A fixation method for underground gas storage well bore
A fixing method and technology for gas storage wells, which are applied in the container discharge method, container filling method, gas/liquid distribution and storage, etc., can solve the problems of difficult construction, inability to fix, and accidents in the wellbore, and improve safety. performance and mission, the fixing process is simple, and the effect of coagulation is firm.
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[0012] Take the fixing of a wellbore with an effective gas storage length of 125m when the outer diameter of the wellbore is 7 as an example:
[0013] A. Down the wellbore: first use the 7-hour conduit back pressure valve for drilling in oil and gas fields as a one-way valve 4, fasten it with the bottom of the wellbore 2 through the pipe taper thread, and weld the fixing frame 5 at the lower end of the valve body; then install the wellbore 2 It is placed in the foundation well 3 with a diameter of φ215.9mm (8 h) and a depth of 128m drilled according to the petroleum and geological drilling procedures and requirements, and a flange 1 is installed on the upper mouth of the wellbore; the fixed frame 5 adopts a 1.5m long At 7 o'clock, four holes of 1000×50mm are symmetrically opened and cross-welded to the bottom of the valve through two φ30mm steel bars;
[0014] B. Install the grouting device: the intubation pipe 10 adopts a 3-hour drill pipe. First, the 3-hour connecting sle...
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