Cross-Reference to Related Applications
Background
[0002] Subsea templates are large subsea structures that support or otherwise house wellheads,
Christmas trees, and manifolds. A subsea manifold is made up of pipes and valves and
is designed to transfer hydrocarbons from wellheads into a pipeline. The manifold
is mounted onto the template, e.g., at the seafloor.
[0003] Generally, the subsea template includes a foundation that is at least partially embedded
within the seafloor. More particularly, the foundation may include several pilings,
which may be suction compartments (also referred to as suction anchors), e.g., positioned
at the corners of the structure. The suction compartments have an open lower end,
which is lowered, and then forced, into the seafloor, thereby anchoring the subsea
template manifold in place.
[0004] The remainder of the structure is built up from and supported by these suction compartments.
A variety of truss-structures, support beams, etc., are connected to the suction compartments
to provide the subsea template with sufficient stability and rigidity to allow for
safe and effective operation of the subsea devices associated therewith. This can
call for a large amount of material, which can be expensive in itself, and also can
be expensive and time-consuming to build onto the suction compartments.
Summary
[0005] Embodiments of the present disclosure may provide a subsea template manifold including
a first suction compartment configured to be at least partially embedded in a sea
floor, a second suction compartment configured to be at least partially embedded in
the sea floor, and a bridging element extending between and connected to the first
and second suction compartments. The bridging element is configured to be at least
partially embedded in the sea floor.
[0006] Embodiments of the disclosure may also provide a method for supporting a subsea manifold
at a sea floor including embedding at least a portion of a suction compartment of
a subsea template manifold into a seabed, and embedding at least a portion a bridging
element of the subsea template into the seabed. The bridging element extends between
and is connected to the first and second suction compartments.
[0007] Embodiments of the disclosure may provide an apparatus for supporting a subsea well
system, including a first suction anchor configured to be at least partially embedded
in a sea floor, a second suction anchor configured to be at least partially embedded
in the sea floor, and a bridging element extending between and connected to the first
and second suction anchors. The bridging element is configured to be at least partially
embedded in the sea floor.
[0008] This summary is provided to introduce a selection of concepts that are further described
below in the detailed description. This summary is not intended to identify key or
essential features of the claimed subject matter, nor is it intended to be used as
an aid in limiting the scope of the claimed subject matter.
Brief Description of the Drawings
[0009] The accompanying drawings, which are incorporated in and constitute a part of this
specification, illustrate embodiments of the present teachings and together with the
description, serve to explain the principles of the present teachings. In the figures:
Figure 1 illustrates a perspective view of a subsea template, according to an embodiment.
Figure 2 illustrates a perspective view of the template, according to another embodiment.
Figure 3 illustrates a perspective view of the template, according to yet another
embodiment.
Figure 4 illustrates a schematic plan view of four wellhead devices, which may be
configured to be landed on and/or otherwise connected to the four wells, respectively,
according to an embodiment.
Figure 5 illustrates a flowchart of a method for supporting a subsea manifold at a
sea floor, according to an embodiment.
Detailed Description
[0010] Reference will now be made in detail to specific embodiments illustrated in the accompanying
drawings and figures. In the following detailed description, numerous specific details
are set forth in order to provide a thorough understanding of the invention. However,
it will be apparent to one of ordinary skill in the art that embodiments may be practiced
without these specific details. In other instances, well-known methods, procedures,
components, circuits, and networks have not been described in detail so as not to
unnecessarily obscure aspects of the embodiments.
[0011] It will also be understood that, although the terms first, second, etc. may be used
herein to describe various elements, these elements should not be limited by these
terms. These terms are only used to distinguish one element from another. For example,
a first object could be termed a second object, and, similarly, a second object could
be termed a first object, without departing from the scope of the present disclosure.
[0012] The terminology used herein is for the purpose of describing particular embodiments
only and is not intended to be limiting. As used in the description and the appended
claims, the singular forms "a," "an" and "the" are intended to include the plural
forms as well, unless the context clearly indicates otherwise. It will also be understood
that the term "and/or" as used herein refers to and encompasses any and possible combinations
of one or more of the associated listed items. It will be further understood that
the terms "includes," "including," "comprises" and/or "comprising," when used in this
specification, specify the presence of stated features, integers, steps, operations,
elements, and/or components, but do not preclude the presence or addition of one or
more other features, integers, operations, elements, components, and/or groups thereof.
Further, as used herein, the term "if" may be construed to mean "when" or "upon" or
"in response to determining" or "in response to detecting," depending on the context.
[0013] Figure 1 illustrates a perspective view of a subsea template 100, according to an
embodiment. In some embodiments, the subsea template 100 may be configured to support
a manifold for transferring process fluids (e.g., hydrocarbons) from one or more wells
to a pipeline. The template 100 may include one or more suction compartments (four
shown: 102, 104, 106, 108). The suction compartments 102-108 may be cylindrical pilings,
which may be configured to be positioned at least partially below the surface of the
seafloor (i.e., "embedded" at least partially in the seafloor). The suction compartments
102-108 may be hollow cylinders, which may be open at the bottom. This may allow for
the suction compartments 102-108 to sink into the seafloor upon landing thereon during
installation. Suction may then be applied to the upper end of the suction compartments
102-108 so as to drive the suction compartments 102-108 farther into, e.g., entirely
into, the seafloor.
[0014] The template 100 may also include a top plate 110, which may extend laterally (e.g.,
in a generally horizontal, parallel to the seafloor direction) between the suction
compartments 102-108. Further, the top plate 110 may be coupled to the upper end of
the suction compartments 102-108, and thus may be configured to be positioned slightly
above or at the seafloor when the suction compartments 102-108 are installed in the
seafloor. In some embodiments, the top plate 110 may be provided by several segments,
one extending between each pair of adjacent suction compartments 102-108 as shown,
but in other embodiments, may be a single plate.
[0015] One or more bridging elements 112, 114, 116, 118 may extend between and be coupled
to the suction compartments 102-108. For example, respective ones of the bridging
elements 112-118 may extend between two of the suction compartments 102-108. In some
embodiments, the bridging elements 112-118 may be coupled to the top plate 110, but
in other embodiments, the bridging elements 112-118 and the top plate 110 may be separate.
[0016] The bridging elements 112-118 may be or include relatively thin, vertically-oriented
(i.e., with the thin side facing vertically) plates. In a specific embodiment, each
of the bridging elements 112-118 may include two such plates 120, 122, one nearer
to the center of the template 100 than the other, with the plates 120, 122 being offset
from and extending generally parallel to one another. Between the plates 120, 122
of at least one of the bridging elements (e.g., elements 112 and 116), one or more
wellheads 200, 202, 204, 206 may be positioned. Each wellhead 200-206 may include
connectors for connecting to wellhead equipment (e.g., Christmas trees, blowout preventers,
etc.), which may be or include one or more vertically-oriented posts. Within each
wellhead 200-206, a washout sleeve 214, 216, 218, 220 may be positioned, e.g., between
the two plates 120, 122. The washout sleeves 214-220 may be connected to the top plate
110 and/or one of the bridging elements 112-118. Further, the washout sleeves 214-220
may be connected to wells, and may represent the upper end of such wells (accordingly,
in some cases herein, reference numbers 214-220 may be described as pointing to wells).
Well-support brackets 250,252 may be connect to the bridging elements 112-118 and
the corresponding washout sleeves/wells 214-220.
[0017] Further, the bridging elements 112, 116 may include the well-support brackets 250,
252. The well-support brackets 250, 252 may couple to the wells 214-220 (e.g., washout
sleeves/wellheads 270 thereof). The well-support brackets 250, 252 may further couple
to one of the plates 120, 122 and/or to one of the suction containers 102-108.
[0018] The well-support brackets 250, 252 may be vertically-oriented plates, brackets, struts,
etc. In some embodiments, the well-support brackets 250, 252 may extend downwards,
and may be generally triangular, e.g., so as to facilitate extending and embedding
the brackets 250, 252 into the seafloor. In other embodiments, the well-support brackets
250 may extend between the plates 120, 122, as shown, and extend upwards therefrom,
such that the brackets 250, 252 may, in some cases, not be embedded in the seafloor
during installation. The well-support brackets 250, 252 may thus provide lateral support
and rigidity for the wells 214-220.
[0019] Figure 2 illustrates a perspective view of the template 100, according to another
embodiment. In this embodiment, the template 100 omits the fourth suction chamber
108, and thus provides a generally triangular footprint. It will be appreciated that
embodiments including five or more suction chambers 108, and any number of shapes
for the footprint, are contemplated herein. Further, in this embodiment, the bridging
elements 112-116 (bridging element 118 may be omitted) may be generally constructed
the same as one another, and may each include well-support brackets 250, 252, for
positioning a well therebetween (well not shown).
[0020] Figure 3 illustrates a perspective view of the template 100, according to yet another
embodiment. As shown, the plates 120, 122 of the bridging elements 112-118 may each
be connected to one of the wells 214-220. For example, the plates 120, 122 may each
provide one of the well-support brackets 250, 252, such that the plates 120, 122 (and
thus the bridging elements 112-118) are connected to the suction compartments 102-108
via the connection with the wells 214-220.
[0021] With the wells 214-220 positioned (e.g., one each) between the suction compartments
102-108, the wellhead equipment may be similarly clocked at 90 degree angles. For
example, Figure 4 illustrates a schematic plan view of four wellhead devices 400,
402,404, 406, which may be configured to be landed on and/or otherwise connected to
the four wells 214-220, respectively, according to an embodiment. In some embodiments,
the four wellhead devices 400-406 may each be a Christmas tree. Accordingly, the four
wellhead devices 400-406 may each include a remote operated vehicle (ROV) panel 408,410,
412, 414. So as to allow for each of the ROV panels 408-414 to face outwards, each
of the wellhead devices 400-406 may be rotated 90 degrees from the adjacent wellhead
device 400-406. In some situations, this may allow for a more compact template 100.
[0022] With continuing reference to Figures 1-4, Figure 5 illustrates a flowchart of a method
500 for supporting a subsea manifold, using a subsea template such as the template
100, at a sea floor, according to an embodiment. The method 500 may include embedding
at least a portion of a first suction compartment 102-108 and a second suction compartment
102-108 of a subsea template manifold 100 into a seabed, as at 502. The method 500
may further include embedding at least a portion a bridging element 112-118 of the
subsea template 100 into the seabed, as at 504. The bridging element 112-118 extends
between and is connected to the first and second suction 102-108 compartments.
[0023] In some embodiments, embedding the at least a portion of the first and second suction
compartments 102-108 at 502 and embedding at least a portion of the bridging element
112-118 at 504 occur at least partially at the same time (i.e., simultaneously or
overlapping in time).
[0024] In some embodiments, the bridging element 112-118 includes one or more vertically-oriented
plates extending laterally between the first and second suction compartments 102-108
and being fixed thereto. In such embodiments, embedding the at least a portion of
the bridging element 112-118 at 504 may include embedding at least a portion of the
plates 120, 122 into the seabed.
[0025] In some embodiments, the method 500 may include positioning, at 506, a first Christmas
tree 700, a second Christmas tree 702, a third Christmas tree 704, and a fourth Christmas
tree 706, on the subsea template 100 and in communication with the wells 214-220.
Each of the first, second, third, and fourth Christmas trees 700-706 faces in a different
direction. For example, each of the Christmas trees 700-706 may be rotated 90 degrees
in orientation from the adjacent Christmas trees 700-706.
[0026] As used herein, the terms "inner" and "outer"; "up" and "down"; "upper" and "lower";
"upward" and "downward"; "above" and "below"; "inward" and "outward"; and other like
terms as used herein refer to relative positions to one another and are not intended
to denote a particular direction or spatial orientation. The terms "couple," "coupled,"
"connect," "connection," "connected," "in connection with," and "connecting" refer
to "in direct connection with" or "in connection with via one or more intermediate
elements or members."
[0027] The foregoing description, for purpose of explanation, has been described with reference
to specific embodiments. However, the illustrative discussions above are not intended
to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications
and variations are possible in view of the above teachings. Moreover, the order in
which the elements of the methods described herein are illustrate and described may
be re-arranged, and/or two or more elements may occur simultaneously. The embodiments
were chosen and described in order to best explain the principals of the invention
and its practical applications, to thereby enable others skilled in the art to best
utilize the invention and various embodiments with various modifications as are suited
to the particular use contemplated.
1. A subsea template manifold, comprising:
a first suction compartment configured to be at least partially embedded in a sea
floor;
a second suction compartment configured to be at least partially embedded in the sea
floor; and
a bridging element extending between and connected to the first and second suction
compartments, wherein the bridging element is configured to be at least partially
embedded in the sea floor.
2. The subsea template manifold of claim 1, wherein the bridging element comprises one
or more vertically-oriented plates extending laterally between the first and second
suction compartments and being fixed thereto.
3. The subsea template manifold of claim 1, wherein the bridging element comprises a
first plate and a second plate, the first and second plates each being coupled to
the first and second suction compartments and extending generally parallel to one
another, the subsea template manifold being configured to connect to a well between
the first and second plates.
4. The subsea template manifold of claim 1, wherein the bridging element comprises a
first section and a second section, the first section being connected to the first
suction compartment, and the second section being connected to the second suction
compartment, the subsea template manifold further comprising a washout sleeve connected
to the first and second sections, such that the first and second sections are connected
to one another via the washout sleeve.
5. The subsea template manifold of claim 1, further comprising a well-support bracket
and a washout sleeve positioned between the first and second suction compartments
and coupled to the bridging element, wherein the well-support bracket is coupled to
the washout sleeve, and the first suction compartment, the bridging element, or both,
and wherein the well-support bracket is configured to be at least partially embedded
below the sea floor.
6. The subsea template manifold of claim 1, further comprising a top plate coupled to
the first suction compartment, the second suction compartment, and the support bracket,
wherein the top plate is configured to be above or on the sea floor and to support
one more seafloor devices.
7. The subsea template manifold of claim 1, wherein the bridging element comprises a
first bridging element, the subsea template manifold further comprising:
a third suction compartment configured to be at least partially embedded beneath the
sea floor;
a fourth suction compartment configured to be at least partially embedded beneath
the sea floor;
a second bridging element extending between and connected to the second and third
suction compartments;
a third bridging element extending between and connected to the third and fourth suction
compartments;
a fourth bridging element extending between and connected to the first and fourth
suction compartments;
a plurality of washout sleeves, wherein a respective one of the plurality of washout
sleeves connected to each of the first, second, third, and fourth bridging elements.
8. The subsea template manifold of claim 7, further comprising a first Christmas tree,
a second Christmas tree, a third Christmas tree, and a fourth Christmas tree, each
facing in a different direction and each being coupled to one of the plurality of
washout sleeves.
9. A method for supporting a subsea manifold at a sea floor, comprising:
embedding at least a portion of a suction compartment of a subsea template manifold
into a seabed; and
embedding at least a portion a bridging element of the subsea template into the seabed,
wherein the bridging element extends between and is connected to the first and second
suction compartments.
10. The method of claim 9, wherein embedding the at least a portion of the suction compartment
and the embedding at least a portion of the bridging element occur at least partially
at the same time.
11. The method of claim 9, wherein the bridging element comprises one or more vertically-oriented
plates extending laterally between the first and second suction compartments and being
fixed thereto, wherein embedding the at least a portion of the bridging element comprises
embedding at least a portion of the plates into the seabed.
12. The method of claim 9, further comprising positioning a first Christmas tree, a second
Christmas tree, a third Christmas tree, and a fourth Christmas tree, on the subsea
template and in communication with the wells, wherein each of the first, second, third,
and fourth Christmas trees faces in a different direction.
13. The method of claim 12, wherein the first, second, third, and fourth Christmas trees
face in four different directions, 90 degrees offset from one another.
15. An apparatus for supporting a subsea well system, comprising:
a first suction anchor configured to be at least partially embedded in a sea floor;
a second suction anchor configured to be at least partially embedded in the sea floor;
and
a bridging element extending between and connected to the first and second suction
anchors, wherein the bridging element is configured to be at least partially embedded
in the sea floor.
16. The apparatus of claim 15, wherein the bridging element comprises one or more vertically-oriented
plates extending laterally between the first and second suction anchors and being
fixed thereto.
17. The apparatus of claim 15, wherein the bridging element comprises a first plate and
a second plate, the first and second plates each being coupled to the first and second
suction anchors and extending generally parallel to one another, the subsea template
manifold being configured to connect to a well between the first and second plates.
18. The apparatus of claim 15, further comprising a top plate coupled to the first suction
anchor, the second suction anchor, and the support bracket, wherein the top plate
is configured to be above or on the sea floor and to support one more subsea devices.
19. The apparatus of claim 15, wherein the bridging element comprises a first bridging
element, the subsea template manifold further comprising:
a third suction anchor configured to be at least partially embedded beneath the sea
floor;
a fourth suction anchor configured to be at least partially embedded beneath the sea
floor;
a second bridging element extending between and connected to the second and third
suction anchors;
a third bridging element extending between and connected to the third and fourth suction
anchors;
a fourth bridging element extending between and connected to the first and fourth
suction anchors;
a plurality of wellheads, wherein a respective one of the plurality of wellheads is
connected to each of the first, second, third, and fourth bridging elements.
20. The apparatus of claim 19, further comprising a first Christmas tree, a second Christmas
tree, a third Christmas tree, and a fourth Christmas tree, each facing in a different
direction and each being coupled to one of the plurality of wellheads.