Novel underground motor drive circuit

An underground motor and drive circuit technology, applied in the direction of motor generator/starter, starter of a single DC motor, etc., can solve the problems of short-circuit contact can not be released, the time of pin power is not synchronized, and the circuit is damaged. High working voltage, wide supply voltage range and reliable work

Inactive Publication Date: 2012-12-26
CHINA PETROLEUM & CHEM CORP +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is: the relay is a contact element, and the power-on time of each pin is not synchronized after passing through the logging cable during work, causing the short-circuit contact to be welded and cannot be released, and the circuit is damaged

Method used

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Embodiment Construction

[0033] Below in conjunction with accompanying drawing, the present invention is described in further detail:

[0034] The principle of the present invention is as image 3 As shown, a novel downhole motor drive circuit, the circuit is an H-type circuit, including a logic control circuit and a double-bridge conduction circuit;

[0035] Wherein, the logic control circuit includes: a forward rotation control circuit and a reverse rotation control circuit;

[0036] The double-bridge conduction circuit includes an A-bridge drive output circuit and a B-bridge drive output circuit ( image 3 The two bridges A and two bridges B are used to illustrate the direction of the current), the A bridge drive output circuit and the B bridge drive output circuit are distributed on the bridge arm of the H-type circuit at intervals, and the motor is driven by the A bridge Drive the output circuit or be driven by the B bridge drive output circuit;

[0037] The power supply of the ground system p...

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Abstract

The invention provides a novel underground motor drive circuit, and belongs to the field of drive control of logging instruments for an oil well, a gas well and a water well and various intelligent underground tool motors. The novel underground motor drive circuit is an H type circuit, which comprises a logical control circuit and a dual-bridge circuit conducting circuit, wherein the logical control circuit comprises a positive rotating control circuit and a negative rotating control circuit; the dual-bridge circuit conducting circuit comprises an A bridge circuit drive output circuit and a B bridge circuit drive output circuit; a motor is driven via the A bridge circuit drive output circuit or the B bridge circuit drive output circuit; the motor is positively rotated and negatively rotated or stopped by adding different negative working voltages, so as to control a current collecting umbrella to be opened and closed. With the adoption of the novel underground motor drive circuit, the contact change-over can be saved; a well can be measured with a plurality of parameters; the novel underground motor drive circuit is wide in the scope of power supply voltage, simple in operation, and reliable in work, and has the capacity of providing higher working voltage and larger driving current to the motor under a high temperature condition; and the novel underground motor drive circuit is suitable for being applied to controlling the drive of the logging instruments for the oil well, the gas well and the water well and various intelligent underground tool motors.

Description

technical field [0001] The invention belongs to the field of drive control of downhole logging instruments for oil, gas and water wells and various intelligent downhole tool motors, and in particular relates to a novel downhole motor drive circuit. Background technique [0002] At present, the downhole logging tools used in domestic oil, gas and water wells are mostly multi-parameter logging tools, in which the flow and water cut instruments use umbrella-type current collectors to collect current, and measure flow and water cut at fixed points, usually controlled by a motor drive circuit The opening and closing of the collecting umbrella. [0003] The motor drive methods used in the past mainly include: negative voltage umbrella opening, positive voltage umbrella closing and relay control negative voltage opening and closing umbrella two ways. [0004] Among them, such as figure 1 As shown, the working principle of the motor drive circuit with negative voltage umbrella ope...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P1/22
Inventor 谢小辉祁荣赵忠健贺冬
Owner CHINA PETROLEUM & CHEM CORP
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