Oil production wellhead

Abstract

The present application relates to a kind of oil production wellhead device, including connector, still including adjustment unit, conveying unit, pressure relief unit and pressure guide piece;The top of connector is fixedly installed with adjustment unit, one side of adjustment unit is fixedly installed with conveying unit, the other end of adjustment unit is fixedly installed with pressure relief unit, adjustment unit, including fixedly installed in the top of connector installation component, and adjustment component is slidably installed in the inside of installation component;Pressure relief unit, including fixedly installed in the one side of installation component guide component, and pressure relief component is slidably installed in the inside of guide component.This application improves the safety and reliability of oil and gas production.This application wellhead reduces production cost, and achieves the purpose of low-carbon environmental protection exploitation.

Description

Technical Field

[0001] This invention relates to the field of low-carbon oil well extraction technology, particularly to shale gas extraction technology, and especially to oil wellhead equipment. Background Technology

[0002] In oilfield production and gas extraction equipment, the wellhead device is also called the Christmas tree. The wellhead device is a crucial surface equipment in the oilfield production and gas extraction process. It mainly consists of components such as the casing head, tubing head, and Christmas tree. The casing head is used to connect and seal the surface casing and the technical casing, bear the weight of multiple casing layers, ensure the stability of the wellhead, and provide a basic interface for the subsequent installation of other components. The tubing head mainly serves to suspend the tubing string, seal the annular space between the tubing and the casing, and can withstand the pressure of the fluid column inside the tubing as well as various complex loads during the oil extraction process.

[0003] If the wellhead is not fixed securely, the wellhead equipment will be subjected to huge impact forces during the oil production process, especially when the pressure inside the well is high. This instability may cause the valves, flanges and other components of the wellhead to loosen, deform or even be damaged. Once the wellhead equipment ruptures, it will lose effective control of the oil well pressure and cause a blowout accident. Summary of the Invention

[0004] In view of the problems existing in the above-mentioned oil wellhead equipment, the present invention is proposed.

[0005] Therefore, the present invention provides an oil wellhead device, the purpose of which is to solve the problem that the oil wellhead is not fixed and will be subjected to huge impact forces during oil production, which can easily cause valves, flanges, etc. to loosen, deform or even be damaged. If the device breaks, pressure control will be lost, leading to a blowout accident.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: an oil wellhead device, including a connector, an adjustment unit, a conveying unit, a pressure relief unit, and a pressure guide; an adjustment unit is fixedly installed on the top of the connector, a conveying unit is fixedly installed on one side of the adjustment unit, a pressure relief unit is fixedly installed on the other end of the adjustment unit, and a pressure guide is fixedly installed on the inner wall of the connector, and the pressure guide cooperates with the adjustment unit; the adjustment unit includes an installation component fixedly installed on the top of the connector, and an adjustment component slidably installed inside the installation component; the pressure relief unit includes a guide component fixedly installed on one side of the installation component, and a pressure relief component slidably installed inside the guide component.

[0007] As a preferred embodiment of the oil wellhead device of the present invention, the installation component includes an installation housing fixedly installed on the connector, and a sliding limiting groove provided on the inner wall of the installation housing.

[0008] As a preferred embodiment of the oil wellhead device of the present invention, the adjustment assembly includes an adjustment component fixedly installed on the mounting housing, a movable rod slidably installed on the adjustment component, a sealing gasket fixedly installed at the bottom of the movable rod, and a piston fixedly installed on the sealing gasket, wherein the piston is slidably connected to the mounting housing.

[0009] In a preferred embodiment of the oil wellhead device of the present invention, a connecting collar is fixedly installed on the outer wall of the moving rod, and a limiting piece is fixedly installed on the outer wall of the connecting collar, and the limiting piece is slidably connected to the sliding limiting groove.

[0010] As a preferred embodiment of the oil wellhead device of the present invention, a movable plate is fixedly installed on the outer wall of the connecting collar, and a return spring is fixedly installed on the bottom movable plate, with the other end of the return spring connected to the sealing gasket.

[0011] In a preferred embodiment of the oil wellhead device of the present invention, a second reset spring is fixedly installed on the top movable plate, and the second reset spring is fixedly connected to the mounting shell.

[0012] As a preferred embodiment of the oil wellhead device of the present invention, the guide assembly includes a guide pipe fixedly installed on the outer wall of the mounting housing, a pressure relief main pipe fixedly installed on the guide pipe, and a pressure relief branch pipe fixedly installed on the outer wall of the guide pipe, wherein the pressure relief branch pipe and the pressure relief main pipe pass through and are connected.

[0013] As a preferred embodiment of the oil wellhead device of the present invention, the pressure relief assembly includes an adjusting component two fixedly installed on the guide pipe, and a movable rod two slidably installed on the adjusting component two.

[0014] In a preferred embodiment of the oil wellhead device of the present invention, a piston is fixedly installed at the other end of the moving rod, and the piston is slidably connected to the guide tube.

[0015] As a preferred embodiment of the oil wellhead device of the present invention, a return spring three is fixedly installed on one side of the piston two, and the other end of the return spring three is fixedly connected to the guide tube.

[0016] The beneficial effects of this invention are as follows: First, the wellhead is securely connected via a connector. The oil delivery speed and pressure are regulated by an adjustment component. Then, the oil is guided into the pressure relief unit via a pressure guide component to achieve stable, routine delivery. If the oil pressure is too high, the pressure relief component is moved to complete the first stage of pressure relief. If the pressure control requirements are still not met, the pressure relief component continues to move, triggering the pressure relief branch pipe and main pipe to work synchronously, forming a second stage of pressure relief. This reduces the impact force on the wellhead device, prevents component loosening and damage, and prevents device rupture and pressure loss, fundamentally avoiding the risk of blowouts and meeting environmental protection requirements. It is applicable to high-pressure oil wells and also to deep-sea oil drilling wells, improving the safety and reliability of oil and gas production. The wellhead design of this application reduces production costs and achieves the goal of low-carbon and environmentally friendly mining. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of the oil wellhead device of the present invention.

[0019] Figure 2 This is a schematic diagram of the internal structure of the oil wellhead device of the present invention.

[0020] Figure 3 This is a cross-sectional structural diagram of the oil wellhead device of the present invention.

[0021] Figure 4 This is a schematic cross-sectional view of the connecting component of the oil wellhead device of the present invention.

[0022] Figure 5 This is a schematic cross-sectional view of the buffer unit of the oil wellhead device of the present invention.

[0023] Figure 6 This is a schematic cross-sectional view of the pressure relief unit of the oil wellhead device of the present invention.

[0024] Explanation of reference numerals in the attached drawings: 1. Connecting component; 2. Adjusting unit; 21. Mounting assembly; 211. Mounting housing; 212. Sliding limit groove; 22. Adjusting assembly; 221. Adjusting component one; 222. Moving rod one; 223. Sealing gasket; 224. Piston one; 225. Return spring one; 226. Connecting collar; 227. Limiting plate; 228. Moving plate; 229. Return spring two; 3. Conveying unit; 4. Pressure relief unit; 41. Guide assembly; 411. Guide tube; 412. Pressure relief branch tube; 413. Pressure relief main tube; 42. Pressure relief assembly; 421. Adjusting component two; 422. Moving rod two; 423. Piston two; 424. Return spring three; 5. Pressure guide component. Detailed Implementation

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0026] Example 1, referring to Figure 1 - Figure 2 The first embodiment of the present invention provides an oil wellhead device, which includes: a connector 1 for connecting to the oil wellhead; an adjustment unit 2 for adjusting the oil delivery pressure; a delivery unit 3 for normal oil delivery; a pressure relief unit 4 for early warning and pressure relief of oil pressure; and a pressure guide 5 for oil delivery.

[0027] The top of the connector 1 is fixedly equipped with an adjustment unit 2 for adjusting and transporting oil normally. A conveying unit 3 is fixedly installed on one side of the adjustment unit 2 for transporting oil. A pressure relief unit 4 is fixedly installed at the other end for oil pressure warning and pressure relief. In addition, a pressure guide 5 is fixedly installed on the inner wall of the connector 1, which works with the adjustment unit 2 to guide the transport of oil.

[0028] Furthermore, the adjustment unit 2 includes a mounting assembly 21 fixedly mounted on the top of the connector 1 for storing and conveying oil, and an adjustment assembly 22 slidably mounted inside the mounting assembly 21 for adjusting the conveying range of oil quantity and oil pressure.

[0029] The pressure relief unit 4 includes a guide assembly 41 fixedly installed on one side of the mounting assembly 21 for buffering the oil pressure, and a pressure relief assembly 42 slidably installed inside the guide assembly 41 for relieving pressure when the oil pressure is too high.

[0030] During use, the system is first connected to the wellhead via connector 1. Oil is transported from the pressure guide 5 inside connector 1 to the installation assembly 21. By adjusting the height of assembly 22 inside the installation assembly 21, the oil pressure delivery is adjusted to ensure stable oil delivery to the delivery unit 3 and output. When the oil pressure inside the installation assembly 21 is too high or the oil volume is too large, the adjustment assembly 22 is adjusted and moved to the top to coordinate with the oil pressure delivery. If the oil pressure is still too high, the oil pressure will squeeze the pressure relief assembly 42, causing it to move to the pressure relief main pipe 413 inside the guide assembly 41, starting the first stage of pressure relief. If the oil pressure continues to rise, the pressure relief branch pipe 412 will also participate in the pressure relief, simultaneously cooperating with the adjustment assembly 22 to perform the third stage of pressure relief and issue an early warning, thereby ensuring stable oil pressure at the wellhead and avoiding damage to the well due to excessive pressure.

[0031] Example 2, refer to Figure 1 - Figure 5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that the installation component 21 includes an installation housing 211 fixedly installed on the connector 1 for initial storage of the oil delivered by the connector 1, and a sliding limiting groove 212 provided on the inner wall of the installation housing 211 for cooperating with the movement of the limiting piece 227.

[0032] Compared to Embodiment 1, the adjustment assembly 22 further includes an adjustment member 221 fixedly mounted on the mounting housing 211 for rotation to move the moving rod 222; the moving rod 222 slidably mounted on the adjustment member 221 for adjusting the position of the sealing gasket 223 inside the mounting housing 211, thereby controlling the delivery of oil pressure; the sealing gasket 223 fixedly mounted on the bottom of the moving rod 222 for sealing; and a piston 224 fixedly mounted on the sealing gasket 223, and the piston 224 is slidably connected to the mounting housing 211 for limiting and adjusting the oil volume.

[0033] Furthermore, a connecting collar 226 is fixedly installed on the outer wall of the moving rod 222 to limit the oil pressure inside the mounting housing 211; a limiting piece 227 is fixedly installed on the outer wall of the connecting collar 226 to cooperate with the movement of the piston 224, and the limiting piece 227 is slidably connected to the sliding limiting groove 212 to cooperate with the movement of the limiting piece 227.

[0034] Furthermore, a movable plate 228 is fixedly installed on the outer wall of the connecting collar 226. A movable plate 228 is provided at the top and bottom of the outer wall of the connecting collar 226 for connecting the return spring 225. The bottom movable plate 228 is fixedly installed with the return spring 225, and the other end of the return spring 225 is connected to the sealing gasket 223 for buffering when moving and adjusting in conjunction with the sealing gasket 223.

[0035] Furthermore, a second return spring 229 is fixedly installed on the top movable plate 228, and the second return spring 229 is fixedly connected to the mounting housing 211 to buffer the movement of the first movable rod 222 and the limiting piece 227.

[0036] During operation, after connecting to the wellhead via connector 1, oil pressure is transmitted through connector 1 to the interior of the mounting housing 211. At this time, the positions of the moving rod 222, the sealing gasket 223, and the piston 224 inside the mounting housing 211 can be adjusted by rotating the adjusting component 221, thereby limiting the oil delivery volume and ensuring stable delivery of oil to the delivery unit 3. Simultaneously, the oil pressure inside the mounting housing 211 can also be adjusted. However, when the oil pressure inside the mounting housing 211 is too high, the moving rod 222 begins to move upwards, and the sealing gasket 223... Gasket 223 and piston 224 also move upwards, and return spring 225 provides initial buffer for the movement of gasket 223. Connecting collar 226 also moves with moving rod 222, causing limit plate 227 to slide inside sliding limit groove 212 to adjust the oil pressure inside mounting housing 211. If the oil pressure exceeds the predetermined threshold, gasket 223, piston 224 and moving rod 222 all move upwards to the top of mounting housing 211, starting to fully deliver oil pressure and simultaneously performing first-stage pressure relief.

[0037] The remaining structure is the same as that in Example 1.

[0038] Example 3, referring to Figure 1 - Figure 6 This is the third embodiment of the present invention, which differs from the second embodiment in that: the guide assembly 41 includes a guide tube 411 fixedly disposed on the outer wall of the mounting housing 211 for guiding the oil pressure inside the mounting housing 211; a pressure relief main tube 413 fixedly disposed on the guide tube 411 for secondary pressure relief of the oil pressure; and a pressure relief branch tube 412 fixedly disposed on the outer wall of the guide tube 411 for tertiary pressure relief of the oil pressure. In addition, the pressure relief branch tube 412 penetrates and connects to the pressure relief main tube 413 to enhance the pressure relief capacity.

[0039] Compared to Embodiment 2, the pressure relief assembly 42 further includes an adjustment member 421 fixedly mounted on the guide tube 411 for adjusting the pressure relief threshold; and a moving rod 422 slidably mounted on the adjustment member 421 for moving and connecting to the piston 423.

[0040] Furthermore, a piston 423 is fixedly installed at the other end of the moving rod 422, and the piston 423 is slidably connected to the guide tube 411 to limit the oil pressure.

[0041] Furthermore, a return spring 424 is fixedly installed on one side of piston 2 423, and the other end of return spring 3 424 is fixedly connected to guide tube 411 to connect piston 2 423 and ensure its stability during movement.

[0042] During use, when the oil pressure inside the housing 211 is too high and the first-stage pressure relief of the adjusting component 22 cannot meet the demand, the oil pressure begins to compress the piston 423, causing it to move stably under the action of the return spring 424. When the piston 423 is compressed by the oil pressure and moves beyond the pressure relief main pipe 413, the oil pressure begins to leak from inside the pressure relief main pipe 413, initiating the second-stage pressure relief. If the second-stage pressure relief still does not meet the demand, the piston 423 continues to move, exceeding the pressure relief branch pipe 412. At this time, the pressure relief branch pipe 412, in conjunction with the pressure relief main pipe 413, performs a third-stage pressure relief and activates the warning system. Through multi-stage pressure relief, the oil pressure is ensured to remain stable during the delivery process.

[0043] When the oil pressure inside the housing 211 decreases, the return spring 3 424 pushes the piston 2 423 back to one end of the guide tube 411, resealing the inside of the housing 211, restoring normal oil pressure delivery, reducing the impact force on the wellhead device, avoiding component loosening and damage, preventing device rupture and pressure loss, thereby fundamentally avoiding the risk of blowout. It is suitable for high-pressure oil wells and improves the safety and reliability of oil production.

[0044] The remaining structure is the same as that in Example 2.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An oil wellhead device, characterized in that: Includes connector (1), It also includes an adjustment unit (2), a conveying unit (3), a pressure relief unit (4), and a pressure guide (5); An adjustment unit (2) is fixedly installed on the top of the connector (1), a conveying unit (3) is fixedly installed on one side of the adjustment unit (2), a pressure relief unit (4) is fixedly installed on the other end of the adjustment unit (2), and a pressure guide (5) is fixedly installed on the inner wall of the connector (1), and the pressure guide (5) cooperates with the adjustment unit (2). The adjustment unit (2) includes a mounting assembly (21) fixedly mounted on the top of the connector (1) and an adjustment assembly (22) slidably mounted inside the mounting assembly (21). The pressure relief unit (4) includes a guide assembly (41) fixedly mounted on one side of the mounting assembly (21) and a pressure relief assembly (42) slidably mounted inside the guide assembly (41).

2. The wellhead device according to claim 1, characterized in that: The mounting assembly (21) includes a mounting housing (211) fixedly mounted on the connector (1) and a sliding limiting groove (212) provided on the inner wall of the mounting housing (211).

3. The oil wellhead device according to claim 2, characterized in that: The adjustment assembly (22) includes an adjustment member (221) fixedly mounted on the mounting housing (211), a moving rod (222) slidably mounted on the adjustment member (221), a sealing gasket (223) fixedly mounted on the bottom of the moving rod (222), and a piston (224) fixedly mounted on the sealing gasket (223), and the piston (224) is slidably connected to the mounting housing (211).

4. The oil wellhead device according to claim 3, characterized in that: A connecting collar (226) is fixedly installed on the outer wall of the moving rod (222), and a limiting piece (227) is fixedly installed on the outer wall of the connecting collar (226), and the limiting piece (227) is slidably connected to the sliding limiting groove (212).

5. The oil wellhead device according to claim 4, characterized in that: A movable plate (228) is fixedly installed on the outer wall of the connecting collar (226), and a reset spring (225) is fixedly installed on the bottom movable plate (228), and the other end of the reset spring (225) is connected to the sealing gasket (223).

6. The oil wellhead device according to claim 5, characterized in that: A second reset spring (229) is fixedly installed on the top movable plate (228), and the second reset spring (229) is fixedly connected to the mounting housing (211).

7. The oil wellhead device according to claim 6, characterized in that: The guide assembly (41) includes a guide tube (411) fixedly installed on the outer wall of the mounting housing (211), a pressure relief main tube (413) fixedly installed on the guide tube (411), and a pressure relief branch tube (412) fixedly installed on the outer wall of the guide tube (411), wherein the pressure relief branch tube (412) and the pressure relief main tube (413) pass through and are connected.

8. The oil wellhead device according to claim 7, characterized in that: The pressure relief assembly (42) includes an adjustment member two (421) fixedly mounted on the guide tube (411) and a movable rod two (422) slidably mounted on the adjustment member two (421).

9. The oil wellhead device according to claim 8, characterized in that: The other end of the moving rod (422) is fixedly installed with piston (423), and piston (423) is slidably connected to guide tube (411).

10. The oil wellhead device according to claim 9, characterized in that: A return spring three (424) is fixedly installed on one side of piston two (423), and the other end of return spring three (424) is fixedly connected to guide tube (411).

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