Gas-liquid separation device suitable for high-liquid-yield gas well

Abstract

The utility model discloses a gas-liquid separation device suitable for a high-liquid-yield gas well, which comprises an oil pumping unit, the lower end of the oil pumping unit is connected with a gas production tree, the side edge of the gas production tree is provided with a separation tank in a communicated manner, the inner side of the separation tank is provided with a turning mechanism, and the turning mechanism can accelerate gas-liquid separation. A gas outlet pipe is arranged at the top of the separation tank, and a liquid discharge pipe is arranged at the bottom; the hydraulic push rod, the first guide frame and the second guide frame are arranged, and the first guide frame and the second guide frame are hinged to the side wall of the separation tank, so that the first guide frame and the second guide frame are controlled to rotate around a shaft under the action of the hydraulic push rod, and then liquid in the separation tank is turned over; and the gas mixed in the liquid is accelerated to be discharged from the liquid, so that rapid and thorough gas-liquid separation is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of gas-liquid separation in natural gas collection, in particular to a gas-liquid separation device suitable for high-yield liquid gas wells. Background Art

[0002] During the exploitation of natural gas wells, crude oil, formation water and other fluids are brought to the surface from the bottom of the well along with the gas, and enter the gathering and transportation pipeline in the form of gas and liquid. For some high-yield liquid wells, the liquid-to-gas ratio reaches more than 10 cubic meters per 10,000 cubic meters. A large amount of liquid enters the gathering and transportation pipeline, which leads to increased pressure loss and corrosion of the pipeline, and reduced gathering and transportation efficiency. At the same time, it also leads to increased back pressure of the gas well and decreased liquid carrying capacity, which can easily lead to liquid accumulation and flooding in the gas well, affecting the normal production of the gas well. Therefore, it is necessary to set up a gas-liquid separation device at the wellhead of the gas well to separate the natural gas from crude oil, formation water, etc. before entering the gathering and transportation pipeline, which can effectively improve the gathering and transportation efficiency and improve the production status of the gas well.

[0003] Compared with the devices in the prior art: gravity sedimentation type gas-liquid separation device, which uses the weight difference between liquid and gas to achieve separation, has poor separation efficiency, requires a very slow gas flow rate, and has a large corresponding equipment volume; baffle separation type gas-liquid separation device, which uses the different densities of gas and liquid, and the baffle directly collides to achieve separation, has a narrow separation load range, and when the gas flow exceeds a certain range, the separation efficiency decreases; cyclone type gas-liquid separation device, which uses the principle of centrifugal sedimentation to separate fluids of different densities, produces a shearing effect on the fluid, and if the parameters are improperly designed or the fluid properties change, it is easy to cause droplets to break and emulsify, reducing the separation efficiency. The devices or corresponding equipment in the prior art are relatively complex, and the gas-liquid separation is not thorough, which greatly increases the cost of gas production. Utility Model Content

[0004] The utility model aims to provide a gas-liquid separation device suitable for high-yield liquid gas wells, aiming to improve the problems of incomplete gas-liquid separation and low efficiency in the process of natural gas exploitation.

[0005] The utility model is implemented as follows: a gas-liquid separation device suitable for high-yield liquid gas wells includes an oil pumping unit, the lower end of the oil pumping unit is connected to a gas production tree, a separation pool is arranged on the side of the gas production tree, a flipping mechanism is arranged on the inner side of the separation pool, the flipping mechanism can accelerate the gas-liquid separation, an air outlet pipe is arranged on the top of the separation pool, and a liquid discharge pipe is arranged on the bottom.

[0006] Preferably, the flipping mechanism includes a hydraulic push rod, a No. 1 guide frame and a No. 2 guide frame. The No. 1 guide frame and the No. 2 guide frame are respectively hinged to the two opposite side walls of the separation tank. The lower end of the hydraulic push rod is connected to the upper ends of the No. 1 guide frame and the No. 2 guide frame, and can control the No. 1 guide frame and the No. 2 guide frame to rotate around the axis.

[0007] Preferably, the No. 1 guide frame and the No. 2 guide frame are both configured as bending rod structures and are staggered. A No. 1 fixed rod and a No. 2 fixed rod are hingedly provided at the bending parts of the No. 1 guide frame and the No. 2 guide frame, respectively. The No. 1 fixed rod and the No. 2 fixed rod are respectively fixedly connected to the two opposite side walls of the separation tank.

[0008] Preferably, slots are provided at the upper ends of the No. 1 guide frame and the No. 2 guide frame, and the slots are arranged along the length direction of the upper ends of the guide frames. A driving shaft is provided at the lower end of the hydraulic push rod, and the driving shaft passes through the two slots in sequence.

[0009] Preferably, a No. 1 push rod and a No. 2 push rod are respectively provided at the lower ends of the No. 1 guide frame and the No. 2 guide frame, and the No. 1 push rod and the No. 2 push rod are located on a side where the No. 1 guide frame and the No. 2 guide frame are adjacent to each other.

[0010] Preferably, the separation tank is connected to the gas tree through an exhaust pipe, and the exhaust pipe is arranged in the middle and upper part of the separation tank; a No. 2 solenoid valve and a No. 1 solenoid valve are respectively arranged on the exhaust pipe and the liquid discharge pipe.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model is provided with a hydraulic push rod, a No. 1 guide frame and a No. 2 guide frame, and the No. 1 guide frame and the No. 2 guide frame are hingedly arranged on the side wall of the separation tank, so that the No. 1 guide frame and the No. 2 guide frame can be controlled to rotate around the axis under the action of the hydraulic push rod, thereby turning over the liquid inside the separation tank, accelerating the gas mixed in the liquid to be discharged from the liquid, and realizing the rapid and complete separation of gas and liquid.

[0013] 2. The utility model is provided with a No. 1 guide frame and a No. 2 guide frame of a bending structure, so that during the lifting process of the lower end of the hydraulic push rod, the upper and lower ends of the No. 1 guide frame and the No. 2 guide frame are controlled to rotate in opposite directions, and cooperate with the No. 1 push rod and the No. 2 push rod to achieve rapid separation of gas and liquid under the premise of expanding the contact area between the flipping mechanism and the liquid. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model.

[0015] Figure 2 It is a schematic diagram of the internal structure of the separation tank in the utility model.

[0016] Figure 3 It is a schematic diagram of the connection between the hydraulic push rod and the first guide frame and the second guide frame in the utility model.

[0017] In the figure: 1. Pumping unit; 2. Christmas tree; 3. Separation tank; 4. Hydraulic push rod; 5. Fixed rod No. 1; 6. Fixed rod No. 2; 7. Guide frame No. 1; 8. Guide frame No. 2; 9. Exhaust pipe; 10. Push shaft; 11. Slot; 12. Push rod No. 1; 13. Push rod No. 2; 14. Drain pipe; 15. Solenoid valve No. 1; 16. Bushing; 17. Solenoid valve No. 2; 18. Exhaust pipe. DETAILED DESCRIPTION

[0018] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0019] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0020] like Figure 1-Figure 3As shown, this specific embodiment adopts the following technical scheme: it includes an oil pumping unit 1 and a gas tree 2, and a gas tree 2 is arranged on one side of the oil pumping unit 1; it also includes a separation tank 3, a hydraulic push rod 4, a No. 1 fixing rod 5, a No. 2 fixing rod 6, a No. 1 guide frame 7, and a No. 2 guide frame 8. The gas outlet end of the gas tree 2 is connected with the separation tank 3 through an exhaust pipe 18, and an outlet pipe 9 is embedded and fixed on the upper end of the separation tank 3. A No. 2 electromagnetic valve 17 is arranged on the outlet pipe 9, and the gas flow rate in the outlet pipe 9 is controlled by the No. 2 electromagnetic valve 17; the inner top surface of the separation tank 3 is screwed with a screw cap. A hydraulic push rod 4 is fixed, and a push shaft 10 is welded and fixed to the bottom push end of the hydraulic push rod 4. A No. 1 fixed rod 5 and a No. 2 fixed rod 6 are respectively welded and fixed to the inner walls on the left and right sides of the separation tank 3. The No. 1 fixed rod 5 and the No. 2 fixed rod 6 are both arranged on the lower side of the exhaust pipe 18. The right end of the No. 1 fixed rod 5 is rotatably connected to a No. 1 guide frame 7 through a rotating shaft, and the left end of the No. 2 fixed rod 6 is rotatably connected to a No. 2 guide frame 8 through a rotating shaft. The upper ends of the No. 1 guide frame 7 and the No. 2 guide frame 8 are both provided with slots 11. The upper ends of the No. 1 guide frame 7 and the No. 2 guide frame 8 are connected from The push shaft 10 is arranged crosswise from back to front, and is successively inserted into the slots 11 of the No. 1 guide frame 7 and the No. 2 guide frame 8 from back to front. The front end of the push shaft 10 is sleeved and fixed with a shaft sleeve 16, and the shaft sleeve 16 is arranged on the front side of the No. 2 guide frame 8. The push shaft 10 is limited by the shaft sleeve 16 to ensure that the push shaft 10 is always in the slots 11 in the No. 1 guide frame 7 and the No. 2 guide frame 8; Two No. 1 push rods 12 are welded and fixed to the inner side of the lower end of the No. 1 guide frame 7, and two No. 2 push rods 13 are welded and fixed to the inner side of the lower end of the No. 2 guide frame 8. The moving rod 12 and the No. 2 push rod 13 are staggered up and down. By adding a No. 1 push rod 12 to the lower end of the No. 1 guide frame 7 and a No. 2 push rod 13 to the lower end of the No. 2 guide frame 8, when the lower ends of the No. 1 guide frame 7 and the No. 2 guide frame 8 are both rotating, the No. 1 push rod 12 and the No. 2 push rod 13 are also rotated, thereby improving the pushing effect of the No. 1 guide frame 7 and the No. 2 guide frame 8; a drain pipe 14 is embedded and fixed at the bottom of the right side of the separation tank 3, and a No. 1 solenoid valve 15 is provided on the drain pipe 14. The liquid in the separation tank 3 is discharged through the drain pipe 14, and the No. 1 solenoid valve 15 controls the liquid flow rate in the drain pipe 14. The No. 1 solenoid valve 15 and the No. 2 solenoid valve 17 are respectively connected to an external power supply through power lines.

[0021] The working principle of this specific embodiment is as follows: when using the device, the pumping unit 1 is connected to the gas tree 2, so that the gas-liquid mixture enters the exhaust pipe 18 and enters the separation tank 3, and is pushed by the hydraulic push rod 4 to push the push shaft 1 0 moves in the slots 11 in the No. 1 guide frame 7 and the No. 2 guide frame 8. When the hydraulic push rod 4 drives the push shaft 10 to move upward, the push shaft 10 moves upward in the slot 11, so that the position of the intersection of the No. 1 guide frame 7 and the upper end of the No. 2 guide frame 8 changes, so that the No. 1 guide frame 7 rotates around the rotation point of the No. 1 fixed rod 5, and the No. 2 guide frame 8 rotates around the rotation point of the No. 2 fixed rod 6, so that the lower ends of the No. 1 guide frame 7 and the No. 2 guide frame 8 rotate inward, so that the No. 1 push rod 12 and the No. 2 push rod 13 rotate inward. When the hydraulic push rod 4 drives the push shaft 10 to move downward, the push shaft 10 moves downward in the slot, so that the lower ends of the No. 1 guide frame 7 and the No. 2 guide frame 8 rotate outward around their respective rotation points, driving the No. 1 push rod 12 and the No. 2 push rod 13 to rotate inward. 3 rotates outward, thereby fully pushing the gas-liquid mixture in the separation tank 3, so that the liquid is deposited on the inner bottom of the separation tank 3, and the gas flows out from the gas outlet pipe 9 at the upper end, thereby realizing the gas-liquid separation operation.

[0022] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A gas-liquid separation device suitable for high-yield liquid gas wells, characterized in that: The invention comprises an oil pumping unit (1), the lower end of which is connected to a gas tree (2), a separation tank (3) is arranged on the side of the gas tree (2), a flipping mechanism is arranged on the inner side of the separation tank (3), and the flipping mechanism can accelerate the separation of gas and liquid, an air outlet pipe (9) is arranged on the top of the separation tank (3), and a liquid discharge pipe (14) is arranged on the bottom.

2. A gas-liquid separation device suitable for high-yield liquid gas wells according to claim 1, characterized in that: The flipping mechanism comprises a hydraulic push rod (4), a first guide frame (7) and a second guide frame (8); the first guide frame (7) and the second guide frame (8) are respectively hinged to two opposite side walls of the separation tank (3); the lower end of the hydraulic push rod (4) is connected to the upper ends of the first guide frame (7) and the second guide frame (8), and can control the first guide frame (7) and the second guide frame (8) to rotate around the axis.

3. A gas-liquid separation device suitable for high-liquid-yield gas wells according to claim 2, characterized in that: The first guide frame (7) and the second guide frame (8) are both configured as bent rod structures and are staggered in distribution. A first fixing rod (5) and a second fixing rod (6) are respectively hingedly provided at the bent portions of the first guide frame (7) and the second guide frame (8). The first fixing rod (5) and the second fixing rod (6) are respectively fixedly connected to two opposite side walls of the separation tank (3).

4. A gas-liquid separation device suitable for high-liquid-yield gas wells according to claim 3, characterized in that: A slot (11) is provided at the upper end of the first guide frame (7) and the second guide frame (8), and the slot (11) is arranged along the length direction of the upper end of the guide frame. A driving shaft (10) is provided at the lower end of the hydraulic push rod (4), and the driving shaft (10) passes through the two slots (11) in sequence.

5. A gas-liquid separation device suitable for high-liquid-yield gas wells according to claim 4, characterized in that: A first push rod (12) and a second push rod (13) are respectively arranged at the lower ends of the first guide frame (7) and the second guide frame (8); the first push rod (12) and the second push rod (13) are located on a side of the first guide frame (7) and the second guide frame (8) adjacent to each other.

6. The gas-liquid separation device suitable for high-liquid-yield gas wells according to claim 1, characterized in that: The separation tank (3) is connected to the gas tree (2) via an exhaust pipe (18), and the exhaust pipe (18) is arranged in the middle and upper part of the separation tank (3); a second solenoid valve (17) and a first solenoid valve (15) are respectively arranged on the exhaust pipe (18) and the liquid discharge pipe (14).

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