Intelligent throttler for natural gas well

Abstract

The invention relates to the technical field of natural gas wells, in particular to a natural gas well intelligent throttler which comprises a throttling mechanism, the throttling mechanism comprises a throttling pipe, a gas inlet and a gas outlet, the throttling pipe is internally provided with a gas flow cavity, and the gas inlet and the gas outlet are detachably connected to the two ends of the throttling pipe; a hydraulic cylinder is connected to the side, close to a gas outlet end opening of the throttle pipe, of the support plate, a stop block is connected to an extension rod of the hydraulic cylinder, natural gas flows in the throttle pipe to drive the driving fan to rotate, and therefore the small generator assembly can generate electricity, energy is supplied to multiple assemblies needing electricity, and the power generation efficiency is improved. Compared with the prior art, cable power supply can be avoided, the follow-up maintenance difficulty is reduced, meanwhile, overall operation is more stable, the shutdown state is not prone to occurring, natural gas and all assemblies can be separated through the protection sleeve, and the situation of spark leakage is avoided.

Description

Technical Field

[0001] This invention relates to the field of natural gas well technology, specifically to a smart throttle device for natural gas wells. Background Technology

[0002] Downhole throttling technology involves finding a suitable location within the production string of a natural gas well and installing a throttling device. During wellbore depressurization, the geothermal temperature is fully utilized to reheat the fluid, restoring the wellhead temperature to a level similar to that before throttling. This significantly prevents freezing and blockage of the gas-water mixture in the wellbore and at the wellhead, thereby reducing the need for surface throttling and heating equipment, simplifying surface processes, and lowering gas production costs. Furthermore, it effectively reduces wellbore pressure and the pressure on the pipeline from the wellhead to the gathering station, reducing pipeline wall thickness and significantly lowering the cost of gathering and transmission pipelines. In the simplest terms, downhole throttling technology is like installing a gas nozzle downhole.

[0003] Commonly used throttles are generally installed at the wellhead or bottom. While throttles installed at the wellhead can prevent ice blockage in surface pipelines, some wells may still experience wellbore ice blockage. To reduce the occurrence of this, throttles are often installed at the bottom of the well. Although this can completely solve the problem, it also requires adjustments based on fluctuations in formation gas output. The adjustment process is usually complex, time-consuming, and costly. In addition, it still requires power supply. If the line breaks, not only is it time-consuming to find the break point, but repair is also inconvenient. Therefore, there is still a certain inconvenience in actual use. Thus, there is a need to design an intelligent throttle for natural gas wells. Summary of the Invention

[0004] The purpose of this invention is to provide a smart throttle for natural gas wells, which addresses the problem mentioned in the background art where, in order to reduce the occurrence of the aforementioned situations, the throttle is often installed at the bottom of the well. Although this can completely solve the problem, it also requires adjustments based on fluctuations in the formation's gas output. The adjustment process is usually complex, time-consuming, and costly. In addition, it still requires power supply, and if the line breaks, not only is it time-consuming to find the break point, but repairs are also inconvenient. Therefore, it still presents certain inconveniences in actual use.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a natural gas well intelligent throttle device, comprising a throttle mechanism, wherein the throttle mechanism comprises a throttle pipe with an internal airflow chamber and an inlet and an outlet detachably connected at both ends, a support plate is connected to the inner surface of the throttle pipe, a hydraulic cylinder is connected to the side of the support plate near the outlet port of the throttle pipe, and a blocking block is connected to the extension rod of the hydraulic cylinder for sealing and throttling the outlet port of the throttle pipe;

[0006] The power supply mechanism includes a protective sleeve connected to the side of the support plate near the air inlet port of the throttle tube, and the side is open. A lubricating sleeve is connected to the opening of the protective sleeve, and the lubricating sleeve has a cavity for holding flame-retardant grease-like lubricating oil. A small generator assembly for power generation is connected inside the protective sleeve. The input shaft of the small generator assembly extends through the opening of the protective sleeve and the lubricating sleeve, and a rubber ring is provided at the passage position of the lubricating sleeve for sealing. A drive fan is connected to the output shaft of the small generator assembly outside the lubricating sleeve, and the side of the lubricating sleeve near the drive fan has an arc design for airflow guidance.

[0007] The air filtration mechanism divides the throttling tube on one side of the drive fan into two sections, and the two sides of the air filtration mechanism are connected to the two sections of the throttling tube.

[0008] An applicable mechanism is provided on the outside of the throttling tube.

[0009] The above technical solution utilizes the flow of natural gas in a throttling pipe to drive the rotation of a drive fan, thereby enabling a small generator assembly to generate electricity and supply power to multiple components requiring power. Compared with existing technologies, this device avoids the use of cable power supply, reducing subsequent maintenance difficulties. It also offers more stable overall operation and is less prone to downtime. Furthermore, a protective sleeve separates the natural gas from each component, preventing spark leakage. A lubrication sleeve, combined with internal oil, lubricates the input shaft of the small generator assembly and blocks natural gas, enhancing the sealing effect. Additionally, the control component can receive wireless signals, facilitating automatic control of the hydraulic cylinders and achieving intelligent throttling.

[0010] Furthermore, the protective sleeve is made of a hollow, heat-conducting material and is filled with water, which is half the volume of the cavity, for heat absorption. The cavity of the protective sleeve is uniformly distributed with annular reinforcing plates to ensure the compressive strength of the protective sleeve.

[0011] The above technical solution improves the thermal conductivity of the protective sleeve while maintaining its compressive strength, making it less prone to deformation.

[0012] Furthermore, an auxiliary frame is movably sleeved on the outside of the input shaft of the small generator assembly inside the lubrication sleeve via a bearing for auxiliary support. Auxiliary rods are evenly connected to the outside of the auxiliary frame, and the auxiliary rods are connected to the inner surface of the cavity of the lubrication sleeve.

[0013] By implementing the above technical solution, the input shaft of the small generator assembly can operate more stably, reducing the probability of deformation.

[0014] Furthermore, the air filtration mechanism includes an installation ring sleeve, with the two sides of the installation ring sleeve connected to the two sections of the throttling tube respectively, and the interface is airtightly treated with a rubber ring. A fixing ring is provided inside the installation ring sleeve, and a support ring is connected inside the fixing ring. An adsorption cylinder is connected to one side of the support ring. The open position of the adsorption cylinder is aligned with the air inlet port of the throttling tube. A paste-like adhesive is applied to the inner wall of the adsorption cylinder, and a filter screen plate is embedded and installed on one side of the adsorption cylinder, directly opposite the drive fan, for airflow conduction.

[0015] The above technical solution involves a simple filtration process for natural gas to prevent impurities from impacting and damaging the drive fan.

[0016] Furthermore, the two sides of the mounting ring are detachably connected to the two ends of the throttling tube by threads. A blocking ring is connected to the inner surface of the mounting ring to block the fixing ring. The blocking ring is evenly connected with a locking rod, and the fixing ring to which the locking rod is aligned has a locking hole to prevent the fixing ring from rotating after installation. The distance between the blocking ring and the side of the mounting ring closest to it is the thickness of one fixing ring.

[0017] The above technical solution makes it easier to replace the support ring and the adsorption cylinder.

[0018] Furthermore, an extension frame is uniformly connected to the inner surface of the adsorption tube. The extension frame is cross-shaped or star-shaped, and the center points of each extension frame are not located on the same straight line. The surface of the extension frame is coated with a paste-like adhesive.

[0019] The above technical solution improves the ability to capture and trap impurities.

[0020] Furthermore, the applicable mechanism includes a rubber sleeve, which is movably fitted onto the surface of the throttling tube, and the inner surface of the rubber sleeve is tightly fitted to the outer surface of the throttling tube. An airbag ring is connected to the outer side of the rubber sleeve, and springs are evenly distributed in a ring on the inner surface of the airbag ring. The thickness of the airbag ring is at least two millimeters.

[0021] The above technical solution facilitates the installation of this device in natural gas production pipelines with different orifice diameters, thereby enhancing its applicability.

[0022] Furthermore, a pushing sleeve is slidably fitted onto the surface of the rubber sleeve. A positioning ring is connected to the side of the rubber sleeve near the natural gas flow to limit the stroke of the pushing sleeve. An air collecting ring is connected to the side of the pushing sleeve near the natural gas flow, forming a windproof space with the pushing sleeve. A pushing seat is uniformly connected in a ring shape on one side of the rubber sleeve, and a pushing plate is hinged to the end of the pushing seat. A rubber block is connected to the outside of the pushing plate, and the pushing sleeve is frustoconical in shape to gradually support and compress the pushing plate, changing its tilt angle.

[0023] The above technical solution improves the fixation effect after installation.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This invention is equipped with a protective cover, a control component, a storage battery, a small generator assembly, and a drive fan. It utilizes the flow of natural gas in a throttling pipe to drive the drive fan to rotate, thereby enabling the small generator assembly to generate electricity and supply power to multiple components that require electricity. In addition, the control component can receive wireless signals, which facilitates the automatic control of the hydraulic cylinder to achieve intelligent throttling effect.

[0026] 2. The invention provides more stable overall operation and reduces the likelihood of downtime. Additionally, the protective sleeve separates natural gas from the various components, preventing spark leakage. Furthermore, the lubrication sleeve, in conjunction with the internal oil, lubricates the input shaft of the small generator assembly and blocks natural gas, enhancing the sealing effect. Attached Figure Description

[0027] Figure 1 This is a top-view perspective view of the overall structure of the present invention;

[0028] Figure 2 This is a top-view perspective view of the throttling mechanism structure of the present invention in an exploded state.

[0029] Figure 3 This is a top-view perspective view of the throttling mechanism structure of the present invention in an exploded state.

[0030] Figure 4 This is a top-view perspective view of the energy supply mechanism structure of the present invention in an exploded state;

[0031] Figure 5 This is a top-view perspective view of the air filtration mechanism structure of the present invention in an exploded state;

[0032] Figure 6 This is a top-view perspective view of the applicable mechanism structure in an exploded state.

[0033] In the diagram: 1. Throttling mechanism; 110. Throttling pipe; 111. Air inlet; 112. Air outlet; 113. Support plate; 114. Hydraulic cylinder; 115. Block; 2. Power supply mechanism; 210. Protective sleeve; 211. Control components; 212. Battery; 213. Small generator assembly; 214. Drive fan; 215. Lubrication sleeve; 216. Auxiliary frame; 217. Auxiliary rod; 3. Air filtration mechanism; 310. Installation. 311. Ring sleeve; 312. Blocking ring; 313. Fixing ring; 314. Support ring; 315. Adsorption cylinder; 316. Filter plate; 317. Positioning rod; 318. Positioning hole; 319. Extension frame; 4. Applicable mechanism; 410. Rubber soft sleeve; 411. Airbag ring sleeve; 412. Spring; 414. Air collecting ring; 415. Pushing sleeve; 416. Pushing seat; 417. Pushing plate; 418. Rubber block; 419. Positioning ring. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Please see Figure 1-6 This invention provides two embodiments:

[0036] Example 1;

[0037] A natural gas well intelligent throttling device includes a throttling mechanism 1. The throttling mechanism 1 includes a throttling pipe 110 with an internal airflow chamber and an inlet 111 and an outlet 112 detachably connected at both ends. A support plate 113 is connected to the inner surface of the throttling pipe 110. A hydraulic cylinder 114 is connected to the side of the support plate 113 near the outlet port of the throttling pipe 110. A blocking block 115 is connected to the extension rod of the hydraulic cylinder 114 for blocking and throttling the outlet port of the throttling pipe 110.

[0038] The power supply mechanism 2 includes a protective sleeve 210, which is connected to the side of the support plate 113 near the air inlet port of the throttle tube 110 and has an open side. A lubricating sleeve 215 is connected to the open side of the protective sleeve 210, and the lubricating sleeve 215 has a cavity inside for holding flame-retardant grease lubricating oil. A small generator assembly 213 for power generation is connected inside the protective sleeve 210. The input shaft of the small generator assembly 213 extends through the open side of the protective sleeve 210 and the lubricating sleeve 215, and a rubber ring is provided at the passage position of the lubricating sleeve 215 for sealing. A drive fan 214 is connected to the output shaft of the small generator assembly 213 outside the lubricating sleeve 215, and the side of the lubricating sleeve 215 near the drive fan 214 has an arc design for airflow guidance.

[0039] The air filter mechanism 3 divides the throttle tube 110 on one side of the drive fan 214 into two sections, and the two sides of the air filter mechanism 3 are connected to the two sections of the throttle tube 110.

[0040] Applicable mechanism 4 is located on the outside of the throttle tube 110. The protective sleeve 210 is a hollow shell made of heat-conducting material and is filled with water with a volume half that of the cavity for heat absorption. The cavity of the protective sleeve 210 shell has evenly distributed annular reinforcing plates to ensure the compressive strength of the protective sleeve 210. The small generator assembly 213 inside the lubrication sleeve 215 has an auxiliary frame 216 movably connected to the outside of the input shaft via a bearing for auxiliary support. The auxiliary frame 216 has evenly connected auxiliary rods 217 on its outside, and the auxiliary rods 217 are connected to the inner surface of the cavity of the lubrication sleeve 215.

[0041] In use, natural gas passes through the inlet 111, the throttle pipe 110, and the outlet 112. The natural gas flow drives the drive fan 214 to rotate, allowing the small generator assembly 213 to start generating electricity. The battery 212 stores the electricity for the subsequent functions of the control assembly 211 and the hydraulic cylinder 114. When throttling is required, the control assembly 211 receives a signal and controls the extension rod of the hydraulic cylinder 114 to extend, allowing the blocking block 115 to block the outlet port of the throttle pipe 110 to a certain extent.

[0042] Example 2;

[0043] The difference from the above embodiment is that the air filtration mechanism 3 includes a mounting ring 310, with the two sides of the mounting ring 310 connected to the two sections of the throttling tube 110 respectively, and the interface is airtight with a rubber ring. A fixing ring 312 is provided inside the mounting ring 310, and a support ring 314 is connected inside the fixing ring 312. An adsorption cylinder 315 is connected to one side of the support ring 314, with the opening of the adsorption cylinder 315 aligned with the air inlet port of the throttling tube 110. A paste-like adhesive is applied to the inner wall of the adsorption cylinder 315, and a filter plate 316 is embedded on one side of the adsorption cylinder 315, directly opposite the drive fan 214, for airflow guidance. The two sides of the mounting ring 310 are threaded. The two sections of the throttling tube 110 are detachably connected. A blocking ring 311 is connected to the inner surface of the mounting ring 310 to block the fixing ring 312. A locking rod 317 is evenly connected to the blocking ring 311, and a locking hole 318 is opened on the fixing ring 312 corresponding to the locking rod 317 to prevent the fixing ring 312 from rotating after installation. The distance between the blocking ring 311 and the side of the nearest mounting ring 310 is the thickness of one fixing ring 312. An extension frame 319 is evenly connected to the inner surface of the adsorption cylinder 315. The extension frame 319 is cross-shaped or star-shaped, and the center points of each extension frame 319 are not on the same straight line. The surface of the extension frame 319 is coated with a paste adhesive.

[0044] During use, the airflow passes through the support ring 314 and the adsorption cylinder 315, and finally exits from the filter plate 316. Simultaneously, the adhesive on the adsorption cylinder 315 and the extension frame 319 can adhere to and capture impurities. When it is necessary to replace the rotatable protective sleeve 210, simply remove it from the throttling tube 110, and then separate the fixing ring 312 from the blocking ring 311.

[0045] Example 3;

[0046] The difference from the above embodiments is that the applicable mechanism 4 includes a rubber sleeve 410, which is movably sleeved on the surface of the throttling tube 110, and the inner surface of the rubber sleeve 410 is tightly fitted with the outer surface of the throttling tube 110. An airbag ring 411 is connected to the outer side of the rubber sleeve 410, and springs 412 are evenly distributed in a ring on the inner surface of the airbag ring 411. The thickness of the airbag ring 411 is at least two millimeters. A push sleeve 415 is slidably sleeved on the surface of the rubber sleeve 410. The rubber sleeve 410 is close to the natural gas flow. A positioning ring 419 is connected to the moving side to limit the stroke of the push sleeve 415. An air collecting ring 414 is connected to the side of the push sleeve 415 closest to the natural gas flow, forming a windproof space with the push sleeve 415. A push seat 416 is evenly connected in a ring on the rubber soft sleeve 410 on one side of the push sleeve 415. A push plate 417 is hinged at the end of the push seat 416. A rubber block 418 is connected to the outside of the push plate 417. The push sleeve 415 is frustoconical in shape to gradually support and compress the push plate 417, changing its tilt angle.

[0047] When in use, the throttle tube 110 is inserted into the natural gas production pipe. At this time, the airbag ring 411 and spring 412 are deformed by pressure, providing a fixing effect. At the same time, the natural gas flow pushes the air collecting ring 414 and the push sleeve 415, causing them to squeeze the push plate 417, which changes the tilt angle of the push plate 417 and the rubber block 418 is squeezed onto the production pipeline.

[0048] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A natural gas well intelligent choke comprising a choke mechanism (1) including a choke pipe (110) with a gas flow chamber inside and a gas inlet (111) and a gas outlet (112) detachably connected at both ends of the choke pipe (110), characterized in that: A support plate (113) is connected to the inner surface of the throttling pipe (110). A hydraulic cylinder (114) is connected to the side of the support plate (113) near the outlet port of the throttling pipe (110). A blocking block (115) is connected to the extension rod of the hydraulic cylinder (114) for blocking and throttling the outlet port of the throttling pipe (110). The power supply mechanism (2) includes a protective sleeve (210), which is connected to the side of the support plate (113) near the air inlet port of the throttle tube (110) and has an open side. A lubrication sleeve (215) is connected to the open side of the protective sleeve (210), and the lubrication sleeve (215) has a cavity inside for holding flame-retardant grease lubricating oil. A small generator assembly (213) for power generation is sequentially connected inside the protective sleeve (210). The battery (212) and control components (211) are provided. The input shaft of the small generator assembly (213) extends through the opening of the protective sleeve (210) and the lubrication sleeve (215). A rubber ring is provided at the passage position of the lubrication sleeve (215) for sealing. A drive fan (214) is connected to the output shaft of the small generator assembly (213) outside the lubrication sleeve (215). The side of the lubrication sleeve (215) near the drive fan (214) is designed with an arc surface for airflow guidance. The air filtration mechanism (3) divides the throttle tube (110) on one side of the drive fan (214) into two sections, and the two sides of the air filtration mechanism (3) are connected to the two sections of the throttle tube (110). Applicable mechanism (4), which is disposed on the outside of the throttling tube (110).

2. The intelligent natural gas well choke of claim 1, wherein: The protective sleeve (210) is made of a hollow, heat-conducting material and is filled with water, which is half the volume of the cavity, for heat absorption. The cavity of the protective sleeve (210) is uniformly distributed with annular reinforcing plates to ensure the compressive strength of the protective sleeve (210).

3. The intelligent natural gas well choke of claim 2, wherein: An auxiliary frame (216) is movably sleeved on the outside of the input shaft of the small generator assembly (213) inside the lubrication sleeve (215) via a bearing for auxiliary support. An auxiliary rod (217) is evenly connected on the outside of the auxiliary frame (216), and the auxiliary rod (217) is connected to the inner surface of the cavity of the lubrication sleeve (215).

4. The intelligent natural gas well choke of claim 1, wherein: The air filtration mechanism (3) includes an installation ring (310). The two sides of the installation ring (310) are connected to the two sections of the throttling tube (110), and the interface is airtight with a rubber ring. A fixing ring (312) is provided inside the installation ring (310). A support ring (314) is connected inside the fixing ring (312), and an adsorption cylinder (315) is connected to one side of the support ring (314). The open position of the adsorption cylinder (315) is aligned with the air inlet port of the throttling tube (110). The inner wall of the adsorption cylinder (315) is coated with a paste adhesive, and a filter plate (316) is embedded on one side of the adsorption cylinder (315) at the position opposite to the drive fan (214) for airflow conduction.

5. The intelligent natural gas well choke of claim 4, wherein: The two sides of the mounting ring (310) are detachably connected to the two ends of the throttle tube (110) by threads. A blocking ring (311) is connected to the inner surface of the mounting ring (310) to block the fixing ring (312). A locking rod (317) is evenly connected to the blocking ring (311), and a locking hole (318) is opened on the fixing ring (312) that the locking rod (317) is aligned with to prevent the fixing ring (312) from rotating after installation. The distance between the blocking ring (311) and the side of the mounting ring (310) closest to it is the thickness of one fixing ring (312).

6. The intelligent natural gas well choke of claim 5, wherein: The inner surface of the adsorption tube (315) is uniformly connected with extension frames (319). The extension frames (319) are cross-shaped or star-shaped, and the center points of each extension frame (319) are not located on the same straight line. The surface of the extension frame (319) is coated with a paste adhesive.

7. The intelligent natural gas well choke of claim 1, wherein: The applicable mechanism (4) includes a rubber sleeve (410), which is movably sleeved on the surface of the throttle tube (110), and the inner surface of the rubber sleeve (410) is tightly fitted with the outer surface of the throttle tube (110). An airbag ring (411) is connected to the outer side of the rubber sleeve (410), and springs (412) are evenly distributed in a ring on the inner surface of the airbag ring (411). The thickness of the airbag ring (411) is at least two millimeters.

8. A natural gas well intelligent throttle device according to claim 7, characterized in that: A push sleeve (415) is slidably fitted onto the surface of the rubber sleeve (410). A positioning ring (419) is connected to the side of the rubber sleeve (410) near the natural gas flow to limit the stroke of the push sleeve (415). An air collecting ring (414) is connected to the side of the push sleeve (415) near the natural gas flow to form a windproof space with the push sleeve (415). A push seat (416) is uniformly connected in a ring shape on one side of the rubber sleeve (410) of the push sleeve (415). A push plate (417) is hinged at the end of the push seat (416). A rubber block (418) is connected to the outside of the push plate (417). The push sleeve (415) is frustoconical to gradually support and squeeze the push plate (417) to change its tilt angle.

Images