Modular offshore drilling unit and method for construction of same
First Claim
1. A mobile offshore drilling unit including:
- at least one hull member have an opening of predetermined size for receiving a separately fabricated non-buoyant interchangeable rig block;
a separately fabricated non-buoyant interchangeable rig block sized to be received in said opening, said block including;
a draw works,a drilling floor, anda diesel/electric power system; and
means for connecting the hull member to the rig block.
1 Assignment
0 Petitions
Accused Products
Abstract
A mobile offshore drilling unit includes a hull member having an opening of predetermined size for receiving a separately fabricated, interchangeable, rig block, which further includes a draw works, a drilling floor, a diesel driver, an electric generator, a derrick, and at least one each of a mud pump, mud tank, a fuel tank, and a drilling water tank. The method of constructing such a unit includes constructing the hull member at a marine shipyard and fabricating the interchangeable rig block at a remote location. The rig block is constructed with the main deck having a drilling floor and mounting a draw works thereon; constructing a machinery deck with a diesel driver, an electric generator, and at least one mud pump; and constructing a tank deck with at least one each of a fuel tank and a water tank.
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Citations
19 Claims
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1. A mobile offshore drilling unit including:
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at least one hull member have an opening of predetermined size for receiving a separately fabricated non-buoyant interchangeable rig block; a separately fabricated non-buoyant interchangeable rig block sized to be received in said opening, said block including; a draw works, a drilling floor, and a diesel/electric power system; and means for connecting the hull member to the rig block. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A mobile offshore drilling unit including:
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at least one hull member have an opening of predetermined size for receiving a separately fabricated non-buoyant interchangeable rig block; and a separately fabricated non-buoyant interchangeable rig block sized to be received in said opening, said block including; a main deck including; the draw works, the drilling floor, and a plurality of pipe racks; a machinery deck including; the diesel/electric power system, at least one mud pump, and at least one mud tank; and a tank deck including; at least one fuel tank, and at least one drilling water tank. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A method of constructing a mobile offshore drilling unit including:
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constructing at a marine shipyard a hull member having an opening of predetermined size for receiving a separately fabricated a non-buoyant interchangeable rig block; separately assembling a non-buoyant interchangeable rig block sized to be received in said opening of the hull member, said step of assembling including; constructing a main deck having a drilling floor, and mounting a draw works thereon, and constructing a machinery deck and installing at least one diesel driver, an electric generator, and at least one mud pump thereon; and installing the non-buoyant interchangeable rig block in the opening of the hull member and fixably connecting the rig block to the hull member. - View Dependent Claims (18)
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19. A method of constructing a mobile offshore drilling unit including:
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removing a first non-buoyant interchangeable rig block received in an opening of a separately assembled hull member; replacing the first non-buoyant interchangeable rig block with a second non-buoyant interchangeable rig block including; a main deck having a drilling floor, and a draw works thereon, and a machinery deck having at least one diesel driver, an electric generator, and at least one mud pump thereon; and installing the second non-buoyant rig block in the opening of the hull member and fixably connecting the second non-buoyant rig block to the hull member.
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Specification