Anticorrosion flow guide structure for natural gas wells

Abstract

The invention discloses an anticorrosion flow guide structure for natural gas wells. The anticorrosion flow guide structure comprises a barrel, a bottom plate, a ball and an upper ball seat. A liquidinlet hole is formed inside the barrel, the bottom plate is fixed to the lower portion of the liquid inlet hole, the upper ball seat is fixed to the upper portion of the liquid inlet hole, the insideof the ball seat is communicated with the liquid inlet hole, a support shaft is arranged in the middle of the bottom plate, a spring sleeves the support shaft, a plurality of small holes are formed inthe bottom plate, a limit plate is arranged on the top of the spring, gaps are reserved between the bottom of the limit plate and the top of the support shaft, a lower ball seat is fixed onto the limit plate, and a through hole which is communicated with the liquid inlet hole is formed in the middle of the ball; a connecting shaft is rotationally arranged in a sleeve, and an end of the connectingshaft is connected with the upper portion of the ball. The anticorrosion flow guide structure has the advantages that the sizes of communication cross sections of the liquid inlet hole can be adjusted by an adjusting mechanism, accordingly, channeling oil and gas can be blocked, aggregation of wellhead overflow or well kick accidents due to oil and gas flow channeling can be prevented, and well control imbalance can be prevented.

Description

technical field [0001] The invention relates to the field of gas field exploitation, in particular to an anti-corrosion diversion structure for natural gas wells. Background technique [0002] When drilling into an oil and gas formation with abnormal high pressure, the oil flow in the high pressure oil and gas formation moves upwards under the pressure and drives the mud to the wellhead together. The upward movement of the oil flow causes drilling failure. Otherwise, the well control will be out of control. Usually, it is easy to cause a blowout accident, and the well killing operation of the high-pressure oil and gas layer is not easy to carry out, which disturbs the normal operation of drilling and production operations. Contents of the invention [0003] The object of the present invention is to provide an anti-corrosion diversion structure for natural gas wells to solve the above-mentioned defects. [0004] The present invention realizes through following technical sc...

AI Technical Summary

Problems solved by technology

[0002] When drilling into an oil and gas formation with abnormal high pressure, the oil flow in the high pressure oil and gas formation moves upwards under the pressure and drives the mud to the wellhead together. The upward movement of the oil flow causes drilling failure. Otherwise, the well control will be out of control. Usually, it is easy to cause a blowout accident, and the well killing operation of the high-pressure oil and gas layer is not easy to carry out, which disturbs the normal operation of the drilling production operation.

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