FIELD: oil and gas production.
SUBSTANCE: invention is related to oil and gas production industry and is intended for re-equipment of head in oil and gas wells when their casing pipes are located eccentrically relative to vertical axis of well. Elimination of eccentricity in axes of casing pipes is done by means of a special eccentric coupling with threads at its ends that are made eccentrically relative to each other with a value of eccentricity equal to value of axes displacement in casing pipes of well.
EFFECT: invention makes it possible to eliminate effect of casing pipes eccentricity at installed pipe flange and to match axis of installed pipe head to axis of well, and also to simplify installation of pipe heads with identified eccentricity of casing pipes without forced tension of casing pipe in horizontal plane, with preservation of its integrity and leak-tightness.
3 dwg
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| PROCEDURE FOR REPAIR OF PRODUCTION WELLS | 2009 |
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| COLUMN HEAD | 1997 |
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| TUBING-CASING ANNULUS SEALING DEVICE | 2006 |
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| DEVICE FOR CENTERING PRODUCTION STRINGS IN WELL HEAD EQUIPMENT | 1995 |
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| UNIVERSAL HEAD OF PIPE STRING | 1997 |
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| UNIVERSAL CASING HEAD FOR CONNECTIONS OF CASING STRINGS ON WELLHEAD | 1999 |
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| COLUMN HEAD | 2007 |
|
RU2348791C2 |
