Long-range single-cord well logging bus control system
A bus control, long-distance technology, applied in general control system, control/regulation system, computer control, etc., can solve problems such as control circuit aging, inability to realize multi-instrument combination, and affecting normal logging operations
Active Publication Date: 2008-06-18
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At present, because the control circuit used for this kind of alternate working mode is aging and outdated, its concentration is not high, and the failure rate is high, which affects the normal progress of logging operations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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[0012] The present invention is provided by the following embodiments, which will be described below in conjunction with the accompanying drawings.
[0013] Such as figure 1 Shown, the present invention consists of computer 1, ground control box 2, single-core cable 3, mode switch 4 (K 1 ), 9(K 2 ), relays 5, 12, communication unit 6, CPU unit 7, bus control unit 8, low-voltage power supply 10, and relay control unit 11. Part of the communication unit 6, CPU unit 7, bus control unit 8, and low-voltage control power supply 10 are connected in series through wires and connected in parallel with the relay control unit 11. Mode switch 4(K 1 ) and mode switch 9 (K 2 ) are connected; the ground control box 2 is connected to the switch 4 (K 1 ) phase connection, switch 9 (K 2 ) to supply power to each instrument by connecting with the logging instrument through wires.
[0014] Such as figure 2 As shown, the circuit of the system for the power supply control of the horizontal...
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The invention provides a bus control system used in long-distance single-core oil well logging, comprising a computer 1, an above-ground control box 2, a single core cable 3, mode switches 4 and 9, relays 5 and 12, a CPU unit 7, a bus control unit 8, a low voltage power source 10 and a relay control unit 11. The above-ground computer 1 is connected with the above-ground control box 2 via a lead; an underground communication unit 6, the CPU unit 7, the bus control unit 8, and the low voltage power source 10 are connected in series by leads, and are connected in parallel with the relay control unit 11, wherein the two parts connected in parallel are respectively connected with the relay 5 and the relay 12, and the relay 5 and the relay 12 are respectively connected with the mode switch 4 and the mode switch 9; the above-ground control box 2 is connected with the switch 4 via the single core cable 3; the switch 9 is connected with the well logging apparatuses via a lead to supply power to the apparatuses. The control system adopts a single core cable to provide long distance power supply and communications for well logging, satisfying 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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Login to View More 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