Blanking plug and sealing pipe fitting

Abstract

The utility model provides a blanking plug and a sealing pipe fitting, and relates to the technical field of underground special tools. The blanking plug comprises a main body and a plugging joint. The main body comprises an upper joint and a lower joint; a first channel is arranged in the upper connector, a second channel is arranged in the lower connector, one end of the lower connector is arranged in the upper connector, and the first channel is communicated with the second channel. One end of the plugging joint is mounted in the first channel and detachably mounted in the second channel to plug the second channel; the periphery of the plugging joint is at least partially spaced from the inner wall of the first channel; and the other end of the plugging joint extends out of the first channel to be connected with an external cable. The sealing pipe fitting provided by the utility model adopts the blanking plug. According to the blanking plug and the sealing pipe fitting, the problems that in the prior art, when a blanking plug is used for the second time, cost is high, and manpower and time are wasted can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of downhole special tools, in particular to a plugging device and a sealing pipe fitting. BACKGROUND

[0002] In well completion operations, the plugging device is used in cooperation with a setting nipple to seal the passage in the pipe and complete the setting of the packer and the plugging of the tubing.

[0003] Normally, the setting nipple is connected above the setting ball seat, and if the ball seat is prematurely opened, the packer has not been set when the plugging device is lowered into the setting nipple to seal the tubing, thereby pressurizing and setting the packer again.

[0004] The plugging device is designed to consider the well leakage, and a anti-lifting device is usually designed, which is generally fixed by a shear pin.

[0005] However, after the shear pin is sheared, if it needs to be used again, the plugging device needs to be taken out of the wellhead, and the shear pin needs to be reassembled before it can be used again, which greatly wastes manpower and time and has a high cost. SUMMARY

[0006] The utility model solves the problem of high cost and waste of manpower and time in the secondary use of the plugging device in the prior art.

[0007] The embodiment of the utility model can be implemented as follows:

[0008] The utility model provides a plugging device for being loaded into a setting nipple, which comprises:

[0009] A main body comprising an upper joint and a lower joint; a first passage is arranged in the upper joint, and a second passage is arranged in the lower joint; one end of the lower joint is loaded into the upper joint, and the first passage and the second passage are communicated;

[0010] A plugging joint, one end of which is loaded into the first passage and detachably loaded into the second passage to seal the second passage; the outer periphery of the plugging joint is at least partially spaced from the inner wall of the first passage; the other end of the plugging joint extends out of the first passage to be connected with an external cable.

[0011] The plugger provided by the utility model has the beneficial effects of the prior art, which include:

[0012] The plugger is applied to the sitting nipple, and the closure of the channel is realized by the way that the sealing joint is loaded into the second channel, so that the sealing of the upper and lower pipelines is realized. When the channel needs to be established to balance the pressure of the upper and lower pipelines, the sealing joint is pulled out by the cable connected with the sealing joint, so that the first channel and the second channel are conducted, the establishment of the channel is completed, and the pressure balance of the upper and lower pipelines can be realized. When the plugger needs to be used again, the sealing joint is lowered by the cable, and the sealing joint is loaded into the second channel by the gravity of the sealing joint, so that the second channel is closed, the channel is closed, and the sealing is completed. Compared with the prior art, the setting of the shear nail is cancelled, the manufacturing cost is reduced, the problems of high cost and waste of manpower and time caused by the setting of the shear nail when the plugger is used again are avoided. Therefore, the plugger provided by the utility model can improve the problems of high cost and waste of manpower and time when the plugger is used again in the prior art.

[0013] Optionally, the end portion of the first channel is provided with a sealing portion, and the sealing portion is loaded into the second channel to seal the second channel.

[0014] Optionally, the cross-sectional area of the sealing portion near the end portion of the lower joint gradually decreases in the direction close to the lower joint, and a spherical curved surface is formed.

[0015] Optionally, the opening of the second channel close to the sealing joint is in a flared shape.

[0016] Optionally, the inner wall of the first channel is provided with a first limiting portion, and the end portion of the sealing joint loaded into the first channel is provided with a second limiting portion; when the sealing joint moves away from the lower joint, the first limiting portion is used to abut against the second limiting portion to limit the movement of the sealing joint.

[0017] Optionally, the first limiting portion is annular, and a gap is formed between the sealing joint and the first limiting portion; the outer periphery of the sealing joint is provided with a plurality of second limiting portions, and the plurality of second limiting portions are arranged at intervals.

[0018] Optionally, the lower joint includes a loading segment and an external segment divided in the axial direction; the outer diameter of the loading segment is smaller than the outer diameter of the external segment, and a stepped structure is formed between the loading segment and the external segment; the loading segment is loaded into the first channel, and the external segment is located outside the first channel and abuts against the end face of the upper joint.

[0019] Optionally, the loading section comprises a first sealing section and a first connecting section divided in the axial direction; the outer diameter of the first sealing section is smaller than the outer diameter of the first connecting section, and a stepped structure is formed; the upper joint comprises a second sealing section and a second connecting section divided in the axial direction, the inner diameter of the inner passage of the second sealing section is smaller than the inner diameter of the inner passage of the second connecting section; the outer periphery of the first sealing section is matched with the inner wall of the second sealing section; the outer periphery of the first connecting section is matched with the inner wall of the second connecting section; a sealing ring is arranged between the first sealing section and the second sealing section.

[0020] Optionally, a containing groove is further formed in the outer wall of the upper joint, and the containing groove is used for mounting a sealing member; one side of the sealing member close to the external section abuts against the external section.

[0021] A sealing pipe fitting comprises the plug described above.

[0022] The sealing pipe fitting provided by the utility model adopts the plug described above, and the beneficial effects of the sealing pipe fitting provided by the utility model relative to the prior art are the same as those of the plug provided above relative to the prior art, which will not be described herein again. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will be briefly introduced the drawings needed to be used in the embodiments, it should be understood, the following drawings only shows some embodiments of the utility model, therefore should not be regarded as the limitation to the scope, for the ordinary skilled person in the art, under the premise of not paying the creative labor, still can obtain other related drawings according to these drawings.

[0024] Figure 1 It is the structural schematic diagram of the plug provided in the embodiment.

[0025] Icon: plug 10, main body 100, upper joint 110, first passage 101, containing groove 103, second sealing section 111, second connecting section 112, lower joint 120, second passage 102, external section 121, loading section 122, first sealing section 1221, first connecting section 1222, plugging joint 200, plugging part 210. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model more clear, the following will be combined with the drawings in the embodiments of the utility model, and the technical scheme in the embodiments of the utility model is clearly and completely described, obviously, the described embodiments are a part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0027] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application.

[0028] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the present application is used, and is only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0030] In addition, if the terms "first", "second" and the like appear, they are only used for differentiation in description and cannot be understood as indicating or implying relative importance.

[0031] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.

[0032] Please refer to Figure 1 In the present embodiment, a plugger 10 is provided, which is applied to a sitting nipple in a well for closing or conducting the upper and lower pipes connected by the sitting nipple. It should be noted that the "well" refers to an engineering well such as an oil well, a mine well, etc. The plugger 10 provided in the present embodiment can improve the problem of high cost and waste of manpower and time in the secondary use of the plugger 10 in the prior art.

[0033] The plugger 10 comprises a main body 100 and a plugging joint 200. The main body 100 comprises an upper joint 110 and a lower joint 120; the upper joint 110 is provided with a first channel 101, the lower joint 120 is provided with a second channel 102, one end of the lower joint 120 is fitted into the upper joint 110, and the first channel 101 and the second channel 102 are communicated. One end of the plugging joint 200 is fitted into the first channel 101, and the other end is detachably fitted into the second channel 102 to block the second channel 102; the outer periphery of the plugging joint 200 is at least partially spaced from the inner wall of the first channel 101; the other end of the plugging joint 200 extends out of the first channel 101 for connecting an external cable.

[0034] It should be noted that when the plug 10 is applied to the sitting nipple, the upper joint 110 is located above the lower joint 120, and the blocking joint 200 is located above the lower joint 120. Further, in the present embodiment, the blocking joint 200 can be loaded into the second channel 102 by its own gravity, in other words, after the blocking joint 200 is manually removed from the second channel 102, the blocking joint 200 can be returned to the state of being loaded into the second channel 102 under the action of its own gravity by canceling the manual action, thereby achieving the closing of the second channel 102.

[0035] As described above, in the case of applying the plug 10 in the sitting nipple, the plug 10 in the present embodiment achieves the closing of the channel by loading the blocking joint 200 into the second channel 102, thereby achieving the sealing of the upper and lower pipelines. When it is necessary to establish a channel to balance the pressure of the upper and lower pipelines, only the first channel 101 and the second channel 102 are conducted by pulling out the blocking joint 200 through the cable connected to the blocking joint 200, thereby completing the establishment of the channel and achieving the pressure balance of the upper and lower pipelines. In the case of secondary use of the plug 10, only the second channel 102 is closed by loading the blocking joint 200 into the second channel 102 through the gravity of the blocking joint 200 by means of the cable, thereby achieving the closing of the channel and completing the sealing. Compared with the prior art, the setting of the shear pin is cancelled, which not only reduces the manufacturing cost, but also avoids the problems of high cost and waste of manpower and time caused by the setting of the shear pin when the plug 10 is used twice. Based on this, the plug 10 provided by the present application can improve the problems of high cost and waste of manpower and time when the plug 10 is used twice in the prior art.

[0036] In the present embodiment, the end of the blocking joint 200 located in the first channel 101 is provided with a blocking portion 210, which is detachably loaded into the second channel 102 to block the second channel 102. Through the setting of the blocking portion 210, the loading of the blocking joint 200 into the second channel 102 can be facilitated, thereby facilitating the blocking of the second channel 102.

[0037] Further, the cross-sectional area of the end of the blocking portion 210 close to the lower joint 120 gradually decreases in the direction close to the lower joint 120, and forms a spherical curved surface. The end of the blocking portion 210 is formed in a spherical structure, which on the one hand can facilitate the loading of the blocking portion 210 into the second channel 102, and on the other hand can facilitate the cooperation of the blocking portion 210 with the inner wall of the second channel 102 to achieve sealing. It should be understood that in other embodiments, the blocking portion 210 can also be provided in a conical or frustoconical shape.

[0038] In addition, the second channel 102 is flared near the opening of the plugging joint 200. The opening of the second channel 102 is flared, which can further facilitate the plugging part 210 to enter the second channel 102. When the plug 10 is used for the second time, the plugging part 210 can be conveniently loaded into the second channel 102, which is beneficial to efficiently complete the closure.

[0039] In the embodiment, the inner wall of the first channel 101 is provided with a first limiting part, and the end portion of the plugging joint 200 loaded into the first channel 101 is provided with a second limiting part; in the case that the plugging joint 200 moves away from the lower joint 120, the first limiting part is used to abut against the second limiting part to limit the movement of the plugging joint 200. That is, when the channel needs to be established, the first limiting part and the second limiting part abut against each other when the plugging joint 200 is removed, which can avoid the plugging joint 200 from being pulled out of the first channel 101, so that the end portion of the plugging joint 200 is always located in the first channel 101. When the plug 10 is used for the second time, since the end portion of the plugging joint 200 is located in the first channel 101, the plugging joint 200 can be easily loaded into the second channel 102 again, which greatly improves the efficiency of the second use and reduces the waste of manpower and time.

[0040] Of course, in order to prevent the first limiting part and the second limiting part from affecting the establishment of the channel, in the embodiment, the first limiting part is annular, and a gap is formed between the plugging joint 200 and the first limiting part; the outer periphery of the plugging joint 200 is provided with a plurality of second limiting parts, and the plurality of second limiting parts are arranged at intervals. The gap between the two adjacent second limiting parts can realize the channel conduction of the upper and lower pipelines, realize the pressure balance of the upper and lower pipelines, and complete the establishment of the channel.

[0041] In the embodiment, the lower joint 120 includes a loading section 122 and an external section 121 divided in the axial direction; the outer diameter of the loading section 122 is smaller than the outer diameter of the external section 121, and a stepped structure is formed between the loading section 122 and the external section 121; the loading section 122 is loaded into the first channel 101, and the external section 121 is located outside the first channel 101 and abuts against the end face of the upper joint 110.

[0042] Further, the loading section 122 comprises a first sealing section 1221 and a first connecting section 1222 which are axially divided; the outer diameter of the first sealing section 1221 is smaller than that of the first connecting section 1222, and a stepped structure is formed; the upper joint 110 comprises a second sealing section 111 and a second connecting section 112 which are axially divided, and the inner diameter of the inner passage of the second sealing section 111 is smaller than that of the inner passage of the second connecting section 112; the outer periphery of the first sealing section 1221 is matched with the inner wall of the second sealing section 111; the outer periphery of the first connecting section 1222 is matched with the inner wall of the second connecting section 112; and a sealing ring is arranged between the first sealing section 1221 and the second sealing section 111. Figure 1 The dashed line A can be regarded as a division line which divides the first connecting section 1222 and the first sealing section 1221, and can also be regarded as a division line which divides the second connecting section 112 and the second sealing section 111.

[0043] Optionally, the first connecting section 1222 and the second connecting section 112 can be connected in a threaded connection manner. Of course, in other embodiments, the first connecting section 1222 and the second connecting section 112 can also be matched in an interference fit manner.

[0044] In addition, a plurality of annular grooves are arranged on the outer periphery of the first sealing section 1221 to facilitate the accommodation of the sealing ring, ensure the stable installation of the sealing ring, and ensure the stability of the sealing performance.

[0045] In the embodiment, the outer wall of the upper joint 110 is also provided with a receiving groove 103 for installing a sealing member; the side of the sealing member close to the outer section 121 abuts against the outer section 121. In other words, the receiving groove 103 is open on the side close to the lower joint 120, and the sealing member can be loaded into the receiving groove 103 from the opening, which is conducive to reducing the assembly difficulty and improving the assembly efficiency. After the outer section 121 is loaded, the outer section 121 can provide a limiting effect on the sealing member, which can ensure the stable assembly of the sealing member and further ensure the stability of the sealing performance.

[0046] Based on the above-provided plug 10, the sealing pipe fitting provided in the embodiment also adopts the plug 10 described above. The sealing pipe fitting provided in the embodiment can also improve the problem of high cost and waste of manpower and time in the secondary use of the plug 10 in the prior art.

[0047] In summary, in the plug 10 and the sealing pipe provided in the embodiment, the closure of the channel is realized by the way that the blocking joint 200 is loaded into the second channel 102, so as to realize the sealing of the upper and lower pipes. When the channel needs to be established to balance the pressure of the upper and lower pipes, the first channel 101 and the second channel 102 are conducted by only pulling out the blocking joint 200 through the cable connected with the blocking joint 200, so as to complete the establishment of the channel and realize the pressure balance of the upper and lower pipes. When the plug 10 needs to be used twice, the second channel 102 is closed by only loading the blocking joint 200 into the second channel 102 through the gravity of the blocking joint 200, so as to realize the closure of the channel and complete the sealing. Compared with the prior art, the setting of the shear nail is cancelled, so that the manufacturing cost is reduced, and the problems of high cost and waste of manpower and time caused by the setting of the shear nail when the plug 10 is used twice are avoided. Therefore, the plug 10 provided in the utility model can improve the problems of high cost and waste of manpower and time when the plug 10 is used twice in the prior art.

[0048] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. A plug (10) for packing into a sitting nipple, characterized in that, The plug (10) comprises: a main body (100) comprising an upper joint (110) and a lower joint (120); a first channel (101) is arranged in the upper joint (110), and a second channel (102) is arranged in the lower joint (120); one end of the lower joint (120) is arranged in the upper joint (110), and the first channel (101) and the second channel (102) are communicated; a plugging joint (200) arranged in the first channel (101) and detachably arranged in the second channel (102) to plug the second channel (102); an outer periphery of the plugging joint (200) is at least partially spaced from an inner wall of the first channel (101); the other end of the plugging joint (200) extends out of the first channel (101) to be connected with an external cable.

2. The obturator (10) according to claim 1, characterized in that The plugging joint (200) is provided with a plugging portion (210) at an end portion of the first channel (101); the plugging portion (210) is detachably arranged in the second channel (102) to plug the second channel (102).

3. The obturator (10) according to claim 2, characterized in that A cross-sectional area of the plugging portion (210) near an end portion of the lower joint (120) gradually decreases in a direction close to the lower joint (120) and forms a spherical curved surface.

4. The obturator (10) according to claim 3, characterized in that An opening of the second channel (102) close to the plugging joint (200) is in a flared shape.

5. The obturator (10) according to claim 1, characterized in that The inner wall of the first channel (101) is provided with a first limiting portion, and an end portion of the plugging joint (200) arranged in the first channel (101) is provided with a second limiting portion; when the plugging joint (200) moves away from the lower joint (120), the first limiting portion is used to abut against the second limiting portion to limit the movement of the plugging joint (200).

6. The obturator (10) according to claim 5, characterized in that The first limiting portion is in an annular shape, and a gap is formed between the plugging joint (200) and the first limiting portion; the outer periphery of the plugging joint (200) is provided with a plurality of second limiting portions, and the plurality of second limiting portions are arranged at intervals.

7. The obturator (10) according to claim 1, characterized in that The lower joint (120) comprises an arranged segment (122) and an external segment (121) divided in an axial direction; an outer diameter of the arranged segment (122) is smaller than an outer diameter of the external segment (121), and a stepped structure is formed between the arranged segment (122) and the external segment (121); the arranged segment (122) is arranged in the first channel (101), and the external segment (121) is arranged outside the first channel (101) and abuts against an end face of the upper joint (110).

8. The obturator (10) according to claim 7, characterized in that The loading section (122) comprises a first sealing section (1221) and a first connecting section (1222) divided in the axial direction; the outer diameter of the first sealing section (1221) is smaller than that of the first connecting section (1222), and a stepped structure is formed; the upper joint (110) comprises a second sealing section (111) and a second connecting section (112) divided in the axial direction, the inner diameter of the inner passage of the second sealing section (111) is smaller than that of the second connecting section (112); the outer periphery of the first sealing section (1221) is matched with the inner wall of the second sealing section (111); the outer periphery of the first connecting section (1222) is matched with the inner wall of the second connecting section (112); a sealing ring is arranged between the first sealing section (1221) and the second sealing section (111).

9. The obturator (10) according to claim 7, characterized in that A containing groove (103) is further formed on the outer wall of the upper joint (110), and the containing groove (103) is used for installing a sealing member; one side of the sealing member close to the external section (121) abuts against the external section (121).

10. A sealed tube, characterized by The plug (10) comprises the plug (10) according to any one of claims 1-9.

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