Multifunctional anti-overflow pipe assembly

Abstract

The utility model discloses a multifunctional spill-proof pipe assembly which comprises a spill-proof pipe body, a plug valve, a mud blocking umbrella, a monitoring extension hose, a three-way pipe, a butterfly valve and a barb pipe, the spill-proof pipe body is provided with an inlet end and an outlet end, and the inlet end and the outlet end are respectively provided with a connecting flange; the inlet end is fixedly connected with the conversion pipe which is fixedly connected with the blowout preventer. A monitoring pipe and a grouting pipe which are communicated are arranged on the side wall of the anti-overflow pipe body, and the monitoring pipe is connected with a plug valve; the grouting pipe is connected with an external grouting manifold; a through hole is formed in an umbrella cover of the mud blocking umbrella; the monitoring extension hose penetrates through the through hole to communicate with the plug valve; the bottom side of the middle of the mud blocking umbrella perpendicularly communicates with a connecting pipe, a cover plate is arranged at the end, corresponding to the connecting pipe, of the mud blocking umbrella, and a rod passing hole is formed in the middle of the cover plate. Two opposite ports of the three-way pipe are respectively connected with the outlet end and the connecting pipe, a third port of the three-way pipe is connected with an inlet of the butterfly valve, an outlet of the butterfly valve is connected with the barb pipe, and the barb pipe is communicated with an external discharge pipe.

Description

Technical Field

[0001] The utility model relates to an auxiliary device for drilling, in particular to a multi-functional overflow prevention pipe assembly. Background Art

[0002] During drilling and well repair, a blowout preventer is often set at the wellhead to control the blowout device of high-pressure oil, gas and water. When the oil and gas pressure in the well is very high, the blowout preventer can seal the wellhead (shut it down). When heavy mud is pumped into the drill pipe, there is a four-way under its ram, and the gas-invaded mud can be replaced to increase the pressure of the liquid column in the well to suppress the ejection of high-pressure oil and gas. The overflow prevention pipe is a fitting installed at the top of the blowout preventer. However, with the change of the installation quantity and type of the blowout preventer group, the height of the overflow prevention pipe needs to be changed accordingly, and the connection flange specifications at the upper end of the blowout preventer are diverse, making it inconvenient to connect the overflow prevention pipe. It is necessary to re-cut or weld the flange at the bottom of the overflow prevention pipe. Moreover, the current overflow prevention pipe has a single function and cannot be used in cooperation with a liquid level monitoring instrument to measure the liquid level height in the wellbore.

[0003] The liquid level monitoring technology plays a very important role in preventing well leakage, ensuring well control safety, saving mud, reducing oil layer pollution, etc. during the drilling process, and it is a necessary technical means in the current drilling production process. However, due to the influence of monitoring working conditions such as the long distance between the installation position of the monitoring instrument and the wellbore and the large number of bends that the acoustic wave signal passes through, the monitoring effect is poor. If the accuracy of monitoring the annulus liquid level is to be improved, it is necessary to shut down the well and install the monitoring instrument close to the wellbore. At this time, it will cause double consumption of the choke manifold, kill line manifold, well control equipment and pressure test equipment, and the efficiency is low.

[0004] Therefore, how to provide a multi-functional overflow prevention pipe assembly that can be used in cooperation with a liquid level monitoring instrument with high efficiency is an urgent problem to be solved by those skilled in the art. Content of the Utility Model

[0005] In view of this, the utility model provides a multi-functional overflow prevention pipe assembly, which can be conveniently connected to different types of blowout preventers and is convenient for cooperating with the use of a liquid level monitoring instrument.

[0006] To achieve the above object, the utility model adopts the following technical solution: a multifunctional anti-overflow pipe assembly, including an anti-overflow pipe body, a plug valve, a mud guard umbrella, a monitoring extension hose, a tee, a butterfly valve and a barbed pipe. The anti-overflow pipe body has an inlet end and an outlet end, and connecting flanges are arranged at both the inlet end and the outlet end. The inlet end is fixedly connected to a conversion pipe, and the conversion pipe is fixedly connected to a blowout preventer. A monitoring pipe and a grouting pipe which are communicated are arranged on the side wall of the anti-overflow pipe body, and the plug valve is connected to the monitoring pipe. The grouting pipe is connected to an external grouting manifold. Perforations are arranged on the umbrella cover of the mud guard umbrella. The monitoring extension hose passes through the perforations and is communicated with the plug valve. A connecting pipe is vertically communicated with the bottom side of the middle part of the mud guard umbrella, a cover plate is arranged at the end position of the connecting pipe corresponding to the mud guard umbrella, and a through rod hole is arranged in the middle of the cover plate. The opposite two ports of the tee are respectively fixedly connected to the outlet end and the connecting pipe, the third port of the tee is connected to the inlet of the butterfly valve, the outlet of the butterfly valve is connected to the barbed pipe, and the barbed pipe is communicated with an external discharge pipe.

[0007] The beneficial effects of the utility model are as follows: a monitoring pipe and a grouting pipe which are communicated are arranged on the side wall of the anti-overflow pipe body, the monitoring extension hose is connected to the monitoring pipe, the transmitting gun of the liquid level monitor detects from the port position of the monitoring extension hose, the liquid level height in the well is detected by ultrasonic waves, and since the monitoring extension hose is communicated with the monitoring pipe, the curve that the transmitting gun sound wave passes through is less, which is convenient for detecting the liquid level height in the well through the blowout preventer, the sound wave loss is small, and the monitoring effect is relatively accurate. Grouting is carried out by connecting the external grouting manifold to the grouting pipe, which can further reduce the consumption of well control equipment, control the pressure in the well, prevent blowout and reduce safety risks. The anti-overflow pipe body is connected to different types of blowout preventers through the conversion pipe, and there is no need to cut or weld the connecting flange, and the efficiency is high.

[0008] Preferably, the conversion pipe is a concentric reducer or a concentric equal-diameter pipe, connecting flanges are arranged at both ends of the concentric reducer or the concentric equal-diameter pipe, and the concentric reducer or the concentric equal-diameter pipe is fixedly connected to the blowout preventer through the connecting flanges at its ends.

[0009] Preferably, a plurality of short pipe sections are arranged between the outlet end and the tee, flanges are arranged at both ends of the short pipe sections, and the short pipe sections are respectively fixedly connected to the outlet end and the tee through flanges.

[0010] Preferably, a plurality of short pipe sections are additionally installed between the tee and the mud guard umbrella, and the short pipe sections are respectively fixedly connected to the tee and the connecting pipe through flanges.

[0011] Preferably, loose flanges can be connected to the opposite two ends of the tee.

[0012] Preferably, the axis of the monitoring pipe is inclined relative to the axis of the anti-overflow pipe body.

[0013] Preferably, the axis of the grouting pipe is perpendicular to the axis of the anti-overflow pipe body.

[0014] Preferably, a cock valve is connected between the grouting pipe and an external grouting pipe manifold. Description of the Drawings

[0015] Figure 1 It is the front view of the anti-overflow pipe body of the multi-functional anti-overflow pipe assembly of the present utility model;

[0016] Figure 2 It is the side view of the anti-overflow pipe body of the multi-functional anti-overflow pipe assembly of the present utility model;

[0017] Figure 3 It is the top view of the anti-overflow pipe body of the multi-functional anti-overflow pipe assembly of the present utility model;

[0018] Figure 4 It is the front view of the mud guard umbrella of the multi-functional anti-overflow pipe assembly of the present utility model;

[0019] Figure 5 It is the top view of the mud guard umbrella of the multi-functional anti-overflow pipe assembly of the present utility model;

[0020] Figure 6 It is the schematic diagram of the cover plate of the multi-functional anti-overflow pipe assembly of the present utility model;

[0021] Figure 7 It is the schematic assembly diagram of Embodiment 1 of the multi-functional anti-overflow pipe assembly of the present utility model;

[0022] Figure 8 It is the schematic assembly diagram of Embodiment 2 of the multi-functional anti-overflow pipe assembly of the present utility model;

[0023] Figure 9 It is the schematic diagram of the overall structure of the multi-functional anti-overflow pipe assembly of the present utility model.

[0024] 1 Anti-overflow pipe body, 101 Inlet end, 102 Outlet end, 2 Cock valve, 3 Mud guard umbrella, 4 Monitoring extension hose, 5 Three-way pipe, 6 Butterfly valve, 7 Barbed pipe, 8 Monitoring pipe, 9 Grouting pipe, 10 Perforation, 11 Short pipe section, 12 Conversion pipe, 13 Connecting pipe, 14 Cover plate. 15 Rod passing hole. Detailed Embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0026] Embodiment 1

[0027] Refer to the attached Figures 1 to 7 According to Embodiment 1 of the present utility model, a multifunctional anti-overflow pipe assembly includes an anti-overflow pipe body 1, a plug valve 2, a mud guard umbrella 3, a monitoring extension hose 4, a tee 5, a butterfly valve 6 and a barbed pipe 7. The anti-overflow pipe body 1 has an inlet end 101 and an outlet end 102, and connecting flanges are provided at both the inlet end 101 and the outlet end 102; the inlet end 101 is connected to a conversion pipe 12, and the conversion pipe 12 is fixedly connected to a blowout preventer; a monitoring pipe 8 and a grouting pipe 9 are provided on the side wall of the anti-overflow pipe body 1, and the monitoring pipe 8 is connected to the plug valve 2; the grouting pipe 9 is connected to an external grouting manifold; a perforation 10 is provided on the umbrella cover of the mud guard umbrella 3; the monitoring extension hose 4 passes through the perforation 10 and communicates with the plug valve 2; a connecting pipe 13 is vertically communicated with the bottom side of the middle part of the mud guard umbrella 3, and a cover plate 14 is provided at the end position of the connecting pipe corresponding to the mud guard umbrella 3, and a rod passing hole 15 is provided in the middle of the cover plate 14; the two opposite ports of the tee 5 are respectively fixedly connected to the outlet end 102 and the connecting pipe 13, the third port of the tee 5 is connected to the inlet of the butterfly valve 6, the outlet of the butterfly valve 6 is connected to the barbed pipe 7, and the barbed pipe 7 communicates with an external discharge pipe. The top surface of the umbrella cover of the mud guard umbrella is concave downward, which can effectively catch the falling objects at the top. The mud guard umbrella can also keep the blowout preventer (well control device) clean and hygienic. A cover plate is installed on the mud guard umbrella, and there is a rod passing hole on the cover plate. The cover plate can scrape the mud on the drill pipe and act as a mud scraper.

[0028] Specifically, the conversion pipe 12 is a concentric equal-diameter pipe, and connecting flanges are provided at both ends of the concentric equal-diameter pipe. The concentric equal-diameter pipe is fixedly connected to the blowout preventer through the connecting flanges at its ends.

[0029] More specifically, the flange specification of the conversion pipe is selected from any one of 35-35, 35-70, 35-105, 28-35, 28-70.

[0030] Even more specifically, a plurality of short pipe sections 11 are provided between the outlet end 102 and the tee 5. Flanges are provided at both ends of the short pipe sections 11, and the short pipe sections 11 are respectively fixedly connected to the outlet end 102 and the tee flange. The setting of the short pipe sections facilitates the adjustment of the overall height.

[0031] Further specifically, a plurality of short pipe sections are added between the tee 5 and the mud guard umbrella 3, and the short pipe sections 11 are respectively fixedly connected to the tee 5 and the connecting pipe flange. It is convenient to adjust the height of the mud guard umbrella to meet the needs of various heights.

[0032] Specifically, loose flanges can be connected to the two opposite ends of the tee 5. The loose flanges facilitate the adjustment of the outlet direction of the tee. The setting of the tee facilitates the discharge and circulation of the drilling fluid.

[0033] More specifically, the axial direction of the monitoring pipe 8 is inclined relative to the axial direction of the anti-overflow pipe body 1. The transmitting gun of the liquid level monitoring instrument is connected to the monitoring extension hose to form a monitoring channel. The inclination of the monitoring pipe at a certain angle facilitates the acoustic wave detection of the liquid level monitor, enabling the acoustic wave signal for monitoring the liquid level to enter the wellbore at the smallest angle and distance, thus avoiding unnecessary energy consumption.

[0034] The axial direction of the grouting pipe 9 is perpendicular to the axial direction of the anti-overflow pipe body 1. The setting of the grouting pipe facilitates grouting by the external grouting manifold when necessary, reducing the consumption of well control equipment (blowout preventer).

[0035] A connecting cock valve is provided between the grouting pipe and the external grouting manifold. The settings of the cover plate, cock valve, and butterfly valve facilitate the formation of a closed space, thereby improving the accuracy of liquid level monitoring.

[0036] Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, except for the use of the conversion pipe. Specifically, the conversion pipe 12 is a concentric reducer. Connecting flanges are provided at both ends of the concentric reducer. The flange diameters at both ends of the concentric reducer are different, and it is fixedly connected to the blowout preventer through the connecting flanges at both ends. The concentric reducer can connect the anti-overflow pipe body and the flange sizes of various blowout preventers on the wellhead.

[0038] The multi-functional anti-overflow pipe assembly of the present utility model is convenient to use. When the remote control transmitting gun fails, the monitoring extension hose is connected to the monitoring pipe orifice and the detection head is led to the drill floor, and a manual monitoring instrument can be used to monitor the liquid level.

[0039] The multi-functional anti-overflow pipe assembly of the present utility model can effectively solve the liquid level monitoring operation under various working conditions without shutting in the well and without changing the well control device. Moreover, due to the combined action of the cock valve, butterfly valve, and cover plate, the annulus or wellbore is blocked, thereby improving the accuracy of the monitoring operation, preventing the occurrence of safety accidents, and saving the drilling cost.

[0040] Regarding the device and usage method disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple. For related parts, refer to the description in the method section.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model. Therefore, the present utility model will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. Multifunctional anti-overflow pipe assembly, characterized in that: The anti-overflow pipe body (1) comprises a plug valve (2), a mud guard (3), a monitoring extension hose (4), a three-way pipe (5), a butterfly valve (6) and a barbed pipe (7). The anti-overflow pipe body (1) comprises an inlet end (101) and an outlet end (102), and the inlet end (101) and the outlet end (102) are both provided with connecting flanges; the inlet end (101) is connected to a conversion pipe (12), and the conversion pipe (12) is fixedly connected to a blowout preventer; the side wall of the anti-overflow pipe body (1) is provided with a monitoring pipe (8) and a grouting pipe (9) which are connected; the plug valve (2) is connected to the monitoring pipe (8); and the grouting pipe (9) is connected to an external grouting manifold; The umbrella cover of the mud guard umbrella (3) is provided with a through hole (10); the monitoring extension hose (4) passes through the through hole (10) and is connected to the stopcock (2); the middle bottom side of the mud guard umbrella (3) is vertically connected with a connecting pipe (13), and a cover plate (14) is provided on the mud guard umbrella (3) at a position corresponding to the end of the connecting pipe, and a rod hole (15) is provided in the middle of the cover plate (14); the two opposite ports of the three-way pipe (5) are respectively fixedly connected to the outlet end (102) and the connecting pipe (13), the third port of the three-way pipe (5) is connected to the inlet of the butterfly valve (6), the outlet of the butterfly valve (6) is connected to the barbed pipe (7), and the barbed pipe (7) is connected to the external discharge pipe.

2. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: The conversion pipe (12) is a concentric reducer or a concentric equal-diameter pipe, both ends of which are provided with connecting flanges, and the concentric reducer or the concentric equal-diameter pipe is fixedly connected to the blowout preventer via the connecting flanges at the ends thereof.

3. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: A plurality of short pipe sections (11) are provided between the outlet end (102) and the three-way pipe (5), flanges are provided at both ends of the short pipe sections (11), and the short pipe sections (11) are fixedly connected to the outlet end (102) and the three-way pipe flanges respectively.

4. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: A plurality of short pipe sections are installed between the three-way pipe (5) and the mud guard umbrella (3), and the short pipe sections (11) are fixedly connected to the three-way pipe (5) and the connecting pipe flange respectively.

5. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: The two oppositely disposed ends of the three-way pipe (5) can be connected to loose flanges.

6. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: The axial direction of the monitoring tube (8) is arranged to be inclined relative to the axial direction of the overflow prevention tube body (1).

7. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: The axial direction of the grouting pipe (9) is perpendicular to the axial direction of the overflow prevention pipe body (1).

8. The multifunctional anti-overflow pipe assembly according to claim 1, characterized in that: The plug valve (2) is connected between the grouting pipe (9) and the external grouting manifold.

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