Shale gas well no-killing production tubular column capable of being lifted up and put down under no pressure and construction method
A technology for shale gas wells and production pipe strings, which is applied to wellbore/well components, wellbore/well valve devices, drilling pipes, etc. Due to the difficulty of pipeline crossing and high construction costs, the effect of avoiding construction risks and costs, avoiding energy losses and safety accidents, and saving operating costs
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[0036] The present invention will be further described below in conjunction with the drawings.
[0037] This embodiment provides a shale gas well snubbed and unsqueezed production string, including a packer setting-dropping string and a tie-back completion string.
[0038] Such as figure 1 As shown, the packer setting-dropping pipe string includes a lifting tool, a setting tool 2, a permanent intubation packer 3, a lower working cylinder 5, and a centralizer 6, which are sequentially connected from top to bottom. Rupture disc 7, screen 8; the lifting tool is a cable or coiled tubing 1, when the setting tool is cable running, the gunpowder is set, and when the coiled tubing is used, the setting tool is hydraulically set. Such as image 3 As shown, the permanent intubation packer 3 includes a drop joint 17, a center tube 16, a slip 18 sleeved on the center tube, a cone 19, a rubber tube protection mechanism 20, a rubber tube 21, and a center tube A top-opening check valve and a lowe...
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