Pipe column and method for rapid production recovering after gas well killing

Abstract

The invention provides a pipe column and a method for rapid production recovering after gas well killing. An oil pipe, a sliding sleeve, a packer and a blockage device are included. The lower end of the oil pipe is connected with the blockage device, the packer is arranged at the lower portion of the oil pipe, and the sliding sleeve is located above the packer and connected with the oil pipe. Thepipe column and the method have the functions that production recovering can be rapidly achieved, meanwhile, later production is achieved, the field technology is simplified, the construction efficiency is improved, and the gas well capacity is protected. After gas well killing, one-time lowering of the rapid production recovering pipe column is conducted, a runner which is low in pressure and small in drift diameter compared with a shaft is manually created for increasing the well interior gas upward return flow speed, the liquid carrying capability is improved, well bottom accumulated liquidis reduced, the well bottom return pressure is reduced, and meanwhile the later production requirement is met. The pipe column and the method have the technical advantages that production recoveringis rapid, and later production is achieved; and meanwhile, the field technology is simplified, the construction efficiency is improved, and an extremely important function is achieved for gas well capacity protection.

Description

technical field [0001] The invention relates to a pipe string and a method for rapid production resumption after a gas well is killed. Background technique [0002] For gas wells that cannot implement casing fracturing due to the use of staged cementing and need to be restructured with separate tubing fracturing tools, due to the existence of multiple packers and hydraulic anchor tools, it is difficult to pull out the pipe string in the later stage. Pulling out and then running into small-diameter tubing for production can solve this problem. The well killing operation is required to lift the pipe string. If the blowout induction is not timely after the well killing, the well killing fluid will block the bottom layer or the wellbore will accumulate fluid during the blowout replacement process, resulting in high back pressure at the bottom of the well, damaging the reservoir or "crushing" the well to death. Occurs, seriously affecting the production and life of gas wells. A...

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Problems solved by technology

[0003] In order to overcome the need for coiled tubing operation to induce jetting and drainage after on-site well killing, it is easy to be limited by the organization of coiled tubing equipment, and after fracturing, there are many drilling and drilling procedures, with a long cycle, and the effect of on-site resumption of production is not ideal. Coiled tubing requires a lot of running, which affects the production capacity of the gas well. The present invention provides a pipe string and method for rapid resumption of production after the gas well is killed. The integrated pipe string for production resumption artificially creates a flow channel with a lower pressure and smaller diameter than the wellbore, which is used to speed up the gas upflow velocity in the well, improve its liquid carrying capacity, reduce bottom-hole liquid accumulation, and reduce bottom-hole back pressure. At the same time to meet the needs of post-production

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