Natural gas desanding device

Abstract

The utility model relates to the technical field of oil and gas field gas production process, in particular to a desanding device for natural gas, which comprises a T-shaped buffer pipe section, a throttling device, a high-pressure desander and a sand collecting device, the T-shaped pipe section comprises a vertical pipe and a transverse pipe, and the end part of the vertical pipe is communicated with the middle part of the transverse pipe; one end of the transverse pipe is connected with the throttling device, and the other end of the transverse pipe is covered with a cover plate; the high-pressure sand remover is provided with a sand discharging pipe section, and the sand discharging pipe section is connected with the throttling device; the sand collecting device is provided with a sand collecting pipe section, and the sand collecting pipe section is connected with the vertical pipe; the throttling device can convert a sand-containing medium from a high-pressure low-speed state into a low-pressure high-speed state, and the sand-containing medium in the low-pressure high-speed state is guided through the transverse pipe, so that gravels impact the cover plate to reduce the speed, and the gravels are prevented from stabbing and leaking a pipeline at the rear end.

Description

Technical Field

[0001] The utility model relates to the technical field of gas production technology in oil and gas fields, in particular to a natural gas desanding device. Background Art

[0002] In the early stage of production of large-volume fracturing wells, the oil and gas medium contains serious sand. Accompanied by high-pressure transportation, the equipment has a high frequency of puncture leakage. In order to purify the formation sand, fracturing sand, cuttings and other solid particles in the bottom hole return fluid and protect the downstream equipment from erosion, the oil and gas wellhead uses a high-pressure desander as a wellhead sand removal device; however, when the sand discharge pipe of the high-pressure desander is discharging sand, the pipeline pressure is high and the sand and gravel flow rate is too fast, which frequently causes pipeline puncture leakage. Utility Model Content

[0003] The utility model aims to overcome the disadvantages of frequent puncture and leakage of pipelines when high-pressure desanders are discharging sand in the prior art, and to provide a natural gas desander device.

[0004] In a first aspect, the utility model provides a natural gas desanding device, comprising:

[0005] A T-shaped buffer pipe section, wherein the T-shaped pipe section comprises a vertical pipe and a horizontal pipe, and an end of the vertical pipe is connected to a middle portion of the horizontal pipe;

[0006] A throttling device, one end of the transverse pipe is connected to the throttling device, and the other end is covered with a cover plate;

[0007] A high-pressure desander, wherein the high-pressure desander is provided with a sand discharge pipe section, and the sand discharge pipe section is connected to the throttling device;

[0008] A sand collecting device is provided with a sand collecting pipe section, and the sand collecting pipe section is connected to the vertical pipe.

[0009] The utility model discloses a natural gas desanding device. A sand-containing medium is discharged from a high-pressure desander into a sand-discharging pipe section. A throttling device converts the sand-containing medium from a high-pressure and low-speed state into a low-pressure and high-speed state. The sand-containing medium in the low-pressure and high-speed state enters a horizontal pipe and is guided by the horizontal pipe. Sand and gravel impact a cover plate at the end of the horizontal pipe under the action of inertia, thereby slowing down the sand and gravel and discharging the sand and gravel through a vertical pipe, reducing the pressure and speed of the sand-containing medium, thereby avoiding pipeline leakage during sand discharge. The vertical pipe and the horizontal pipe are vertical, thereby avoiding high-speed flowing sand and gravel from entering the sand-collecting pipe section. The cover plate can block the sand and gravel, thereby reducing the speed of the sand and gravel being discharged from the T-shaped buffer pipe section.

[0010] Preferably, it further comprises a pressure measuring device, which is connected to the transverse tube, and the pressure measuring device and the vertical tube are staggered on the transverse tube.

[0011] By setting up a pressure measuring device, the pressure of the sand-containing medium in the horizontal pipe can be read, which is convenient for operators to adjust the throttling device, thereby adjusting the pressure of the medium after throttling; by staggering the pressure measuring device and the vertical pipe, the influence of the discharge of the sand-containing medium on the measurement of the pressure measuring device can be avoided.

[0012] Preferably, the pressure measuring device comprises a meter and a pressure nipple, the cross pipe is connected to the pressure nipple, and the pressure nipple is connected to the meter.

[0013] The setting of the pressure sampling nipple can prevent the sand and gravel from hitting the meter.

[0014] Preferably, the metering meter is provided with a pressure-taking valve, one end of the pressure-taking valve is connected to the pressure-taking nipple, and the other end is connected to the metering meter.

[0015] By closing the pressure valve, the meter can be isolated from the sand-containing medium, making it easier for operators to maintain the meter.

[0016] Preferably, a valve is provided in the sand discharge pipe section, and the sand discharge pipe section is connected with a seamless steel pipe with the same pressure grade as the high-pressure desander to avoid pipe burst in the sand discharge pipe section. The valve is a flat gate valve, and the operator can manually control the timing of sand discharge through the flat gate valve.

[0017] The sand discharge timing of the high-pressure desander can be controlled by the valve, so that the sand discharge process is controlled.

[0018] Preferably, the valve comprises an electronic cut-off valve, and the pressure measuring device is communicatively connected to the electronic cut-off valve.

[0019] The pressure data collected by the pressure measuring device is transmitted to the electronic cut-off valve in real time. When the sand collection pipe section is blocked, the pressure data exceeds the threshold set by the electronic cut-off valve, and the electronic cut-off valve is closed to block the sand discharge process.

[0020] Preferably, the pressure measuring device is provided with a remote communication unit.

[0021] Through the remote communication unit, operators can remotely read the pressure data obtained by the pressure measuring device, reducing the labor intensity of operators and ensuring the safe operation of the device.

[0022] Preferably, the throttling device comprises a plurality of throttling valves, and the plurality of throttling valves are connected in series.

[0023] The discharged sand-containing medium is depressurized by a throttle valve. In actual practice, multi-stage throttling is helpful to ensure production safety.

[0024] Preferably, the throttle valve comprises a fixed throttle valve and an adjustable throttle valve, the fixed throttle valve is connected to the adjustable throttle valve, and the fixed throttle valve is located on the upstream side of the adjustable throttle valve.

[0025] The fixed throttle valve performs preliminary throttling and pressure reduction, while the adjustable throttle valve performs more accurate pressure reduction. The adjustable throttle valve is a cage-type throttle valve, which is prone to puncture leakage. By using the fixed throttle valve to reduce the speed of the sand-containing medium, the cage-type throttle valve can be protected to avoid uncontrolled sand discharge.

[0026] Preferably, the transverse tube is provided with a flange, and the transverse tube is detachably connected to the cover plate via the flange.

[0027] The bolt holes of the flange make it easy to install and disassemble the cover, ensuring the sealing performance of the cover.

[0028] Compared with the prior art, the utility model has the following beneficial effects:

[0029] 1. The utility model is a natural gas desander device, wherein the sand-containing medium is discharged from the high-pressure desander into the sand discharge pipe section, and the throttling device converts the sand-containing medium from a high-pressure and low-speed state into a low-pressure and high-speed state. After the sand-containing medium in the low-pressure and high-speed state enters the horizontal pipe, it is guided by the horizontal pipe, and the sand and gravel impact the cover plate at the end of the horizontal pipe under the action of inertia, thereby slowing down the sand and gravel and being discharged from the vertical pipe, reducing the pressure and speed of the sand-containing medium, thereby avoiding pipeline leakage during sand discharge; the vertical pipe and the horizontal pipe are vertical, which can prevent high-speed flowing sand and gravel from entering the sand collecting pipe section, and the cover plate can block the sand and gravel, thereby reducing the speed of the sand and gravel discharged from the T-shaped buffer pipe section;

[0030] 2. The utility model is a natural gas sand removal device with simple structure, easy manufacturing and convenient use. The throttling device can transform the sand-containing medium from a high-pressure and low-speed state to a low-pressure and high-speed state. The sand-containing medium in the low-pressure and high-speed state is guided by a cross pipe to make the sand and gravel hit the cover plate to reduce the speed, thereby preventing the sand and gravel from piercing the rear-end pipeline. It has good economic value and practical value. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic structural diagram of a natural gas desanding device according to Example 1;

[0032] Figure 2 The present invention is a schematic structural diagram of a natural gas desanding device in one or several implementation modes.

[0033] Markings in the figure:

[0034] 1-T-type buffer pipe section, 11-horizontal pipe, 12-vertical pipe, 2-throttling device, 21-fixed throttle valve, 22-adjustable throttle valve, 3-cover plate, 4-high-pressure desander, 5-sand collecting device, 6-sand discharge pipe section, 7-sand collecting pipe section, 8-pressure measuring device, 81-metering meter, 82-pressure taking valve, 83-pressure taking short joint, 9-valve, 10-remote communication unit. DETAILED DESCRIPTION

[0035] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0036] In the description of the specific embodiments of the present invention, unless otherwise specified, the terms indicating the orientation or position relationship such as "upper", "lower", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or the orientation or position relationship when the product / equipment / device of the utility model is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the utility model or simplifying the description in the specific embodiments, so that technicians can quickly understand the scheme, rather than indicating or implying that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding devices / components / elements are within the error / deviation range, they can still achieve their functions in the solution of the utility model.

[0038] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0039] In addition, in the description of the embodiments of the present invention, "several", "multiple" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0040] In addition, in the description of the technical solution of the utility model, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal communication of two components.

[0041] Example 1

[0042] like Figure 1-Figure 2 As shown, a natural gas desanding device includes a T-shaped buffer pipe section, a throttling device 2, a high-pressure desander 4 and a sand collecting device 5.

[0043] The T-shaped pipe section includes a vertical pipe 12 and a horizontal pipe 11, and the end of the vertical pipe 12 is connected to the middle of the horizontal pipe 11; one end of the horizontal pipe 11 is connected to the throttling device 2, and the other end is covered with a cover plate 3; the high-pressure desander 4 is provided with a sand discharge pipe section 6, and the sand discharge pipe section 6 is connected to the throttling device 2; the sand collecting device 5 is provided with a sand collecting pipe section 7, and the sand collecting pipe section 7 is connected to the vertical pipe 12.

[0044] The sand-containing medium is discharged from the high-pressure desander 4 into the sand discharge pipe section 6. The throttling device 2 converts the sand-containing medium from a high-pressure and low-speed state to a low-pressure and high-speed state. The sand-containing medium in the low-pressure and high-speed state enters the transverse pipe 11 and is guided by the transverse pipe 11. The sand and gravel impact the cover plate 3 at the end of the transverse pipe 11 under the action of inertia, thereby slowing down the sand and gravel and being discharged from the vertical pipe 12, so that the pressure and speed of the sand-containing medium are reduced, thereby avoiding pipeline leakage during sand discharge; the vertical pipe 12 and the transverse pipe 11 are vertical, which can prevent high-speed flowing sand and gravel from entering the sand collecting pipe section 7; the cover plate 3 is an alloy cover, which has better strength and can ensure that the sand and gravel will hit for a long time without leakage, thereby reducing the speed of sand and gravel discharged from the T-type buffer pipe section.

[0045] In one or several embodiments, a natural gas sand removal device also includes a pressure measuring device 8, which is connected to the cross pipe 11. Along the axial direction of the cross pipe 11, the pressure measuring device 8 and the vertical pipe 12 are staggered; the pressure measuring device 8 is located at the top of the cross pipe 11, and the vertical pipe 12 is located at the bottom of the cross pipe 11. Under the action of gravity, sand and gravel can be prevented from colliding with the pressure measuring device 8; by staggering the vertical pipe 12 and the pressure measuring device 8, the influence of the flow of sand-containing media in the vertical pipe 12 on the measurement result is avoided, so that the pressure measuring device 8 can obtain more accurate pressure data.

[0046] In an optional embodiment, the pressure measuring device 8 is composed of a metering meter 81 and a pressure nipple 83, the cross pipe 11 is connected to the pressure nipple 83, and the pressure nipple 83 is connected to the metering meter 81; transition is made through the pressure nipple 83 to further prevent sand and gravel from contacting the metering meter 81.

[0047] In an optional embodiment, a pressure-taking valve 82 is provided at the metering meter 81, one end of the pressure-taking valve 82 is connected to the pressure-taking short section 83, and the other end is connected to the metering meter 81; when the pressure-taking valve 82 is closed, the metering meter 81 is isolated from the cross pipe 11, thereby facilitating the maintenance or replacement of the metering meter 81 by the operating personnel; one end of the pressure-taking valve 82 is connected to the pressure-taking short section 83, and the other end is connected to the metering meter 81. When the pressure-taking valve 82 is opened, the metering meter 81 and the cross pipe 11 are connected, so that the metering meter 81 can measure the pressure data of the cross pipe 11.

[0048] In one or several embodiments, the throttling device 2 is composed of two throttle valves, which are a fixed throttle valve 21 and an adjustable throttle valve 22 respectively. The adjustable throttle valve 22 is a cage-type throttle valve. The fixed throttle valve 21 and the adjustable throttle valve 22 are connected in series, and the fixed throttle valve 21 is located on the upstream side of the adjustable throttle valve 22; multi-stage throttling is conducive to ensuring production safety. The adjustable throttle valve 22 is a cage-type throttle valve, which is prone to puncture leakage. Arranging a fixed throttle valve 21 upstream thereof can protect the cage-type throttle valve, thereby avoiding uncontrolled sand discharge.

[0049] In one or several embodiments, a flange is provided on the transverse tube 11, and the transverse tube 11 is detachably connected to the cover plate 3 via the flange; by providing the flange, the cover plate 3 is easier to install and remove.

[0050] In one or several embodiments, a valve 9 is provided in the sand discharge pipe section 6. The sand discharge process can be controlled by controlling the valve 9. The valve 9 is a flat gate valve, and the operator can manually control the timing of sand discharge. The sand discharge pipe section 6 is a seamless steel pipe.

[0051] In an optional embodiment, valve 9 is an electronic shut-off valve, and the pressure measuring device 8 is communicatively connected to the electronic shut-off valve; the pressure data collected by the pressure measuring device is transmitted to the electronic shut-off valve in real time. When the sand collection pipe section 7 is blocked, the pressure data exceeds the threshold set by the electronic shut-off valve, and the electronic shut-off valve is closed to block the sand discharge process; the pressure measuring device 8 outputs the pressure signal as a current signal, and the electronic shut-off valve judges the size of the pressure data by the size of the current signal.

[0052] like Figure 2As shown, in one or several embodiments, the pressure measuring device 8 is provided with a remote communication unit 10; through the remote communication unit 10, the operator can remotely read the pressure data obtained by the pressure measuring device 8, thereby reducing the labor intensity of the operator and ensuring the safe operation of the device.

[0053] In a natural gas sand removal device of the present embodiment, the throttling device 2 can transform the sand-containing medium from a high-pressure and low-speed state to a low-pressure and high-speed state. The sand-containing medium in the low-pressure and high-speed state is guided through the cross pipe 11, so that the sand and gravel hit the alloy cover to reduce the speed, thereby preventing the sand and gravel from piercing the rear-end pipeline.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A natural gas desanding device, characterized in that: include A T-shaped buffer pipe section (1), the T-shaped buffer pipe section (1) comprising a vertical pipe (12) and a horizontal pipe (11), the end of the vertical pipe (12) being connected to the middle of the horizontal pipe (11); A throttling device (2), wherein one end of the transverse pipe (11) is connected to the throttling device (2) and the other end is covered with a cover plate (3); A high-pressure desander (4), wherein the high-pressure desander (4) is provided with a sand discharge pipe section (6), and the sand discharge pipe section (6) is connected to the throttling device (2); A sand collecting device (5), wherein the sand collecting device (5) is provided with a sand collecting pipe section (7), and the sand collecting pipe section (7) is connected to the vertical pipe (12).

2. A natural gas desanding device according to claim 1, characterized in that: It also comprises a pressure measuring device (8), the pressure measuring device (8) being connected to the transverse tube (11), and the pressure measuring device (8) and the vertical tube (12) being arranged on the transverse tube (11) in a staggered manner.

3. A natural gas desanding device according to claim 2, characterized in that: The pressure measuring device (8) comprises a metering meter (81) and a pressure taking nipple (83); the transverse pipe (11) is connected to the pressure taking nipple (83); and the pressure taking nipple (83) is connected to the metering meter (81).

4. A natural gas desanding device according to claim 3, characterized in that: The metering meter (81) is provided with a pressure-taking valve (82), one end of the pressure-taking valve (82) is connected to the pressure-taking nipple (83), and the other end is connected to the metering meter (81).

5. A natural gas desanding device according to claim 2, characterized in that: The sand discharge pipe section (6) is provided with a valve (9).

6. A natural gas desanding device according to claim 5, characterized in that: The valve (9) comprises an electronic cut-off valve, and the pressure measuring device (8) is communicatively connected to the electronic cut-off valve.

7. A natural gas desanding device according to claim 2, characterized in that: The pressure measuring device (8) is provided with a remote communication unit (10).

8. A natural gas desanding device according to claim 1, characterized in that: The throttling device (2) comprises a plurality of throttling valves, and the plurality of throttling valves are connected in series.

9. A natural gas desanding device according to claim 8, characterized in that: The throttle valve comprises a fixed throttle valve (21) and an adjustable throttle valve (22), the fixed throttle valve (21) being connected to the adjustable throttle valve (22), and the fixed throttle valve (21) being located on the upstream side of the adjustable throttle valve (22).

10. A natural gas desanding device according to any one of claims 1 to 9, characterized in that: The transverse tube (11) is provided with a flange, and the transverse tube (11) is detachably connected to the cover plate (3) via the flange.

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