CN212774211U - Subsea tree well head connector suitable for within 50 meters of water depth - Google Patents
Subsea tree well head connector suitable for within 50 meters of water depth Download PDFInfo
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- CN212774211U CN212774211U CN202021249018.2U CN202021249018U CN212774211U CN 212774211 U CN212774211 U CN 212774211U CN 202021249018 U CN202021249018 U CN 202021249018U CN 212774211 U CN212774211 U CN 212774211U
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- bearing sleeve
- upper piston
- wellhead
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Abstract
The utility model discloses an underwater Christmas tree well head connector suitable for water depth within 50 meters, which comprises an inner body, a bearing sleeve, a C-shaped locking ring, an upper piston and a pushing and locking device; the inner body is sleeved outside the wellhead head and arranged inside the bearing sleeve, the top of the bearing sleeve is fixedly connected with the lower end face of the Christmas tree, the bottom of the bearing sleeve is fixedly connected with the step face of the inner body, and a cavity is formed among the wellhead head, the inner body, the bearing sleeve and the lower end face of the Christmas tree; the C-shaped locking ring is arranged at the top of the inner body and sleeved outside the wellhead head; the upper piston is arranged between the inner body and the bearing sleeve and divides the cavity into an upper hydraulic cavity and a lower piston cavity; the pushing locking device is fixedly connected to the top of the upper piston and can move downwards to press the C-shaped locking ring or move upwards to loosen the C-shaped locking ring under the action of hydraulic oil. The utility model discloses simple structure, the reliability is high, easily installs, has positive meaning to guaranteeing production tree and well head junction operational reliability.
Description
Technical Field
The utility model relates to a connected mode of well head and production tree in the production tree device installation under water, in particular to production tree well head connector under water who is applicable to within 50 meters depth of water.
Background
The wellhead connector of the underwater Christmas tree is an important part of the Christmas tree, is mainly clamped on a high-pressure wellhead head through a locking block, and has the functions of connecting the wellhead and the Christmas tree body, preventing high-temperature and high-pressure oil gas in the well from leaking, supporting a metal sealing ring and bearing internal and external loads.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming not enough among the prior art, providing a be applicable to the subsea tree well head connector within 50 meters depth of water, having simple structure, the reliability is high, and advantages such as easily installation have positive meaning to ensureing christmas tree and well head junction operational reliability.
The utility model adopts the technical proposal that: a subsea tree wellhead connector adapted for use within a water depth of 50 meters, the wellhead connector comprising:
the inner body is sleeved outside the wellhead head, and a step surface is arranged on the outer ring of the bottom of the inner body;
the bearing sleeve is of a hollow structure, the inner body is arranged in the bearing sleeve and is positioned at the lower part of the bearing sleeve, the top of the bearing sleeve is fixedly connected with the lower end face of the Christmas tree, the bottom of the bearing sleeve is fixedly connected with the step face of the inner body, and a cavity is formed among the wellhead head, the inner body, the bearing sleeve and the lower end face of the Christmas tree;
the C-shaped locking ring is arranged at the top of the inner body and sleeved outside the wellhead head;
the upper piston is arranged between the inner body and the bearing sleeve, the inner wall of the upper piston is in sealing connection with the outer wall of the inner body, the outer wall of the upper piston is in sealing connection with the inner wall of the bearing sleeve, the cavity is divided into a hydraulic cavity at the upper part and a piston cavity at the lower part, and the upper piston can move up and down under the action of hydraulic oil; and the number of the first and second groups,
and the pushing locking device is fixedly connected to the top of the upper piston and can move downwards to press the C-shaped locking ring or move upwards to loosen the C-shaped locking ring under the action of hydraulic oil.
Furthermore, a third-order step surface is arranged on the outer ring of the bottom of the inner body, wherein the third-order step surface is positioned below the bottom of the bearing sleeve and is fixedly connected with the bottom of the bearing sleeve through a screw; the second step surface is provided with a bottom plug matched with the upper piston, the top surface of the bottom plug is not higher than the first step surface, the inner wall of the bottom plug is in sealing connection with the outer wall of the inner body, and the outer wall of the bottom plug is in sealing connection with the inner wall of the bearing sleeve.
Furthermore, the upper part and the lower part of the inner body are both provided with a bell mouth, the bottom of the bell mouth positioned on the upper part is provided with a groove, and the C-shaped locking ring is arranged in the groove and is guided by the bell mouth positioned on the upper part.
Furthermore, the top of the inner body is provided with an anti-deviation rod, and the push locking device is sleeved on the anti-deviation rod.
Furthermore, the inner wall of the C-shaped locking ring is provided with a concave-convex structure matched with a concave-convex groove on the outer wall of the wellhead.
Further, the contact surface of the upper piston and the pushing and locking device is locked through threaded connection.
Furthermore, the bottom of the upper piston is provided with a boss for limiting the upper piston during locking to prevent the upper piston from extruding the bottom plug downwards, and a space is reserved for the piston cavity during unlocking.
Further, the wellhead connector also comprises a position indication rod which is fixedly connected to the top of the push locking device.
Further, the wellhead connector also comprises a VX sealing steel ring which is arranged at the top of the wellhead head.
Further, the wellhead connector further comprises rubber sealing rings, and the rubber sealing rings are arranged between the inner wall of the upper piston and the outer wall of the inner body, between the outer wall of the upper piston and the inner wall of the bearing sleeve, between the inner wall of the bottom plug and the outer wall of the inner body, between the outer wall of the bottom plug and the inner wall of the bearing sleeve, and between the outer wall of the inner body and the inner wall of the bearing sleeve.
The utility model has the advantages that:
1. in the utility model, the structure of the pushing locking device is simplified, the upper piston and the position indicating rod are integrated without affecting the position indication, and the connection reliability is higher;
2. in the utility model, the upper groove bell mouth of the inner body is more beneficial to the positioning and clamping of the C-shaped locking ring when being installed;
3. in the utility model, the upper piston and the pushing locking device are connected by screw thread to ensure that a larger friction force is generated between the upper piston and the pushing locking device, and a better mechanical force conduction effect is generated during locking;
4. in the utility model, the anti-deviation rod is beneficial to the installation of the upper piston and the positioning when the locking device is pushed;
6. the utility model discloses in, the bottom boss of upper portion piston can be when locking spacing upper portion piston, thereby prevent that the stopper is stopped in the bottom of the downward extrusion of upper portion piston from protecting to give piston chamber headspace when the unblock.
Drawings
FIG. 1: the utility model has a schematic structure;
FIG. 2: the schematic diagram at a is enlarged in fig. 1.
The attached drawings are marked as follows:
1-inner body; 6-position indicating rod; 11-piston cavity;
2-bottom plug; 7-C type locking ring; 12-VX sealing steel ring;
3-upper piston; 8-hydraulic chamber; 13-well head;
4-pushing the locking device; 9-bearing sleeve; 14-Christmas tree lower end face.
5-deviation preventing rod; 10-rubber seal ring;
Detailed Description
For further understanding of the contents, features and effects of the present invention, the following embodiments are exemplified and will be described in detail with reference to the accompanying drawings:
as shown in the attached figure 1, the wellhead connector of the underwater Christmas tree suitable for the water depth of 50 meters comprises an inner body 1, a bottom plug 2, an upper piston 3, a pushing locking device 4, an anti-deviation rod 5, a position indicating rod 6, a C-shaped locking ring 7, a bearing sleeve 9, a rubber sealing ring 10 and a VX sealing steel ring 12.
The inner body 1 is sleeved outside the wellhead head 13, and the outer ring of the bottom of the inner body 1 is provided with a third-step surface, wherein the third-step surface is positioned below the bottom of the bearing sleeve 9 and is fixedly connected with the bottom of the bearing sleeve 9 through a screw; the bottom plug 2 is arranged on the second step surface, the top surface of the bottom plug 2 is not higher than the first step surface, the inner wall of the bottom plug 2 is in sealing connection with the outer wall of the inner body 1, and the outer wall of the bottom plug 2 is in sealing connection with the inner wall of the bearing sleeve 9. The upper part and the lower part of the inner body 1 are both provided with bell mouths, and the bottom of the bell mouth positioned at the upper part is provided with a groove for installing the C-shaped locking ring 7. The top of the inner body 1 is in threaded connection with the anti-deviation rod 5.
The bearing sleeve 9 is of a hollow cylindrical structure, the inner body 1 is arranged in the bearing sleeve 9 and is positioned at the lower part of the bearing sleeve 9, the inner wall of the bottom of the bearing sleeve 9 is attached to the side wall of the second-step surface of the inner body 1, the top of the bearing sleeve 9 is fixedly connected with the lower end surface 14 of the Christmas tree through screws, the bottom of the bearing sleeve 9 is fixedly connected with the third-step surface of the inner body 1 through screws, and a cavity is formed among the wellhead head 13, the inner body 1, the bearing sleeve 9 and the lower end surface 14 of the Christmas tree.
The locking ring (7) is installed in a groove formed at the top of the inner body (1), and when installed, if the locking ring (7) is not completely aligned with the groove, the locking ring (7) can be slid to a predetermined position through the bell mouth formed at the upper portion. The C-shaped locking ring 7 is sleeved outside the well head 13, the inner wall of the C-shaped locking ring is provided with a concave-convex structure matched with a concave-convex groove on the outer wall of the well head 13, and the C-shaped locking ring contracts in the circumferential direction and is attached to the well head 13 during locking.
The upper piston 3 is arranged between the inner body 1 and the bearing sleeve 9, the inner wall of the upper piston 3 is hermetically connected with the outer wall of the inner body 1, the outer wall of the upper piston 3 is hermetically connected with the inner wall of the bearing sleeve 9, the chamber is divided into a hydraulic cavity 8 located at the upper part and a piston cavity 11 located at the lower part, and hydraulic oil can be injected into the hydraulic cavity 8 through a hydraulic pipeline to enable the upper piston 3 to move downwards and hydraulic oil can be injected into the piston cavity 11 through a hydraulic pipeline to enable the upper piston 3 to move upwards. The bottom of the upper piston 3 is provided with a boss, the boss and the first-step surface of the inner body 1 are oppositely arranged, and the boss is used for limiting the upper piston 3 during locking, preventing the upper piston 3 from downwards extruding the bottom plug 2 and reserving space for the piston cavity 11 during unlocking.
The pushing locking device 4 is fixedly connected to the top of the upper piston 3 and sleeved on the deviation prevention rod 5, and the contact surface of the upper piston 3 and the pushing locking device 4 is connected and locked through threads. The pushing locking device 4 can move downwards to press the C-shaped locking ring 7 or move upwards to loosen the C-shaped locking ring 7 under the action of hydraulic oil.
The position indication rod 6 is fixedly connected to the top of the push locking device 4 and can play a role of pushing the upper piston 3 downwards when in locking.
The VX sealing steel ring 12 is arranged at the top of the wellhead head 13, and the sealing performance between the wellhead connector and the wellhead head 13 is guaranteed.
The rubber sealing rings 10 are arranged between the inner wall of the upper piston 3 and the outer wall of the inner body 1, between the outer wall of the upper piston 3 and the inner wall of the bearing sleeve 9, between the inner wall of the bottom plug 2 and the outer wall of the inner body 1, between the outer wall of the bottom plug 2 and the inner wall of the bearing sleeve 9, and between the outer wall of the inner body 1 and the inner wall of the bearing sleeve 9, so that the sealing performance of the inner body 1 and the bearing sleeve 9 is ensured. In this embodiment, 12 rubber seal rings 10 are provided.
In this embodiment, the inner body 1 is first placed at the bottom of the shore, the bottom plug 2 is provided with the rubber seal ring 10 and then sleeved at the bottom of the inner body 1, the anti-deviation rod 5 is installed on the inner body 1 through threaded connection, the upper part of the inner body 1 is provided with the C-shaped locking ring 7, and the pushing locking device 4 and the upper piston 3 are locked through threaded connection by utilizing the bell mouth groove for clamping, as shown in fig. 2. Installing a rubber sealing ring 10, installing the upper piston 3 and the pushing locking device 4 as a whole in an aligning way to the anti-deviation rod 5 to form sliding connection, installing the inner body 1, installing the bearing sleeve 9 into the inner body 1, connecting the bearing sleeve with the inner body through a screw, and finally taking the VX sealing steel ring 12 as a sealing device, wherein the wellhead connector is connected with a Christmas tree and is placed down together.
When the Christmas tree is required to be locked with a high-pressure wellhead, hydraulic oil can be injected into the hydraulic cavity 8 through the hydraulic pipeline to push the locking device 4 to push the upper piston 3 to move downwards, and the C-shaped locking ring 7 contracts in the annular direction to realize locking of the wellhead connector and the high-pressure wellhead. At the moment, the wellhead connector and the wellhead are sealed by the VX sealing steel ring 12.
When the wellhead connector and the high-pressure wellhead are required to be unlocked or disassembled, the hydraulic oil is injected into the piston cavity 11 to push the upper piston 3 to move upwards, so that the locking device 4 is pushed to move upwards, the C-shaped locking ring 7 is loosened in the annular direction, and the outer body of the Christmas tree is lifted by means of an external machine tool, so that the wellhead connector is separated from the wellhead. Meanwhile, after the external force is removed or locked, when the wellhead connector is subjected to the effects of vibration, external load and the like, the locking device 4 is pushed to be in threaded connection with the upper piston 3, so that the self-locking purpose is achieved.
Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention, which is within the protection scope of the present invention.
Claims (10)
1. A subsea tree wellhead connector adapted for use within a water depth of 50 meters, the wellhead connector comprising:
the inner body (1) is sleeved outside the wellhead head (13), and the outer ring of the bottom of the inner body (1) is provided with a step surface;
the bearing sleeve (9) is of a hollow structure, the inner body (1) is arranged in the bearing sleeve (9) and is positioned at the lower part of the bearing sleeve (9), the top of the bearing sleeve (9) is fixedly connected with the lower end face (14) of the Christmas tree, the bottom of the bearing sleeve (9) is fixedly connected with the step face of the inner body (1), and a cavity is formed among the wellhead head (13), the inner body (1), the bearing sleeve (9) and the lower end face (14) of the Christmas tree;
the C-shaped locking ring (7) is arranged at the top of the inner body (1) and sleeved outside the wellhead head (13);
the upper piston (3) is arranged between the inner body (1) and the bearing sleeve (9), the inner wall of the upper piston (3) is in sealing connection with the outer wall of the inner body (1), the outer wall of the upper piston (3) is in sealing connection with the inner wall of the bearing sleeve (9), the cavity is divided into a hydraulic cavity (8) located at the upper part and a piston cavity (11) located at the lower part, and the upper piston (3) can move up and down under the action of hydraulic oil; and the number of the first and second groups,
and the pushing locking device (4) is fixedly connected to the top of the upper piston (3), and can move downwards to press the C-shaped locking ring (7) or move upwards to loosen the C-shaped locking ring (7) under the action of hydraulic oil.
2. The subsea tree wellhead connector according to claim 1, characterized in that the bottom outer ring of the inner body (1) is provided with a third step surface, wherein the third step surface is located below the bottom of the bearing sleeve (9) and is fixedly connected with the bottom of the bearing sleeve (9) by a screw; the second-step surface is provided with a bottom plug (2) matched with the upper piston (3), the top surface of the bottom plug (2) is not higher than the first-step surface, the inner wall of the bottom plug (2) is in sealing connection with the outer wall of the inner body (1), and the outer wall of the bottom plug (2) is in sealing connection with the inner wall of the bearing sleeve (9).
3. Subsea tree wellhead connector according to claim 1, characterized in that the inner body (1) is provided with a bell mouth both in the upper and in the lower part, the bottom of the bell mouth in the upper part being provided with a groove in which the C-shaped locking ring (7) is mounted and guided by the bell mouth in the upper part.
4. Subsea tree wellhead connector according to claim 1, characterized in that the top of the inner body (1) is provided with an anti-deviation rod (5), the push-on locking device (4) being fitted over the anti-deviation rod (5).
5. Subsea tree wellhead connector according to claim 1, characterized in that the inner wall of the locking ring (7) is provided with a relief cooperating with a relief of the outer wall of the wellhead head (13).
6. Subsea tree wellhead connector according to claim 1, characterized in that the upper piston (3) is locked by a threaded connection with the contact surface of the push locking device (4).
7. Subsea tree wellhead connector according to claim 2, characterized in that the bottom of the upper piston (3) is provided with a boss for limiting the upper piston (3) when locked, preventing the upper piston (3) from pressing the bottom plug (2) downwards, and leaving room for the piston cavity (11) when unlocked.
8. Subsea tree wellhead connector according to claim 1, characterized in that it further comprises a position indicating rod (6), said position indicating rod (6) being fixedly connected on top of the push-lock device (4).
9. The subsea tree wellhead connector of claim 1, characterized in that it further comprises a VX sealing bead (12), the VX sealing bead (12) being disposed on top of the wellhead head (13).
10. Subsea tree wellhead connector according to claim 2, characterized in that it further comprises rubber sealing rings (10), said rubber sealing rings (10) being provided between the inner wall of the upper piston (3) and the outer wall of the inner body (1), between the outer wall of the upper piston (3) and the inner wall of the carrying sleeve (9), between the inner wall of the bottom plug (2) and the outer wall of the inner body (1), between the outer wall of the bottom plug (2) and the inner wall of the carrying sleeve (9), between the outer wall of the inner body (1) and the inner wall of the carrying sleeve (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021249018.2U CN212774211U (en) | 2020-06-30 | 2020-06-30 | Subsea tree well head connector suitable for within 50 meters of water depth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021249018.2U CN212774211U (en) | 2020-06-30 | 2020-06-30 | Subsea tree well head connector suitable for within 50 meters of water depth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212774211U true CN212774211U (en) | 2021-03-23 |
Family
ID=75086266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021249018.2U Active CN212774211U (en) | 2020-06-30 | 2020-06-30 | Subsea tree well head connector suitable for within 50 meters of water depth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212774211U (en) |
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2020
- 2020-06-30 CN CN202021249018.2U patent/CN212774211U/en active Active
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