US20080128139A1 - Utility skid tree support system for subsea wellhead - Google Patents
Utility skid tree support system for subsea wellhead Download PDFInfo
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- US20080128139A1 US20080128139A1 US11/942,230 US94223007A US2008128139A1 US 20080128139 A1 US20080128139 A1 US 20080128139A1 US 94223007 A US94223007 A US 94223007A US 2008128139 A1 US2008128139 A1 US 2008128139A1
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 60
- 230000000295 complement effect Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 6
- 239000004020 conductor Substances 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 239000012530 fluid Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 231100001261 hazardous Toxicity 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/02—Surface sealing or packing
- E21B33/03—Well heads; Setting-up thereof
- E21B33/035—Well heads; Setting-up thereof specially adapted for underwater installations
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/12—Methods or apparatus for controlling the flow of the obtained fluid to or in wells
- E21B43/121—Lifting well fluids
Definitions
- the present invention relates in general to subsea wellheads and, in particular, to an improved system, method, and apparatus for a utility skid tree support system for subsea wellheads.
- a subsea production tree is installed at the sea floor.
- the tree may be connected by a flowline jumper to a subsea manifold, which may be connected to other subsea trees in the vicinity.
- a production riser may extend from the subsea manifold or from an individual tree to a processing facility, normally a floating platform.
- the well formation pressure is normally sufficient to cause the well fluid to flow up the well to the tree, and from the tree to the processing facility.
- the well may have sufficient pressure to cause the well fluid to flow to the tree but not enough to flow from the sea floor to the processing facility. In other cases, the well may even lack sufficient pressure to flow well fluid to the sea floor.
- Downhole electrical submersible pumps have been used for many years in surface wells, but because of periodic required maintenance, are not normally employed downhole in a subsea well.
- Embodiments of a system, method, and apparatus for a utility skid tree support system for subsea wellheads are disclosed.
- the invention enables a tree to be mounted by and precisely interface with utility skids.
- Production bore access is provided through an extended production wing block.
- the system reacts and transfers installation loads and potential snag loads to the conductor.
- the tree accepts skids for flow boosting, metering, water-oil separation, etc.
- a conventional choke may be fitted outboard (i.e., downstream) from the utility insert profile.
- FIG. 1 is a sectional side view of one embodiment of utility skid tree system constructed in accordance with the invention
- FIG. 2 is an isometric view of a subassembly of the system of FIG. 1 and is constructed in accordance with the invention.
- FIG. 3 is an isometric view of another subassembly of the system of FIG. 1 and is constructed in accordance with the invention.
- a wellhead housing 11 is located at the upper end of a subsea well.
- Wellhead housing 11 is a large tubular member mounted to a conductor pipe that extends to a first depth in the well.
- a subsea Christmas or production tree 13 such as a horizontal or spool tree, is secured to the upper end of wellhead housing 11 by a conventional connector.
- Tree 13 has a bore 15 that contains a tubing hanger 17 .
- Tubing hanger 17 supports a string of tubing 19 that extends into the well for the flow of production fluid.
- Tubing 19 registers with a production passage 21 that extends through tubing hanger 17 .
- a lateral production port 23 extends from production passage 21 through a production master valve 25 within tree 13 .
- Production passage 21 of tubing hanger 17 has a crown plug profile 31 located above lateral production port 23 .
- Profile 31 is adapted to receive a plug normally lowered and retrieved by a wireline.
- Tree 13 has a mandrel 33 on its upper end containing an external grooved profile.
- An adapter 35 lands on tree 13 .
- Adapter 35 has a conventional, hydraulically-actuated connector 37 for connecting to tree mandrel 33 .
- Adapter 35 has a seal sub 39 that extends downward into sealing engagement with production passage 21 in tubing hanger 17 .
- Adapter 35 has a production passage 41 that registers with seal sub 39 for the flow of production fluid.
- An isolation valve 43 and a retrievable plug 45 are located within production bore 41 .
- a swab valve may be used in lieu of plug 45 .
- a lateral production port 47 extends from production bore 41 between valve 43 and plug 45 .
- Adapter 35 preferably has a mandrel 49 on its upper end that receives a debris cap 51 .
- Lateral production port 47 connects to an intake conduit 53 .
- a flow interface device 55 such as a subsea pressure intensifier or oil separator, is connected to intake conduit 53 , which is preferably shorter than it appears in the drawings.
- system 61 comprises a wing block 63 having an extended length, a horizontal bore 65 and a vertical bore 71 extending upward therefrom to device 55 .
- the wing block 63 may be mounted to tree 13 as shown on a lip 66 , or integrally formed with tree 13 (not shown).
- Horizontal bore 65 has a production wing valve 67 that is mounted adjacent to and in fluid communication with production master valve 25 and lateral production port 23 .
- Horizontal bore 65 may be interconnected to a choke body 69 , which also may comprise a T-conduit or still other equipment.
- production wing valve 67 may be located horizontally closer to production master valve 25 than to an end face 70 of wing block 63 .
- vertical bore 71 is located horizontally closer to end face 70 than production master valve 25 .
- horizontal bore 65 is located closer to left side face 72 ( FIGS. 2 and 3 ) of wing block 63 than right side face 74 thereof.
- a block leg 73 extends downward from wing block 63 directly beneath wing valve 67 .
- Block leg 73 extends across the entire width W of wing block 63 , and has a horizontal lower surface 75 and a chamfer 77 as shown.
- a wide groove 79 is formed on a top surface 81 of wing block 63 .
- groove 79 may extend from end face 70 to tree 13 as shown.
- groove 79 may be offset from end face 70 ( FIG. 3 ) and intersect an orthogonal shelf 83 formed below and parallel to top surface 81 .
- groove 79 is located directly above horizontal bore 65 , such that it too is closer to left side face 72 than right side face 74 . This configuration segments the top surface 81 into a smaller portion (see left side of FIG. 2 ) and a larger portion (right side of FIG. 2 ).
- a complementary vertical groove 85 is formed on the side of tree 13 and aligns with groove 79 .
- the support system 61 further comprises a utility skid 101 having an elongated body with a rectangular foot 103 extending downward therefrom. Foot 103 is closely received by groove 79 ( FIG. 3 ) and groove 85 ( FIG. 2 ) in tree 13 for mating engagement therewith.
- a flat ring 105 protrudes horizontally from a tree side end of skid 101 .
- Ring 105 has an opening 107 for receiving mandrel 33 as shown, which helps to locate and align skid 101 with respect to the tree 13 and support system 61 .
- Skid 101 may be provided with an optional tab 109 that extends vertically downward from an opposite end thereof with respect to ring 107 . Tab 109 engages vertical bore 71 in wing block 63 to complete a mating alignment between skid 101 and wing block 63 .
- a choke insert (not shown) may be located in choke body 69 .
- An internal tree cap (not shown) would be located at the upper end of tree 13 for sealing bore 15 .
- a plug (not shown) would be located in profile 31 . The fluid would flow out through valves 25 and 67 , through the choke in choke body 69 , and into a production flow line.
- the operator would then connect a riser (not shown) to tree mandrel 33 .
- the operator closes valves 25 , 67 , which along with production port 23 , make up a main flow path.
- the operator removes the internal tree cap through the riser while leaving the crown plug within crown profile 31 .
- With the assistance of an ROV the operator removes the choke insert from choke body 69 .
- the operator then removes the riser and lowers adapter 35 , device 55 and its conduit 53 as a unit. Seal sub 39 stabs sealingly into tubing hanger bore 21 .
- Connector 37 connects adapter 35 in place, and device 55 is connected to wing block 63 . A downward force due to the weight of device 55 passes through adapter 35 and tree 13 into wellhead housing 11 .
- the operator removes plug 45 from its position above lateral production port 47 .
- the operator opens valve 43 and removes the crown plug from profile 31 and reinstalls plug 45 above production port 47 .
- the crown plug could be re-located from profile 31 to the position above production lateral port 47 , thus serving as plug 45 .
- the riser is removed and debris cap 51 is installed on adapter 35 .
- Opening valve 97 and supplying power to pressure intensifier 109 causes well fluid to be flow from production bore 76 through passage 96 , port 101 , and conduit 107 to pressure intensifier 109 .
- Pressure intensifier 109 pumps the fluid out conduit 111 through choke body 83 into the flow line.
- Adapter passage 96 , conduits 107 , 111 and pressure intensifier 109 thus create a bypass flow path.
- Device 55 also may operate in combination with a downhole electrical submersible pump suspended on tubing. If the assembly is to be used as an injection well, device 55 would operate in the reverse direction and fluid would flow from choke body 69 to device 55 , which pumps fluid down production passage 21 . If device 55 is to be utilized from the beginning, it could be lowered and installed initially along with tree 13 . In that instance, a T-conduit would typically be used for choke body 69 . For removing device 55 to repair or replace it, the operator attaches a riser, removes plug 45 and lowers a crown plug into crown plug profile 31 .
- plug 45 may be released, lowered and reset in crown plug profile 31 .
- the operator disengages connector device 55 and connector 37 and retrieves the assembly to the surface.
- the operator then lowers the assembly with a new or repaired device 55 and repeats the process.
- the operator has the ability of lowering tools or instruments on wireline or coiled tubing into tubing 19 by removing debris cap 51 and connecting a riser to mandrel 49 .
- Plug 45 is then removed through the riser, providing access for wireline tools.
- the invention has significant advantages. Supporting utility skids with a wing block for the tree utilizes the extensive strength of the tree mandrel to avoid the need for specially constructed supporting frames. Equipment such as pump assemblies can be readily installed and retrieved for maintenance. The assembly allows access to the tree tubing and tubing annulus for workover operations. The system reacts and transfers installation loads and potential snag loads to the conductor. The tree accepts skids for flow boosting, metering, water-oil separation, etc.
Abstract
A utility skid tree system for subsea wellheads enables a tree to be mounted by and interface with utility skids. Production bore access is provided through an extended production wing block. The system reacts and transfers installation loads and potential snag loads to the conductor. The tree accepts skids for flow boosting, metering, water-oil separation, etc. A conventional choke may be fitted outboard of the utility insert profile.
Description
- This patent application is a continuation-in-part (CIP) of U.S. patent application Ser. No. 11/595,444, filed Nov. 9, 2006, having Attorney Docket No. V2003047A, and entitled Tree Mounted Well Flow Interface Device.
- 1. Technical Field
- The present invention relates in general to subsea wellheads and, in particular, to an improved system, method, and apparatus for a utility skid tree support system for subsea wellheads.
- 2. Description of the Related Art
- In one type of offshore well production, a subsea production tree is installed at the sea floor. The tree may be connected by a flowline jumper to a subsea manifold, which may be connected to other subsea trees in the vicinity. A production riser may extend from the subsea manifold or from an individual tree to a processing facility, normally a floating platform. The well formation pressure is normally sufficient to cause the well fluid to flow up the well to the tree, and from the tree to the processing facility.
- In very deep water, the well may have sufficient pressure to cause the well fluid to flow to the tree but not enough to flow from the sea floor to the processing facility. In other cases, the well may even lack sufficient pressure to flow well fluid to the sea floor. Downhole electrical submersible pumps have been used for many years in surface wells, but because of periodic required maintenance, are not normally employed downhole in a subsea well.
- A variety of proposals have been made for booster pumps to be installed at the sea floor to boost the well fluid pressure. However, because of the pump size, installation expense and technical difficulties, such installations are rare. When such configurations are used, large utility skids are typically used to move equipment to and from the subsea well from the surface. Utility skids are cumbersome and manipulating them with respect to the well can be very difficult if not hazardous to operators and the well installation itself. Thus, an improved system and method of facilitating interaction between subsea wells and utility skids would be desirable.
- Embodiments of a system, method, and apparatus for a utility skid tree support system for subsea wellheads are disclosed. The invention enables a tree to be mounted by and precisely interface with utility skids. Production bore access is provided through an extended production wing block. The system reacts and transfers installation loads and potential snag loads to the conductor. The tree accepts skids for flow boosting, metering, water-oil separation, etc. A conventional choke may be fitted outboard (i.e., downstream) from the utility insert profile.
- The foregoing and other objects and advantages of the present invention will be apparent to those skilled in the art, in view of the following detailed description of the present invention, taken in conjunction with the appended claims and the accompanying drawings.
- So that the manner in which the features and advantages of the present invention, which will become apparent, are attained and can be understood in more detail, more particular description of the invention briefly summarized above may be had by reference to the embodiments thereof that are illustrated in the appended drawings which form a part of this specification. It is to be noted, however, that the drawings illustrate only some embodiments of the invention and therefore are not to be considered limiting of its scope as the invention may admit to other equally effective embodiments.
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FIG. 1 is a sectional side view of one embodiment of utility skid tree system constructed in accordance with the invention; -
FIG. 2 is an isometric view of a subassembly of the system ofFIG. 1 and is constructed in accordance with the invention; and -
FIG. 3 is an isometric view of another subassembly of the system ofFIG. 1 and is constructed in accordance with the invention. - Referring to
FIGS. 1-3 , embodiments of a system, method and apparatus for a utility skid tree support system for subsea wellheads are shown. Awellhead housing 11 is located at the upper end of a subsea well. Wellheadhousing 11 is a large tubular member mounted to a conductor pipe that extends to a first depth in the well. - A subsea Christmas or
production tree 13, such as a horizontal or spool tree, is secured to the upper end ofwellhead housing 11 by a conventional connector.Tree 13 has abore 15 that contains atubing hanger 17.Tubing hanger 17 supports a string oftubing 19 that extends into the well for the flow of production fluid. Tubing 19 registers with aproduction passage 21 that extends throughtubing hanger 17. Alateral production port 23 extends fromproduction passage 21 through aproduction master valve 25 withintree 13. -
Production passage 21 oftubing hanger 17 has acrown plug profile 31 located abovelateral production port 23.Profile 31 is adapted to receive a plug normally lowered and retrieved by a wireline.Tree 13 has amandrel 33 on its upper end containing an external grooved profile. Anadapter 35 lands ontree 13.Adapter 35 has a conventional, hydraulically-actuatedconnector 37 for connecting totree mandrel 33.Adapter 35 has aseal sub 39 that extends downward into sealing engagement withproduction passage 21 intubing hanger 17.Adapter 35 has aproduction passage 41 that registers withseal sub 39 for the flow of production fluid. Anisolation valve 43 and aretrievable plug 45 are located withinproduction bore 41. A swab valve may be used in lieu ofplug 45. - A
lateral production port 47 extends from production bore 41 betweenvalve 43 andplug 45.Adapter 35 preferably has amandrel 49 on its upper end that receives adebris cap 51.Lateral production port 47 connects to anintake conduit 53. Aflow interface device 55, such as a subsea pressure intensifier or oil separator, is connected tointake conduit 53, which is preferably shorter than it appears in the drawings. - The
device 55, or an outlet conduit extending therefrom (not shown), is connected to a utility skidtree support system 61. In one embodiment,system 61 comprises awing block 63 having an extended length, ahorizontal bore 65 and avertical bore 71 extending upward therefrom todevice 55. Thewing block 63 may be mounted totree 13 as shown on alip 66, or integrally formed with tree 13 (not shown).Horizontal bore 65 has aproduction wing valve 67 that is mounted adjacent to and in fluid communication withproduction master valve 25 andlateral production port 23.Horizontal bore 65 may be interconnected to achoke body 69, which also may comprise a T-conduit or still other equipment. - As best shown in
FIG. 1 ,production wing valve 67 may be located horizontally closer toproduction master valve 25 than to anend face 70 ofwing block 63. In contrast,vertical bore 71 is located horizontally closer toend face 70 thanproduction master valve 25. In a similar non-symmetrical sense,horizontal bore 65 is located closer to left side face 72 (FIGS. 2 and 3 ) ofwing block 63 thanright side face 74 thereof. - In one embodiment, a
block leg 73 extends downward fromwing block 63 directly beneathwing valve 67.Block leg 73 extends across the entire width W ofwing block 63, and has a horizontallower surface 75 and achamfer 77 as shown. In addition, awide groove 79 is formed on atop surface 81 ofwing block 63. As shown inFIG. 2 , groove 79 may extend from end face 70 totree 13 as shown. Alternatively, groove 79 may be offset from end face 70 (FIG. 3 ) and intersect anorthogonal shelf 83 formed below and parallel totop surface 81. In one embodiment,groove 79 is located directly abovehorizontal bore 65, such that it too is closer to leftside face 72 thanright side face 74. This configuration segments thetop surface 81 into a smaller portion (see left side ofFIG. 2 ) and a larger portion (right side ofFIG. 2 ). A complementaryvertical groove 85 is formed on the side oftree 13 and aligns withgroove 79. - Referring again to
FIGS. 1 and 3 , thesupport system 61 further comprises autility skid 101 having an elongated body with arectangular foot 103 extending downward therefrom.Foot 103 is closely received by groove 79 (FIG. 3 ) and groove 85 (FIG. 2 ) intree 13 for mating engagement therewith. Aflat ring 105 protrudes horizontally from a tree side end ofskid 101.Ring 105 has anopening 107 for receivingmandrel 33 as shown, which helps to locate and alignskid 101 with respect to thetree 13 andsupport system 61. Skid 101 may be provided with anoptional tab 109 that extends vertically downward from an opposite end thereof with respect toring 107.Tab 109 engagesvertical bore 71 inwing block 63 to complete a mating alignment betweenskid 101 andwing block 63. - In operation, the well would initially be producing with sufficient pressure to flow well fluid to a surface processing facility. In such case,
adapter 35,device 55 and itsconduit 53 would not be located subsea. Instead, a choke insert (not shown) may be located inchoke body 69. An internal tree cap (not shown) would be located at the upper end oftree 13 for sealingbore 15. A plug (not shown) would be located inprofile 31. The fluid would flow out throughvalves choke body 69, and into a production flow line. - If the pressure of the well depletes sufficiently so as to require a booster pump, the operator would then connect a riser (not shown) to
tree mandrel 33. The operator closesvalves production port 23, make up a main flow path. The operator removes the internal tree cap through the riser while leaving the crown plug withincrown profile 31. With the assistance of an ROV, the operator removes the choke insert fromchoke body 69. The operator then removes the riser and lowersadapter 35,device 55 and itsconduit 53 as a unit.Seal sub 39 stabs sealingly into tubing hanger bore 21.Connector 37 connectsadapter 35 in place, anddevice 55 is connected towing block 63. A downward force due to the weight ofdevice 55 passes throughadapter 35 andtree 13 intowellhead housing 11. - The operator reconnects the riser at this time to
adapter mandrel 49. With a wireline tool, the operator removes plug 45 from its position abovelateral production port 47. The operator opensvalve 43 and removes the crown plug fromprofile 31 and reinstalls plug 45 aboveproduction port 47. Alternatively, the crown plug could be re-located fromprofile 31 to the position aboveproduction lateral port 47, thus serving asplug 45. The riser is removed anddebris cap 51 is installed onadapter 35. - Opening valve 97 and supplying power to pressure
intensifier 109 causes well fluid to be flow from production bore 76 through passage 96,port 101, andconduit 107 topressure intensifier 109.Pressure intensifier 109 pumps the fluid out conduit 111 throughchoke body 83 into the flow line. Adapter passage 96,conduits 107, 111 andpressure intensifier 109 thus create a bypass flow path. -
Device 55 also may operate in combination with a downhole electrical submersible pump suspended on tubing. If the assembly is to be used as an injection well,device 55 would operate in the reverse direction and fluid would flow fromchoke body 69 todevice 55, which pumps fluid downproduction passage 21. Ifdevice 55 is to be utilized from the beginning, it could be lowered and installed initially along withtree 13. In that instance, a T-conduit would typically be used forchoke body 69. For removingdevice 55 to repair or replace it, the operator attaches a riser, removes plug 45 and lowers a crown plug intocrown plug profile 31. - Alternately, plug 45 may be released, lowered and reset in
crown plug profile 31. The operator disengagesconnector device 55 andconnector 37 and retrieves the assembly to the surface. The operator then lowers the assembly with a new or repaireddevice 55 and repeats the process. In addition, the operator has the ability of lowering tools or instruments on wireline or coiled tubing intotubing 19 by removingdebris cap 51 and connecting a riser tomandrel 49.Plug 45 is then removed through the riser, providing access for wireline tools. - The invention has significant advantages. Supporting utility skids with a wing block for the tree utilizes the extensive strength of the tree mandrel to avoid the need for specially constructed supporting frames. Equipment such as pump assemblies can be readily installed and retrieved for maintenance. The assembly allows access to the tree tubing and tubing annulus for workover operations. The system reacts and transfers installation loads and potential snag loads to the conductor. The tree accepts skids for flow boosting, metering, water-oil separation, etc.
- While the invention has been shown or described in only some of its forms, it should be apparent to those skilled in the art that it is not so limited, but is susceptible to various changes without departing from the scope of the invention.
Claims (19)
1. A production tree, comprising:
a tree body having a bore, a lateral production port extending from the bore, and a mandrel;
a utility skid tree support system having a wing block and a utility skid;
the wing block is mounted to the tree body below the mandrel and has a horizontal bore aligned with the lateral production port, and a vertical bore extending from the horizontal bore, a groove formed on a top surface of the wing block; and
the utility skid having a foot received by the groove, and an aligning member for engaging the mandrel to locate and align the utility skid with respect to the tree body.
2. A production tree according to claim 1 , wherein the aligning member comprises a flat ring that protrudes horizontally from the utility skid and circumscribes the mandrel.
3. A production tree according to claim 1 , wherein a tab extends vertically downward from the utility skid opposite the aligning member and engages the vertical bore in the wing block.
4. A production tree according to claim 1 , wherein the tree body has a lip for supporting the wing block.
5. A production tree according to claim 1 , wherein the wing block is integrally formed with the tree body.
6. A production tree according to claim 1 , wherein the wing block has a production wing valve that is located horizontally closer to the tree body than to an opposite end face of the wing block, the vertical bore is located horizontally closer to the opposite end face than to the tree body, and the horizontal bore is located closer to one side face of the wing block than an opposite side face thereof.
7. A production tree according to claim 1 , wherein the wing block has a block leg extending downward therefrom, the block leg extending across an entire width of the wing block transverse to a direction of the horizontal bore, and the block leg having a horizontal lower surface and a chamfer on one side thereof.
8. A production tree according to claim 1 , wherein the groove extends from an end face of the wing block to the tree body.
9. A production tree according to claim 1 , wherein the groove is offset from an end face of the wing block and intersects a shelf formed below and parallel to a top surface of the wing block.
10. A production tree according to claim 9 , wherein the groove is located directly above the horizontal bore, such that the groove is closer to one side face of the wing block than an opposite side face thereof, and the tree body has a complementary vertical groove formed on a side thereof that aligns with the groove.
11. A production tree, comprising:
a tree body having a bore, a lateral production port extending from the bore, and a mandrel;
a utility skid tree support system having a wing block and a utility skid;
the wing block is mounted to the tree body below the mandrel and has a horizontal bore aligned with the lateral production port, and a vertical bore extending from the horizontal bore, a groove formed on a top surface of the wing block;
the utility skid having a foot received by the groove, and an aligning member for engaging the mandrel to locate and align the utility skid with respect to the tree body; and
the wing block has a production wing valve that is located horizontally closer to the tree body than to an opposite end face of the wing block, and the vertical bore is located horizontally closer to the opposite end face than to the tree body.
12. A production tree according to claim 11 , wherein the aligning member comprises a flat ring that protrudes horizontally from the utility skid and circumscribes the mandrel.
13. A production tree according to claim 11 , wherein a tab extends vertically downward from the utility skid opposite the aligning member and engages the vertical bore in the wing block.
14. A production tree according to claim 11 , wherein the tree body has a lip for supporting the wing block.
15. A production tree according to claim 11 , wherein the wing block is integrally formed with the tree body.
16. A production tree according to claim 11 , wherein the horizontal bore is located closer to one side face of the wing block than an opposite side face thereof.
17. A production tree according to claim 11 , wherein the wing block has a block leg extending downward therefrom, the block leg extending across an entire width of the wing block transverse to a direction of the horizontal bore, and the block leg has a horizontal lower surface and a chamfer on one side thereof.
18. A production tree according to claim 11 , wherein the groove extends from an end face of the wing block to the tree body.
19. A production tree according to claim 11 , wherein the groove is offset from an end face of the wing block and intersects a shelf formed below and parallel to a top surface of the wing block, the groove is located directly above the horizontal bore, such that the groove is closer to one side face of the wing block than an opposite side face thereof, and the tree body has a complementary vertical groove formed on a side thereof that aligns with the groove.
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US11/942,230 US20080128139A1 (en) | 2006-11-09 | 2007-11-19 | Utility skid tree support system for subsea wellhead |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US11/595,444 US7740074B2 (en) | 2003-10-23 | 2006-11-09 | Tree mounted well flow interface device |
US11/942,230 US20080128139A1 (en) | 2006-11-09 | 2007-11-19 | Utility skid tree support system for subsea wellhead |
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US11/595,444 Continuation-In-Part US7740074B2 (en) | 2003-10-23 | 2006-11-09 | Tree mounted well flow interface device |
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US20080128139A1 true US20080128139A1 (en) | 2008-06-05 |
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US11/942,230 Pending US20080128139A1 (en) | 2006-11-09 | 2007-11-19 | Utility skid tree support system for subsea wellhead |
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Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
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US20060237194A1 (en) * | 2003-05-31 | 2006-10-26 | Des Enhanced Recovery Limited | Apparatus and method for recovering fluids from a well and/or injecting fluids into a well |
US20090126938A1 (en) * | 2007-11-19 | 2009-05-21 | Vetco Gray Inc. | Utility skid tree support system for subsea wellhead |
US20100025034A1 (en) * | 2006-12-18 | 2010-02-04 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
US8066076B2 (en) | 2004-02-26 | 2011-11-29 | Cameron Systems (Ireland) Limited | Connection system for subsea flow interface equipment |
US8066063B2 (en) | 2006-09-13 | 2011-11-29 | Cameron International Corporation | Capillary injector |
US8104541B2 (en) | 2006-12-18 | 2012-01-31 | Cameron International Corporation | Apparatus and method for processing fluids from a well |
US20130000918A1 (en) * | 2011-06-29 | 2013-01-03 | Vetco Gray Inc. | Flow module placement between a subsea tree and a tubing hanger spool |
CN103492666A (en) * | 2011-04-28 | 2014-01-01 | 阿克海底公司 | Subsea well assembly and associated method |
WO2015009577A1 (en) * | 2013-07-17 | 2015-01-22 | Cameron International Corporation | Self-draining production assembly |
US9702215B1 (en) | 2016-02-29 | 2017-07-11 | Fmc Technologies, Inc. | Subsea tree and methods of using the same |
US20190284901A1 (en) * | 2016-07-27 | 2019-09-19 | Fmc Technologies, Inc. | Ultra-Compact Subsea Tree |
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Owner name: VETCO GRAY INC., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WHITE, PAUL W.;REEL/FRAME:020594/0434 Effective date: 20080213 |
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