ROTATABLE SEALING ASSEMBLIES

The invention relates to a method and apparatus suitable for angularly adjusting an attachment member to be sealed to a bore, for example a wellhead body (2) in the bore of a conductor (4). The attachment body (2) is to be sealed through the intermediary of a housing (6) and a metal-to-metal wedge s...

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Bibliographic Details
Main Authors BRIAN MACINTYRE, FRANK CLOSE, SEAN MCAVOY
Format Patent
LanguageEnglish
Published 08.04.1992
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:The invention relates to a method and apparatus suitable for angularly adjusting an attachment member to be sealed to a bore, for example a wellhead body (2) in the bore of a conductor (4). The attachment body (2) is to be sealed through the intermediary of a housing (6) and a metal-to-metal wedge seal. A support ring (14) encircling the external peripheral surface of the housing (6) is movable between two axially spaced positions on the peripheral surface, and movable pins are provided to maintain the support ring (14) in a first, out-of-the-way position until the housing (6) is positioned in the bore (4) mouth, the pins (9) being releasable to permit axial movement of the annular support member ring (14) from the first position towards a second position in which the member body (2) is in direct contact with the bore mouth. There are further provided ball bearings (8) for permitting rotation between the body (2) and the housing (6) prior to the support ring (14) taking up its second position, the pins (9), when withdrawn, then acting to immobilize rotation between the body (2) and the housing (6). Screws (26) are then used in a conventional manner to energize the sealing device when the support member ring (14) is in its second position.
Bibliography:Application Number: GB19890016756