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Device and method for metering gas volume of oil-well sleeve gas

A technology of oil well casing and gas flowmeter, which is applied in the directions of measurement, earthwork drilling, wellbore/well components, etc. It can solve the problem of no display of the instrument, achieve accurate measurement of pulsating flow, reduce workload and errors, and facilitate processing Effect

Inactive Publication Date: 2018-03-20
BC P INC CHINA NAT PETROLEUM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this instrument also has certain deficiencies, which are mainly manifested in: when the casing gas flow is small (less than 1.5m 3 / h), this instrument does not display, and this method cannot be used to test oil wells with small flow casing gas

Method used

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  • Device and method for metering gas volume of oil-well sleeve gas
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  • Device and method for metering gas volume of oil-well sleeve gas

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Embodiment 1

[0043]This embodiment provides a gas metering device for oil well casing, the structure of which is as follows: figure 1 As shown, the device includes:

[0044] Interface hose 1, multi-effect steady flow detection tube 2, Doppler ultrasonic gas flow meter 3,

[0045] One end of the interface hose 1 is connected to the oil well casing, and the other end of the interface hose 1 is connected to the multi-effect steady flow detection tube 2; the multi-effect steady flow detection tube 2 is used for the stable passage of oil well casing gas;

[0046] A first short tube 4 and a second short tube 5 are arranged on both sides of the outer wall close to the outlet end of the multi-effect steady-flow detection tube 2, extending obliquely outward at an angle of 45° to the outer wall of the multi-effect steady-flow detection tube 2, as figure 2 As shown, the two detection probes of the Doppler ultrasonic gas flowmeter 3 are respectively inserted into the first short pipe 4 and the secon...

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Abstract

The invention provides a device and method for metering the gas volume of oil-well sleeve gas. The device comprises a port flexible pipe, a multiple-effect constant-current detection pipe and a gas flow meter, wherein one end of the port flexible pipe is connected with an oil-well sleeve, and the other end of the port flexible pipe is connected with the multiple-effect constant-current detection pipe; the multiple-effect constant-current detection pipe is used for enabling the oil-well sleeve gas to stably pass through; two fixing clamps are arranged on the outer wall of the multiple-effect constant-current detection pipe and used for fixing two detection probes of the gas flow meter. The invention also provides a method for metering the gas volume of the oil-well sleeve gas with the device. According to the device and method, the gas volume of sleeve gas with different pipe diameters, different pressures and different flows can be rapidly assessed at an oil-well opening.

Description

technical field [0001] The invention relates to a metering device and method, in particular to a metering device and method for oil well casing gas volume, and belongs to the technical field of oil and gas field environmental protection. Background technique [0002] For a long time, controlling casing gas has been one of the urgent problems to be solved in oilfield surface engineering. Oil well casing gas is a kind of oilfield associated gas, accounting for more than half of the total associated gas. If the casing gas cannot be discharged in time, it will have a great impact on crude oil production. The conventional way to eliminate the influence of casing gas is to use the constant pressure release valve to inject oil into the oil pipe for mixed transportation. However, when the constant pressure release valve is not suitable or there is no oil pipe system, in most cases, the casing valve has to be opened to discharge the casing gas to the atmosphere. Doing so not only ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B47/00
CPCE21B47/00
Inventor 崔翔宇范俊欣翁艺斌徐文佳薛明王文思
Owner BC P INC CHINA NAT PETROLEUM CORP
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