Oil and gas well-used rupture disk performance testing and evaluating device

Abstract

The invention discloses an oil and gas well-used rupture disk performance testing device, which comprises an experimental casing group. The casing group comprises a first-layer casing; one end of the first-layer casing is connected with a testing casing pup joint; a rupture disk is fixed on the testing casing pup joint; two ends of a testing inner cylinder, a second-layer casing and an outer cylinder are respectively connected with sealing couplings; the sealing couplings at two ends of the testing inner cylinder are respectively provided with a first-layer casing liquid inlet and a first-layer casing liquid outlet; the sealing couplings at two ends of the second-layer casing are respectively provided with a second-layer casing liquid inlet and a liquid outlet; the sealing coupling at the upper end of the outer cylinder is provided with a seawater inlet and outlet; the first-layer casing liquid inlet and the first-layer casing liquid outlet are communicated through a first high pressure connection pipeline connecting first pressurization equipment and a water tank; and the second-layer casing coupling liquid inlet and the liquid outlet are communicated through a second high pressure connection pipeline connecting second pressurization equipment and the water tank. The device of the invention is used for testing and evaluating performance of the oil and gas well-used wellbore pressure control rupture disk.

Description

technical field [0001] The invention relates to a performance test and evaluation device for rupture discs used in oil and gas wells, which is used to prevent oil and gas field exploitation operations under high temperature and high pressure conditions, especially the casing protection technology for deepwater oil and gas well exploitation operations, and can solve casing collapse under high temperature and high pressure conditions in deep water , Casing rupture disc research and development and other engineering issues, to provide protection measures for the wellbore safety of oil and gas well production. Background technique [0002] Due to the influence of water depth, the temperature of the seabed and shallow formations is low, while the temperature of the reservoir fluid is relatively high. In the early hours of oil and gas well testing and production, the annulus of each layer of casing will be sealed due to the flow of oil and gas in the wellbore The temperature of th...

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Problems solved by technology

[0002] Due to the influence of water depth, the temperature of the seabed and shallow formations is low, while the temperature of the reservoir fluid is relatively high. In the early hours of oil and gas well testing and production, the annulus of each layer of casing will be sealed due to the flow of oil and gas in the wellbore The temperature of the fluid in the space increases significantly. As the test or production time continues, the temperature of the wellbore can rise by nearly 100 degrees, which will lead to a sharp increase in the pressure in the confined space, which will seriously damage the integrity of the wellbore

At present, most of the wellbore temperature and pressure measurements in offshore oil and gas wells use on-site measurement points and theoretical predictions. Due to insufficient understanding of wellbore temperature and pressure in offshore oil and gas wells, the wellbore annular pressure prevention and control technology is still at the prediction stage, and there is a lack of accurate experimental research. Therefore, As an important wellbore annular pressure safety control technology, the research on rupture disks for oil and gas wells needs to be studied. The performance test and evaluation device for oil and gas well rupture disks can realize the calculation of wellbore thermal deformation. Optimized design provides accurate and reliable test data

[0003] At present, there is a lack of rupture disk performance testing devices in China, which leads to unclear starting pressure of rupture disks and inaccurate processing technology. Colleagues also greatly limit the improvement of rupture disk structure, and the development is greatly restricted.

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