Subsea well completion system
First Claim
1. A subsea well completion system for multiple subsea wells, comprising:
- a fluid-tight work enclosure hull containing manifold means, the hull having a plurality of radially-disposed lateral penetration means extending therethrough, the penetration means being operatively connected to the manifold means; and
a base template lowered to the marine floor in a substantially horizontal position and having a lower support structure for supporting the work enclosure hull, the template further having an upper guidance structure comprising a plurality of substantially vertical guide members mounted in spaced radial array, each guide member extending inwardly toward the center of the template, forming an opening at the central portion of the template for receiving the work enclosure hull, a portion of the upper peripheral surface of each guide member sloping downwardly towad the opening for guiding the hull as it is lowered during installation of the hull onto the template.
2 Assignments
0 Petitions
Accused Products
Abstract
A subsea well completion system, and components of such a system, are disclosed for handling marine well fluids from multiple subsea wells. The system includes a fluid-tight work enclosure hull containing manifold means, the hull having a plurality of radially-disposed lateral penetration means extending therethrough, the penetration means being operatively connected to the manifold means; and a base template having means for securing the template to the marine floor in a substantially horizontal position and having a lower support structure for supporting the work enclosure hull, the template further having an upper guidance structure comprising a plurality of substantially vertical guide members mounted in spaced radial array, each guide member extending inwardly toward the center of the template, forming an opening at the central portion of the template for receiving the work enclosure hull, a portion of the upper peripheral surface of each guide member sloping downwardly toward the opening for guiding the hull as it is lowered during installation of the hull onto the template. A method of establishing production capability from multiple subsea wellheads on a base template secured to the marine floor is also disclosed employing the aforecited system components.
21 Citations
35 Claims
-
1. A subsea well completion system for multiple subsea wells, comprising:
-
a fluid-tight work enclosure hull containing manifold means, the hull having a plurality of radially-disposed lateral penetration means extending therethrough, the penetration means being operatively connected to the manifold means; and a base template lowered to the marine floor in a substantially horizontal position and having a lower support structure for supporting the work enclosure hull, the template further having an upper guidance structure comprising a plurality of substantially vertical guide members mounted in spaced radial array, each guide member extending inwardly toward the center of the template, forming an opening at the central portion of the template for receiving the work enclosure hull, a portion of the upper peripheral surface of each guide member sloping downwardly towad the opening for guiding the hull as it is lowered during installation of the hull onto the template. - View Dependent Claims (2, 3, 4, 12, 13, 14, 15, 19, 20)
-
-
5. A subsea well completion system for establishing production capability from multiple subsea wells, comprising:
-
a fluid-tight work enclosure hull containing manifold means, the hull having a plurality of radially-disposed lateral penetration means extending therethrough, the penetration means being operatively connected to the manifold means; and a base template lowered to the marine floor in a substantially horizontal position and having a lower support structure for supporting the work enclosure hull, the lower support structure of the template includes a plurality of substantially vertical well conductor pipes spaced around the template at a common radial distance from the center of the template for aligning the individual wells during drilling, the upper section of each conductor pipe terminating in a wellhead, the template further having an upper guidance structure comprising a plurality of substantially vertical guide members mounted in spaced radial array, each guide member extending inwardly toward the center of the template forming an opening at the central portion of the template for receiving the work enclosure hull, a portion of the upper peripheral surface of each guide member sloping downwardly toward the opening for guiding the hull as it is lowered during installation of the hull onto the template. - View Dependent Claims (6, 7, 8, 9, 10, 11, 16, 17, 18)
-
-
21. A subsea system for handling marine well fluids from multiple subsea wells, comprising:
-
a fluid-tight work enclosure hull having a plurality of radially-disposed lateral penetration means for releasable fluid connection through the hull; a base template having well bay forming means comprising a plurality of vertical dividers mounted in spaced radial array on the template and extending inwardly from the outer peripheral portion of the template toward the central portion of the template, the upper peripheral surface of each dividing means sloping downwardly toward the central portion of the template for guiding the work enclosure hull as it is lowered during installation onto the template; wellhead connector means installed in a well bay for releasably connecting a wellhead to a penetration means to establish fluid communication therebetween, the wellhead connector means comprising a fluid connection assembly and a rigid, open guide frame surrounding and rigidly secured to the fluid connection assembly, the width of the radially outermost portion of the guide frame, with respect to the central portion of the template, being adapted to prevent lateral and radial inward misorientation of the guide frame and the wellhead connector means as they are moved laterally into the well bay during installation thereof onto the template. - View Dependent Claims (22)
-
-
23. A subsea base template for guiding marine floor well drilling equipment at multiple wells and supporting a subsea work enclosure hull and wellheads, comprising:
-
a lower support structure comprising a substantially horizontally aligned, open tubular framework and a plurality of substantially vertical well conductor pipes spaced around the peripheral portion of the framework and integral therewith, for aligning the well drilling equipment, the upper section of each well conductor pipe terminating in a wellhead, the central portion of the framework being adapted to support the subsea work enclosure hull and the peripheral portion being adapted to support the wellheads; and an upper guidance structure comprising a plurality of guide members rigidly mounted on, and extending vertically from, the lower support structure in spaced radial array, each guide member extending inwardly toward the center of the template, forming a substantially cylindrical opening at the central portion of the framework for receiving the work enclosure hull, a portion of the upper surface of each guide member sloping downwardly toward the cylindrical opening for guiding the work enclosure hull as it is lowered during installation thereof onto the template, the guide members further providing structural protection for the work enclosure hull and the wellheads. - View Dependent Claims (24, 25, 26, 27, 28)
-
-
29. A subsea base template for guiding marine floor well drilling equipment at multiple wells and supporting a subsea work enclosure hull and wellheads, comprising:
-
a lower support structure comprising a substantially horizontally aligned, open tubular framework and a plurality of substantially vertical well conductor pipes spaced around the peripheral portion of the framework and integral therewith, for aligning the well drilling equipment, the upper section of each well conductor pipe terminating in a wellhead, the central portion of the framework being adapted to support the subsea work enclosure hull and the peripheral portion being adapted to support the wellheads; and an upper guidance structure comprising a plurality of guide members rigidly mounted on, and extending vertically from, the lower support structure in spaced radial array, each guide member extending inwardly toward the center of the template, forming a substantially cylindrical opening at the central portion of the framework for receiving the work enclosure hull, a portion of the upper surface of each guide member sloping downwardly toward the cylindrical opening for guiding the work enclosure hull as it is lowered during installation thereof onto the template, the guide members further providing structural protection for the work enclosure hull and the wellheads, the upper guidance structure further comprising blocking means rigidly mounted between each pair of adjacent guide members, except that said blocking means is not mounted between one pair of preselected adjacent guide members to permit receipt between said one pair of guide members of a work enclosure hull alignment means extending laterally from the periphery of the work enclosure hull as the hull is lowered during installation of the hull onto the template, thereby orienting the hull. - View Dependent Claims (30, 31)
-
-
32. A subsea base template for guiding marine floor well drilling equipment at multiple wells and supporting a subsea work enclosure hull, wellheads, and wellhead connector means, comprising:
-
a lower support structure comprising a substantially horizontally aligned, open tubular framework and a plurality of substantially vertical well conductor pipes spaced around the peripheral portion of the framework and integral therewith, for aligning the well drilling equipment, the upper section of each well conductor pipe terminating in a wellhead, the central portion of the framework being adapted to support the subsea work enclosure hull and the peripheral portion being adapted to support the wellheads and wellhead connector means; and an upper guidance structure comprising a plurality of guide members rigidly mounted on, and extending vertically from, the lower support structure in spaced radial array, each guide member extending inwardly toward the center of the template, forming a substantially cylindrical opening at the central portion of the framework for receiving the work enclosure hull, a portion of the upper surface of each guide member sloping downwardly toward the cylindrical opening for guiding the work enclosure hull as it is lowered during installation thereof onto the template, the vertical guide members being situated such that adjacent members define a radially inwardly tapered well bay for each wellhead for funneling the wellhead connector means into place during installation thereof onto the template; the guide members further providing structural protection for the work enclosure hull, the wellheads, and the wellhead connector means.
-
-
33. A method of establishing production capability from multiple subsea wellheads on a base template lowered to the marine floor, comprising:
-
providing a work enclosure hull containing a manifold, the hull having a substantially cylindrical portion with a plurality of radially-disposed lateral hull penetrators extending therethrough and operatively connected to the manifold; providing an upper guidance structure on the template comprising a plurality of substantially vertical guide members mounted in spaced radial array, each guide member extending inwardly from the outer periphery of the template, thereby providing a substantially cylindrical opening at the central portion of the template for receiving the work enclosure hull, a portion of the upper peripheral surface of each guide member sloping downwardly toward the cylindrical opening; lowering the work enclosure hull from a position directly above the template and funneling it through the upper guidance structure into the cylindrical opening at the central portion of the template, the work enclosure hull being guided into its resting position on the template by the guide members; and establishing subsea fluid communication between the subsea wellheads and the work enclosure hull. - View Dependent Claims (34, 35)
-
Specification