Pressure maintaining and buffering structure based on hydraulic displacement wellhead

Abstract

The utility model discloses a pressure maintaining and buffering structure based on a hydraulic displacement wellhead, and belongs to the technical field of underground mining equipment. The device comprises a pre-embedded cylinder part, the bottom of the pre-embedded cylinder part is sleeved with a turbulent flow sleeve, a connecting ring is arranged at the bottom of the turbulent flow sleeve, a conical ring frame is erected at the center in the turbulent flow sleeve, and a plurality of sets of swing arc plates are hinged to the top of the conical ring frame; according to the design, through stable connection and flexible swing of components, gas medium flow is optimized, impact on the spiral cone is effectively dispersed, abrasion is reduced, gas diffusion and disordered flow are promoted through the design of the cone ring frame, the direct current cavity and the backflow cavity, directional impact is further reduced, the rotating shaft rod can be connected with a generator or a driving motor, and energy is saved. Energy conversion or active driving of gas rotation is achieved, the energy utilization efficiency is improved, the flow dividing top frame is designed to guide active flow dividing of gas, a wellhead is protected against damage, the counterweight ball cover and the pre-buried cylinder part cooperatively press the wellhead, and stability is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of underground mining equipment, in particular to a pressure-maintaining buffer structure based on a hydraulic displacement wellhead. Background Art

[0002] Wellhead equipment plays a crucial role in the extraction of resources like oil and natural gas. However, traditional wellhead systems are gradually exposing their limitations when dealing with special operating conditions. For example, in deep and ultra-deep wells, downhole pressure and temperature conditions become extremely complex and harsh as well depth increases. Rapid pressure fluctuations during tripping, blowout preventer testing, and other wellhead operations can easily lead to problems such as seal failure in the wellhead system and damage from pipeline vibration.

[0003] In conjunction with the above content, it should be noted that: Chinese patent publication number CN207739973U discloses a wellhead device with good buffering effect, which uses multiple sets of springs and guide plates to unload the high pressure generated by the gas gushing in the wellhead. However, during actual use, the above device and the equipment connected to the wellhead are affected by the long-term continuous pressure of the gas medium flowing at the wellhead during the unloading period, which is prone to spring fatigue failure and damage to the device installation and connection area, thereby creating greater safety hazards.

[0004] Chinese patent publication number CN212671717U discloses a wellhead with pressure buffering, which uses a fixed sleeve and a pressure-resistant steel plate to provide local protection and limit protection to the inner wall of the wellhead. However, during actual use, the above-mentioned components lack a force-unloading buffer structure, causing the pressure in the wellhead to directly impact the pressure-resistant steel plate and then be transmitted to the wellhead body, resulting in limited protection for the inlet.

[0005] In view of the above technical defects, a solution is now proposed. Summary of the Invention

[0006] The purpose of the utility model is to provide a pressure-maintaining buffer structure based on a hydraulic displacement wellhead to solve the problem raised.

[0007] The purpose of the utility model can be achieved through the following technical solutions: a pressure-maintaining buffer structure based on a hydraulic displacement wellhead includes an embedded cylinder, a spoiler sleeve is sleeved on the bottom of the embedded cylinder, a connecting ring is provided at the bottom of the spoiler sleeve, a cone ring frame is provided at the center of the spoiler sleeve, a plurality of swing arc plates are hinged on the top of the cone ring frame, and a support cylinder cover is provided on the top of the embedded cylinder;

[0008] A diverter top frame is provided on the top of the support tube cover, and multiple groups of external valve seats are symmetrically provided around the outer wall of the diverter top frame. A spiral cone extending into the interior of the support tube cover is provided inside the diverter top frame.

[0009] Preferably, the embedded cylinder is designed in an I-shaped structure, and disks are provided on the top and bottom of the embedded cylinder, and a metal cylinder is provided between the two groups of disks.

[0010] Preferably, the top of the spoiler sleeve is sleeved in the inner wall of the metal cylinder at the bottom of the embedded cylinder, and the bottom of the spoiler sleeve is provided with a sealing ring that is sleeved with the outer wall of the connecting ring. The outer periphery of the top of the connecting ring is provided with an overflow port located above the sealing ring, and a card groove is provided between the outer wall of the bottom of the connecting ring and the sealing ring.

[0011] Preferably, the outer wall of the cone ring frame is provided with reinforcing ribs connected to the inner wall of the spoiler sleeve, the top inner wall of the spoiler sleeve is recessed with an outer arc guide groove, a reflux cavity is formed between the outer wall of the cone ring frame and the spoiler sleeve, and a direct current cavity is formed inside the cone ring frame.

[0012] Preferably, the swing arc plates are arranged in a ring shape on the top of the conical ring frame, and the swing arc plates are designed to be narrow at the top and wide at the bottom.

[0013] Preferably, a counterweight ball cover is provided on the top of the diversion top frame, a rotating shaft is provided at the center of the inner wall of the diversion top frame, the bottom of the rotating shaft is sleeved with the top of the spiral cone, and a spiral groove is provided on the surface of the spiral cone.

[0014] Preferably, a plurality of support frames are provided on the outer wall of the support tube cover, and the bottom of the support tube cover is embedded in the metal cylinder of the embedded cylinder.

[0015] Beneficial effects of the utility model:

[0016] The utility model firmly connects the conveying pipe with the relevant components in the well through accessories, thereby ensuring the stability and safety of the structure. At the same time, the design of the swing arc plate allows it to swing within a certain range, thereby increasing the flexibility and adaptability of the structure in guiding the gas medium. After the gas medium enters the spoiler sleeve, the design of the cone ring frame and the direct current cavity realizes the diffusion and swing of the gas medium, effectively reducing the continuous concentrated impact on the spiral cone and extending the service life of the equipment.

[0017] The utility model is that after part of the gas medium enters the reflux chamber, it is guided by the outer arc guide groove and then impacts the swing arc plate again, thereby further dispersing the impact force of the gas medium. The mutual interference of multiple groups of gas media inside the direct current chamber and the reflux chamber produces disorder in the gas flow trajectory, further reducing the impact wear on the directional area of ​​the spiral cone surface; the active diversion and leakage of the gas medium reduces the direct and continuous impact on the wellhead, and protects the wellhead from damage. Through the coordinated use of the counterweight ball cover and the embedded cylinder, the wellhead area is suppressed, thereby improving the overall stability and safety. At the same time, the comprehensive improvement of energy utilization, environmental protection and economic benefits has high practical value and social benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings;

[0019] Figure 1 This is a three-dimensional diagram of the overall structure of the utility model;

[0020] Figure 2 This is a structural diagram of the embedded cylinder of the utility model;

[0021] Figure 3 This is a structural diagram of the embedded cylinder of the utility model;

[0022] Figure 4 This is a schematic diagram of the connection structure between the diversion top frame and the support tube cover of the utility model;

[0023] Figure 5 It is a structural schematic diagram of the utility model diversion top frame.

[0024] Legend: 1. Embedded cylinder; 2. Diverter top frame; 201. Spiral cone; 202. Rotating shaft; 203. Counterweight ball cover; 3. External valve seat; 4. Spoiler sleeve; 401. Connecting ring; 402. Sealing ring; 403. Outer arc guide groove; 404. Cone ring frame; 405. Reinforcement rib; 406. Overflow port; 5. Swinging arc plate; 6. Support cylinder cover. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1: Please refer to Figure 1 - Figure 5As shown, this embodiment is a pressure-maintaining buffer structure based on a hydraulic displacement wellhead, including an embedded cylinder 1, a spoiler sleeve 4 is sleeved on the bottom of the embedded cylinder 1, a connecting ring 401 is provided at the bottom of the spoiler sleeve 4, a cone ring frame 404 is provided at the center of the spoiler sleeve 4, and multiple groups of swing arc plates 5 are hinged on the top of the cone ring frame 404, and a supporting cylinder cover 6 is provided on the top of the embedded cylinder 1. The connecting ring 401 is sleeved on the outlet of the conveying pipe in the well and fixed by relevant accessories. The relevant accessories include flanges, gaskets, sealing rings, etc., which are only used for connection and fixation between components, and are not limited to this. The key parts of conveying in the well are adjusted according to actual needs and inserted into the card slot.

[0027] The embedded cylinder 1 is designed in an I-shaped structure. Discs are provided at the top and bottom of the embedded cylinder 1. A metal cylinder is provided between the two sets of discs. The top of the spoiler sleeve 4 is sleeved in the inner wall of the metal cylinder at the bottom of the embedded cylinder 1. The bottom of the spoiler sleeve 4 is provided with a sealing ring 402 that is sleeved with the outer wall of the connecting ring 401. The outer periphery of the top of the connecting ring 401 is provided with an overflow port 406 located above the sealing ring 402, and a slot is provided between the outer wall of the bottom of the connecting ring 401 and the sealing ring 402.

[0028] During the process of the gas medium in the wellbore being transported outward, the gas medium first enters the spoiler sleeve 4 along the inside of the conveying pipe. Affected by the structure of the cone ring frame 404, which is wide at the top and narrow at the bottom, the gas medium enters the DC cavity. Due to the change in the diameter of the DC cavity, the gas medium is caused to diffuse to the surroundings and push the swing arc plate 5 to rotate outward, causing the gas medium passing through the DC cavity to swing, thereby reducing the continuous concentrated impact of the gas medium on the spiral cone 201.

[0029] The outer wall of the cone ring frame 404 is provided with a reinforcing rib 405 connected to the inner wall of the spoiler sleeve 4, and the inner wall of the top of the spoiler sleeve 4 is recessed with an outer arc guide groove 403. A reflux chamber is formed between the outer wall of the cone ring frame 404 and the spoiler sleeve 4, and a direct current chamber is formed inside the cone ring frame 404. Part of the gas medium passing through the direct current chamber enters the reflux chamber along the overflow port 406 and flows upward along the inside of the reflux chamber. When the gas medium passes through the outer arc guide groove 403, it is affected by the structure of the outer arc guide groove 403, prompting the gas medium to be guided from the outside to the inside along the inner wall of the outer arc guide groove 403, causing the gas medium to impact on the swing arc plate 5, prompting the swing arc plate 5 to swing within a certain range due to the impact force of the gas medium flow. The top of the ring frame 404 is recessed with a notch connected to the bottom of the swing arc plate 5, and the bottom of the swing arc plate 5 is provided with a limiting boss inserted into the notch, thereby limiting the swing angle and initial angle of the swing arc plate 5 under the push of the gas medium. The swing arc plate 5 adjusts its initial angle according to actual needs and is not limited to the neat angle shown in the accompanying drawings. Multiple groups of gas media inside the direct current cavity and the reflux cavity are gathered in the metal cylinder of the embedded cylinder 1. At the same time, when multiple groups of gas media converge, they interfere with each other to produce disorder in the gas flow trajectory, further reducing the impact wear on the directional area of ​​the spiral cone 201 surface. The swing arc plate 5 is arranged in a ring shape on the top of the cone ring frame 404, and the swing arc plate 5 is designed with a narrow upper and wide lower structure.

[0030] Embodiment 2: The pressure-maintaining buffer structure based on the hydraulic displacement wellhead of this embodiment includes a diverter top frame 2 provided on the top of the support tube cover 6, multiple groups of external valve seats 3 are symmetrically provided around the outer wall of the diverter top frame 2, and a spiral cone 201 extending to the inside of the support tube cover 6 is provided inside the diverter top frame 2.

[0031] A counterweight ball cover 203 is provided on the top of the diversion top frame 2, and a rotating shaft 202 is provided at the center of the inner wall of the diversion top frame 2. The bottom of the rotating shaft 202 is socketed with the top of the spiral cone 201, and the surface of the spiral cone 201 is concave with a spiral groove. When the turbulent gas medium flows up along the inside of the metal cylinder and contacts the spiral cone 201, the bottom of the rotating shaft 202 is rotatably socketed with the spiral cone 201. At the same time, according to actual needs, a generator or a drive motor can be embedded in the counterweight ball cover 203. If it is a generator, the generator is connected to the rotating shaft through relevant accessories, so that when the gas medium contacts the spiral cone 201, the spiral cone 201 is pushed to rotate through the influence of the spiral groove on the surface of the spiral cone 201, thereby driving the generator to operate and generate electricity.

[0032] Multiple groups of support frames are provided on the outer wall of the support tube cover 6, and the bottom of the support tube cover 6 is embedded in the metal cylinder of the embedded cylinder 1. If it is a driving motor, according to the influence of the gas medium pressure, the driving motor actively drives the spiral cone 201 to rotate through related accessories, and then actively pulls the gas medium to rotate into the diversion top frame 2. The diversion top frame 2 is recessed with a hemispherical cavity, and the hemispherical cavity is surrounded by openings for connecting to the external valve seat 3, which is convenient for guiding the active diversion and leakage of the gas medium according to the opening and closing conditions of the external valve, while reducing the direct and continuous contact of the gas medium with the wellhead, thereby protecting the wellhead from damage. At the same time, the counterweight ball cover 203 is used in conjunction with the embedded cylinder 1 to suppress the wellhead area.

[0033] In combination with Example 1 and Example 2, the flow of the gas medium is optimized through a stable connection and flexible swinging components, effectively dispersing the impact on the spiral cone 201 and reducing wear. The design of the cone ring frame 404, the direct current chamber, and the reflux chamber promotes gas diffusion and turbulent flow, further reducing directional impact. At the same time, the rotating shaft 202 can be connected to a generator or a drive motor to achieve energy conversion or actively drive gas rotation, thereby improving energy utilization efficiency. The design of the diversion top frame 2 guides the active diversion of gas, protecting the wellhead from damage. The counterweight ball cover 203 and the embedded cylinder 1 cooperate to suppress the wellhead and enhance stability. The overall design takes into account structural stability, flow optimization, energy utilization, and environmental protection, thereby improving overall benefits.

[0034] The above content is merely an example and explanation of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they should all fall within the scope of protection of the present invention.

[0035] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0036] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A pressure-maintaining buffer structure based on a hydraulic displacement wellhead, comprising a pre-buried cylinder (1), characterized in that: The bottom of the embedded cylinder (1) is sleeved with a spoiler sleeve (4), the bottom of the spoiler sleeve (4) is provided with a connecting ring (401), the center of the spoiler sleeve (4) is provided with a cone ring frame (404), the top of the cone ring frame (404) is hinged with multiple groups of swing arc plates (5), and the top of the embedded cylinder (1) is provided with a support cylinder cover (6); the top of the support cylinder cover (6) is provided with a diverter top frame (2), the outer wall of the diverter top frame (2) is symmetrically provided with multiple groups of external valve seats (3), and the inside of the diverter top frame (2) is provided with a spiral cone (201) extending to the inside of the support cylinder cover (6).

2. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 1 is characterized in that: The embedded cylinder (1) is designed in an I-shaped structure, and circular discs are provided at the top and bottom of the embedded cylinder (1), with a metal cylinder provided between the two sets of circular discs.

3. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 2 is characterized in that: The top of the spoiler sleeve (4) is sleeved in the inner wall of the metal cylinder at the bottom of the embedded cylinder (1); the bottom of the spoiler sleeve (4) is provided with a sealing ring (402) sleeved with the outer wall of the connecting ring (401); the outer periphery of the top of the connecting ring (401) is provided with an overflow port (406) located above the sealing ring (402); and a slot is provided between the outer wall of the bottom of the connecting ring (401) and the sealing ring (402).

4. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 3 is characterized in that: The outer wall of the cone ring frame (404) is provided with a reinforcing rib (405) connected to the inner wall of the spoiler sleeve (4), and the top inner wall of the spoiler sleeve (4) is recessed with an outer arc guide groove (403). A reflux cavity is formed between the outer wall of the cone ring frame (404) and the spoiler sleeve (4), and a direct current cavity is formed inside the cone ring frame (404).

5. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 1 is characterized in that: The swing arc plates (5) are arranged in a ring shape on the top of the conical ring frame (404), and the swing arc plates (5) are designed to be narrow at the top and wide at the bottom.

6. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 1, characterized in that: A counterweight ball cover (203) is provided on the top of the diversion top frame (2), a rotating shaft (202) is provided at the center of the inner wall of the diversion top frame (2), the bottom of the rotating shaft (202) is sleeved with the top of the spiral cone (201), and a spiral groove is provided on the surface of the spiral cone (201).

7. The pressure-maintaining buffer structure based on hydraulic displacement wellhead according to claim 2, characterized in that: A plurality of support frames are provided on the outer wall of the support cylinder cover (6), and the bottom of the support cylinder cover (6) is embedded in the metal cylinder of the embedded cylinder part (1).

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