Directional drilling field gas extraction pipeline optimization system

Abstract

The utility model relates to the technical field of gas extraction, specifically relates to a directional drilling field gas extraction pipeline optimization system, mainly solves the online measurement device measurement error of existing directional drilling field gas extraction pipeline is bigger and the technical problem of data distortion. The system includes extraction pipeline, adapter tee, measuring pipeline, online measurement device, connecting pipeline and negative pressure branch pipe, through the position of adapter tee changes to with the drill site chamber to form the installation area, then sets up measuring pipeline to install online measurement device in the installation area, since the installation area is located in the roadway, and the space is sufficient, so can satisfy 'front 7 back 4 times pipe diameter' straight section installation condition, thereby can reduce the measurement error of online measurement device, simultaneously, can eliminate the measurement data distortion caused by airflow interference to the downstream of online measurement device.

Description

Technical Field

[0001] This utility model relates to the field of gas extraction technology, and in particular to an optimization system for gas extraction pipelines in directional drilling sites. Background Technology

[0002] During directional drilling operations, online measuring devices must be installed to measure parameters such as gas concentration and flow rate in the borehole in real time.

[0003] In existing technologies, such as Figure 1 As shown, the extraction pipeline is arranged along the roadway 200, and a transition tee 2 is provided at the junction of the roadway 200 and the drilling chamber 100. The transition tee 2 is connected to a measuring pipeline 3 that extends into the drilling chamber 100 and connects to the borehole. The online measuring device 4 is installed in the measuring pipeline 3, and the blowout preventer 400 is also connected to the measuring pipeline 3 through a negative pressure branch pipe 6 and is located upstream of the online measuring device 4. This layout has the following drawbacks: First, due to the size of the drilling chamber 100, the online measuring device 4 cannot meet the relevant regulations for installation in a straight section of "7 times the pipe diameter before and 4 times the pipe diameter after", resulting in a large measurement error; Second, the blowout preventer 400 and the online measuring device 4 share a negative pressure interface, which is prone to airflow interference and causes distortion of measurement data.

[0004] Therefore, there is an urgent need for a directional drilling gas extraction pipeline with a small measurement error and accurate data from an online measurement device. Utility Model Content

[0005] To overcome the technical defects of existing directional drilling gas extraction pipelines, such as large measurement errors and data distortion in online measurement devices, this utility model provides an optimization system for directional drilling gas extraction pipelines.

[0006] The directional drilling gas extraction pipeline optimization system provided by this utility model includes an extraction pipeline and further includes:

[0007] A transition tee is connected in series in the extraction pipeline and separated from the drilling chamber to form an installation area between the transition tee and the drilling chamber;

[0008] A measuring pipe is located within the installation area and parallel to the extraction pipe, with one end connected to the transition tee and the other end extending to the drilling chamber.

[0009] An online measuring device is installed in the measuring pipeline;

[0010] A connecting pipe is located inside the drilling chamber, one end of which is connected to a measuring pipe and the other end is connected to the borehole;

[0011] A negative pressure branch pipe, one end of which is connected to the negative pressure interface of the blowout preventer and the other end of which is connected to the measuring pipe, is connected downstream of the online measuring device.

[0012] Optionally, the measuring pipe is also equipped with an ultrasonic flow meter and a vortex flow meter, and the ultrasonic flow meter and the vortex flow meter are located on the front and rear sides of the online measuring device, respectively.

[0013] Optionally, a pneumatic butterfly valve and a pressure sensor are installed on the negative pressure branch pipe. The pneumatic butterfly valve is communicatively connected to a controller for remote control, and the pressure sensor is electrically connected to an audible and visual alarm.

[0014] The technical solution provided by this utility model has the following advantages compared with the prior art:

[0015] The directional drilling gas extraction pipeline optimization system provided by this utility model changes the position of the transition tee to a location separated from the drilling chamber to form an installation area. Then, a measuring pipe is set in this installation area to install an online measuring device. Since the installation area is located in the roadway and has sufficient space, it can meet the installation condition of "7 times the pipe diameter before and 4 times the pipe diameter after" in a straight section, thereby reducing the measurement error of the online measuring device. At the same time, leading the negative pressure branch pipe to the downstream of the online measuring device can eliminate the measurement data distortion caused by airflow interference. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the description, serve to explain the principles of the present invention.

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This diagram shows the layout of gas extraction pipelines in existing directional drilling sites.

[0019] Figure 2 This diagram shows the layout of the directional drilling gas extraction pipeline optimization system in this embodiment of the present invention.

[0020] In the picture:

[0021] 1. Extraction pipeline; 2. Adapter tee; 3. Measuring pipeline; 4. Online measuring device; 5. Connecting pipeline; 6. Negative pressure branch pipe; 7. Ultrasonic flow meter; 8. Vortex flow meter; 9. Pneumatic butterfly valve; 10. Pressure sensor; 11. Audible and visual alarm;

[0022] 100. Drilling chamber; 200. Tunnel; 300. Installation area; 400. Blowout preventer; 500. Drilling rig. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the solution of this utility model will be further described below. It should be noted that, unless otherwise specified, the embodiments of this utility model and the features thereof can be combined with each other.

[0024] In this description, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only some embodiments of the present invention, and not all embodiments.

[0026] The following is combined Figure 2 The specific embodiments of this utility model will be described in detail below.

[0027] This embodiment provides a directional drilling site gas extraction pipeline optimization system, including an extraction pipeline 1, a transition tee 2, a measuring pipeline 3, an online measuring device 4, a connecting pipeline 5, and a negative pressure branch pipe 6.

[0028] The extraction pipeline 1 is arranged along the length of the roadway 200. A negative pressure environment is formed inside the extraction pipeline 1 to extract the gas generated during the drilling process.

[0029] The transition tee 2 is connected in series in the extraction pipeline 1 and is separated from the drilling chamber 100 to form an installation area 300 between the transition tee 2 and the drilling chamber 100.

[0030] It should be noted that the transition tee 2 is an existing structure. This application only changes its position, moving it from the junction of the roadway 200 and the drilling chamber 100 to a location separated from the drilling chamber 100, so that an installation area 300 can be formed between the transition tee 2 and the drilling chamber 100. The installation area 300 is used to install the measuring pipe 3.

[0031] Specifically, the transition tee 2 is at least 8m away from the drilling chamber 100 and is connected to the extraction pipeline 1 via a detachable quick connector.

[0032] The measuring pipe 3 is located within the installation area 300 and is parallel to the extraction pipe 1. One end of the measuring pipe 3 is connected to the transition tee 2 and the other end extends to the drilling chamber 100.

[0033] Specifically, measuring pipe 3 is a high-strength metal corrugated pipe with a length of 10m, which can withstand pressures of over 0.5MPa to ensure the airtightness of the pipeline.

[0034] The online measuring device 4 is installed in the measuring pipe 3.

[0035] It should be noted that the online measuring device 4 is used to measure one or more of the concentration, pressure, and flow rate of gas. It is an existing mature structure and will not be described in detail here.

[0036] It is easy to understand that the core power generation point of this scheme is the innovative design of the position of the measuring pipe 3, which allows the online measuring device 4 to be installed in the measuring pipe 3 located in the tunnel 200. Due to the ample space in the tunnel, it is more conducive to meeting the installation conditions of "7 times the pipe diameter before and 4 times the pipe diameter after" in a straight section, thereby reducing the measurement error of the online measuring device 4.

[0037] Furthermore, the measuring pipe 3 is also equipped with an ultrasonic flow meter 7 and a vortex flow meter 8, which are located on the front and rear sides of the online measuring device 4, respectively. The ultrasonic flow meter 7 has an accuracy of ±1%, and the vortex flow meter 8 has a range ratio of 10:1. Placing them on the front and rear sides of the online measuring device 4 respectively can balance high accuracy and wide range of flow measurement, and the accuracy of measurement can also be improved through data comparison.

[0038] The connecting pipe 5 is located inside the drilling chamber 100, with one end connected to the measuring pipe 3 and the other end connected to the borehole.

[0039] It should be noted that the connecting pipe 5 is located in the same position as the measuring pipe 3 in the prior art, both being located inside the drilling chamber 100, but their functions are different. The connecting pipe 5 is used to connect the measuring pipe 3 to the borehole so that the gas generated by the borehole can be diverted through the online measuring device 4.

[0040] One end of the negative pressure branch pipe 6 is connected to the negative pressure interface of the blowout preventer 400 and the other end is connected to the measuring pipe 3. The negative pressure branch pipe 6 is connected downstream of the online measuring device 4.

[0041] Specifically, a pneumatic butterfly valve 9 and a pressure sensor 10 are installed on the negative pressure branch pipe 6. The pneumatic butterfly valve 9 is connected to a controller for remote control, and the pressure sensor 10 is electrically connected to an audible and visual alarm 11. The controller can remotely control the opening and closing status of the pneumatic butterfly valve 9; when the pressure sensor 10 detects an abnormal pressure in real time, it will trigger the audible and visual alarm 11 to sound an alarm, reminding the operator to perform emergency operations.

[0042] The working principle of the directional drilling gas extraction pipeline optimization system in this embodiment is as follows:

[0043] During drilling, under the negative pressure of the extraction pipeline 1, the borehole gas is extracted in two streams: one stream enters the blowout preventer 400, then enters the measuring pipeline 3 through the negative pressure branch pipe 6, and finally enters the extraction pipeline 1; the other stream enters the measuring pipeline 3 directly through the connecting pipeline 5, and then enters the extraction pipeline 1 after passing through the online measuring device 4.

[0044] The above description is merely a specific embodiment of this utility model, enabling those skilled in the art to understand or implement it. Although detailed descriptions have been provided with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments, and all should be covered by the protection scope of the claims.

Claims

1. A directional drilling site gas extraction pipeline optimization system, comprising an extraction pipeline (1), characterized in that, Also includes: A transition tee (2) is connected in series in the extraction pipeline (1) and separated from the drilling chamber (100) to form an installation area (300) between the transition tee (2) and the drilling chamber (100). A measuring pipe (3) is located in the installation area (300) and parallel to the extraction pipe (1). One end of the measuring pipe (3) is connected to the transition tee (2) and the other end extends to the drilling chamber (100). An online measuring device (4) is installed in the measuring pipe (3); A connecting pipe (5) is located inside the drilling chamber (100), one end of which is connected to the measuring pipe (3) and the other end is connected to the borehole; The negative pressure branch pipe (6) has one end connected to the negative pressure interface of the blowout preventer (400) and the other end connected to the measuring pipe (3). The negative pressure branch pipe (6) is connected downstream of the online measuring device (4).

2. The directional drilling gas extraction pipeline optimization system according to claim 1, characterized in that, The measuring pipe (3) is also equipped with an ultrasonic flow meter (7) and a vortex flow meter (8), and the ultrasonic flow meter (7) and the vortex flow meter (8) are located on the front and rear sides of the online measuring device (4), respectively.

3. The directional drilling gas extraction pipeline optimization system according to claim 1 or 2, characterized in that, A pneumatic butterfly valve (9) and a pressure sensor (10) are installed on the negative pressure branch pipe (6). The pneumatic butterfly valve (9) is connected to a controller for remote control. The pressure sensor (10) is electrically connected to an audible and visual alarm (11).

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