Quick sealing tubing hanger device

Abstract

The invention relates to the technical field of oil field wellhead construction devices, in particular to a quick sealing tubing hanger device. The rapid sealing oil pipe hanger device comprises an oil pipe penetrating through an oil pipe hanger, an opening and closing groove is formed in the oil pipe hanger, a buckling cover is arranged in the opening and closing groove, one end of the buckling cover is movably connected with the opening and closing groove, the other end of the buckling cover is detachably connected with the oil pipe hanger, the buckling cover and the oil pipe hanger form a circular truncated cone with the diameter shrunk downwards after the buckling cover is buckled with the opening and closing groove, and the interior of the buckling cover is hollow to form a cable channel. After the buckle cover is buckled to the opening and closing groove, the upper and lower ends of the contact surface of the buckle cover and the opening and closing groove are respectively provided with cable channels. According to the rapid sealing oil pipe hanger device, the circular truncated cone formed by the oil pipe hanger and the buckling cover seals a well mouth along with the gravity of an oil pipe; by arranging the cable channel and the cable passing opening, the cable can go deep into the well, and the cable can be inserted into an underground tool while the well mouth is sealed; and meanwhile, the cable can be directly taken out through the cable channel and does not need to be cut off, so that the operation process is simplified, and the working time is saved.

Description

Technical Field

[0001] This invention relates to the field of oilfield wellhead construction equipment technology, and in particular to a rapid sealing tubing hanger device. Background Technology

[0002] In well washing operations, the wellhead needs to be sealed after the well washing equipment is lowered into the well before the washing operation can begin. In existing technology, the tubing hanger is installed on the tubing and descends to the wellhead for sealing. However, during the sealing process and installation of the tubing hanger, there is no designated location for the cable to be routed to the downhole electric well washing device, preventing the well washing operation from proceeding without a proper seal, leading to a large amount of crude oil spillage. Furthermore, in some cases, to simultaneously seal the wellhead and lower the well washing equipment, holes need to be drilled in the tubing hanger, cables inserted, and then sealed using methods such as glue. However, during the retrieval and repositioning of the downhole washing equipment, the sealed holes fix the cable position. This necessitates cutting the portion of the cable passing through the tubing hanger and rewiring the well washing device before it can be used again, increasing workload, wasting cable materials, adding to the construction process, and extending working time. Therefore, to address these shortcomings, a rapid sealing tubing hanger device is proposed. Summary of the Invention

[0003] (a) Technical problems to be solved To address the shortcomings of existing technologies, this invention provides a rapid sealing tubing hanger, which solves the problem that the downhole tool cable cannot pass through while sealing the wellhead; it also solves the problem of cable waste and extended working time caused by the cable not being able to be retrieved with the downhole tool after being extended downhole.

[0004] (II) Technical Solution To solve the above problems, the present invention provides a quick-sealing oil pipe hanger, comprising: The tubing hanger and tubing, wherein the tubing passes through the tubing hanger, are characterized in that the outer wall of the tubing hanger has a vertically penetrating opening and closing groove, and a matching cover is provided in the opening and closing groove. After the cover is fastened into the opening and closing groove, it forms a truncated cone with the tubing hanger, the diameter of which narrows downwards, and the maximum diameter of the truncated cone is greater than the wellhead diameter. One end of the cover is movably connected to one end of the opening and closing groove, and the other end is detachably connected to the tubing hanger. After the cover is fastened into the opening and closing groove, the interior of the cover is hollow, forming a cable channel. The upper and lower ends of the contact surface where the cover and the opening and closing groove are fastened are respectively provided with cable ports that communicate with the cable channel. The shape of the cable port matches the shape of the field cable, and the cable port is sealed after the cable is inserted into it.

[0005] Preferably, the left and right sides of the cover are respectively provided with a left cover insert plate and a right cover insert plate. The left cover insert plate is movably connected to the left end of the opening and closing groove, and the right cover insert plate is detachably connected to the oil pipe hanger.

[0006] Preferably, an elastic rod is connected between the left insert plate of the cover and the left end of the opening and closing groove. The two ends of the elastic rod pass through the side walls of the left insert plate of the cover and the opening and closing groove, respectively. One end of the elastic rod that enters the left insert plate of the cover is provided with a magnetic attracting piece, and the other end is provided with an inner baffle.

[0007] Preferably, the right insert plate of the cover is connected to the oil pipe hanger via a magnetic attraction structure.

[0008] Preferably, the magnetic attraction structure includes an opening and closing magnetic plate and a fixed magnetic plate. The outer side of the right insert plate of the cover is provided with an inlay groove, and the opening and closing magnetic plate is installed in the inlay groove. The fixed magnetic plate is installed on the side wall on the right side of the opening and closing groove of the oil pipe hanger and its position corresponds to that of the opening and closing magnetic plate.

[0009] Preferably, a sealing strip is provided at the position where the oil pipe hanger contacts the right insert plate of the cover.

[0010] Preferably, the sealing strip is made of an elastic material.

[0011] Preferably, the elastic rod is made of an elastic material.

[0012] Preferably, the cable channel is provided with a plurality of vertically oriented cable grooves, the shape of which matches the cable.

[0013] (III) Beneficial Effects The rapid sealing tubing hanger device provided by this invention, through the downward-contracting truncated cone formed by the tubing hanger and the cap, can seal the wellhead with the gravity of the tubing as it is lowered into the well. By providing a cable channel and cable port between the tubing hanger and the cap, the cable of the downhole tool can be extended into the well through the cable channel and cable port, achieving simultaneous sealing of the wellhead and well cleaning. Furthermore, through the cable channel between the cap and the tubing hanger, the cable can be directly retrieved or its position adjusted after opening the cap, eliminating the need to cut the cable during retrieval and adjustment, reducing the number of times the downhole tool needs to be connected, simplifying the operation process, and saving working time. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of the quick-sealing oil pipe hanger of the present invention when it is opened; Figure 2 This is a schematic diagram of the quick-sealing oil pipe hook device of the present invention when it is engaged; Figure 3This is a schematic diagram of the quick-sealing oil pipe hanging device of the present invention, showing the connection end between the cover and the opening and closing groove.

[0015] Among them, 1. Oil pipe hanger; 2. Oil pipe; 3. Cover; 4. Cover left insert plate; 5. Cover right insert plate; 6. Embedding groove; 7. Opening and closing magnetic plate; 8. Fixing magnetic plate; 9. Cable port; 10. Cable channel; 11. Attracting magnetic sheet; 12. Inner baffle; 13. Elastic rod; 14. Opening and closing groove. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] In the description of this invention, it is necessary to understand that the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "outer", "top", and "bottom" are based on the orientation or positional relationship shown in the accompanying drawings. The purpose is only to facilitate the description of this invention and to simplify the description. It is not intended to indicate or imply that the component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0018] like Figure 1-3 As shown, the present invention provides a quick-sealing oil pipe hanger, specifically comprising: The system consists of a tubing hanger 1 and a tubing 2, with the tubing 2 passing through the tubing hanger 1. The tubing 2 needs to be lowered into the target well during operation. After the tubing 2 passes through the tubing hanger 1, the tubing hanger 1 is fixed to the side wall of the tubing 2. When the tubing 2 is lowered into the well, the tubing hanger 1 moves downwards with the tubing 2 and sits at the wellhead to seal it. The tubing hanger 1 has an opening / closing groove 14, within which is a matching cover 3. The cable of the downhole tool is placed between the cover 3 and the opening / closing groove 14. By clamping the cover 3 and the opening / closing groove 14, the position of the cable can be fixed. Before the tubing hanger 1 moves downwards with the tubing 2 to seal the wellhead, the cover 3 and the opening / closing groove 14 are opened, and the cable of the downhole tool is placed between the cover 3 and the opening / closing groove 14 and clamped. At this time, lowering the tubing 2 allows the cable of the downhole tool to be sent into the well simultaneously with lowering the tubing hanger 1 to seal the wellhead, providing power to the downhole tool and thus achieving well cleaning while sealing the wellhead. After the cover 3 is fastened into the opening and closing groove 14, it forms a truncated cone with the tubing hanger 1, the diameter of which is narrowing downwards. The maximum diameter of the truncated cone is larger than the diameter of the wellhead. When the cover 3 is fastened into the opening and closing groove 14, as the tubing hanger 1 is lowered into the well along with the tubing 2, the gravity of the tubing 2 acts on the tubing hanger 1, causing the tubing hanger 1 to move downwards. As the diameter of the tubing hanger 1 gradually increases from bottom to top, the tubing hanger 1 and the wellhead are gradually clamped together to achieve a seal on the wellhead. During the process of the tubing hanger 1 and the wellhead being gradually clamped together, the cover 3 is also squeezed by the wellhead, causing the cover 3 and the opening and closing groove 14 to gradually clamp together, thereby sealing the cover 3 and the opening and closing groove 14 and preventing the downhole liquid from overflowing from the cover 3 and the opening and closing groove 14.

[0019] One end of the cover 3 is movably connected to one end of the opening and closing groove 14, and the other end is detachably connected to the oil pipe hanger 1. This ensures that one end of the cover 3 is always connected to the oil pipe hanger 1, while the detachable connection of the other end to the oil pipe hanger 1 facilitates the opening and closing of the cover 3 on the oil pipe hanger 1. When the cover 3 is fastened onto the oil pipe hanger 1, the detachable connection fixes the position of the cover 3, preventing the cable between the cover 3 and the opening and closing groove 14 from falling off as the oil pipe hanger 1 moves up and down with the oil pipe 2. This avoids repeated clamping of the cable, improves the stability of the device, and saves working time.

[0020] It should be noted that the left and right sides of the cover 3 are respectively provided with a left cover insert plate 4 and a right cover insert plate 5. The left cover insert plate 3 is movably connected to the left end of the opening and closing groove 14, and the right cover insert plate 5 is detachably connected to the oil pipe hanger 1. When the cover 3 is opened and closed on the oil pipe hanger 1, the cover 3 rotates along the left cover insert plate 4 to open and close outward. At this time, the right cover insert plate 5 separates from the oil pipe hanger 1. At the same time, the left cover insert plate 4 and the right cover insert plate 5 can increase the contact area between the cover 3 and the oil pipe hanger 1, which facilitates the connection between the oil pipe hanger 1 and the cover 3.

[0021] In this invention, an elastic rod 13 connects the left insert plate 4 of the cover and the left end of the opening and closing groove 14. The two ends of the elastic rod 13 pass through the side walls of the left insert plate 4 of the cover and the opening and closing groove 14, respectively. The elastic rod 13 is elastic. When the cover 3 is opened, the elastic rod 13 stretches under its own elasticity to connect the left insert plate 4 of the cover with the opening and closing groove 14, preventing the cover 3 from falling off the opening and closing groove 14. When the cover 3 is closed, the elastic rod 13 shortens to its original length under its own elasticity, and the cover 3 is closed into the opening and closing groove 14.

[0022] The elastic rod 13 has a magnetic attracting piece 11 at one end of its insertion into the left insert plate 4 of the cover, and an inner baffle 12 at the other end. The diameters of both the magnetic attracting piece 11 and the inner baffle 12 are larger than the diameter of the elastic rod 13. When the cover 3 is opened, the inner baffle 12 and the magnetic attracting piece 11 are respectively held inside the side wall of the opening groove 14 and inside the left insert plate 4 of the cover, preventing the cover 3 from detaching from the oil pipe hanger 1 after opening. The magnetic attracting piece 11 is magnetic. Normally, both the oil pipe hanger 1 and the cover 3 are made of metal. When the cover 3 is fastened into the opening groove 14, the magnetic attracting piece 11 will adhere to the inner wall of the left insert plate 14, thus pushing the elastic rod 13 into the oil pipe hanger 1, preventing part of the elastic rod 13 from remaining between the cover 3 and the opening groove 14 and affecting the tight fit between them.

[0023] It should be noted that the elastic rod 13 is made of materials with good elasticity and ductility, such as rubber or springs, to prevent breakage of the elastic rod 13 during repeated opening and closing of the cover 3.

[0024] like Figure 1 As shown, the right insert plate 5 of the cover and the oil pipe hanger 1 are connected by a magnetic structure. When the cover 3 is fastened into the opening and closing groove 14, the magnetic structure attracts the right insert plate 5 of the cover and the oil pipe hanger 1 together to form a fixed structure, thereby realizing the detachable connection between the right insert plate 5 of the cover and the oil pipe hanger 1.

[0025] The magnetic structure includes an opening and closing magnetic plate 7 and a fixed magnetic plate 8. The outer side of the right insert plate 5 of the cover has an inlay groove 6, and the opening and closing magnetic plate 7 is installed in the inlay groove 6. The fixed magnetic plate 8 is installed on the right side wall of the opening and closing groove 14 of the oil pipe hanger 1, and its position corresponds to that of the opening and closing magnetic plate 7. When the cover 3 is fastened into the opening and closing groove 14, the fixed magnetic plate 8 and the opening and closing magnetic plate 7 attract each other under their own magnetic force. At this time, the right insert plate 5 of the cover is fixed to the inner wall of the opening and closing groove 14 under the action of magnetic force, thereby fixing the position of the cover 3.

[0026] It should be noted that, in order to improve the airtightness of the device, a sealing strip is provided at the contact position between the tubing hanger 1 and the right insert plate 5 of the cover. The sealing strip is made of a material with good elasticity, such as rubber, and is a film covering the right side wall of the opening and closing groove 14. When the cover 3 is fastened into the opening and closing groove 14, the right insert plate 5 of the cover and the opening and closing groove press the sealing strip tightly. As the tubing hanger 1 gradually sits into the wellhead, the cover 3 receives pressure from the wellhead and gradually presses the sealing strip, thereby improving the sealing between the cover and the tubing hanger 1 and preventing the downhole fluid from overflowing.

[0027] like Figure 2 As shown, after the cover 3 is fastened to the opening and closing groove 14, the inside of the cover 3 is hollow to form a cable channel 10. The upper and lower ends of the contact surface where the cover 3 and the opening and closing groove 14 are fastened are respectively provided with a cable port 9 that communicates with the cable channel 10. When the cable of the downhole tool is clamped between the cover 3 and the opening and closing groove 14, it is located in the cable channel 10 and the cable port 9, which prevents the cable from being broken due to excessive pressure between the cover 3 and the opening and closing groove 14 during the wellhead setting process, thus protecting the integrity of the downhole tool cable.

[0028] The shape of the cable access port 9 matches the shape of the field cable, and the cable, after being inserted into the cable access port 9, seals the cable access port 9. Sealing the cable access port 9 prevents downhole fluid from overflowing from it during well washing. To further improve the sealing performance of the cable access port 9, a sealing ring can be installed inside each cable access port 9. During the setting and sealing of the wellhead by the tubing hanger 1, the pressure of the cover 3 towards the opening and closing groove 14 will gradually press the sealing ring tightly against the cable, thereby achieving a seal on the cable access port 9.

[0029] It should be noted that the cable channel 10 is provided with several vertical cable grooves, the shape of which matches the cable. After the cable is clamped in the cable channel 10, each cable is dropped into a cable groove. After the cover 3 is fastened, the cable groove can fix the position of the cable, preventing the cables in the cable channel 10 from getting tangled due to the movement of downhole tools or tubing 2 during well cleaning operations, and preventing the cables from getting knotted.

[0030] The rapid sealing tubing hanger provided by this invention can simultaneously seal the wellhead and deliver a cable to the downhole tools for sealing and well washing. Furthermore, it eliminates the need to cut or replace the cable during device retrieval and repositioning, reducing operational steps and saving time. The specific operation process of this device is as follows: Step 1: Insert the tubing into the tubing hanger and fix the tubing hanger onto the tubing. Install well-washing tools below the tubing hanger as needed.

[0031] Step 2: Open the cover, place the cable of the well cleaning tool in the cable trough, and then close the cover to clamp the cable.

[0032] Step 3: Lower the well cleaning tools and tubing into the well in sequence, and then set the wellhead with the tubing hanger. During this process, the tubing hanger moves downwards with the tubing and sits in the wellhead. The weight of the tubing acts on the tubing hanger, causing it to move downwards at the wellhead. As the diameter of the tubing hanger gradually increases upwards, the pressure received by the tubing hanger from the wellhead gradually increases during its descent. When it reaches a certain position, the tubing hanger can no longer descend, at which point the outer wall of the tubing hanger tightly seals the wellhead. During the setting process, the pressure received by the cap from the wellhead gradually increases. At this time, the cap and the opening / closing groove gradually clamp together, simultaneously clamping and sealing the cable connection port, thus achieving a complete seal of the wellhead.

[0033] Step 4: Start the downhole washing tools to perform the washing operation. During the washing operation, the tubing is seated and sealed at the wellhead, preventing downhole fluid from overflowing.

[0034] Step 5: After the well is cleaned, pull up the tubing to retrieve the downhole tools and open the cover to remove and retrieve the cable.

[0035] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A quick-sealing oil pipe hanger device, comprising an oil pipe hanger (1) and an oil pipe (2), wherein the oil pipe (2) passes through the oil pipe hanger (1), characterized in that, The outer wall of the tubing hanger (1) is provided with a vertically penetrating opening and closing groove (14), and a matching cover (3) is provided inside the opening and closing groove (14). After the cover (3) is fastened into the opening and closing groove (14), it forms a truncated cone with the tubing hanger (1) with the diameter shrinking downward, and the maximum diameter of the truncated cone is greater than the diameter of the wellhead. One end of the cover (3) is movably connected to one end of the opening and closing groove (14), and the other end is detachably connected to the tubing hanger (1). After the cover (3) is fastened into the opening and closing groove (14), the inside of the cover (3) is hollow to form a cable channel (10). At the upper and lower ends of the contact surface where the cover (3) and the opening and closing groove (14) are fastened, there is a cable port (9) that is connected to the cable channel (10). The shape of the cable port (9) matches the shape of the field cable. After the cable is inserted into the cable port (9), the cable port (9) is sealed.

2. The quick-sealing oil pipe hanger according to claim 1, characterized in that, The left and right sides of the cover (3) are respectively provided with a left cover insert plate (4) and a right cover insert plate (5). The left cover insert plate (4) is movably connected to the left end of the opening and closing groove (14), and the right cover insert plate (5) is detachably connected to the oil pipe hanger (1).

3. The quick-sealing oil pipe hanger according to claim 2, characterized in that, An elastic rod (13) is connected between the left end of the cover left insert plate (4) and the opening and closing groove (14). The two ends of the elastic rod (13) pass through the side walls of the cover left insert plate (4) and the opening and closing groove (14), respectively. One end of the elastic rod (13) that enters the cover left insert plate (4) is provided with a magnetic sheet (11), and the other end is provided with an inner baffle (12).

4. The quick-sealing oil pipe hanger according to claim 2, characterized in that, The right insert plate (5) of the cover is connected to the oil pipe hanger (1) by a magnetic attraction structure.

5. The quick-sealing oil pipe hanger according to claim 4, characterized in that, The magnetic structure includes an opening and closing magnetic plate (7) and a fixed magnetic plate (8). The outer side of the right insert plate (5) of the cover is provided with an inlay groove (6), and the opening and closing magnetic plate (7) is installed in the inlay groove (6). The fixed magnetic plate (8) is installed on the side wall on the right side of the opening and closing groove (14) of the oil pipe hanger (1) and its position corresponds to the opening and closing magnetic plate (7).

6. The quick-sealing oil pipe hanger according to any one of claims 2-5, characterized in that, A sealing strip is provided at the position where the oil pipe hanger (1) contacts the right insert plate (5) of the cover.

7. The quick-sealing oil pipe hanger according to claim 6, characterized in that, The sealing strip is made of elastic material.

8. The quick-sealing oil pipe hanger according to claim 3, characterized in that, The elastic rod (13) is made of elastic material.

9. The quick-sealing oil pipe hanger according to claim 1, characterized in that, The cable channel (10) is provided with several vertical cable grooves, the shape of which matches the cable.

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