Method and a drilling rig for drilling a bore well
First Claim
1. A method of handling tubular body sections at a drilling site by means of drilling equipment, which equipment comprisesa drill floor or platform with a derrick extending upwards therefrom,a first hoist connected to the upper part of the derrick for passing a tubular body which includes a plurality of releasably interconnected tubular body sections through a drilling opening defined in the drill floor,storage means for storing a plurality of tubular lengths, each of which includes at least two releasably interconnected tubular body sections, being arranged on the drill floor,first transporting means for transporting tubular lengths between the storage means and said first hoist,a second hoist connected to the upper part of the derrick above a preparation opening defined by opening defining means and extending through the drill floor at a location spaced from the drilling opening and from the storage means,and second transporting means for transporting tubular lengths between the storage means and said second hoist,said method comprising:
- transporting tubular lengths from the storage means to the drilling opening in a substantially vertical position by means of said first transporting means,releasably connecting said tubular lengths to the upper end of the tubular body and successively lowering the tubular body through the drilling opening by means of said first hoist,transporting tubular body sections to the preparation opening by third transporting means,forming a tubular length by releasably interconnecting said body sections while one of them extends through the preparation opening and another is suspended by means of said second hoist withdrawing the prepared length from the preparation opening by means of said second hoist, andtransporting the prepared length to the storage means in a substantially vertical position by means of said second transporting means.
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0 Petitions
Accused Products
Abstract
Drilling equipment, especially for offshore use, comprises a drill floor or platform (11) with a derrick (10) extending upwards therefrom. A first hoist (12) connected to the upper part of the derrick is used for passing a length of a tubular body (19), such as a drill string or a well casing, through a drilling opening (18) defined in and extending through the drill floor. The tubular length is connected to or disconnected from the drill string or well casing during the drilling operation, and such tubular lengths are strored in a storage area (31, 32) of the drill floor. The tubular lengths may be transported from the storage area to the first hoist (12) and vice versa by means of first transporting means (22). The drill floor or platform (11) also defines a preparation opening (21) extending therethrough at a location spaced from the drilling opening and from the storage area, and a second hoist or a preparation hoist (20) is connected to the upper part of the derrick above the preparation opening. Two or more tubular sections may then be assembled to tubular lengths at the preparation opening by means of the preparation hoist while the drilling operation is going on at the drilling opening, and the prepared lengths may be transported to and stored in the storage area ready for use at the drilling opening. Similarly, tubular lengths may be disassembled into tubular sections at the preparation opening before they are to be transported from the drilling site. The possibility of assembling and disassembling tubular lengths form tubular sections at the preparation opening while the drilling operation is going on at the drilling opening substantially reduces the necessary idle time in drilling operations.
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Citations
26 Claims
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1. A method of handling tubular body sections at a drilling site by means of drilling equipment, which equipment comprises
a drill floor or platform with a derrick extending upwards therefrom, a first hoist connected to the upper part of the derrick for passing a tubular body which includes a plurality of releasably interconnected tubular body sections through a drilling opening defined in the drill floor, storage means for storing a plurality of tubular lengths, each of which includes at least two releasably interconnected tubular body sections, being arranged on the drill floor, first transporting means for transporting tubular lengths between the storage means and said first hoist, a second hoist connected to the upper part of the derrick above a preparation opening defined by opening defining means and extending through the drill floor at a location spaced from the drilling opening and from the storage means, and second transporting means for transporting tubular lengths between the storage means and said second hoist, said method comprising: -
transporting tubular lengths from the storage means to the drilling opening in a substantially vertical position by means of said first transporting means, releasably connecting said tubular lengths to the upper end of the tubular body and successively lowering the tubular body through the drilling opening by means of said first hoist, transporting tubular body sections to the preparation opening by third transporting means, forming a tubular length by releasably interconnecting said body sections while one of them extends through the preparation opening and another is suspended by means of said second hoist withdrawing the prepared length from the preparation opening by means of said second hoist, and transporting the prepared length to the storage means in a substantially vertical position by means of said second transporting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 23)
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14. A drilling rig comprising
a drill floor or platform, a derrick extending upwards from the drill floor, a first hoist connected to the upper part of the derrick for passing a tubular body through a drilling opening defined in the drill floor, storage means for storing a plurality of tubular body lengths, each including at least two releasably interconnected tubular body sections, arranged on the drill floor, first transporting means for transporting tubular body lengths between the storage means and said first hoist, a second hoist connected to the upper part of the derrick above a preparation opening defined by opening defining means and extending through the drill floor at a location spaced from the drilling opening and from the storage means, second transporting means for transporting tubular body lengths from said hoist to the storage means, and means for interconnecting and disconnecting tubular body sections at the drilling and preparation openings, whereby tubular body sections may be assembled at the preparation opening into tubular body lengths, which are to be connected to the tubular body at the drilling opening.
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25. A drilling rig comprising
a drill floor or platform, a derrick extending upwards form the drill floor, a first hoist connected to the upper part of the derrick for passing a tubular body through a drilling opening defined in the drill floor, storage means for storing a plurality of tubular body lengths, each including at least two releasably interconnected tubular body sections, arranged on the drill floor, first transporting means for transporting tubular body lengths between the storage means and said first hoist, a second hoist connected to the upper part of the derrick above a preparation opening defined by opening defining means and extending through the drill floor at a location spaced from the drilling opening and from the storage means, second transporting means for transporting tubular body lengths from said hoist to the storage means, and means for interconnecting and disconnecting tubular body sections at the drilling and preparation openings, whereby tubular body sections may be assembled at the preparation opening into tubular body lengths, which are to be connected to the tubular body at the drilling opening, means for laterally displacing said opening defining means in relation to the drill floor between a first position in which the preparation opening is located substantially vertically below the second hoist, and a second position in which the axis of the preparation opening is laterally offset from the vertical suspension line of said second hoist, and a third hoist positioned so that a tubular body section suspended thereby may be moved into and out of the preparation opening in said second position thereof.
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26. A drilling rig comprising:
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a drill floor or platform, a derrick extending upwards from the drill floor, a first hoist connected to the upper part of the derrick for passing a tubular body through a drilling opening defined in the drill floor, storage means for storing a plurality of tubular body lengths, each including at least two releasably interconnected tubular body sections arranged on the drill floor, first transporting means for transporting tubular body lengths between the storage means and said first hoist, and a second hoist connected to the upper part of the derrick above a preparation opening defined by opening defining means and extending through the drill floor at a location spaced from the drilling opening and from the storage means, second transporting means for transporting tubular body lengths from said hoist to the storage means, and means for interconnecting and disconnecting tubular body sections at the drilling and preparation openings, whereby tubular body sections may be assembled at the preparation opening into tubular body lengths, which are to be connected to the tubular body at the drilling opening, and third transporting means for transporting tubular body sections to the preparation opening.
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Specification