Wellhead for simulating positioning of Christmas tree

Abstract

The utility model discloses wellhead device of analog production tree positioning, it includes well killing pipeline, production oil nozzle pipeline, wellhead system and positioning device, and positioning device includes first positioning assembly and second positioning assembly at wellhead system both ends, and first positioning assembly includes the lower flange connector no.

Description

Technical Field

[0001] This utility model relates to the field of offshore oilfield development technology, specifically to a wellhead device for simulating the positioning of a wellhead. Background Technology

[0002] In traditional offshore oilfield development, during the process from drilling to production, the connection of wellhead pipelines requires positioning and determination using the flanges on the Christmas tree. This significantly impacts operational efficiency. Furthermore, operators must consider wellhead safety, and it is difficult to adjust the pipeline layout after drilling is completed. Therefore, measures are urgently needed to pre-position and adapt the routes of the Christmas tree and wellhead pipelines.

[0003] Existing methods for simulating wellhead positioning cannot complete the positioning and installation of back-to-wellhead pipelines during drilling and completion operations. To achieve this during this period, the riser pipe must be removed, increasing the risk of wellhead exposure. However, with increasing workloads and for wellhead safety considerations, it is necessary to research an efficient wellhead device for simulating wellhead positioning. This device, by pre-setting the flange positions of the back-to-wellhead pipelines on the wellhead after installation, optimizes the well construction process. This allows for the positioning and installation of kill lines and production nozzles during drilling and completion operations, before the wellhead installation, while meeting the accuracy requirements for subsequent wellhead installation. Utility Model Content

[0004] The purpose of this invention is to provide a wellhead device for simulating the positioning of an oil well tree, so as to solve the problems mentioned in the background art.

[0005] The specific details of the utility model are as follows:

[0006] To solve the above-mentioned technical problems, this utility model provides a wellhead device for simulating the positioning of an oil production tree, including a kill line, a production nozzle line, a wellhead system and a positioning device. The positioning device includes a first positioning component and a second positioning component located on both sides of the wellhead system. The first positioning component includes a lower flange connector 1, a support rod 1 and an upper flange connector 1 connected in sequence. The second positioning component includes a lower flange connector 2, a support rod 2 and an upper flange connector 2 connected in sequence.

[0007] Lower flange connector one and lower flange connector two are detachably connected to two opposite interfaces on the wellhead system;

[0008] Upper flange connector one and upper flange connector two are detachably connected to the kill line and the production nozzle line, respectively;

[0009] The extension directions of support rod one and support rod two are perpendicular to the horizontal plane.

[0010] In some embodiments, the upper flange connector includes a flange connected to the kill line, the flange being directly connected to the end of the support rod, and the plate surface of the flange being parallel to the support rod.

[0011] In some embodiments, the lower flange connector 1, the lower flange connector 2, and the upper flange connector 2 each include a flange fixing member and a flange 2 connected to the end of the flange fixing member.

[0012] In some embodiments, the flange fixing connector and flange two in lower flange connector one and lower flange connector two are arranged vertically.

[0013] In some embodiments, the flange fixing connector in the upper flange connector 2 and the flange 2 are arranged in parallel.

[0014] In some embodiments, the flange fixing connector includes a crossbar that is perpendicular to support rod one or support rod two, and the crossbar is provided with a connecting part for connecting support rod one or support rod two.

[0015] In some embodiments, support rod one and support rod two are straight rods of fixed length.

[0016] In some embodiments, support rod one and support rod two are telescopic rod structures with adjustable length.

[0017] In some embodiments, the telescopic rod structure includes an outer telescopic rod and an inner telescopic rod embedded within the outer telescopic rod, with the outer telescopic rod and the inner telescopic rod slidably connected.

[0018] In some embodiments, the wellhead system is provided with a casing four-way connector. The two opposite interfaces on the wellhead system include casing four-way flange one and casing four-way flange two located at both ends of the casing four-way connector. Both casing four-way flange one and casing four-way flange two are provided with a sealing structure on the side away from the positioning device to open, close or block their corresponding casing four-way connector pipes.

[0019] The following are the beneficial effects of implementing this utility model: This wellhead device for simulating the positioning of the wellhead tree can preset the position of the flange connecting the wellhead pipeline on the wellhead after installation by using the positioning device. This enables the wellhead pipeline positioning and installation to be completed during the drilling and completion operation before the installation of the wellhead tree, and meets the accuracy requirements during the subsequent installation of the wellhead tree, thereby optimizing the oil well construction process. At the same time, the positioning device can be used to conduct low-pressure tests on the production pipeline process and optimize the wellhead pipeline layout process. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the wellhead device for simulating tree positioning in some embodiments;

[0022] Figure 2 A schematic diagram of the first positioning component in a wellhead device for simulating the positioning of an oil production tree;

[0023] Figure 3 A schematic diagram of the second positioning component in a wellhead device for simulating the positioning of an oil production tree;

[0024] Figure 4 This is a schematic diagram of the support rod of the telescopic rod structure. Detailed Implementation

[0025] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model. Furthermore, it should be noted that when a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or position based on the orientation or position shown in the accompanying drawings, and are only for ease of description and should not be construed as limiting the present technical solution. "A plurality" means two or more, unless otherwise explicitly specified.

[0026] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] Please see Figures 1 to 3This is a wellhead device for simulating tree positioning in some embodiments of the present invention. The wellhead device includes a kill line 1, a production nozzle line 2, a wellhead system 3, and a positioning device 4. The positioning device 4 includes a first positioning component 41 and a second positioning component 42 located on both sides of the wellhead system 3. The first positioning component 41 includes a lower flange connector 411, a support rod 412, and an upper flange connector 413 connected in sequence. The second positioning component 42 includes a lower flange connector 421, a support rod 422, and an upper flange connector 423 connected in sequence. The lower flange connector 411 and the lower flange connector 421 are detachably connected to two opposite interfaces on the wellhead system 3. The upper flange connector 413 and the upper flange connector 423 are detachably connected to the kill line 1 and the production nozzle line 2, respectively. The extension direction of the support rod 412 and the support rod 422 is perpendicular to the horizontal plane.

[0028] Furthermore, the upper flange connector 413 includes a flange 5 connected to the kill line 1. The flange 5 is directly welded to the end of the support rod 412, and the plate surface of the flange 5 is parallel to the support rod 412. The flange 5 is connected to the kill line 1 and is used to fix and position the interface of the kill line 1.

[0029] Specifically, the lower flange connector 1 411, the lower flange connector 2 421, and the upper flange connector 2 423 all include a flange fixing connector 6 and a flange 2 7 welded to the end of the flange fixing connector 6.

[0030] Furthermore, the flange fixing connector 6 and flange 7 in the lower flange connector 1 411 and the lower flange connector 2 421 are arranged vertically, and the flange 7 in the lower flange connector 1 411 and the lower flange connector 2 421 are fixedly connected to two opposite interfaces on the wellhead system 3 by bolts.

[0031] Furthermore, the flange fixing connector 6 and flange 7 in the upper flange connector 2 423 are arranged in parallel. Flange 2 7 is connected to the production oil nozzle line 2 and is used to fix and position the interface of the production oil nozzle line 2.

[0032] Furthermore, the flange fixing connector 6 includes a crossbar 61 perpendicular to the support rod 412 or the support rod 422. The crossbar 61 has a connecting part for connecting the support rod 412 or the support rod 422. The connecting part has a groove and a bolt hole for inserting and fixing the support rod 412 or the support rod 422. A limiting plate 14 is provided above the section of the support rod 412 or the support rod 422 inserted into the crossbar 61. The limiting plate 14 has bolt holes that are adapted to the crossbar 61. The support rod 412 or the support rod 422 is inserted into the groove of the crossbar 61. The crossbar 61 is spliced ​​and fixed with the support rod 412 or the support rod 422 by tightening the bolts inserted into the limiting plate 14 and the bolt holes of the crossbar 61. The length of the crossbar 61 is adapted to the specifications of the oil well tree.

[0033] Furthermore, the wellhead system 3 is a general term for the high-lift pipe 8, the wellhead oil connecting the high-lift pipe 8, the casing four-way valve 9, the casing head, and various control systems.

[0034] Furthermore, the two opposing interfaces on the wellhead system 3 are located at both ends of the casing four-way 9. The two opposing interfaces on the wellhead system 3 include casing four-way flange one 10 and casing four-way flange two 11. Both casing four-way flange one 10 and casing four-way flange two 11 are provided with a sealing structure on the side facing away from the positioning device 4 to open, close or block the pipeline of their corresponding casing four-way 9. The sealing structure is a valve disassembly plug 12 and a valve 13. The sealing structure provided on the side facing away from the positioning device 4 of casing four-way flange one 10 and casing four-way flange two 11 can be any one of the two sealing structures mentioned above.

[0035] In some embodiments, taking the sealing structure on one side of the sleeve four-way flange 10 as the valve disassembly plug 12 and the sealing structure on one side of the sleeve four-way flange 21 as the valve 13 as an example, the sleeve four-way flange 10 blocks the pipe of its corresponding sleeve four-way 9 by inserting the valve disassembly plug 12 into the hole located in the center of the sleeve four-way flange 10. At this time, the sleeve four-way flange 21 opens and closes the pipe of its corresponding sleeve four-way 9 by switching the valve 13.

[0036] Furthermore, in some embodiments, support rod 1 412 and support rod 2 422 are straight rods of fixed length. The lengths of support rod 1 412 and support rod 2 422 are pre-cut according to the height of the installation position of the oil well tree before assembling into the first positioning component 41 and the second positioning component 42. The profiles used for support rod 1 412 and support rod 2 422 are round tubes, square steel, angle steel or I-beams, and the profiles can also be selected according to the actual site conditions.

[0037] Furthermore, in some other embodiments, such as Figure 4As shown, support rod 1 412 and support rod 2 422 are telescopic rod structures with adjustable length. The telescopic rod structure can be an outer telescopic rod 15 and an inner telescopic rod 16 embedded in the outer telescopic rod 15. The outer telescopic rod 15 is provided with a first connecting hole 151, and the inner telescopic rod 16 is provided with a plurality of second connecting holes 161 that match the first connecting hole 151. When the inner telescopic rod 16 slides radially along the outer telescopic rod 15 to a suitable position, and it is necessary to fix the height of the telescopic rod structure, the fixing part 17 that cooperates with the first connecting hole 151 and the second connecting hole 161 can be fixed. The fixing part 17 can be a pin or a bolt. In this embodiment, the support rod 1 412 and support rod 2 422 of the telescopic rod structure can be adjusted to a suitable length to adapt to the height of different oil well locations. The profiles used for support rod 1 412 and support rod 2 422 can be round tubes, square steel, angle steel or I-beams, and the profiles can also be selected according to the actual site conditions.

[0038] Taking the sealing structure on one side of the casing four-way flange 10 as the valve disassembly plug 12 and the sealing structure on one side of the casing four-way flange 11 as the valve 13 as an example, the specific implementation steps of the wellhead device simulating the positioning of the production tree in this embodiment are as follows:

[0039] Step 1: During the drilling operation, remove the flanges that were originally installed on the casing four-way flange 10 and casing four-way flange 21 in advance. Install the valve removal plug 12 on the center hole of the casing four-way flange 10. Close the valve 13 on one side of the casing four-way flange 211. Based on the location of the flange on the wellhead pipeline to be reconnected after the pre-installation of the wellhead pipeline, select the support rod 1 412 and support rod 2 422 of appropriate length in advance, or adjust the support rod 1 412 and support rod 2 422 of the telescopic rod structure to the appropriate length to adjust the height of the upper flange connector 1 413 and upper flange connector 2 423 for matching positioning. Then splice the first positioning component 41 and the second positioning component 42.

[0040] Step 2: Hoist the lower flange connector 411 of the assembled first positioning component 41 to the position of the sleeve four-way flange 10, and hoist the lower flange connector 421 of the assembled second positioning component 42 to the position of the sleeve four-way flange 11. After the flanges are fixed together, use a spirit level to calibrate the support rod 412 and support rod 422 to be consistent with the direction of gravity and confirm that they are perpendicular.

[0041] Step 3: After assembling and welding the kill line 1 and the production nozzle line 2, test the flange connection between the upper flange connector 1 (413) and the flange connector 2 (423) and the flanges of the kill line 1 and the production nozzle line 2, respectively. After the steel ring is installed and the flange is tightened, perform a low-pressure test on the installed and flaw-detected pipeline. During the low-pressure test, inject seawater or other liquids into the pipeline to slowly increase the pressure. Observe the pressure value through the pressure gauge on the pipeline. After the pressure reaches the test pressure, stabilize it for 10 minutes, then reduce the pressure to the design pressure and stop the pressure for 30 minutes. The test is considered successful if the pressure does not drop and there is no leakage. After the test is successful, install and fix the kill line 1 and the production nozzle line 2 in their current positions. This stage realizes the early reconnection of the production nozzle line 2 and the kill line 1, optimizes the wellhead pipeline layout process, and completes the low-pressure test of the wellhead pipeline, thereby optimizing the oil well construction process.

[0042] Step 4: After drilling is completed, remove the positioning device 4, pull out the valve and remove the plug 12, and reinstall the flanges on the casing four-way flange 10 and casing four-way flange 21; then align the flanges on the Christmas tree that connect the kill line 1 and the production nozzle line 2 with the interface positions of the kill line 1 and the production nozzle line 2 to complete the installation and connection of the Christmas tree and the wellhead pipeline. The pre-connected kill line 1 and production nozzle line 2 also meet the Christmas tree installation accuracy requirements.

[0043] Understandably, in traditional processes, there are no interfaces connecting the production nozzle line 2 and the kill line 1 during the drilling and completion stages of an oil well, making early reconnection impossible. The wellhead pipeline reconnection process must be carried out after the Christmas tree is installed, and the time from Christmas tree installation to production is relatively long, affecting oil well development efficiency. This utility model constructs a wellhead device that simulates Christmas tree positioning. Its positioning device 4, by pre-setting the position of the flange on the Christmas tree to reconnect the wellhead pipeline, enables the early reconnection of the kill line 1 and the production nozzle line 2 during the drilling and completion stages of the oil well. This is achieved through the upper flange connector 1 413 and upper flange connector 2 423 in the positioning device 4, thus achieving precise positioning of the production nozzle line 2 and the kill line 1. While meeting the accuracy requirements of Christmas tree installation, the positioning device 4 can also optimize the wellhead pipeline layout process and complete low-pressure testing of the wellhead pipeline, thereby optimizing the oil well construction process.

[0044] The above embodiments only illustrate preferred embodiments of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, the above technical features can be freely combined, and several modifications and improvements can be made without departing from the concept of the present utility model, all of which fall within the protection scope of the present utility model. Therefore, all equivalent transformations and modifications made within the scope of the claims of the present utility model should fall within the coverage of the claims of the present utility model.

Claims

1. A wellhead device for simulating the positioning of an oil wellhead, characterized in that, The system includes a kill line (1), a production nozzle line (2), a wellhead system (3), and a positioning device (4). The positioning device (4) includes a first positioning component (41) and a second positioning component (42) located on both sides of the wellhead system (3). The first positioning component (41) includes a lower flange connector (411), a support rod (412), and an upper flange connector (413) connected in sequence. The second positioning component (42) includes a lower flange connector (421), a support rod (422), and an upper flange connector (423) connected in sequence. The lower flange connector one (411) and the lower flange connector two (421) are detachably connected to two opposite interfaces on the wellhead system (3); The upper flange connector one (413) and the upper flange connector two (423) are respectively detachably connected to the kill line (1) and the production nozzle line (2); The extension directions of the first support rod (412) and the second support rod (422) are perpendicular to the horizontal plane.

2. The wellhead device for simulating tree positioning according to claim 1, characterized in that, The upper flange connector (413) includes a flange (5) connected to the well control pipeline (1). The flange (5) is directly connected to the end of the support rod (412), and the plate surface of the flange (5) is set parallel to the support rod (412).

3. The wellhead device for simulating tree positioning according to claim 1, characterized in that, The lower flange connector 1 (411), lower flange connector 2 (421), and upper flange connector 2 (423) all include a flange fixing connector (6) and a flange 2 (7) connected to the end of the flange fixing connector (6).

4. The wellhead device for simulating tree positioning according to claim 3, characterized in that, The flange fixing connector (6) and flange two (7) in the lower flange connector one (411) and lower flange connector two (421) are arranged vertically.

5. The wellhead device for simulating tree positioning according to claim 3, characterized in that, The flange fixing connector (6) and flange two (7) in the upper flange connector two (423) are arranged in parallel.

6. The wellhead device for simulating tree positioning according to claim 3, characterized in that, The flange fixing connector (6) includes a crossbar (61) arranged perpendicular to the first support rod (412) or the second support rod (422), and the crossbar (61) is provided with a connecting part for connecting the first support rod (412) or the second support rod (422).

7. The wellhead device for simulating tree positioning according to claim 1, characterized in that, The first support rod (412) and the second support rod (422) are straight rods of fixed length.

8. The wellhead device for simulating tree positioning according to claim 1, characterized in that, The support rod one (412) and support rod two (422) are telescopic rod structures with adjustable length.

9. The wellhead device for simulating tree positioning according to claim 8, characterized in that, The telescopic rod structure includes an outer telescopic rod (15) and an inner telescopic rod (16) embedded in the outer telescopic rod (15), and the outer telescopic rod (15) and the inner telescopic rod (16) are slidably connected.

10. The wellhead device for simulating tree positioning according to claim 1, characterized in that, The wellhead system (3) is provided with a casing tee (9). The two opposite interfaces on the wellhead system (3) include casing tee flange one (10) and casing tee flange two (11) located at both ends of the casing tee (9). Both casing tee flange one (10) and casing tee flange two (11) are provided with a sealing structure on the side away from the positioning device (4) to open, close or block the pipe of their corresponding casing tee (9).

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