CN113756737B - Oil pipe hanger device for shallow water underwater Christmas tree - Google Patents
Oil pipe hanger device for shallow water underwater Christmas tree Download PDFInfo
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- CN113756737B CN113756737B CN202111117981.4A CN202111117981A CN113756737B CN 113756737 B CN113756737 B CN 113756737B CN 202111117981 A CN202111117981 A CN 202111117981A CN 113756737 B CN113756737 B CN 113756737B
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- hanger body
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 30
- 241000191291 Abies alba Species 0.000 title claims abstract description 29
- 238000007789 sealing Methods 0.000 claims abstract description 203
- 238000002347 injection Methods 0.000 claims abstract description 42
- 239000007924 injection Substances 0.000 claims abstract description 42
- 238000012360 testing method Methods 0.000 claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 6
- 239000002184 metal Substances 0.000 claims description 179
- 238000012544 monitoring process Methods 0.000 claims description 50
- 238000010008 shearing Methods 0.000 claims description 16
- 239000013043 chemical agent Substances 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 210000002445 nipple Anatomy 0.000 claims 2
- 230000000694 effects Effects 0.000 claims 1
- 239000003921 oil Substances 0.000 abstract 5
- 239000010720 hydraulic oil Substances 0.000 abstract 2
- 235000004507 Abies alba Nutrition 0.000 description 22
- 239000000126 substance Substances 0.000 description 6
- 238000009434 installation Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 238000002955 isolation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005553 drilling Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000004064 recycling Methods 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
- E21B23/00—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells
- E21B23/01—Apparatus for displacing, setting, locking, releasing or removing tools, packers or the like in boreholes or wells for anchoring the tools or the like
-
- 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
- E21B47/00—Survey of boreholes or wells
-
- 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
- E21B47/00—Survey of boreholes or wells
- E21B47/10—Locating fluid leaks, intrusions or movements
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)
- Geophysics (AREA)
- Earth Drilling (AREA)
- Pipe Accessories (AREA)
Abstract
The invention relates to an oil pipe hanger device for a shallow water underwater christmas tree, which is characterized by comprising an electrohydraulic traversing device connecting assembly, a hydraulic oil pipe hanger device and a hydraulic oil pipe hanger device, wherein the electrohydraulic traversing device connecting assembly is used for forming electrohydraulic connection between an external electrohydraulic traversing device and an internal channel of an oil pipe hanger body; the sitting and blocking assembly is used for fixing the oil pipe hanger body on the production tree; the sealing assembly comprises a first sealing assembly and a second sealing assembly, and the first sealing assembly and the second sealing assembly are respectively used for sealing the electrohydraulic traversing device connecting assembly and a horizontal channel for communicating the tree body of the christmas tree and the tubing hanger body; the pressurized injection channel system is used for performing a sealing test; the delivery tool guide assembly is used for positioning and guiding when the delivery tool is connected with the oil pipe hanger body; and the positioning assembly is used for positioning and guiding when the oil pipe hanger body is connected with the Christmas tree. The tubing hanger device can be simply and quickly launched and retrieved by a mechanical mode.
Description
Technical Field
The invention relates to the technical field of petroleum drilling equipment, in particular to an oil pipe hanger device for a shallow water underwater Christmas tree.
Background
The underwater Christmas tree is widely applied to the exploitation process of the underwater oil and gas field, and is very important equipment in the well drilling and completion and oil extraction processes. The shallow water underwater Christmas tree is suitable for shallow water oil and gas fields, the general operation water depth is shallow, the visibility of the seabed is poor, and the underwater installation and recovery operation is carried out by combining divers with ground operation to replace an underwater robot. The tubing hanger is one of the main components of the subsea tree and is positioned in the tree body, and has the main functions of hanging a production string, sealing an annular space between the production string and a production casing, and providing the functions of an oil flow channel, a workover channel, a downhole safety valve hydraulic channel, a chemical reagent injection channel and the like.
The oil pipe hanger system of the existing deep water underwater Christmas tree system is complex in structure, and the underwater robot is adopted to carry out lowering and recycling in a hydraulic mode, so that the oil pipe hanger system cannot be matched with a shallow water Christmas tree in a shallow water environment. An oil pipe hanger device which is suitable for shallow water christmas trees and is simple and quick to put in and recover in a mechanical mode is developed so as to meet the development requirements of shallow water oil and gas fields.
Disclosure of Invention
In view of the above problems, it is an object of the present invention to provide a tubing hanger apparatus for shallow water subsea trees that can be mechanically simply and quickly deployed and retrieved.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an oil pipe hanger device for a shallow water underwater christmas tree comprises an oil pipe hanger body, an electrohydraulic traversing device connecting assembly, a sitting and blocking assembly, a sealing assembly, a pressing injection channel system, a taking and delivering tool guiding assembly and a positioning assembly, wherein the electrohydraulic traversing device connecting assembly, the sitting and blocking assembly, the sealing assembly, the pressing injection channel system and the positioning assembly are arranged on the oil pipe hanger body;
the electrohydraulic traversing device connecting assembly is used for electrohydraulic connection between the external electrohydraulic traversing device and the internal channel of the oil pipe hanger body;
the sitting locking assembly is used for fixing the oil pipe hanger body on the production tree;
the sealing assembly comprises a first sealing assembly and a second sealing assembly, and the first sealing assembly and the second sealing assembly are respectively used for sealing the electrohydraulic traversing device connecting assembly and a horizontal channel which is communicated with the tree body of the christmas tree and the tubing hanger body;
the pressurizing injection channel system is used for performing a sealing test;
the delivery tool guide assembly is used for positioning and guiding the delivery tool when the delivery tool is connected with the oil pipe hanger body;
the positioning assembly is used for positioning and guiding the oil pipe hanger body when the oil pipe hanger body is placed in the production tree.
Further, the setting lock assembly includes a setting ring, at least one upper shear pin, and a locking ring;
the oil pipe hanger body is sleeved with the setting ring, the outer side wall of the setting ring is conical, the outer diameter of the setting ring is gradually reduced from top to bottom, and the top of the setting ring is fixed on the oil pipe hanger body through the upper shearing pin;
the locking ring is sleeved outside the oil pipe hanger body, the locking ring is located below the setting ring, the locking ring is of a C-shaped structure with an opening, an annular space for receiving the setting ring is formed between the inner side wall of the locking ring and the outer side wall of the oil pipe hanger body, the inner side wall of the locking ring is conical and matched with the outer side wall of the setting ring, and at least one locking tooth is formed on the outer side wall of the locking ring along the axial direction.
Further, the setting locking assembly further comprises at least one guide screw, at least one setting ring guide groove corresponding to the guide screw one to one is formed in the outer side wall of the oil pipe hanger body along the circumferential direction, one end of the guide screw is fixed on the setting ring, and the other end of the guide screw is inserted into the corresponding setting ring guide groove along the horizontal direction.
Further, the seat locking assembly also comprises at least one lower shear pin housing, at least one lower shear pin mounted in the lower shear pin housing and in one-to-one correspondence with the lower shear pin housing, and a lower shear pin spring;
the inner side wall of the bottom of the setting ring is provided with at least one groove corresponding to the lower shearing pin one by one, the outer side wall of the oil pipe hanger body is also provided with at least one threaded hole corresponding to the lower shearing pin shell one by one, the lower shearing pin shell is fixed in the corresponding threaded hole, one end of the spring is fixed at the bottom of the lower shearing pin shell, and the other end of the spring is fixedly connected with the lower shearing pin;
when the tubing hanger is in an unlocking state, the lower shear pin extends out of the threaded hole; when the tubing hanger is in a locked state, the lower shear pins are inserted into the corresponding grooves.
Further, the electrohydraulic crossing device connecting assembly comprises a mounting panel, a blanking plug pressure test connector, an underground safety valve control pipeline horizontal connector, two electrohydraulic crossing device guide bushings, a horizontal electric connector and an underground chemical agent injection horizontal connector which are mounted on the mounting panel, wherein the mounting panel is mounted on the oil pipe hanger body.
Further, the first sealing assembly comprises at least two upper standby S-shaped sealing rings, a plurality of annular sealing grooves which are in one-to-one correspondence with the upper standby S-shaped sealing rings are formed in the outer side wall of the oil pipe hanger body, the S-shaped sealing rings are pressed in the corresponding annular sealing grooves, and the two upper standby S-shaped sealing rings are respectively located at the upper end and the lower end of the electro-hydraulic crossing device panel.
Further, the upper standby S-shaped sealing ring comprises three parts, wherein one part is positioned above the electrohydraulic traversing device connecting assembly, and the other two parts are positioned below the electrohydraulic traversing device connecting assembly.
Further, the second sealing assembly comprises an upper metal sealing ring, a metal sealing bush, a lower metal sealing ring and a sealing locking device, wherein the sealing locking device is positioned below the lower metal sealing ring and used for locking the upper metal sealing ring, the lower metal sealing ring and the metal sealing bush; the upper metal sealing ring and the lower metal sealing ring are both arranged at the position of a metal sealing overlaying layer on the oil pipe hanger body, the metal sealing bush is positioned between the upper metal sealing ring and the lower metal sealing ring, the metal sealing bush is an annular sealing bush, the upper end and the lower end of the metal sealing bush respectively prop against the upper metal sealing ring and the lower metal sealing ring, and a circular through hole concentric with a horizontal production channel is further formed in the side wall of the metal sealing bush.
Further, the cross sections of the upper metal sealing ring and the lower metal sealing ring are V-shaped, the openings of the upper metal sealing ring and the lower metal sealing ring are arranged oppositely, and the upper end and the lower end of the metal sealing bushing are respectively inserted into the openings of the upper metal sealing ring and the lower metal sealing ring and are used for supporting the upper metal sealing ring and the lower metal sealing ring.
Further, the sealing locking device comprises a metal sealing retaining ring fixedly sleeved on the outer wall of the oil pipe hanger body, wherein the metal sealing retaining ring is positioned below the lower metal sealing ring and used for locking the upper metal sealing ring, the lower metal sealing ring and the metal sealing bushing.
Further, the second seal assembly further comprises a backup seal assembly, wherein the backup seal assembly comprises a separating ring sleeved on the tubing hanger body, a first lower backup S-shaped seal ring, an S-shaped seal ring retaining ring, a second lower backup S-shaped seal ring and a bottom retaining ring; the separation ring is positioned below the metal sealing retaining ring, the first lower standby S-shaped sealing ring is positioned below the separation ring, the S-shaped sealing ring retaining ring is sleeved outside the first lower standby S-shaped sealing ring, and the top of the S-shaped sealing ring retaining ring is sleeved on the outer circle of the separation ring; the second lower standby S-shaped sealing ring is fixedly sleeved on the outer wall of the S-shaped sealing ring retaining ring, and the bottom retaining ring is arranged below the S-shaped sealing ring retaining ring and used for fastening the S-shaped sealing ring retaining ring.
Further, the delivery tool guide assembly comprises a delivery tool positioning key fixedly mounted at the top of the outer side wall of the oil pipe hanger body, and the delivery tool positioning key is matched with a positioning groove formed in the delivery tool to realize positioning.
Further, the positioning assembly comprises a coarse positioning assembly and a precise positioning assembly, wherein the coarse positioning assembly is used for coarse positioning between the oil pipe hanger and the christmas tree, and the precise positioning assembly is used for precise positioning between the oil pipe hanger and the christmas tree.
Further, the coarse positioning assembly comprises a directional bushing and a coarse positioning key, wherein the top of the directional bushing is fixedly connected with the bottom end of the oil pipe hanger body, and the coarse positioning key is fixedly installed at the lower part of the directional bushing.
Further, the precise positioning assembly comprises a precise positioning key fixedly mounted at the bottom of the oil pipe hanger body.
Further, the injection channel system of beating includes that last metal seal leaks monitored control system, is used for the control the leakage of last metal seal, go up the metal seal and reveal monitored control system including seting up go up the metal seal on the tubing hanger body lateral wall and reveal the monitored control passageway, seting up go up the metal seal at tubing hanger body top reveal the screw hole and with go up the metal seal leak threaded hole screwed connection go up the metal seal and reveal the monitored control joint, go up the metal seal reveal the top of monitored control passageway with go up the metal seal and reveal the monitored control joint intercommunication, the bottom is located go up the top of metal seal.
Further, the pressing injection channel system further comprises a lower metal seal leakage monitoring system, the lower metal seal leakage monitoring system is used for monitoring leakage of the lower metal seal, the lower metal seal leakage monitoring system comprises a lower metal seal leakage monitoring channel arranged on the oil pipe hanger body, a lower metal seal leakage threaded hole arranged at the top of the oil pipe hanger body and a lower metal seal leakage monitoring joint in spiral connection with the lower metal seal leakage threaded hole, the top of the lower metal seal leakage monitoring channel is communicated with the lower metal seal leakage monitoring joint, and the bottom of the lower metal seal leakage monitoring channel is located below the lower metal seal ring.
Further, the pressurizing injection channel system further comprises a connection sealing test system for performing sealing test on the connection position between the measuring and delivering tool and the oil pipe hanger body, the connection sealing test system comprises a top plug, a connection sealing test channel and a horizontal plug, the connection sealing test channel is formed in the side wall of the oil pipe hanger body, the top and the bottom of the connection sealing test channel are respectively plugged through the top plug and the bottom plug, a connection sealing test threaded hole is formed in the top of the oil pipe hanger body, and the top plug, the horizontal plug and the connection sealing test threaded hole of the connection sealing test system are in spiral connection.
Further, the top of the inner side of the oil pipe hanger body is also provided with left-hand fine tooth threads, and the taking tool is connected with the oil pipe hanger body through the left-hand fine tooth threads.
Due to the adoption of the technical scheme, the invention has the following advantages:
1. the installation and the disassembly are convenient, and the taking and delivering tool is matched with a special oil pipe hanger taking and delivering tool which is connected with the oil pipe hanger through fine teeth in a threaded manner, so that a plurality of series of actions such as lowering, positioning, setting, locking and the like are realized; the lifting tool can realize a series of actions of unlocking, lifting the oil pipe hanger and the like, and is convenient and quick to put in, install, lift and remove.
2. The crude positioning component and the accurate positioning component of the oil pipe hanger are matched with the isolation bushing arranged in the Christmas tree, the oil pipe hanger can automatically rotate along the spiral guide shoulder of the isolation bushing in the descending process, the direction of the oil pipe hanger is adjusted in the descending process, and the oil pipe hanger is thrown at any angle and positioned accurately.
3. The upper part of the setting ring is provided with a shearing pin, so that the setting ring can be prevented from automatically moving downwards to excite the locking ring to influence the lowering of the oil pipe hanger in the christmas tree.
4. The lower part of the setting ring is provided with an unlocking-preventing shear pin, after the setting ring moves downwards to a proper position and the locking ring is completely excited, the shear pin is clamped into a U-shaped groove in the setting ring, so that the oil pipe hanger can be reliably and stably located in the Christmas tree, and the oil pipe hanger can not be automatically unlocked due to vibration or bottom hole pressure.
5. And a perfect test injection channel is arranged, so that after the tubing hanger is placed in place, various sealing tests are carried out to ensure the safety in the production process.
6. The high-integration electrohydraulic crossing panel is arranged, and is matched with the electrohydraulic crossing device, so that the electric signals of a chemical agent injection channel, an underground safety valve control pipeline channel and an underground sensor can be quickly connected, and the recovery of the oil pipe hanger is not influenced after the electrohydraulic crossing device is retracted.
7. The V-shaped upper and lower metal seals of the sealing assembly can bear the high pressure of the production channel stably and reliably, seal the production channel, and ensure that the metal seals can be reliably sealed after being used for multiple times due to certain interference between the inner ring and the outer ring of the metal seals.
Drawings
FIG. 1 is a schematic illustration of the tubing hanger of the present invention installed in a tree;
FIG. 2 is a front view of the tubing hanger body;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is an enlarged view of a portion of FIG. 1 at B;
FIG. 5 is a front view of the tubing hanger; FIG. 6 is a partial view of FIG. 5 at C;
FIG. 7 is a cross-sectional view taken at N-N of FIG. 5;
FIG. 8 is a top view of FIG. 2;
FIG. 9 is a bottom view of FIG. 2;
FIG. 10 is a top view of the tubing hanger;
FIG. 11 is a cross-sectional view taken at F-F in FIG. 10;
FIG. 12 is a cross-sectional view taken at G-G of FIG. 10;
fig. 13 is a cross-sectional view at H-H of fig. 10.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. It will be apparent that the described embodiments are some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific azimuth, be configured and operated in a specific azimuth, and thus should not be construed as limiting the present invention. Moreover, the use of the terms first, second, etc. to define elements is merely for convenience in distinguishing the elements from each other, and the terms are not specifically meant to indicate or imply relative importance unless otherwise indicated.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Referring to fig. 1 to 6, an embodiment of the present invention provides a tubing hanger apparatus for a shallow water subsea tree, comprising a tubing hanger body 2, and an electrohydraulic traverser connection assembly 3, a seat lock assembly 4, a seal assembly 5, a guide assembly 6, and a positioning assembly 7 mounted on the tubing hanger body 2, and a pressurized injection channel system 8.
The sitting and blocking assembly 4 is used for fixing the oil pipe hanger body 2 on the production tree 1; the electrohydraulic traversing device connecting assembly 3 is used for electrohydraulic connection between an external electrohydraulic traversing device (not shown in the figure) and an internal channel of the oil pipe hanger body 2; the sealing assembly 5 comprises a first sealing assembly and a second sealing assembly which are respectively used for sealing the electrohydraulic traversing device connecting assembly 3 and a horizontal channel which is communicated with the tree body of the christmas tree and the tubing hanger body 2; the pressurized injection channel system 8 is used for performing a sealing test; the guide assembly 6 is used for positioning and guiding when the taking tool (not shown in the figure) is connected with the tubing hanger body; the positioning assembly 7 is used for positioning and guiding the tubing hanger 2 when the production tree 1 is set down.
As shown in fig. 5, the guide assembly 6 is fixedly mounted on top of the tubing hanger body 2. The guide assembly 6 comprises a first positioning key 61 fixedly installed on the top of the outer side wall of the tubing hanger body 2, and the first positioning key 61 is matched with a positioning groove formed on the taking tool (not shown in the figure) to realize positioning.
When a taking tool (not shown in the figure) is connected with the tubing hanger body 2, the guiding component 6 is used for positioning and guiding the taking tool (not shown in the figure), so that the joint on the taking tool (not shown in the figure) is accurately butted with the top joint installed on the tubing hanger body 2.
The first positioning key 61 is fixedly mounted on top of the tubing hanger body 2, in particular by means of a set screw 62. The top of the first positioning key 61 is tapered.
Further, the top of the inner side of the tubing hanger body is further provided with left-handed fine threads, a tubing hanger taking tool (not shown in the figure) is connected with the tubing hanger body through the left-handed fine threads, when the taking tool (not shown in the figure) is reversed, locking between the taking tool (not shown in the figure) and the tubing hanger body is achieved, and when the taking tool (not shown in the figure) is rotated in the normal direction, releasing of hands between the taking tool (not shown in the figure) and the tubing hanger body is achieved. The removal tool (not shown) is thus screwed to the tubing hanger, enabling the tubing hanger to be fed and retrieved mechanically.
When a take-off tool (not shown in the figure) lowers the tubing hanger 2 into the tree 1, in order to position and guide the lowered position of the tubing hanger, the positioning assembly 7 comprises a coarse positioning assembly 72 and a precise positioning assembly 71, the coarse positioning assembly 72 being used for coarse positioning between the tubing hanger and the tree 1, and the precise positioning assembly being used for precise positioning between the tubing hanger and the tree 1.
The coarse positioning assembly 72 comprises an orientation bushing 722 and a coarse positioning key 723, wherein the top of the orientation bushing 722 is fixedly connected with the bottom end of the oil pipe hanger 2 in a spiral manner, the coarse positioning key 723 is fixedly arranged at the lower part of the orientation bushing 722, and the bottom of the coarse positioning key 723 is conical.
When the tubing hanger is lowered into the tree 1, the coarse positioning key 723, after contacting the helical guide shoulder of the isolation bushing 40 mounted in the tree 1, forces the entire tubing hanger to rotate until lowered into place, the tubing hanger will be oriented in a fixed direction.
The orientation bushing 722 is preferably fixedly mounted to the bottom of the tubing hanger body 2 using a set screw, and the coarse positioning key 723 is preferably fixed using a set screw 724.
The precision positioning assembly 71 includes a precision positioning key 711 fixedly mounted to the bottom of the tubing hanger body 2. The accurate positioning key 711 is fixed on the tubing hanger body 2 by means of the fixing screw 712, and the accurate positioning key 711 is matched with the rough positioning assembly 72 to ensure accurate positioning after the tubing hanger is lowered.
As shown in connection with fig. 2 and 3, the seat lock assembly 4 includes a seat ring 41, a locking ring 47, and two symmetrically disposed upper shear pins 42. The setting ring 41 is sleeved outside the oil pipe hanger body 2, the outer side wall of the setting ring 41 is conical, the outer diameter of the setting ring 41 gradually decreases from top to bottom, and the top of the setting ring 41 is fixed on the oil pipe hanger body 2 through two upper shearing pins 42. The setting ring 41 is fixed on the tubing hanger body 2 by means of two upper shear pins 42, the upper shear pins 42 preventing the setting ring 41 from moving down by its own weight to excite the locking ring 47 to affect the drop installation of the tubing hanger.
The locking ring 47 cover is established the oil pipe hanger body is external, and is located the below of setting ring 41, the locking ring 47 is for being equipped with open-ended C type structure, the inner wall of locking ring 41 with be formed with between the lateral wall of oil pipe hanger body 2 be used for receiving the annular space of setting ring 41, the inside wall of locking ring 47 is conical, and with the lateral wall phase-match of setting ring 41, four locking teeth 49 have been seted up along axial direction on the lateral wall of locking ring 47, the locking recess with locking tooth matched with is seted up to the inside wall of christmas tree 1. The outer ring of the locking ring 47 is provided with four-tooth locking teeth 49, and the locking ring can lock the tubing hanger in the tree body of the Christmas tree 1 after being excited.
When the tubing hanger is set in place in the christmas tree 1 and locking is required, a tubing hanger take-off tool (not shown) cuts off the two upper shear pins 42, moves the setting ring 41 downward, inserts into the annular space 48 as the setting ring 41 moves downward, continuously expands the diameter of the locking ring 47, presses the locking teeth 49 on the locking ring 47 outwards, and the locking teeth 49 on the locking ring are attached to the upper inclined surfaces of the locking grooves in the christmas tree, thereby realizing locking.
When the tubing hanger needs to be unlocked, the tubing hanger taking tool (not shown in the figure) is used for lifting the setting ring 41, the setting ring 41 moves upwards, the diameter of the locking ring 47 is continuously reduced due to self elasticity, and the unlocking is realized after the setting ring 41 moves upwards in place. In the unlocked state of the tubing hanger, the setting ring 41 is fixed on the tubing hanger body 2 by means of two upper shear pins 42, the upper shear pins 42 preventing the setting ring 47 from moving down due to its own weight to excite the locking ring 47 to affect the drop-in installation of the tubing hanger.
Each upper shear pin 42 is preferably fixedly connected with the tubing hanger body 2 by a screw, an upper shear pin threaded hole 202 is formed in the top of the tubing hanger body 2, and the screw is inserted into the upper shear pin threaded hole 202 to form a fixed connection.
Still further, in order to stably move down and lock the setting ring 41 along the circumferential direction, the setting locking assembly 4 further includes a plurality of guide screws 43, a plurality of setting ring guide grooves 203 corresponding to the guide screws 43 one by one are formed on the outer sidewall of the tubing hanger body 2 along the circumferential direction, one end of the guide screw 43 is fixed on the setting ring 41, and the other end is inserted into the corresponding setting ring guide groove 203 along the horizontal direction.
After the upper shear pin 42 is cut off by a take-off tool (not shown), the setting ring 41 is moved down along the setting ring guide groove 43 on the tubing hanger body 2 until it is inserted into the annular space 48, and the locking ring 47 is pressed outward, so that the locking teeth 49 on the locking ring 47 are fitted with the upper inclined surfaces of the locking grooves in the tree 1, thereby achieving locking. The guide screw 43 is fixed in the setting ring guide groove 203 of the setting ring 41, which penetrates into the tubing hanger body 2, and can also be used for preventing the setting ring 41 from rotating and preventing the setting ring 41 from falling out from the upper part of the tubing hanger body 2.
Furthermore, in order to enable the tubing hanger to be more reliably and stably located in the christmas tree 1, the tubing hanger is not automatically unlocked due to vibration or bottom hole pressure. The seat locking and fastening assembly 4 further comprises a plurality of lower shear pin housings 44, a plurality of lower shear pins 45 and lower shear pin springs 46, wherein the lower shear pins 45 are installed in the lower shear pin housings 44 and are in one-to-one correspondence with the lower shear pin housings 46. The inner side wall of the bottom of the setting ring 41 is provided with a plurality of grooves corresponding to the lower shear pins 45 one by one, the outer side wall of the tubing hanger body 2 is provided with at least one shell threaded hole 204 corresponding to the lower shear pin shells 44 one by one, the lower shear pin shells 46 are fixed in the corresponding shell threaded holes 204, one end of the spring 46 is fixed at the bottom of the lower shear pin shell 44, and the other end is fixedly connected with the corresponding lower shear pins 45.
When the tubing hanger is in the unlocked state, the lower shear pin 45 extends out of the lower shear pin housing threaded bore 204; when the tubing hanger is in the locked condition, the lower shear pins 45 are inserted into the corresponding grooves.
When the tubing hanger is set in place in the tree 1 and locking is required, a tubing hanger take-off tool (not shown) moves the setting ring 41 downward, cuts off the two upper shear pins 42, and the setting ring 41 moves downward to expand the diameter of the locking ring 47. After the setting ring 41 moves down to the right position, the lower shearing pin 45 is clamped into the groove inside the setting ring 41, and the locking teeth 49 of the locking ring 47 are attached to the upper inclined surface of the locking groove in the christmas tree 1, so that locking is realized. When the tubing hanger needs to be unlocked, the tubing hanger taking tool (not shown in the figure) lifts up the setting ring 41, cuts off the plurality of lower upper shearing pins 42, and when the setting ring 41 moves up, the diameter of the locking ring 47 is continuously reduced due to self elasticity, and after the setting ring 41 moves up in place, unlocking is realized.
The electrohydraulic traverser connecting assembly 3 comprises a mounting panel 30, and a blanking plug pressure test joint 32, a downhole safety valve control pipeline horizontal joint 33, two electrohydraulic traverser guide bushings 34, a horizontal electric joint 36 and a downhole chemical injection horizontal joint 31 which are mounted on the mounting panel 30, wherein the mounting panel is mounted on the tubing hanger body 2. The two guide bushings 34 are fixed to the mounting panel 30 by fixing screws 35 to prevent the guide bushings from coming out. After the tubing hanger is placed in place in the tree body 1, an electrohydraulic traversing device (not shown in the figure) is pushed forward, and the electrohydraulic traversing device (not shown in the figure) is accurately butted with a blanking plug pressure test joint 33, an underground chemical agent injection joint 31, an underground safety valve control pipeline joint 33 and a horizontal electric joint 36 which are arranged on the tubing hanger by means of two guide bushings 34.
The sealing assembly 5 comprises a first sealing assembly and a second sealing assembly, which are respectively used for sealing the electrohydraulic traversing device connecting assembly 3 and a horizontal channel penetrating through the tubing hanger body 2 and the tree body.
The first sealing assembly comprises three upper standby S-shaped sealing rings, a plurality of annular sealing grooves 205 which are in one-to-one correspondence with the upper standby S-shaped sealing rings are formed in the outer side wall of the oil pipe hanger body 2, the S-shaped sealing rings are pressed in the corresponding annular sealing grooves 205, two upper standby S-shaped sealing rings are located at the lower end of the electrohydraulic traversing device connecting assembly 3, the other upper standby S-shaped sealing ring is located at the upper end of the electrohydraulic traversing device connecting assembly 3, and the three upper standby S-shaped sealing rings are used for sealing the electrohydraulic traversing device connecting assembly 3.
The second seal assembly is positioned below the first seal assembly for sealing the horizontal channel 218. The second sealing assembly comprises an upper metal sealing ring 51, a metal sealing bush 52, a lower metal sealing ring 53 and a sealing locking device 54, wherein the sealing locking device is positioned below the lower metal sealing ring 53 and used for locking the upper metal sealing ring 51, the lower metal sealing ring 53 and the metal sealing bush 52; the upper metal sealing ring 51 and the lower metal sealing ring 53 are both installed at the position of the metal sealing overlaying layer of the oil pipe hanger body, the metal sealing bush 52 is located between the upper metal sealing ring 51 and the lower metal sealing ring 53, the metal sealing bush 52 is an annular sealing bush, the metal sealing bush 52 is sleeved outside the oil pipe hanger body, the upper end and the lower end respectively prop against the upper metal sealing ring 51 and the lower metal sealing ring 53, and a circular through hole concentric with the horizontal production channel 218 is further formed in the side wall of the metal sealing bush 52.
Preferably, the cross sections of the upper metal seal ring 51 and the lower metal seal ring 53 are V-shaped, the openings of the upper metal seal ring 51 and the lower metal seal ring 53 are opposite, and the upper and lower ends of the metal seal bushing 52 are respectively inserted into the openings of the upper metal seal ring 51 and the lower metal seal ring 53 and are used for supporting the upper metal seal ring 51 and the lower metal seal ring 53. The cross sections of the upper metal seal 51 and the lower metal seal 53 are V-shaped, and the inner ring and the outer ring have certain interference, so that the inner ring and the outer ring in the radial direction can be sealed, and the sealing of high-pressure produced liquid (gas) can be borne in the axial forward direction.
Further, the metal seal bushing 52 is fixed to the outer sidewall of the tubing hanger body 2 by screws (not shown) to prevent rotation.
The sealing and locking device comprises a metal sealing and retaining ring 54 fixedly sleeved on the outer wall of the oil pipe hanger body 2, wherein the metal sealing and retaining ring 54 is positioned below the lower metal sealing ring 53 and used for locking the upper metal sealing ring 51, the lower metal sealing ring 53 and the metal sealing bush 52. The outer side wall of the tubing hanger body 2 is provided with external threads 208, and the metal seal retaining ring 54 is sleeved on the external threads to form fixed connection.
The second seal assembly further comprises a lower backup seal assembly comprising a separating ring 55, a first lower backup S-ring 59, an S-ring retainer ring 56, a second lower backup S-ring 57 and a bottom retainer ring 58 which are sleeved on the tubing hanger body 2; the separating ring 55 is located below the metal sealing retaining ring 56, an outer circle is formed at the top of the inner side wall of the S-shaped sealing retaining ring 56, and the first lower standby S-shaped sealing ring 59 is located below the separating ring 55 and is pressed into a sealing ring groove formed in the outer side wall of the tubing hanger body 2; the top of the S-shaped sealing ring retaining ring 56 is sleeved on the outer circle of the separating ring 55 and is used for preventing the separating ring 55 from falling off; the outer wall of the S-shaped seal ring holding ring 56 is provided with a seal ring groove, and the second lower standby S-shaped seal ring 57 is pressed in the seal ring groove and can be used as a standby seal when the lower metal seal 53 fails. The bottom retainer ring 58 is mounted below the S-ring retainer ring 56 for securing the S-ring retainer ring 56. The separating ring 56 is two semicircular rings and is installed in a separating ring groove 209, and the separating ring groove 209 is formed on the outer side wall of the tubing hanger body 2.
It should be noted that the three upper backup S-rings may be used not only to seal the annular space at the electrohydraulic penetrator panel 30, but also as backup seals after failure of the upper metal seal ring 51.
As shown in fig. 7 to 13, the pressurized injection channel system 8 includes an upper metal seal leakage monitoring system, a lower metal seal leakage monitoring system, a tool connection seal test system, a blanking plug seal test system, a chemical agent injection system, a downhole safety valve control pipeline system, an electrical signal connection system, and the like.
As shown in fig. 11, the upper metal seal leakage monitoring system is used for monitoring the seal leakage condition of the upper metal seal ring 51. The upper metal seal leakage monitoring system comprises an upper metal seal leakage monitoring channel 814 and an upper metal seal leakage monitoring joint 807 which are arranged on the side wall of the oil pipe hanger body 2, wherein the top of the upper metal seal leakage monitoring channel 814 is connected with the upper metal seal leakage monitoring joint 807, the bottom of the upper metal seal leakage monitoring channel is positioned above the upper metal seal ring 51, an upper metal seal leakage threaded hole 212 is formed in the top end of the oil pipe hanger body 2, and the upper metal seal leakage monitoring joint 807 is in spiral connection with the upper metal seal leakage threaded hole 212.
Upper metal seal leakage monitoring joint 807 forms an upper metal seal leakage monitoring system with upper metal seal leakage monitoring channel 814 through which leakage can be observed if upper metal seal 51 leaks.
As shown in fig. 13, the pressurized injection channel system 8 further includes a lower metal seal leakage monitoring system for monitoring the leakage of the lower metal seal, where the lower metal seal leakage monitoring system includes a lower metal seal leakage monitoring channel 815 and a lower metal seal leakage monitoring joint 813 provided on the tubing hanger body 2, the top of the lower metal seal leakage monitoring channel 815 is connected with the lower metal seal leakage monitoring joint 813, the bottom is located below the lower metal seal 53, a lower metal seal leakage threaded hole 213 is provided at the top of the tubing hanger body 2, and the lower metal seal leakage monitoring joint 813 is in screwed connection with the lower metal seal leakage threaded hole 213.
Lower metal seal leakage monitoring joint 813 and the lower metal seal leakage monitoring channel form a lower metal seal leakage monitoring system through which leakage can be observed if lower metal seal 53 leaks.
As shown in fig. 7, the pressurized injection channel system 8 further includes a connection seal test system for performing a seal test at a connection between the measurement and delivery tool (not shown in the drawing) and the tubing hanger, the connection seal detection system includes a top plug 801, a connection seal test channel 816 provided on a sidewall of the tubing hanger body 2, and a horizontal plug 803, and the top and bottom of the connection seal channel 816 are plugged by the top plug 801 and the bottom plug 803, respectively. The top of the tubing hanger body 2 is provided with a connection sealing test threaded hole 211, and the top plug 801 is in spiral connection with the connection sealing test threaded hole 211.
After the tubing hanger taking tool (not shown in the figure) is connected with the tubing hanger body 2, the connection seal is tested by detaching the horizontal plug 803 and pressing in, and the horizontal plug 803 is installed after the test is completed.
Two stoppers are installed in the oil pipe hanger body 2, and the upper and lower stoppers in the oil pipe hanger body can be tested by pressing through a stopper pressure test connector on the electrohydraulic traversing device assembly.
As shown in fig. 12, the pressurized injection channel system 8 further includes a chemical injection system, the chemical injection system includes a downhole chemical injection horizontal joint 31, a bottom injection joint 809 and an injection channel 804 mounted on the electrohydraulic connector assembly, two ends of the injection channel 804 are respectively connected with the horizontal joint 31 and the bottom injection joint 809, the bottom injection joint 809 is disposed at the bottom end of the tubing hanger body 2, a chemical injection joint bottom threaded hole 215 is formed at the bottom end of the tubing hanger body 2, and the bottom injection joint 809 is in screw connection with the chemical injection joint bottom threaded hole 215.
The pressurized injection channel system further comprises an underground safety valve control pipeline system for controlling an underground safety valve, wherein the underground safety valve control pipeline system comprises a safety valve control pipeline horizontal joint 33, a safety valve control pipeline top joint 810, a safety valve control pipeline bottom joint 812 and a safety valve control pipeline channel connected with the bottom joint 812, the top joint 810 and the horizontal joint 33, the safety valve control pipeline top joint 810 is arranged at the top end of the oil pipe hanger body 2, and the safety valve control pipeline bottom joint 812 is arranged at the bottom end of the oil pipe hanger body 2.
The bottom end of the tubing hanger body 2 is provided with a threaded hole 217 of the bottom joint of the underground safety valve control pipeline, and the bottom joint 812 of the safety valve control pipeline is in screw connection with the threaded hole 217 of the bottom joint of the underground safety valve control pipeline. The top end of the tubing hanger body 2 is provided with a threaded hole 214 of a top joint of the underground safety valve control pipeline, and the bottom joint 810 of the safety valve control pipeline is in screw connection with the threaded hole 214 of the bottom joint of the underground safety valve control pipeline.
The underground safety valve can be controlled by controlling the pressure of the pipeline horizontal joint through the safety valve.
The electrical connection system comprises a horizontal electrical connector 36 of the electrohydraulic crossing connection assembly 3, a field connectable wet electrical connector test plug 805 and a field connectable wet electrical connector 806, wherein the field connectable wet electrical connector 806 is used for connecting an electrohydraulic crossing device with an underground pressure gauge electrical signal, and sealing performance of the connection part is tested by pressure after the electrical connector test plug 805 is removed. The bottom of the tubing hanger body 2 is provided with a field connectable wet electric connector bottom threaded hole 216, and the field connectable wet electric connector 806 is in screw connection with the bottom threaded hole 216.
The oil pipe hanger device for the shallow water underwater Christmas tree can be simply and quickly put in and recovered in a mechanical mode.
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 (14)
1. An oil pipe hanger device for a shallow water underwater christmas tree is characterized by comprising an oil pipe hanger body, an electrohydraulic traversing device connecting assembly, a sitting and blocking assembly, a sealing assembly, a pressing injection channel system, a taking tool guiding assembly and a positioning assembly, wherein the electrohydraulic traversing device connecting assembly, the sitting and blocking assembly, the sealing assembly, the pressing injection channel system and the positioning assembly are arranged on the oil pipe hanger body;
the electrohydraulic traversing device connecting assembly is used for electrohydraulic connection between the external electrohydraulic traversing device and the internal channel of the oil pipe hanger body;
The sitting locking assembly is used for fixing the oil pipe hanger body on the production tree;
the sealing assembly comprises a first sealing assembly and a second sealing assembly, the first sealing assembly is used for sealing the electrohydraulic traversing device connecting assembly, and the second sealing assembly is used for sealing a horizontal channel which is communicated with the tree body of the christmas tree and the tubing hanger body;
the pressurizing injection channel system is used for performing a sealing test;
the delivery tool guide assembly is used for positioning and guiding the delivery tool when the delivery tool is connected with the oil pipe hanger body;
the positioning assembly is used for positioning and guiding the oil pipe hanger body when the oil pipe hanger body is placed in the production tree;
the electrohydraulic traversing device connecting assembly comprises a mounting panel, a blanking plug pressure testing joint, an underground safety valve control pipeline horizontal joint, two electrohydraulic traversing device guide bushings, a horizontal electric joint and an underground chemical agent injection horizontal joint which are arranged on the mounting panel, the mounting panel is arranged on the oil pipe hanger body,
after the oil pipe hanger is placed in place in the tree body of the christmas tree, the electro-hydraulic traversing device is pushed forward and accurately butted by virtue of the two guide bushings, so that the electro-hydraulic traversing device is communicated with a blanking plug pressure test connector, an underground chemical agent injection connector, an underground safety valve control pipeline connector and a horizontal electric connector which are arranged on the oil pipe hanger;
The second sealing assembly comprises an upper metal sealing ring, a metal sealing bush, a lower metal sealing ring and a sealing locking device, wherein the sealing locking device is positioned below the lower metal sealing ring and used for locking the upper metal sealing ring, the lower metal sealing ring and the metal sealing bush; the upper metal sealing ring and the lower metal sealing ring are both arranged at the position of a metal sealing overlaying layer of the oil pipe hanger body, the metal sealing bush is positioned between the upper metal sealing ring and the lower metal sealing ring, the metal sealing bush is an annular sealing bush, the upper end and the lower end of the metal sealing bush respectively prop against the upper metal sealing ring and the lower metal sealing ring, and a circular through hole concentric with a horizontal production channel is also formed in the side wall of the metal sealing bush;
the sealing locking device comprises a metal sealing retaining ring fixedly sleeved on the outer wall of the oil pipe hanger body, and the metal sealing retaining ring is positioned below the lower metal sealing ring and used for locking the upper metal sealing ring, the lower metal sealing ring and the metal sealing bushing;
the second sealing assembly further comprises a standby sealing assembly, wherein the standby sealing assembly comprises a separating ring sleeved on the oil pipe hanger body, a first lower standby S-shaped sealing ring, an S-shaped sealing ring retaining ring, a second lower standby S-shaped sealing ring and a bottom retaining ring; the separation ring is positioned below the metal sealing retaining ring, the first lower standby S-shaped sealing ring is positioned below the separation ring and is pressed in a sealing ring groove formed in the outer side wall of the oil pipe hanger body, the S-shaped sealing ring retaining ring is sleeved outside the first lower standby S-shaped sealing ring, and the top of the S-shaped sealing ring retaining ring is sleeved on the outer circle of the separation ring; the second lower standby S-shaped sealing ring is fixedly sleeved on the outer wall of the S-shaped sealing ring retaining ring, and the bottom retaining ring is arranged below the S-shaped sealing ring retaining ring and used for fastening the S-shaped sealing ring retaining ring;
The pressurizing injection channel system comprises an upper metal seal leakage monitoring system, a lower metal seal leakage monitoring system, a taking tool connection seal testing system, a blanking plug seal testing system, a chemical agent injection system, an underground safety valve control pipeline system and an electric signal connecting system.
2. The tubing hanger apparatus for a shallow water subsea tree of claim 1, wherein the setting lock assembly comprises a setting ring, at least one upper shear pin, and a locking ring;
the oil pipe hanger body is sleeved with the setting ring, the outer side wall of the setting ring is conical, the outer diameter of the setting ring is gradually reduced from top to bottom, and the top of the setting ring is fixed on the oil pipe hanger body through the upper shearing pin;
the locking ring is sleeved outside the oil pipe hanger body, the locking ring is located below the setting ring, the locking ring is of a C-shaped structure with an opening, an annular space for receiving the setting ring is formed between the inner side wall of the locking ring and the outer side wall of the oil pipe hanger body, the inner side wall of the locking ring is conical and matched with the outer side wall of the setting ring, and at least one locking tooth is formed on the outer side wall of the locking ring along the axial direction.
3. The tubing hanger apparatus for shallow water subsea tree according to claim 2, wherein said setting lock assembly further comprises at least one guide screw having at least one setting ring guide groove formed in an outer sidewall of said tubing hanger body in a one-to-one correspondence with said guide screw along a circumferential direction, one end of said guide screw being fixed to said setting ring, and the other end being inserted into the corresponding setting ring guide groove along a horizontal direction.
4. A tubing hanger apparatus for a shallow water subsea tree according to claim 3, wherein,
the sitting and locking assembly further comprises at least one lower shear pin shell, at least one lower shear pin and a lower shear pin spring, wherein the lower shear pin is installed in the lower shear pin shell and corresponds to the lower shear pin shell one by one;
the inner side wall of the bottom of the setting ring is provided with at least one groove corresponding to the lower shearing pin one by one, the outer side wall of the oil pipe hanger body is also provided with at least one threaded hole corresponding to the lower shearing pin shell one by one, the lower shearing pin shell is fixed in the corresponding threaded hole, one end of the spring is fixed at the bottom of the lower shearing pin shell, and the other end of the spring is fixedly connected with the lower shearing pin;
When the tubing hanger is in an unlocking state, the lower shear pin extends out of the threaded hole; when the tubing hanger is in a locked state, the lower shear pins are inserted into the corresponding grooves.
5. The oil pipe hanger device for shallow water subsea tree according to claim 1, wherein the first sealing assembly comprises at least two upper standby S-shaped sealing rings, a plurality of annular sealing grooves corresponding to the upper standby S-shaped sealing rings one by one are formed in the outer side wall of the oil pipe hanger body, the S-shaped sealing rings are pressed in the corresponding annular sealing grooves, and the two upper standby S-shaped sealing rings are respectively located at the upper end and the lower end of the electrohydraulic traversing device panel.
6. The tubing hanger apparatus for shallow water subsea trees of claim 5, wherein said upper backup S-ring seal comprises three, one above said electrohydraulic traverser connection assembly and two below said electrohydraulic traverser connection assembly.
7. The tubing hanger apparatus for a shallow water subsea tree according to claim 1, wherein said pick-up tool guide assembly comprises a pick-up tool locating key fixedly mounted on top of an outer sidewall of said tubing hanger body, said pick-up tool locating key cooperating with a locating recess provided on said pick-up tool to effect locating.
8. The tubing hanger apparatus for a shallow water subsea tree of claim 1, wherein the positioning assembly comprises a coarse positioning assembly for coarse positioning between the tubing hanger and the tree and a fine positioning assembly for fine positioning between the tubing hanger and the tree.
9. The tubing hanger apparatus for a shallow water subsea tree of claim 8, wherein the coarse positioning assembly comprises a directional liner and a coarse positioning key, the top of the directional liner being fixedly connected to the bottom end of the tubing hanger body, the coarse positioning key being fixedly mounted to the lower portion of the directional liner.
10. The tubing hanger apparatus for a shallow water subsea tree of claim 8, wherein the precision positioning assembly comprises a precision positioning key fixedly mounted at a bottom of the tubing hanger body.
11. The tubing hanger apparatus for a shallow water subsea tree of claim 1, wherein said pressurized injection channel system comprises an upper metal seal leakage monitoring system for monitoring leakage of said upper metal seal ring, said upper metal seal leakage monitoring system comprising an upper metal seal leakage monitoring channel provided on a sidewall of said tubing hanger body, an upper metal seal leakage threaded hole provided at a top of said tubing hanger body, and an upper metal seal leakage monitoring nipple in threaded connection with said upper metal seal leakage threaded hole, said upper metal seal leakage monitoring channel having a top in communication with said upper metal seal leakage monitoring nipple and a bottom above said upper metal seal ring.
12. The tubing hanger apparatus for a shallow water subsea tree of claim 1, wherein the pressurized injection channel system further comprises a lower metal seal leakage monitoring system for monitoring leakage of the lower metal seal, the lower metal seal leakage monitoring system comprising a lower metal seal leakage monitoring channel provided on the tubing hanger body, a lower metal seal leakage threaded hole provided at the top of the tubing hanger body, and a lower metal seal leakage monitoring joint in threaded connection with the lower metal seal leakage threaded hole, the top of the lower metal seal leakage monitoring channel being in communication with the lower metal seal leakage monitoring joint, the bottom being located below the lower metal seal ring.
13. The tubing hanger apparatus for a shallow water subsea tree according to claim 1, wherein the pressurized injection channel system further comprises a connection seal test system for performing a seal test at a junction between the take-off tool and the tubing hanger body, the connection seal test system comprising a top plug, a connection seal test channel formed in a sidewall of the tubing hanger body, and a horizontal plug, the top and bottom of the connection seal channel being plugged by the top plug and the bottom plug, respectively, and connection seal test threaded holes being formed in both the top and sidewall of the tubing hanger body, the connection seal test system top plug, the horizontal plug being in threaded connection with the connection seal test threaded holes.
14. The tubing hanger apparatus for shallow water subsea tree according to claim 1, wherein the top of the inside of the tubing hanger body is further provided with left hand fine tooth threads through which the take-off tool is threadably connected to the tubing hanger body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111117981.4A CN113756737B (en) | 2021-09-22 | 2021-09-22 | Oil pipe hanger device for shallow water underwater Christmas tree |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111117981.4A CN113756737B (en) | 2021-09-22 | 2021-09-22 | Oil pipe hanger device for shallow water underwater Christmas tree |
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| CN113756737A CN113756737A (en) | 2021-12-07 |
| CN113756737B true CN113756737B (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111117981.4A Active CN113756737B (en) | 2021-09-22 | 2021-09-22 | Oil pipe hanger device for shallow water underwater Christmas tree |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114737903A (en) * | 2022-06-14 | 2022-07-12 | 中海石油(中国)有限公司 | Hydraulic oil pipe hanger for shallow underwater Christmas tree and matching device thereof |
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