At high temperature and pressure conditions of high levels of H2S and CO2, seal hydraulic seal failure mainly for swelling and aging rubber material, causing hydraulic seal shape changes, restitution, seals inelastic, seals and equipment resilient contact between stress is released, resulting in acid gas leak.

 

Sour gas leak will cause the wellbore annulus with the wellbore pressure, ground acidic gas leakage will cause environmental pollution, even when serious casualties. Currently, the hydraulic seal mechanical properties and sealing performance test limited to their former service, while often serving hydraulic seals to withstand high temperature, high pressure, high content of the corrosive effect of the acidic medium, testing its mechanical properties and sealing properties the results have only in the early completion of the reference value, and in the late mining can reliably serve no reference value.

 

At present, the hydraulic seal corrosive acid media research can rarely reported, for the present at a pressure of 60 MPa working temperature of 175 ? gas composition (volume fraction) H2S 20%, CO2 5%, CH4 75% of harsh environments, by comparing the fluorocarbon rubber and fluorosilicone rubber Tetrapropanate three kinds of fluorine rubber hydraulic seal etched with an acidic medium dimensions, mass and volume change rate, physical and mechanical properties were studied three kinds of hydraulic seal resistance corrosion, aimed at high temperature, high oil and gas fields containing an acidic medium hydraulic seal material selection to provide a theoretical reference.