM CORP +1
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Problems solved by technology
This power supply mode is very suitable when the operating voltages of the various instruments are similar, but when the operating voltages of the various instruments used in horizontal well logging are quite different, it is impossible to realize the combination of multiple logging instruments with different operating voltages
When the multi-instrument combination cannot be realized, it usually takes turns to work in which some instruments are powered on and the main circuit power supply of the other part is disconnected and dormant.
At present, because the control circuit used for this kind of alternate working mode is aging and outdated, its concentration is not high, and the failure rate is high, which affects the normal progress of logging operations
Method used
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[0011] The present invention is provided by the following embodiments, which will be described below in conjunction with the accompanying drawings.
[0012] like figure 1 Shown, the present invention consists of computer 1, ground control box 2, single-core cable 3, first mode switch 4 (K 1 ), the second mode switch 9 (K 2 ), the first relay 5, the second relay 12, the communication unit 6, the CPU unit 7, the bus control unit 8, the low-voltage power supply 10, the first and the second relay control unit 11, and its connection relationship is as follows: the computer 1 connects with the The ground control box 2 is connected; the communication unit 6, the CPU unit 7, the bus control unit 8, and the low-voltage control power supply 10 are connected in series through wires, and are connected in parallel with the first and second relay control units 11, and the two parts in parallel are respectively connected with the first The relay 5 and the second relay 12 are connected, and...
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The invention provides a bus control system used in long-distance single-core oil well logging, comprising a computer, an above-ground control box , a single core cable, a first and a second mode switches, a first and a second relays, a CPU unit, a bus control unit, a low voltage power source and a first and a second relay control units. The computer is connected with the above-ground control box via a lead; a communication unit, the CPU unit, the bus control unit, and the low voltage power source underground are connected in series by leads, and are connected in parallel with the first and the second relay control units, the two parts connected in parallel are respectively connected with the first and the second relays, and the first relay is connected with the first mode switch, and the second relay is connected with the second mode switch; the above-ground control box is connected with the first mode switch via the single core cable; the second mode switch is connected with the well logging apparatus via a lead to supply power to the apparatus. The control system adopts a single core cable to provide long distance power supply and communication for well logging, satisfies the practical needs of combined well logging by multiple apparatuses under the conditions of great voltage differences in horizontal wells.
Description
Technical field: [0001] The invention relates to a power supply control system for the combination of high and low voltage DC equipment for oil well logging. Background technique: [0002] At present, oil field logging mostly adopts the combination logging method. For the single-core DC power supply logging system, the multi-instrument combination logging generally adopts the working mode of simultaneously supplying power to all instruments. This power supply mode is very suitable when the operating voltages of the various instruments are similar, but when the operating voltages of the various instruments used in horizontal well logging are quite different, it is impossible to realize the combination of multiple logging instruments with different operating voltages. When the multi-instrument combination cannot be realized, it usually takes turns to work in which some instruments are powered on and the main circuit power supply of the other part is disconnected and dormant. ...
Claims
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IPC IPC(8): E21B47/00E21B49/00G05B15/02
Inventor 朱世和田宝岩汤剑敏金为武孙涛
Owner BC P INC CHINA NAT PETROLEUM CORP