The invention relates to an oil
nozzle sleeve connector, a gas injection
wellhead fluid monitoring pipeline and
system. The oil
nozzle sleeve connector includes an inner
pipe part and an outer
pipe part, wherein the inner
pipe part penetrates into an inner hole of the outer pipe part, an inner
diameter of the outer pipe part is larger than at least part of an outer
diameter of the inner pipe part,one end of the inner pipe part extends into a step inner hole of the oil
nozzle sleeve and is connected with the step inner hole in a sealed mode, the other end of the inner pipe part is used for connecting the gas injection
wellhead fluid monitoring pipeline, one end of the outer pipe part extends into a step outer hole of the oil nozzle sleeve and is connected with an opening of the step outerhole in a sealed mode, an injection fluid
accommodation space is formed between the inner wall of the outer pipe part and at least part of the outer wall of the inner pipe part and the inner walls ofthe step outer hole of the oil nozzle sleeve, the other end of the outer pipe part enables the injection fluid
accommodation space to be closed, and a connection opening communicating with the fluid
accommodation space is formed in the outer wall of the outer pipe part and used for connecting the loop wire part of the gas injection
wellhead fluid monitoring pipeline. According to the oil nozzle sleeve connector, the gas injection wellhead fluid monitoring pipeline and
system, the injection of limited flow is realized when injecting into the wellhead is carried out, precision is high, a response is fast, and the regulation efficiency is improved.