TUBING HANGER LANDING STRING WITH BLOWOUT PREVENTOR OPERATED RELEASE MECHANISM
A coupling is incorporated in the landing string which is non-destructively unlatched by the closure of BOP pipe rams. The coupling is simple and reliable to operate in emergencies. When the pipe rams are closed, the radial force releases a mechanism comprising captive pins and an outwardly biased s...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | A coupling is incorporated in the landing string which is non-destructively unlatched by the closure of BOP pipe rams. The coupling is simple and reliable to operate in emergencies. When the pipe rams are closed, the radial force releases a mechanism comprising captive pins and an outwardly biased split ring. The split ring is compressed inwardly, releasing shoulders on collet fingers from beneath an undercut in a bore of the coupling. Reconnection is simply achieved by re-engaging the collet fingers in the undercut. Other BOP closure element non-destructively operated landing string couplings are also disclosed. |
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