Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method

Abstract

The invention discloses a shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and a construction method. The tubular column comprises a packer setting-releasing tubular column body and a tie-back completion tubular column body. The packer setting-releasing tubular column body comprises an up-down tool, a setting tool, a permanent type tube insert packer, a lower working cylinder, a centering guide, a cracking disc and a screen tube. An ejecting type check valve is arranged in the permanent type tube insert packer. The tie-back completion tubular column body comprises an underground hydraulic control safety valve, an upper working cylinder, a circulating slide sleeve, a centering guide and a sealed insert tube. The sealed insert tube is inserted in the packer and pushes open the ejecting type check valve to form a production channel. When needing to be taken out, the tie-back completion tubular column body is lifted up and rotates forwards, the sealed insert tube retreats out of the packer, and the ejecting type check valve is automatically closed. By arranging the ejecting type check valve in the permanent type tube insert packer, after a well shaft is packed by the packer, an upper well shaft is under no pressure; the tubular column can be lifted up and put down through a conventional workover rig, construction efficiency is improved, and under-pressure construction expanses are saved.

Description

technical field

[0001] The invention relates to the field of shale gas development in the petroleum and natural gas industry, in particular to a shale gas well unsnubbed production pipe string without snubbing and a construction method. Background technique

[0002] In the process of oil and gas exploitation, in order to meet the liquid carrying, casing protection and safety production requirements of shale gas wells, it is necessary to complete the production strings of shale gas wells. The existing oil shale gas well completion string and construction method (the method of lifting the production string under pressure, patent number: 201310388632.5) can only realize the lifting and lowering of the bare oil pipe under pressure, but such a string cannot meet the requirements for the production string. Casing protection and shale gas well safety and production requirements require high construction costs and long periods. Other pipe strings and methods (oil and gas well compl...

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