Danmarks Energiforsyning 1990-2005: Traditionelt Og Reduceret
Author
Asger Hansen
ISBN #
8787585057
Us Patents
Safety Shear Apparatus And Method For Production Wells
US Patent:
45315850, Jul 30, 1985
Filed:
Sep 12, 1983
Appl. No.:
6/531553
Inventors:
Asger Hansen - Houston TX
International Classification:
E21B 3306
US Classification:
166297
Abstract:
An apparatus and method for shutting in a well in the event all other control equipment on the well fails to close and hold. The apparatus includes a lower and upper tubing head in which the tubing extends from the well upwardly through the lower head and into the upper head and sealingly engages both heads. A sealing and shear ram is positioned between the heads for shearing and sealing the tubing. The shear tubing is moved away from the shear rams after shearing to allow the rams to seal. The tubing is preferably supported from only one of the tubing heads. In one embodiment the tubing is supported initially from the upper head and after shearing the lower tubing portion moves downwardly to seat on the lower tubing head for allowing the rams to seal. In another embodiment the tubing is supported from the lower head and after shearing the upper portion of the tubing is raised to allow the shear rams to seal.
Apparatus For Use In Drilling A Well At An Offshore Location
US Patent:
49879561, Jan 29, 1991
Filed:
Aug 30, 1989
Appl. No.:
7/400075
Inventors:
Asger Hansen - Houston TX Martin J. Kelly - Houston TX
International Classification:
E21B 2912
US Classification:
166361
Abstract:
Apparatus is disclosed for use in drilling an offshore well wherein a drill string suspended from a drill ship for extension within a riser pipe, lower marine riser package and subsea wellhead including a blowout preventer stack may be sheared at a location intermediate the lower end of the riser pipe and a flex or ball joint of the riser package.
