Rapid induced flow completion pipe column for subsurface nitrogen making gas well

Abstract

The invention discloses a rapid induced flow completion pipe column for a subsurface nitrogen making gas well. The rapid induced flow completion pipe column for the subsurface nitrogen making gas well is mainly formed by a mandrel hanger, an oil tube, a subsurface safety valve, a production packer, a working barrel, an insertion positioning seal, a blind tube and a subsurface nitrogen induced flow device; the upper end of the oil tube hangs inside an oil well through the mandrel hanger; the subsurface safety valve, the production packer and the working barrel are respectively arranged on the oil tube; the lower end of the oil tube is connected with the blind tube through the insertion positioning seal; the insertion positioning seal is inserted inside a sealing cylinder of a sand control packer inside the oil well; the subsurface nitrogen making induced flow device is inserted to the blind tube; the subsurface nitrogen making induced flow device is mainly formed by an ignition head, an exploder, a booster tube, a detonating cord, a gas generating agent and an outer casing; the ignition head is arranged at the top of the exploder; the exploder is connected with the detonating cord through the booster tube; the outer casing is full of the gas generating agent which is connected with the detonating cord. According to the above structural form, the rapid induced flow completion pipe column for the subsurface nitrogen making gas well has the advantages of being few in induced flow operation equipment, simple in operation process, high in efficiency, low in cost and stable and reliable.

Description

technical field [0001] The invention relates to a blowout-inducing and completion pipe string, in particular to a fast-induced blowout completion pipe string for an underground nitrogen gas well. 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 p...

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 problem existing in the gas well completion string is that the string itself does not have the function of inducing blowout, and needs to induce blowout separately. Low efficiency, high cost, high risk

[0004] At present, there is no gas well rapid induced blowout completion string, the following are the retrieved related patents

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