SEALING COMPOSITION FOR WELL REPAIR AND ISOLATION OPERATIONS

• Main Authors: TOKUNOV V.I, FILIPPOV A.G, GERAS'KIN V.I, POLJAKOV G.A, PROKOPENKO V.A, SHEVJAKHOV A.A, TSKHAJ V.A, POLJAKOV I.G, RYLOV E.N, KUNAVIN V.V, FATTAKHOV Z.M
• Format: Patent
• Language: English
• Published: 20.06.2002
• Edition: 7
• Subjects: ADHESIVES; CHEMISTRY; DYES; EARTH DRILLING; EARTH DRILLING, e.g. DEEP DRILLING; FIXED CONSTRUCTIONS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MINING; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS; PAINTS; POLISHES

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