Fine pressure control well cementing operation method
A fine and cementing technology, which is applied in earthwork drilling, wellbore/well components, sealing/isolation, etc., to achieve fine control of wellhead pressure, ensure downhole pressure, and improve cementing quality
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[0026] As shown in the figure, as the best embodiment of the present invention, its steps include:
[0027] Step 1: Prepare the wellhead sealing device matching the outer diameter of the running string;
[0028] Step 2: Use conventional cementing software to optimize the design of precise pressure-controlled cementing construction parameters to ensure that the bottom hole pressure is within the safe operating density window;
[0029] Step 3: Run the cementing string under pressure to the design well depth according to the design of fine pressure-controlled cementing, turn on the pump to circulate exhaust, and adjust the density of the drilling fluid in the wellbore to the design value;
[0030] Step 4: After the density of the drilling fluid in the wellbore is stable, stop the pump, add pressure at the wellhead through the fine pressure control surface equipment to ensure the stability of the downhole pressure, and connect to the cementing construction equipment;
[0031] Ste...
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