Corrosion monitoring device and pipe column for corrosion monitoring of water injection well

Abstract

The invention discloses a corrosion monitoring device and a pipe column for corrosion monitoring of a water injection well. The corrosion monitoring device comprises a fixed piece, a monitoring core,and a blocking core, wherein the fixed piece comprises an upper joint, an upper connection tube connected with the upper joint, a fixed body connected with the upper connection tube, a guide tube against the upper joint and the fixed body, a lower connection tube connected with the fixed body, and a lower joint connected with the lower connection tube, the fixed body is provided with an eccentrichole, a first monitoring through hole communicated with the eccentric hole, and a second monitoring through hole enabling the eccentric hole to communicate with an inner cavity of the fixed body, theguide tube is provided with a guide groove communicated with the eccentric hole, the monitoring core comprises a first casting and fishing piece, and a monitoring body connected with the first castingand fishing piece, the monitoring body is provided with a first monitoring piece exposed in the first monitoring through hole and a second monitoring piece exposed in the second monitoring through hole, the blocking core comprises a second casting and fishing piece and a blocking piece connected with the second casting and fishing piece, and the blocking piece is used for blocking the eccentric hole.

Description

technical field [0001] The invention relates to the field of oil production engineering, in particular to a corrosion monitoring device and a pipe string used for corrosion monitoring of water injection wells. Background technique [0002] During the exploitation of oil and gas reservoirs, water injection wells are usually used to inject water into the oil and gas reservoirs. Among them, most of the water sources required for water injection development of oil and gas reservoirs come from self-produced sewage, which will cause certain corrosion to the downhole equipment of water injection wells (such as packers and water distributors), and in severe cases will affect the safety of operations. Therefore, it is necessary to provide a corrosion monitoring method for water injection wells. [0003] At present, metal coupons are usually placed in indoor simulated water for a period of time, and then the method of metal weight loss is used to calculate the corrosion efficiency of...

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Problems solved by technology

[0005] The monitoring methods provided above cannot truly reflect the influence of various factors such as water quality, downhole temperature, downhole pressure, and flow velocity of multiphase fluids on the corrosion of downhole equipment in water injection wells, and thus cannot effectively monitor the corrosion degree of downhole equipment in water injection wells. to monitor

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