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A method and device for underground cableless AC and DC power transmission in oil and gas fields

A technology of power transmission and AC and DC voltage, which is applied in the direction of output power conversion devices, electrical components, etc., to achieve the effect of simple construction and low construction cost

Active Publication Date: 2017-09-05
BEIJING JINKELONG PETROLEUM TECH DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in downhole cable power supply and battery power supply, the present invention provides a cable-free AC and DC power transmission method and device for downhole oil and gas fields

Method used

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  • A method and device for underground cableless AC and DC power transmission in oil and gas fields
  • A method and device for underground cableless AC and DC power transmission in oil and gas fields
  • A method and device for underground cableless AC and DC power transmission in oil and gas fields

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Embodiment 1

[0046] An AC / DC power transmission device for underground cables in oil and gas fields, consisting of nine parts, including power downlink equipment A, wellhead sealing cover B, insulating isolation sleeve C, wellbore casing D, tubing E, and lower isolation connector F, power feeder short-circuit nipple G, downhole power receiver circuit H and circuit sealing cabin body I. The power downlink device A is connected to the wellhead sealing cover B and the wellbore casing D, and the insulating isolation sleeve C insulates the wellhead sealing cover B, oil pipe E and wellbore casing D at the wellhead The lower isolation connector F insulates the oil pipe E from the circuit sealing cabin I at the tail of the oil pipe, and the power feeding short-circuit nipple G realizes the connection between the wellbore casing D and the circuit sealing cabin I. The electrical connection of the downhole power receiver circuit H is located inside the circuit sealing cabin I and is connected to the ...

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Abstract

The invention discloses an underground cable-free AC / DC power transmission method and device for an oil and gas field. According to the method, existing facilities of a water injection, oil extraction and gas production well, such as an oil pipe and a well cylinder sleeve pipe, are used for building a power transmission passage for transmitting high-power electricity to a part under the well; and high-power DC, AC or AD / DC hybrid modulation electricity is transmitted to the part under the well from the ground by a power downloading device arranged on the ground and a power receiver circuit arranged under the well based on the power transmission passage so as to drive the underground power device or an execution mechanism to rotate. The device comprises the power downloading device, a wellhead sealing cover plate, an insulation isolation sleeve, the well cylinder sleeve pipe, the oil pipe, a lower isolation connector, a power feed short circuit short node, the underground power receiver circuit and a circuit sealing cabin. The underground cable-free AC / DC power transmission method and device has the advantages that a cable is not needed to be laid, the construction is simple, the construction cost is low, and stable high-power electricity can be continuously provided for the underground device and the executing mechanism.

Description

technical field [0001] The invention relates to the technical field of power transmission methods and equipment, in particular to a cable-free AC and DC power transmission method and device for downhole oil and gas fields. Background technique [0002] At present, in oil, shale gas and coalbed methane water injection and oil and gas production wells, a series of electromagnetic components such as electric motors, solenoid valves, and electromagnets are used more and more. These electric drive tools are mostly powered by batteries. or cable powered. If a cable is used to power downhole electric drive tools, the cable must be lowered into the wellbore together with the tubing, and the cable is laid between the tubing and the casing. During the cable laying operation, the cable lowered with the tubing may rub against the casing and cause The cable is damaged, especially when the cable is laid in a deviated well with a large inclination angle, and when the cable passes through ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/10
CPCH02M1/10
Inventor 周晓东
Owner BEIJING JINKELONG PETROLEUM TECH DEV
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