CN117052338A - Underwater horizontal type Christmas tree assembly for shallow water - Google Patents
Underwater horizontal type Christmas tree assembly for shallow water Download PDFInfo
- Publication number
- CN117052338A CN117052338A CN202311164490.4A CN202311164490A CN117052338A CN 117052338 A CN117052338 A CN 117052338A CN 202311164490 A CN202311164490 A CN 202311164490A CN 117052338 A CN117052338 A CN 117052338A
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- Prior art keywords
- valve
- tree
- christmas tree
- frame
- valve block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 241000191291 Abies alba Species 0.000 title claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims description 51
- 238000012360 testing method Methods 0.000 claims description 29
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims description 10
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 238000002955 isolation Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 230000012010 growth Effects 0.000 claims description 2
- 210000002445 nipple Anatomy 0.000 claims 3
- 230000001681 protective effect Effects 0.000 claims 1
- 235000004507 Abies alba Nutrition 0.000 description 70
- 239000000243 solution Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- WJRBRSLFGCUECM-UHFFFAOYSA-N hydantoin Chemical compound O=C1CNC(=O)N1 WJRBRSLFGCUECM-UHFFFAOYSA-N 0.000 description 2
- 229940091173 hydantoin Drugs 0.000 description 2
- 230000005789 organism growth Effects 0.000 description 2
- 239000013043 chemical agent Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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 OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B33/037—Protective housings therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B34/00—Valve arrangements for boreholes or wells
- E21B34/02—Valve arrangements for boreholes or wells in well heads
- E21B34/04—Valve arrangements for boreholes or wells in well heads in underwater well heads
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
Abstract
The invention relates to an underwater horizontal christmas tree assembly for shallow water, comprising: the tree frame is formed by detachably connecting a tree upper frame and a tree lower frame, the tree upper frame comprises a top plate and a plurality of upper guide posts positioned below the top plate, the tree lower frame comprises a bottom plate and a plurality of lower guide posts positioned above the bottom plate, and the lower guide posts are arranged in one-to-one correspondence with the upper guide posts; the anode blocks are in a plurality, one end of each anode block is connected with the upper guide column, and the other end of each anode block is connected with the top plate; the main valve block assembly of the Christmas tree comprises a main valve block which is arranged in the Christmas tree frame; the connector is arranged below the main valve block and is connected with the main valve block; the energy accumulator is arranged in the Christmas tree frame and is connected with the lower frame of the Christmas tree. The device adopts modularized design, and the interface can be realized through changing corresponding modules after changing, so that the integral structure of the Christmas tree can not be influenced.
Description
Technical Field
The invention relates to an underwater horizontal type Christmas tree assembly for shallow water, and belongs to the technical field of offshore oil and gas drilling equipment.
Background
The underwater christmas tree is used as key equipment of an underwater production system, and has the functions of mainly controlling and regulating oil and gas production to realize various underground operations, and mainly comprises a christmas tree body, a production wing valve, an annular wing valve, an oil pipe hanger, a production throttle valve, an annular passage and the like. The installation position of the underwater christmas tree according to the production main valve can be divided into a horizontal christmas tree and a vertical christmas tree, the installation process of the horizontal christmas tree is simple, and the later well repair operation is easy, so that the application of the horizontal christmas tree is wider.
The underwater Christmas tree has a complex structure, various parts and components, relates to mechanical, hydraulic and electric interfaces of various underwater equipment, and needs to realize interface matching, thereby ensuring that the effective connection difficulty between the underwater Christmas tree and other underwater equipment is high. The traditional christmas tree has large size and weight, and has high requirements on the protection of underwater christmas trees in shallow hydantoin navigation and fishery.
Disclosure of Invention
Aiming at the technical problems, the invention provides the underwater horizontal christmas tree assembly for shallow water, the christmas tree is a fully-protected, integrated and modularized underwater horizontal christmas tree, the change of the interface can be realized by changing or optimizing the corresponding module, the integral structure of the christmas tree is not influenced, the universality of the structure of the underwater horizontal christmas tree is ensured, and the compact and integrated design ensures that the underwater christmas tree has more advantages in size and weight.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an underwater horizontal tree assembly for shallow water, comprising:
the tree structure comprises a tree frame, wherein the tree frame is formed by detachably connecting a tree upper frame and a tree lower frame, the tree upper frame comprises a top plate and a plurality of upper guide posts positioned below the top plate, the tree lower frame comprises a bottom plate and a plurality of lower guide posts positioned above the bottom plate, and the lower guide posts are arranged in one-to-one correspondence with the upper guide posts;
the number of anode blocks is several, one end of each anode block is connected with the upper guide post, and the other end of each anode block is connected with the top plate;
the main valve block assembly of the Christmas tree comprises a main valve block which is arranged in the Christmas tree frame;
the connector is arranged below the main valve block and is connected with the main valve block;
the energy accumulator is arranged in the Christmas tree frame and is connected with the lower frame of the Christmas tree.
Preferably, the lower frame of the christmas tree is further provided with a counterweight plate, and the counterweight plate is provided with a connecting hole and is fixed on the lower frame of the christmas tree through bolts.
Preferably, the underwater horizontal christmas tree assembly is further provided with a torsion extension bar in the christmas tree frame, the torsion extension bar is connected with the connector, and the torsion extension bar is connected with the locking block and is fixed on the beam of the christmas tree lower frame through bolts.
Preferably, the main valve block assembly of the production tree further comprises an annular wing valve block, a production wing valve block and an electro-hydraulic crossing device, wherein the annular wing valve block and the production wing valve block are arranged on two sides of the main valve block, and the electro-hydraulic crossing device is arranged on the main valve block.
Preferably, the main valve block is further provided with an annulus inlet valve, an annulus main valve, a production main valve, a cavity testing valve and a connection backing ring testing valve.
The production wing valve block is provided with a methanol injection valve, a production wing valve and a conversion valve, the annulus wing valve block is provided with an annulus relief valve and an annulus wing valve, the annulus wing valve is connected with the conversion valve through an annulus passage, and the annulus relief valve is connected with an ROV torque tool interface (18) through an extension rod.
The production throttle valve, the short section and the elbow are arranged in the production tree frame, the production wing valve block is connected with the elbow and the production throttle valve respectively through the flange, the elbow is connected with the short section through the flange, the short section is connected with the blind flange, and the throttle valve opening indicating needle is arranged at the top of the production throttle valve.
Preferably, the underwater horizontal christmas tree frame is further provided with a diver operation panel and an MQC panel, and the MQC panel is provided with an electric flywire interface, an annular pressure relief valve/blanking plug test interface, a cavity test/connection backing ring test interface, an MQC interface and an MQC protection shell.
Preferably, the submarine horizontal christmas tree assembly is characterized in that the submarine operator panel is integrated with a blanking plug testing valve, an underground safety valve isolating valve and an underground chemical agent injection isolating valve, and a marine organism growth cover plate is arranged at the interface of the ROV torsion tool.
The underwater horizontal christmas tree assembly preferably further comprises a protection device, and the protection device adopts a split type design so as to realize independent lowering and recovery.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the Christmas tree protection device adopts full protection, avoids risks brought by shallow sea navigation and fishery, is of split design, and is independently lowered and recycled.
2. The underwater horizontal type Christmas tree assembly adopts a modularized design, and the interface can be realized by replacing corresponding modules after being changed, so that the integral structure of the Christmas tree is not influenced.
3. On the premise of guaranteeing the functions and the safe production of the underwater horizontal christmas tree assembly, the invention optimizes the size of a runner and the layout form of the christmas tree, reduces the overall size and the weight, optimizes the structural layout of the balancing weight and reduces the use of the balancing weight.
4. The annular wing valve, the production wing valve and the annular inlet valve are combined by hydraulic control and mechanical control, so that the use safety is improved, and the connector is a mechanical connector, so that the weight and the height are reduced.
Drawings
FIG. 1 is an isometric view of an underwater horizontal tree assembly according to one embodiment of the present invention;
FIG. 2 is an assembly view of a main valve block in the subsea horizontal tree assembly provided in accordance with the present invention;
FIG. 3 is a left side view of the subsea horizontal tree assembly provided in accordance with the present invention;
FIG. 4 is a top view of the subsea horizontal tree assembly provided in accordance with this embodiment of the present invention;
FIG. 5 is a cross-sectional view of the subsea horizontal tree assembly with the protection device provided by this embodiment of the invention;
the figures are marked as follows:
1-a production throttle valve; 2-pup joint; 3-elbow; 4-a main valve block; 5-annulus wing valve blocks; 6-producing wing valve blocks; 7-electrohydraulic traversing device; 8-producing a main valve; 9-annulus bleed valves; 10-annulus wing valves; 11-annulus access valve; 12-cavity test valve; 13-methanol injection valve; 14-switching valve; 15-connectors; 16-production wing valves; 17-an extension rod; an 18-ROV torque tool interface; 19-annulus passage; 20-torsion extension bar; 21-a marine organism growth cover plate; 22-tree lower frame; 23-blanking plug test valve; 24-producing a main valve; 25-connecting a backing ring test valve; 26-weight plate; 27-annulus main valve; 28-a subsurface safety valve isolation valve; 29-a downhole chemical injection isolation valve; 30-a tree upper frame; 31-anode block; a 32-accumulator; 33-clamping hoop; 34-throttle opening indicator; 35-a dock leveler; 36-blind hot needling; a 37-MQC interface; 38-a guard; 39-MQC panel; 40-diver operation panel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the present invention will be clearly and completely described below, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are intended to be within the scope of the present disclosure.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The terms "first," "second," "third," "fourth," and the like as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.
For ease of description, spatially relative terms, such as "inner," "outer," "lower," "upper," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.
The underwater Christmas tree has a complex structure, various parts and components, relates to mechanical, hydraulic and electric interfaces of various underwater equipment, and needs to realize interface matching, thereby ensuring that the effective connection difficulty between the underwater Christmas tree and other underwater equipment is high. The traditional christmas tree has large size and weight, and has high requirements on the protection of underwater christmas trees in shallow hydantoin navigation and fishery.
Based on the problems, the invention provides the fully-protected, integrated and modularized underwater horizontal christmas tree, the change of the interface can be realized by changing or optimizing the corresponding module, the integral structure of the christmas tree is not influenced, the universality of the underwater horizontal christmas tree structure is ensured, and the compact and integrated design ensures that the underwater christmas tree has more advantages in size and weight.
The technical scheme of the invention is described in detail below with reference to the accompanying drawings.
As shown in fig. 1 and 2, the underwater horizontal christmas tree assembly according to the present invention comprises a christmas tree frame having a rectangular structure, the christmas tree frame comprising an upper christmas tree frame 30 and a lower christmas tree frame 22, the upper christmas tree frame 30 and the lower christmas tree frame 22 being connected by bolts. Specifically, the tree upper frame 30 includes a top plate and a plurality of upper guide posts located below the top plate, and the tree lower frame 22 includes a bottom plate and a plurality of lower guide posts located above the bottom plate, and the lower guide posts are arranged in one-to-one correspondence with the upper guide posts and are connected to the upper guide posts by flanges.
Further, as shown in fig. 1 and 3, the christmas tree frame is fixed with a diver operation panel 40 and an MQC panel 39 by bolts, the anode blocks 31 are fixed on the upper guide posts of the christmas tree upper frame 30 and the cross beams of the top plate (the christmas tree upper frame 30 is connected with the top plate, and the anode blocks 31 are respectively installed at three corners of the top plate), and the lower end of the lower guide post of the christmas tree lower frame 22 is provided with a horn mouth, so as to facilitate centering the permanent guide base of the wellhead.
In a preferred embodiment of the present invention, as shown in fig. 1, the weight plates 26 are provided on the lower frame 22 of the christmas tree, the weight plates 26 are vertically distributed on one side of the lower frame 22 of the christmas tree by optimizing the structural layout of the weight plates 26, the weight plates 26 are provided with through connection holes, and are fixed on the lower frame 22 of the christmas tree by bolts, and the gravity center of the underwater horizontal christmas tree assembly is optimized by the weight plates 26, so that the christmas tree can maintain a vertical posture during the lowering process, as shown in fig. 1.
Further, the tree lower frame 22 is bolted to the connector 15 (EZ-LOCK connector, HUB profile 25 ° chamfer is optimized to 30 ° at the EZ-LOCK connection, reducing the number of EZ-LOCK jackscrews, reducing diver's working time.) and the connector 15 is connected to the main valve block 4, the tree lower frame 22 is connected to the accumulator 32, and the accumulator 32 is connected to the support beam of the tree lower frame 22 by the clip 33.
In a preferred embodiment of the invention, the connector 15 is connected to a torsion extension bar 20, and the torsion extension bar 20 is connected to a locking block and bolted to the cross beam of the tree lower frame 22.
Further, as shown in fig. 2, the main valve block assembly of the christmas tree further comprises an annular wing valve block 5, a production wing valve block 6 and an electro-hydraulic penetrator 7, wherein the annular wing valve block 5 and the production wing valve block 6 are arranged on two sides of the main valve block 4, and the electro-hydraulic penetrator 7 is arranged on the main valve block 4.
Specifically, as shown in fig. 1 and 2, the main valve block 4 is further provided with an annulus access valve 11, an annulus main valve 27, a production main valve 8, a cavity test valve 12 and a connection pad ring test valve 25. The production wing valve block 6 is provided with a methanol injection valve 13, a production wing valve 16 and a conversion valve 14, the annulus wing valve block 5 is provided with an annulus relief valve 9 and an annulus wing valve 10, the annulus wing valve 10 is connected with the conversion valve 14 through an annulus passage 19, and the annulus relief valve 9 is connected with an ROV torque tool interface 18 through an extension rod 17.
Further, as shown in fig. 1, a production throttle valve 1, a short section 2 and an elbow 3 are further arranged in the christmas tree frame, a production wing valve block 6 is respectively connected with the elbow 3 and the production throttle valve 1 through flanges, the elbow 3 is connected with the short section 2 through flanges, the short section 2 is connected with a blind flange, and a throttle opening indicating needle 34 is arranged at the top of the production throttle valve 1.
Further, as shown in fig. 3, a diver operation panel 40 and an MQC panel 39 are further provided on the christmas tree frame, and an Electric Fly Line (EFL) interface, an annular pressure relief valve (ABV)/plug test (CPT) interface, a Cavity Test (CT)/connection Grommet Test (GT) interface, an MQC interface 37 and an MQC protection shell are fixed on the MQC panel. The blind thermal stab 36 is arranged on the annular pressure relief valve/blanking plug test interface and the cavity test/connection backing ring test interface, and a stop plate for placing the blind thermal stab is fixed on the MQC panel.
The diver operator panel 40 is located on the front of the christmas tree, and the diver operator panel 40 is integrated with the downhole chemical injection isolation valve 29, the downhole safety valve isolation valve 28, and the plug test valve 23 in addition to the various valve interfaces in the main valve block assembly. At the ROV torque tool interface 18 of each valve a marine growth cover plate 21 is mounted. The diver operator panel 40 is focused on the tree front panel, with the MQC panel 39 on the left side of the front panel for workover and production use.
Further, as shown in fig. 5, the underwater horizontal christmas tree assembly further comprises a protecting device 38, wherein the protecting device 38 adopts a split type design, so that independent lowering and recovery are realized. The protection device is made of glass fiber reinforced plastic materials, is of a fully-closed structure, and can play a better role in protecting the horizontal christmas tree.
The invention also provides the working principle of the underwater horizontal christmas tree assembly:
after the underwater horizontal christmas tree assembly is installed onto the wellhead, the underwater horizontal christmas tree assembly is tested through the interface of the MQC panel 39 to ensure that the components of the christmas tree are installed in place. The blind thermal stabs 36 of the annulus bleed valve/plug interface on the MQC panel 39 are pulled out, the rest plate 35 is inserted, and the thermal stabs required for testing are inserted into the interface, so that the annulus bleed valve/plug can be tested. And (3) pulling out the blind hot stabs of the cavity test interface/connection backing ring test interface, and inserting the hot stabs required by the test to test the cavity/connection backing ring.
When the underground oil/gas enters the production wing valve 16 through the oil pipe hanger, the underground oil/gas flows into the production throttle valve 1 through a passage between the production wing valve 16 and the production throttle valve 1, and is connected with an oil outlet pipeline through an elbow 3 and a short section 2 which are connected with the lower end of the production throttle valve 1. The pressure in the closed space formed by the oil pipe hanger and the casing hanger in the production process enters the annular wing valve 10 through a channel in the annular wing valve group, enters the conversion valve 14 through the annular passage 19, and is discharged through a passage in the production wing valve group to finish pressure relief; or the generated pressure enters the annular relief valve 9 through a passage in the annular wing valve group, and the annular relief valve is controlled through the MQC to realize the purpose of pressure relief.
In the production process, each valve of the underwater horizontal oil production is controlled through the MQC according to the data acquired by the related sensor in the underwater horizontal oil production tree assembly, so that the normal production process is ensured.
The device has reasonable structural arrangement, the driving modes of the valves and connectors are high in reliability, the hydraulic gate valve and the production throttle valve are provided with ROV override devices, and the hydraulic gate valve has a fault shutoff function. The operation safety and reliability are ensured.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. An underwater horizontal tree assembly for shallow water, comprising:
the tree frame is formed by detachably connecting a tree upper frame (30) and a tree lower frame (22), the tree upper frame (30) comprises a top plate and a plurality of upper guide posts positioned below the top plate, the tree lower frame (22) comprises a bottom plate and a plurality of lower guide posts positioned above the bottom plate, and the lower guide posts and the upper guide posts are arranged in one-to-one correspondence;
the number of anode blocks (31) is several, one end of each anode block (31) is connected with the upper guide column, and the other end is connected with the top plate;
the main valve block assembly of the Christmas tree comprises a main valve block (4) which is arranged in the Christmas tree frame;
a connector (15) which is provided below the main valve block (4) and is connected to the main valve block (4);
and an accumulator (32) which is arranged in the Christmas tree frame and is connected with the Christmas tree lower frame (22).
2. The subsea horizontal tree assembly according to claim 1, wherein the tree lower frame (22) is further configured with a weight plate (26), the weight plate (26) being provided with connection holes and being bolted to the tree lower frame (22).
3. The subsea horizontal tree assembly according to claim 1, characterized in that a torsion extension bar (20) is further provided in the tree frame, the torsion extension bar (20) being connected to the connector (15), the torsion extension bar (20) being connected to the locking block and being fastened to the cross beam of the tree lower frame (22) by means of bolts.
4. The subsea horizontal tree assembly according to claim 1, further comprising an annulus wing valve block (5), a production wing valve block (6) and an electro-hydraulic penetrator (7), the annulus wing valve block (5) and the production wing valve block (6) being mounted on both sides of the main valve block (4), the electro-hydraulic penetrator (7) being mounted on the main valve block (4).
5. The subsea horizontal tree assembly according to claim 1, wherein the main valve block (4) is further provided with an annulus access valve (11), an annulus main valve (27), a production main valve (8), a cavity test valve (12) and a connection grommet test valve (25).
6. The underwater horizontal christmas tree assembly according to claim 4, characterized in that the production wing valve block (6) is provided with a methanol injection valve (13), a production wing valve (16) and a conversion valve (14), the annulus wing valve block (5) is provided with an annulus relief valve (9) and an annulus wing valve (10), the annulus wing valve (10) is connected with the conversion valve (14) through an annulus passage (19), and the annulus relief valve (9) is connected with an ROV torsion tool interface (18) through an extension rod (17).
7. The underwater horizontal christmas tree assembly according to claim 4, characterized in that the production throttle valve (1), the nipple (2) and the elbow (3) are further arranged in the christmas tree frame, the production wing valve block (6) is respectively connected with the elbow (3) and the production throttle valve (1) through flanges, the elbow (3) is connected with the nipple (2) through flanges, the nipple (2) is connected with a blind flange, and a throttle opening indicator needle (34) is arranged at the top of the production throttle valve (1).
8. The subsea horizontal tree assembly according to claim 4, wherein the tree frame is further provided with a diver operation panel (40) and an MQC panel (39), the MQC panel (39) being provided with an electric fly line interface, an annulus pressure relief valve/plug test interface, a cavity test/connection grommet test interface, an MQC interface (37) and an MQC protective shell.
9. The subsea horizontal tree assembly according to claim 8, wherein the diver operation panel (40) is integrated with a plug test valve (23), a subsurface safety valve isolation valve (28) and a subsurface chemical injection isolation valve (29), and a marine growth cover plate (21) is mounted at the ROV torque tool interface (18).
10. The subsea horizontal tree assembly according to claim 1, further comprising a guard (38), the guard (38) being of split design to enable separate lowering and recovery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311164490.4A CN117052338A (en) | 2023-09-11 | 2023-09-11 | Underwater horizontal type Christmas tree assembly for shallow water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311164490.4A CN117052338A (en) | 2023-09-11 | 2023-09-11 | Underwater horizontal type Christmas tree assembly for shallow water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117052338A true CN117052338A (en) | 2023-11-14 |
Family
ID=88664478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311164490.4A Pending CN117052338A (en) | 2023-09-11 | 2023-09-11 | Underwater horizontal type Christmas tree assembly for shallow water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117052338A (en) |
-
2023
- 2023-09-11 CN CN202311164490.4A patent/CN117052338A/en active Pending
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