FIELD: oil and gas production.
SUBSTANCE: device consists of circular locking end passing radially from upper edge of caisson and attached to it, of support unit positioned coaxially around upper part of caisson under locking end and containing steel upper pressure ring, steel lower pressure ring and laminated structure out of alternate steel and elastomer flexible rings located between upper and lower pressure ring and interconnected for mutual bend as one unit not slipping relative to each other. The laminated structure of the support unit bears vertical tensile loads applied under weight of the caisson onto the case, and at the same time it matches angular loads applied between the caisson and case.
EFFECT: increased service life of device.
4 cl, 9 dwg
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