Autonomous junk collecting sleeve for a riser
AssigneeWellbore Specialties, LLC
InventorDennis J. Penisson
Life of this patent
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Abstract
An autonomous junk collecting sleeve for a riser is provided. The sleeve is constructed and arranged to be independently lowered and seated above a subsea tree section and, subsequently, raised and removed independent of the work string. The autonomous junk collecting sleeve includes a first cylindrical structure, a second cylindrical structure concentric to the first cylindrical structure and which are joined together in spatial relation at a bottom end to form an interior J-channel basket. The J-channel basket is operable to collect debris traveling up through the bottom end and over of the second cylindrical structure for deposit therein.
Claims7
A method of cleaning a wellbore comprising:
- cleaning a riser from an upper surface to a subsea tree section;
- lowering an autonomous junk collecting sleeve at a seat of the riser;
- installing a work string through the riser and the autonomous junk collecting sleeve to a depth of the wellbore, the work string being independent of the sleeve;
- cleaning a wellbore with the work string;
- and
- collecting debris from the wellbore in the autonomous junk collecting sleeve, simultaneously with the cleaning of the wellbore.
Dependencies are inferred from the claim text.