Ocean well completion gas production string mechanical property experimental device and experimental method

Abstract

The invention discloses an ocean well completion gas production string mechanical property experimental device and an experimental method. The device comprises a water reservoir, wherein a bottom shell is arranged below the water reservoir, two hydraulic cylinders with pushing and pressing plates are arranged on the inner side wall of the bottom shell correspondingly, a formation-simulating filling material is arranged between the two pushing and pressing plates, a test pipe is arranged in the formation-simulating filling material, one end of the test pipe is arranged in the water reservoir, and the other end of the test pipe is arranged on the outer side surface of the bottom shell; and a strain gauge is arranged on the outer surface of the test pipe, a gas storage tank is arranged outside the water reservoir, a gas conveying pipe which enables the gas storage tank to communicate with the test pipe is arranged between the water storage tank and the other end of the test pipe, a firstwater pump and a second water pump are arranged outside the water reservoir, and water conveying pipes are arranged between the first water pump and the water reservoir and between the second water pump and the water reservoir correspondingly. The device and the method have the beneficial effects that data of vibration and deformation generated through the ocean well completion gas well string aremeasured, vibration and deformation of the string are controlled, and the stability and the high efficiency of the ocean oil and gas conveying work are ensured.

Description

technical field [0001] The invention relates to the technical field of natural gas exploitation, in particular to an experimental device and an experimental method for the mechanical properties of an offshore well completion gas production string. Background technique [0002] In the traditional offshore oil and gas extraction technology, the high-yield well completion gas well string in the ocean environment is the circulation channel of high-speed gas. The gas pipe string will cause its own vibration and bending deformation to a certain extent. When the vibration is severe and the bending is excessive, it is easy to cause the fracture of the offshore well completion gas production pipe string, which not only cannot continue to transport oil and gas from the seabed formation, but also increases additional maintenance costs. The leakage of oil and gas into the ocean causes environmental pollution, which has a great negative impact in the process of exploiting marine oil and ...

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Problems solved by technology

[0002] In the traditional offshore oil and gas extraction technology, the high-yield well completion gas well string in the ocean environment is the circulation channel of high-speed gas. The gas pipe string will cause its own vibration and bending deformation to a certain extent. When the vibration is severe and the bending is excessive, it is easy to cause the fracture of the offshore well completion gas production pipe string, which not only cannot continue to transport oil and gas from the seabed formation, but also increases additional maintenance costs. The leakage of oil and gas into the ocean causes environmental pollution, which has a great negative impact in the process of exploiting marine oil and gas

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