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

Abstract

The invention discloses a corrosion monitoring device and a pipe string used for corrosion monitoring of a water injection well. The corrosion monitoring device includes a fixing piece, a monitoring core, and a plugging core; the fixing piece includes an upper joint, an upper connecting cylinder connected to the upper joint, The fixed body connected with the upper connection cylinder, the upper joint against the guide cylinder against the fixed body, the lower connection cylinder connected with the fixed body, and the lower joint connected with the lower connection cylinder; the fixed body is provided with an eccentric hole and an eccentric The first monitoring through hole through which the hole penetrates, and the second monitoring through hole used to make the eccentric hole communicate with the inner cavity of the fixed body; the guide cylinder is provided with a guide groove that communicates with the eccentric hole; the monitoring core includes the first fishing part, The monitoring body connected with the first fishing part; the monitoring body is provided with the first monitoring part for exposing the first monitoring through hole and the second monitoring part for exposing the second monitoring through hole; the plugging core includes the second The fishing part and the blocking part connected with the second fishing part; the blocking part is used to block 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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