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US 10,138,098 B2Granted
Draw-works and method for operating the same
AssigneeNational Oilwell Varco Norway AS
InventorsRune Sørensen, Timothy Watson, Ivan Rajic
Life of this patent
Estimating the term…
Abstract
Disclosed is a draw-works and a method of operation. The draw-works includes a first drum configured to store and reel in an elongated hoisting member, such as a hoisting cable, a second drum configured to store and reel in the elongated hoisting member, and a rotation device configured to rotate the first and second drums, wherein at least one of the drums is selectively connectable to and disconnectable from the rotation device.
Claims20
A draw-works comprising:
- an elongated hoisting member having a first end and a second end,
- a first drum for storing and reeling an elongated hoisting member;
- a second drum for storing and reeling said elongated hoisting member;
- and
- a rotation assembly for rotating said first drum and said second drum;
- wherein at least one of said first drum and said second drum is selectively connectable to and disconnectable from said rotation assembly;
- and
- wherein the first end of said elongated hoisting members is connected to said first drum, and the second end of said elongated hoisting member is connected to said second drum.
5 more elements
A draw-works comprising:
- a first drum for storing and reeling an elongated hoisting member;
- a second drum for storing and reeling said elongated hoisting member;
- and
- a rotation assembly for rotating said first drum and said second drum;
- wherein at least one of said first drum and said second drum is selectively connected to and disconnectable from said rotation assembly;
- wherein the at least one of said first drum and said second drum is selectively connectable to and disconnectable from said rotation assembly by means of first remotely operateable connection;
- wherein said rotation assembly comprises a first rotation assembly for rotating said first drum and a second rotation assembly for rotating said second drum, said first and second rotation assembly being selectively, mechanically connectable to and disconnectable from each other.
4 more elements
A draw-works comprising:
- a hoisting cable having first and second ends;
- a first drum configured to store said first end of said hoisting cable and to reel in said hoisting cable when said first drum is rotated;
- a second drum configured to store said second end of said hoisting cable and to reel in said hoisting cable when said second drum is rotated;
- a first rotation assembly configured to rotate said first drum and comprising one or more motors coupled to a first rotatable shaft;
- a second rotation assembly configured to rotate said second drum and comprising one or more motors coupled to a second rotatable shaft;
- wherein at least said first drum is selectively connectable to and disconnectable from said first rotatable shaft.
3 more elements
A method for operating a draw-works wherein the draw-works comprises:
- a first drum configured to store and reel in an elongated hoisting member;
- a second drum configured to store and reel in said elongated hoisting member;
- and
- a rotation assembly configured to rotate said first drum and said second drum;
- wherein at least one of said first drum and said second drum is selectively connectable to and disconnectable from said rotation assembly;
- wherein said rotation assembly comprises a first rotation assembly for rotating said first drum and second rotation assembly for rotating said second drum, said first and second rotation assembly being selectively, mechanically connectable to and disconnectable from each other;
- wherein the method comprises:
- connecting both said first drum and said second drum to said rotation assembly so as to rotate the two drums synchronously.
5 more elements
A method for operating a draw-works wherein the draw-works comprises:
- a first drum configured to store and reel in an elongated hoisting member;
- a second drum configured to store and reel in said elongated hoisting member;
- and
- a rotation assembly configured to rotate said first drum and said second drum;
- wherein at least on of said drum and second said drum is selectively connectable to and disconnectable from said rotation assembly;
- wherein the method comprises;
- connecting both said and first drum and second drum to said rotation assembly so as to rotate the two drums synchronously;
- and
- disconnecting a first rotation assembly that is configured to rotate said first drum from a second rotation assembly that is configured to rotate said second drum so as to operate said first and second drums independently.
6 more elements
Dependencies are inferred from the claim text.