Underground nitrogen-making induced flow completion pipe string having pressure monitoring function

Abstract

The invention discloses an underground nitrogen-making induced flow completion pipe string having a pressure monitoring function. The underground nitrogen-making induced flow completion pipe string is mainly composed of an oil pipe hanging part, an oil pipe, an underground safety valve, an underground pressure meter, a production packer, a working cylinder, an inserting positioning seal, a blind pipe and an underground nitrogen-making induced flow device. The upper end of the oil pipe is hung in an oil well through the oil pipe hanging part. The underground safety valve, the underground pressure meter, the production packer and the working cylinder are arranged on the oil pipe. The lower end of the oil pipe is connected with the blind pipe through the inserting positioning seal which is inserted into a sealing cylinder of a sand control packer in the oil well. The underground nitrogen-making induced flow device is inserted into the blind pipe. Due to adoption of the above structure, after a first safety shield of a gas well is built, a Christmas tree is assembled, and setting and seal examination are carried out on the production packer until the production packer is qualified, a large amount of nitrogen can be rapidly generated through dropbar excitation and the gas well is induced. Besides, in the long-term production process, the underground pressure is monitored in real time. The underground nitrogen-making induced flow completion pipe string has a good application and popularization prospect.

Description

technical field [0001] The invention relates to a blowout-inducing completion pipe string, in particular to an underground nitrogen-generating induced blowout completion pipe string. Background technique [0002] At present, offshore gas wells are usually run into completion strings first, and then blowout induction is performed separately, and the completion string itself does not have the function of induction blowout. Coiled tubing nitrogen injection is usually used to induce blowout in offshore gas wells. This technology needs to connect nitrogen (liquid nitrogen) equipment and coiled tubing equipment on the drilling platform. There are many operating equipment, complex operating procedures, long operating time, high operating costs, and relatively high risks. In addition, there are small-diameter tube nitrogen induced injection technology and multi-stage gas lift column induced injection technology. The advantages and disadvantages of the small-diameter pipe nitrogen...

AI Technical Summary

Problems solved by technology

The multi-stage gas-lift string injection technology is limited by the air-tightness of the gas-lift valve in the long-term production process, and at the same time has poor flexibility, so it is rarely used at present

[0003] At present, the common problems of gas well completion pipe strings are that the pipe string itself doe

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