Support apparatus for a well bore tool
First Claim
Patent Images
1. An apparatus for supporting downhole operations, from a deck of a rigless structure comprising:
- a base having an opening for allowing access to a well bore in a subterranean formation;
a pair of spaced-apart vertical legs secured to and extending upwardly from the base, each of said legs comprising a movable portion adapted for vertical movement in relation to the base, top parts of each of said movable portions supporting an alignment assembly;
a swivel unit mounted between alignment assemblies above said opening, said swivel unit being configured for connecting to a rotating tool for delivery of rotating force to a downhole tool, wherein each alignment assembly comprises an elongated arm carrying alignment members having a plurality of radially-extending spokes on a proximate end thereof and carrying a handle on a distal end thereof, and a tightening member secured between the handle and the proximate end to facilitate movement of the alignment members into contact with the swivel unit upon demand for supporting the swivel unit in a substantial alignment over said opening and absorbing vibration from said swivel unit; and
a power source for providing power to said swivel unit and said movable portions of the legs.
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Accused Products
Abstract
A rigless support for a downhole operation, such as cutting of an underwater casing in preparation for plug-and-abandonment. The unit has a movable base that can be positioned on a floating structure, such as a barge or a marine vessel and delivered to the site. A pair of piston rams support a swivel unit therebetween, with the swivel unit being driven by a hydraulic motor and driving a casing cutter.
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Citations
21 Claims
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1. An apparatus for supporting downhole operations, from a deck of a rigless structure comprising:
- a base having an opening for allowing access to a well bore in a subterranean formation;
a pair of spaced-apart vertical legs secured to and extending upwardly from the base, each of said legs comprising a movable portion adapted for vertical movement in relation to the base, top parts of each of said movable portions supporting an alignment assembly;
a swivel unit mounted between alignment assemblies above said opening, said swivel unit being configured for connecting to a rotating tool for delivery of rotating force to a downhole tool, wherein each alignment assembly comprises an elongated arm carrying alignment members having a plurality of radially-extending spokes on a proximate end thereof and carrying a handle on a distal end thereof, and a tightening member secured between the handle and the proximate end to facilitate movement of the alignment members into contact with the swivel unit upon demand for supporting the swivel unit in a substantial alignment over said opening and absorbing vibration from said swivel unit; and
a power source for providing power to said swivel unit and said movable portions of the legs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
- a base having an opening for allowing access to a well bore in a subterranean formation;
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16. An apparatus for supporting a casing cutter from a deck of a rigless floating vessel, the apparatus comprising:
- a base having an opening for allowing access to a well bore in a subterranean formation;
a pair of spaced-apart vertical legs secured to and extending upwardly from the base, each of said legs comprising a movable portion adapted for vertical movement in relation to the base, top parts of each of said movable portions supporting an alignment assembly;
a swivel unit mounted between said alignment assemblies above said opening, said swivel unit being configured for connecting to a rotating tool for delivery of rotating force to the casing cutter, said swivel unit exerting downward force on said rotating tool for activating the casing cutter, wherein each alignment assembly comprises an elongated arm carrying an alignment member having a plurality of radially-extending spokes on a proximate end thereof and carrying a handle on a distal end thereof, and a tightening member secured between the handle and the proximate end of each arm to facilitate movement of the alignment members into contact with the swivel unit upon demand so as to support the swivel unit in a substantial alignment over said opening in the base and absorb vibration from said swivel unit; and
a power source for providing power to said swivel unit and said movable portions of the legs. - View Dependent Claims (17, 18, 19, 20, 21)
- a base having an opening for allowing access to a well bore in a subterranean formation;
Specification