Development of Direct-reading Measurement-adjustment Eccentric Constant-flow Water Distributor

doi:10.3969/j.issn.1006-6535.2020.05.023

Abstract

Abstract: In the separate injection of highly-inclined wells in Jidong Oilfield, the conventional eccentric water distributor has the problems of dropping-fishing difficulty and low measurement-adjustment success rate, while the ordinary concentric water distributor has the problems such as low qualified rate of water distribution when injection volume is small, difficult to keep water injection volume constant, and large measurement-adjustment torque. For this reason, a new type of direct-reading measurement-adjustment eccentric constant-flow water distributor was developed. The water distributor was designed with a V-shaped faucet, a small diameter ceramic plunger and an eccentric regulating valve. The opening of the faucet was adjusted by a gear transmission method, which reduced the leakage flow and improved the adjustment accuracy of water injection. A constant-flow control mechanism was designed to eliminate the influence of water injection pressure fluctuations and realize constant water injection. Bridge channels were designed to continuously provide water flow channels under different working conditions. The water distributor has the advantages such as precise distribution with small injection volume, constant measurement and adjustment, high measurement-adjustment efficiency, and constant water injection volume. The water distributor was applied to 25 highly-inclined wells in Jidong Oilfield, with a measurement-adjustment success rate of 97.6%, and distribution qualified rate of 92.7%, which realized efficient and accurate measurement, adjustment and constant-flow water injection. This technology can meet the needs of highly-inclined wells for multi-stage injection and high-efficiency measurement and adjustment, and can improve the water injection effect.

Key words: water distribution, water distributor, eccentric, constant flow, measurement and adjustment, Jidong Oilfield

CLC Number:

TE928

Xiao Guohua, Huang Xiaomeng, Li Huijie, Guan Haifeng. Development of Direct-reading Measurement-adjustment Eccentric Constant-flow Water Distributor[J]. Special Oil & Gas Reservoirs, 2020, 27(5): 151-156.

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