Research and Application of Early Prevention and Sealing Tools for Annular Pressure
The early prevention and sealing tools for annular pressure in gas storage and other gas wells were introduced.The first and second bonding surfaces are effectively sealed by hydraulic pressure,and the micro cracks are compensated and sealed by self expanding materials to prevent oil and gas from flowing up.The shock absorption anchoring mechanism is used to reduce the im-pact of pipeline vibration on the sealing effect of the rubber cylinder.By using numerical simula-tion methods to simulate and analyze the key structure of the tool,the sealing capacity can reach over 50 MPa,and the maximum anchoring force of the anchoring damping mechanism for P110 casing is less than 600 kN.The damping effect is obvious,and the tool function and analysis results have been effectively verified through on-site tests.The prevention effect of wellbore an-nular pressure is obvious,and the problem of annular pressure has been improved.
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