US 2012/0267116 A1Published application

Flange overshot retrieval tool

AssigneeBP Corporation North America Inc.

InventorPaul Edward Anderson

Life of this patent

Estimating the term…

Loading patent…

Abstract

A tool for removing a first flange from a second flange comprises a housing having a central axis, a first end, and an open second end opposite the first end. The housing also includes a first access port extending radially therethrough. In addition, the tool comprises an annular basket grapple coaxially disposed within the second end of the housing and configured to coaxially receive and engage a first flange. The basket grapple has a first end, a second end opposite the first end, and a cutout extending radially therethrough. The outer surface of the basket grapple includes external threads that engage mating internal threads on the inner surface of the housing. Further, the tool comprises a key releasably coupled to the housing. The key is configured to selectively prevent relative rotation between the basket grapple and the housing.

Claims22

Dependent claims

A tool for removing a first flange from a second flange, the tool comprising:

a housing having a central axis, a first end, an open second end opposite the first end, a radially inner surface, and a radially outer surface, wherein the housing includes a first access port extending radially from the outer surface to the inner surface;
an annular basket grapple coaxially disposed within the second end of the housing and configured to coaxially receive and engage a first flange, wherein the basket grapple has a first end, a second end opposite the first end, a radially inner surface, a radially outer surface, and a cutout extending radially through the basket grapple from the outer surface to the inner surface;
wherein the outer surface of the basket grapple includes external threads that engage mating internal threads on the inner surface of the housing;
and
a key releasably coupled to the housing, wherein the key has a first position extending radially through the first access port and the cutout, and a second position removed from the cutout, wherein the key is configured to prevent relative rotation between the basket grapple and the housing in the first position and allow relative rotation between the basket grapple and the housing in the second position.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 13/455,806Filed 25 Apr 2012
Priority: 25 Apr 2011
Published: 25 Oct 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

E21B 19/16
Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables: connecting or…
E21B 41/04
Equipment or details not covered by groups E21B15/00 - E21B40/00: manipulators for underwater operations, e.g. temporarily connected to well heads
E21B 43/0122
Specially adapted for obtaining from underwater installations: collecting oil or the like from a submerged leakage
E21B 33/038
Specially adapted for underwater installations: connectors used on well heads, e.g. for connecting blow-out preventer and riser