Wellhead safety device for oil and gas production

Abstract

The utility model discloses a kind of wellhead safety devices for oil production and gas production, including thermal recovery wellhead device, mounting base and flow divider tank, thermal recovery wellhead device is installed on mounting base, mounting base is installed at wellhead, the outer peripheral wall of thermal recovery wellhead device is communicated with communicating pipe, communicating pipe is communicated with flow divider tank, connection unit is provided in flow divider tank, when pressure fluctuation occurs when carrying out oil production and gas production, oil and gas in thermal recovery wellhead device enter into flow divider tank by communicating pipe, excessive oil and gas pressure is moderated, when the valve connected on oil pipe passage is closed, wellhead pressure peak exceeds normal range, oil and gas pressure promotes sliding plate to move, so that sliding plate drives connecting pipe to move along pressure reducing pipe, oil and gas enter into pressure reducing pipe by liquid inlet hole, then enter into thermal recovery wellhead device by circulating pipe circulation, oil and gas are separated, share the pressure of oil and gas, avoid the impact on oil pipe passage.

Description

Technical Field

[0001] This utility model relates to the field of oil and gas wellhead technology, specifically to a wellhead safety device for oil and gas production. Background Technology

[0002] The wellhead, a key piece of equipment connecting the wellbore to the surface, mainly consists of the casing head, tubing head, and Christmas tree. Its functions include suspending the casing / tubing, sealing the annular space, and controlling oil and gas production.

[0003] During oil and gas production, valves are used to control the delivery of oil and gas. Pressure fluctuations occur in the well during production, which can impact the pipeline and cause damage over time. Furthermore, closing the valves can trigger pressure waves, causing the wellhead pressure peak to exceed the normal range, further impacting the pipeline and affecting its service life. Therefore, we propose a wellhead safety device for oil and gas production. Utility Model Content

[0004] The purpose of this utility model is to provide a wellhead safety device for oil and gas production to solve the problems mentioned in the background art.

[0005] A wellhead safety device for oil and gas production includes a thermal recovery wellhead device, a mounting base, and a distribution tank. The thermal recovery wellhead device is mounted on the mounting base, which is installed at the wellhead. A connecting pipe is connected to the outer peripheral wall of the thermal recovery wellhead device, and the connecting pipe is connected to the distribution tank. A connecting unit is provided in the distribution tank. The connecting unit includes a sliding plate, a connecting pipe, and a pressure-reducing pipe. The sliding plate is slidably connected in the distribution tank, the pressure-reducing pipe is fixedly installed in the distribution tank, and the connecting pipe is slidably connected to the outer peripheral wall of the pressure-reducing pipe. An inlet hole is provided on the pressure-reducing pipe, and a drain pipe is provided on the outer peripheral wall of the distribution tank.

[0006] Preferably, the thermal recovery wellhead device is provided with an oil pipe channel and a side wing pipe, and valves are installed at the ends of the oil pipe channel and the side wing pipe.

[0007] Preferably, a sliding rod is fixedly connected to the top end face of the sliding plate, and the sliding rod is slidably connected in the drain pipe.

[0008] Preferably, the drain pipe is provided with a damper and a mounting bracket, the damper is installed in the mounting bracket, and the output end of the damper is fixedly connected to the top of the sliding rod.

[0009] Preferably, the drain pipe is provided with a circulation pipe, one end of which is connected to the pressure reducing pipe and the other end of which is connected to the oil pipe channel.

[0010] Preferably, a sealing mechanism is provided at the contact point between the sliding plate and the diversion tank.

[0011] Preferably, a sealing mechanism is provided between the sliding rod and the drain pipe.

[0012] By adopting the above technical solution, when instantaneous well shut-in causes a pressure wave impact, resulting in the wellhead pressure peak exceeding the normal range, the oil and gas pressure enters the diversion tank to separate the oil and gas, share the pressure of the oil and gas, and avoid impact on the pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are: this wellhead safety device for oil and gas production,

[0014] When pressure fluctuations occur during oil and gas production, the oil and gas in the thermal recovery wellhead device enter the diversion tank through the connecting pipe to alleviate excessive oil and gas pressure and effectively avoid pressure shocks to the oil pipeline channel.

[0015] When it is necessary to stop oil and gas production, closing the valve connected to the tubing channel and instantly shutting in the well will trigger a pressure wave impact, causing the peak pressure at the wellhead to exceed the normal range. The oil and gas pressure pushes the sliding plate to move, which in turn moves the connecting pipe along the pressure reducing pipe. The oil and gas enter the pressure reducing pipe through the inlet hole, and then circulate through the circulation pipe into the thermal recovery wellhead device to separate the oil and gas, share the pressure of the oil and gas, and avoid impacting the tubing channel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the thermal recovery wellhead device of this utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the diversion tank of this utility model.

[0019] In the diagram: 1. Thermal recovery wellhead device; 11. Tubing channel; 12. Side wing pipe; 13. Connecting pipe; 2. Mounting base; 3. Diverter tank; 31. Drain pipe; 4. Connecting unit; 41. Sliding plate; 42. Connecting pipe; 43. Pressure reducing pipe; 44. Sliding rod; 45. Inlet hole; 5. Damper; 51. Mounting bracket; 6. Circulation pipe. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-3 This utility model provides a technical solution: a wellhead safety device for oil and gas production, including a thermal recovery wellhead device 1, a mounting base 2, and a diversion tank 3. The thermal recovery wellhead device 1 is mounted on the mounting base 2, and the mounting base 2 is mounted at the wellhead. The outer peripheral wall of the thermal recovery wellhead device 1 is connected to a connecting pipe 13, which is connected to the diversion tank 3. The diversion tank 3 is provided with a connecting unit 4, which includes a sliding plate 41, a connecting pipe 42, and a pressure reducing pipe 43. The sliding plate 41 is slidably connected in the diversion tank 3, the pressure reducing pipe 43 is fixedly installed in the diversion tank 3, and the connecting pipe 42 is slidably connected to the outer peripheral wall of the pressure reducing pipe 43. The pressure reducing pipe 43 is provided with an inlet hole 45, and the outer peripheral wall of the diversion tank 3 is provided with a drain pipe 31.

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-3 This utility model provides a technical solution: a wellhead safety device for oil and gas production, including a thermal recovery wellhead device 1, a mounting base 2, and a diversion tank 3. The thermal recovery wellhead device 1 is mounted on the mounting base 2, and the mounting base 2 is mounted at the wellhead. The outer peripheral wall of the thermal recovery wellhead device 1 is connected to a connecting pipe 13, which is connected to the diversion tank 3. The diversion tank 3 is provided with a connecting unit 4, which includes a sliding plate 41, a connecting pipe 42, and a pressure reducing pipe 43. The sliding plate 41 is slidably connected in the diversion tank 3, the pressure reducing pipe 43 is fixedly installed in the diversion tank 3, and the connecting pipe 42 is slidably connected to the outer peripheral wall of the pressure reducing pipe 43. The pressure reducing pipe 43 is provided with an inlet hole 45, and the outer peripheral wall of the diversion tank 3 is provided with a drain pipe 31.

[0024] When oil and gas are produced through the wellhead, the thermal wellhead device 1 is equipped with a four-way structure. At this time, oil and gas are diverted to the oil pipe channel 11 through the four-way structure. When pressure fluctuations occur during oil and gas production, the oil and gas in the thermal wellhead device 1 enter the diversion tank 3 through the connecting pipe 13 to alleviate the excessive oil and gas pressure and effectively avoid pressure shock to the oil pipe channel 11.

[0025] When the sliding plate 41 drives the connecting pipe 42 to move upward, the liquid inlet 45 on the pressure reducing pipe 43 is connected to the connecting pipe 13 in the diversion tank 3. At this time, oil and gas enter the pressure reducing pipe 43 through the liquid inlet 45, and then enter the oil pipe channel 11 through the circulation pipe 6 for oil and gas transportation.

[0026] When it is necessary to stop oil and gas production, the valve connected to the tubing channel 11 is closed. At this time, the instantaneous well shut-in will trigger a pressure wave impact, causing the wellhead pressure peak to exceed the normal range. At this time, the oil and gas pressure pushes the sliding plate 41 to move, so that the sliding plate 41 drives the connecting pipe 42 to move along the pressure reducing pipe 43. At this time, the oil and gas enter the pressure reducing pipe 43 through the liquid inlet 45, and then circulate into the thermal recovery wellhead device 1 through the circulation pipe 6 to separate the oil and gas, share the pressure of the oil and gas, and avoid impact on the tubing channel 11.

[0027] When the pressure is too high, the sliding plate 41 continues to move, so that the sliding plate 41 is above the drain pipe 31. At this time, the drain pipe 31 is connected to the connecting pipe 13 through the diversion tank 3, so that excess oil and gas can be collected through the drain pipe 31. When the pressure is balanced, the sliding plate 41 returns to the initial position.

[0028] The thermal recovery wellhead device 1 is equipped with an oil pipe channel 11 and a side wing pipe 12, and valves are installed at the ends of the oil pipe channel 11 and the side wing pipe 12.

[0029] The valve on the tubing channel 11 is the main valve. As the core control component, it directly regulates the opening / closing of the tubing channel 11 and determines the total flow rate of oil and gas from the wellbore to the surface.

[0030] The valve on the side wing pipe 12 is a wing valve, which diverts fluid through the side wing pipe 12 line, supporting multi-directional flow control, such as in production, testing, or injection operations.

[0031] A sliding rod 44 is fixedly connected to the top end face of the sliding plate 41, and the sliding rod 44 is slidably connected in the drain pipe 31.

[0032] When the sliding plate 41 slides in the diversion tank 3, the sliding plate 41 drives the sliding rod 44 to move upward.

[0033] A damper 5 and a mounting bracket 51 are provided on the drain pipe 31. The damper 5 is installed in the mounting bracket 51, and the output end of the damper 5 is fixedly connected to the top of the sliding rod 44.

[0034] The damper 5 is used to reduce the impact speed of the sliding plate 41. At the same time, when the oil and gas pressure in the diversion tank 3 is balanced, the sliding plate 41 returns to the initial position under the action of the damper 5.

[0035] A circulation pipe 6 is provided on the drain pipe 31. One end of the circulation pipe 6 is connected to the pressure reducing pipe 43, and the other end of the circulation pipe 6 is connected to the oil pipe channel 11.

[0036] When oil and gas enter the pressure reducing pipe 43 through the inlet hole 45, the pressure reducing pipe 43 enters the oil pipe channel 11 through the circulation pipe 6, which facilitates the transportation or return of oil and gas.

[0037] A sealing mechanism is provided at the contact point between the sliding plate 41 and the diversion tank 3. The sealing mechanism can be equipped with a sealing ring to ensure the sealing between the sliding plate 41 and the diversion tank 3.

[0038] A sealing mechanism is provided between the sliding rod 44 and the drain pipe 31. The sealing mechanism is set as a sealing ring or oil seal to ensure the sealing performance of the diversion tank 3 and the drain pipe 31.

Claims

1. A wellhead safety device for oil and gas production, characterized in that, The device includes a thermal recovery wellhead device (1), a mounting base (2), and a diversion tank (3). The thermal recovery wellhead device (1) is mounted on the mounting base (2), which is installed at the wellhead. The outer peripheral wall of the thermal recovery wellhead device (1) is connected to a connecting pipe (13), which is connected to the diversion tank (3). The diversion tank (3) is provided with a connecting unit (4), which includes a sliding plate (41), a connecting pipe (42), and a pressure reducing pipe (43). The sliding plate (41) is slidably connected in the diversion tank (3), the pressure reducing pipe (43) is fixedly installed in the diversion tank (3), and the connecting pipe (42) is slidably connected to the outer peripheral wall of the pressure reducing pipe (43). The pressure reducing pipe (43) has an inlet hole (45), and the outer peripheral wall of the diversion tank (3) has a drain pipe (31).

2. The wellhead safety device for oil and gas production according to claim 1, characterized in that, The thermal wellhead device (1) is equipped with an oil pipe channel (11) and a side wing pipe (12), and valves are installed at the ends of the oil pipe channel (11) and the side wing pipe (12).

3. The wellhead safety device for oil and gas production according to claim 1, characterized in that, A sliding rod (44) is fixedly connected to the top end face of the sliding plate (41), and the sliding rod (44) is slidably connected in the drain pipe (31).

4. The wellhead safety device for oil and gas production according to claim 1, characterized in that, The drain pipe (31) is provided with a damper (5) and a mounting bracket (51). The damper (5) is installed in the mounting bracket (51), and the output end of the damper (5) is fixedly connected to the top of the sliding rod (44).

5. A wellhead safety device for oil and gas production according to claim 1, characterized in that, The drain pipe (31) is provided with a circulation pipe (6), one end of which is connected to the pressure reducing pipe (43), and the other end of which is connected to the oil pipe channel (11).

6. A wellhead safety device for oil and gas production according to claim 1, characterized in that, A sealing mechanism is provided at the contact point between the sliding plate (41) and the diversion tank (3).

7. A wellhead safety device for oil and gas production according to claim 3, characterized in that, A sealing mechanism is provided between the sliding rod (44) and the drain pipe (31).

Images