| 摘要 |
oil and gas producing industry; applicable in sealing of members of casing heat at wellhead, isolation of casing string - borehole annulus and other similar operations arising in drilling and operation of oil and gas wells. SUBSTANCE: sealing composition includes elastomer based on rubber with functional filler and additional mixture of esters with calcium salts of alkylarylsulfonic acids, solid filler of colloid size - calcium carbonate or hydroxide with particles sizing less than 1 mcm. In so doing, mixture of esters with calcium salts of alkylarylsulfonic acids is used in ratio of 1: 30. Said composition has improved plastic properties required for isolation of casting string - borehole annulus in drilling and operation of oil and gas wells under conditions of high content of aggressive acid gases, for instance, hydrogen sulfide. EFFECT: higher efficiency of sealing composition application. 2 cl, 3 tbl, 1 ex
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