Non-stop production dynamic adjusting device for self-spraying oil producing well

Abstract

The utility model discloses a self-spraying oil production well non-stop production dynamic adjusting device which comprises an oil nozzle sleeve, the oil nozzle sleeve is provided with a first through opening, a second through opening and an oil outlet, the first through opening is provided with an oil nozzle seat, and a reducing oil nozzle assembly is arranged in the oil nozzle seat. The axis of the two-way opening coincides with the axis of the one-way opening, an adjusting rod is arranged in the two-way opening in an axial moving mode, a throttling section is arranged at the axial front end of the adjusting rod, and stepless adjustment of flow is achieved by controlling a gap between the throttling section and the reducing oil nozzle assembly. The length of the front end of the adjusting rod in the oil nozzle assembly is adjusted by enabling the adjusting rod to move left and right, the overflowing area and the overflowing length are also adjusted, the oil well production dynamic state can be conveniently and rapidly adjusted in a stepless mode under the condition that a well is not stopped, the workload of adjusting the oil nozzle is reduced, and remarkable benefits are achieved.

Description

Technical Field

[0001] This utility model relates to the field of petroleum development technology, specifically to a dynamic adjustment device for non-stop production of self-flowing oil wells. Background Technology

[0002] In flowing oil wells and submersible electric pump (SPMP) oil wells, nozzles are installed in the wellhead tree to regulate wellhead pressure and control oil production. The principle behind nozzle regulation of wellhead pressure and control of oil production is to create a throttling effect by allowing the well fluid to flow through a small diameter section, thus reducing pressure and production. Therefore, adjusting wellhead pressure and controlling oil production in the field involves adjusting the diameter of the nozzle's flow orifice. Oil well production dynamics are constantly changing, requiring frequent adjustments to the nozzle orifice diameter based on well conditions and production requirements. Current technology involves removing the used nozzle and replacing it with one of estimated required orifice diameters, repeating this process until the desired production is achieved. However, replacing nozzles currently requires closing valves before and after the nozzle, stopping well production before replacement. Therefore, nozzle adjustment is cumbersome, labor-intensive, and impacts oil well production. The following research was conducted by those skilled in the art.

[0003] Announcement No. CN114272774A discloses a two-stage adjustable fixed nozzle linear opening throttling device, including a side-detachable outer housing, a nozzle switching device, and a radial rotation throttling device. The nozzle switching device houses multiple sets of nozzles of different specifications, allowing for switching between different nozzle specifications as needed under operating conditions.

[0004] The existing technology uses multiple nozzles, resulting in high production costs.

[0005] Announcement No. CN203835333U discloses a direct-flow adjustable throttle, including a valve cover and a valve body connected to each other. The oil inlet on the valve cover and the oil outlet on the valve body correspond to each other and are coaxially arranged. A fixing plate fixed on the valve body is provided in the inner cavity formed by the valve cover and the valve body. An adjusting plate positioned by a balance shaft is provided on one side of the fixing plate. Both the fixing plate and the adjusting plate are provided with through holes, and the through holes on the fixing plate correspond to the oil outlet. The edge of the adjusting plate is engaged with a screw provided on one side of it. One end of the screw is connected to the rotating shaft of a handwheel extending out of the valve body.

[0006] In this existing technology, the screw position remains fixed, making it impossible for the operator to determine the opening status of the nozzle, thus affecting operational efficiency.

[0007] Publication No. CN117846552A discloses a multi-stage nozzle adjustment device and equipment for oil wells without interrupting production. The device includes a main body connected to a production channel; an outer central pipe is slidably connected inside the main body, and an oil passage is provided inside the outer central pipe, which is connected to the production channel; the outer central pipe has several stages of nozzles arranged radially, all of which are connected to the oil passage and the inner cavity of the main body; this device enables the selection of different nozzle sizes for different crude oil viscosities and the cleaning of the oil passage without interrupting oil well production.

[0008] The existing technology uses multiple nozzles, resulting in high production costs.

[0009] In summary, the technical solutions, technical problems to be solved, and beneficial effects of the above-disclosed technologies are all different from those of this utility model. For more technical features, technical problems to be solved, and beneficial effects of this utility model, the above-disclosed technical documents do not provide any technical inspiration. Utility Model Content

[0010] In order to overcome the shortcomings of the existing technology and solve at least one of the technical problems mentioned in the background art, this utility model provides a dynamic adjustment device for non-stop production of self-flowing oil wells.

[0011] To achieve the above objectives, the present invention adopts the following technical solution:

[0012] A dynamic adjustment device for continuous production control of a self-flowing oil well includes an oil nozzle sleeve with a first port, a second port, and an oil outlet. The first port has an oil nozzle seat, and a variable-diameter oil nozzle assembly is installed within the oil nozzle seat. The axis of the second port coincides with the axis of the first port. An adjusting rod is axially movable within the second port, and a throttling section is provided at the axially forward end of the adjusting rod. Stepless adjustment of the flow rate is achieved by controlling the gap between the throttling section and the variable-diameter oil nozzle assembly.

[0013] Furthermore, the variable diameter nozzle assembly includes a nozzle and a retaining sleeve;

[0014] Specifically, the inner wall of the nozzle seat is provided with a nozzle step facing the adjusting rod, the nozzle is seated on the nozzle step, and the fixing sleeve is connected to the inner wall of the nozzle seat at the rear end in the axial direction, and the fixing sleeve fixes the nozzle.

[0015] Specifically, the inner diameter of the grease nipple is smaller than the inner diameter of the fixed sleeve, the inner diameter of the grease nipple is smaller than the inner diameter of the grease nipple seat, and the inner wall of the grease nipple is provided with a first smooth transition surface at the axial rear end.

[0016] Specifically, the outer diameter of the throttling section is larger than the inner diameter of the nozzle, the outer diameter of the throttling section is smaller than the inner diameter of the fixed sleeve, and the throttling section has a third smooth transition surface at its axial front end.

[0017] Furthermore, the inner wall of the fixed sleeve is provided with a second smooth transition surface at the axial rear end.

[0018] Furthermore, the maximum inner diameter of the first smooth transition surface is equal to the inner diameter of the fixed sleeve.

[0019] Furthermore, the first smooth transition surface and the third smooth transition surface are conical surfaces with the same taper.

[0020] Furthermore, it also includes an adjusting nut, wherein the adjusting rod is a screw, and the adjusting rod includes a throttling section, a large-diameter section, and a driving section;

[0021] Specifically, the adjusting nut is connected to the two-way port of the oil nozzle sleeve, the adjusting rod passes through the adjusting nut, the large-diameter section is threadedly connected to the adjusting nut and sealed by a sealing assembly, and a limiting structure is provided between the adjusting rod and the adjusting nut.

[0022] Furthermore, the drive section is configured with a polyhedron that matches the socket wrench.

[0023] Furthermore, the large-diameter section is connected to the axial front end of the inner wall of the adjusting nut, and the sealing assembly includes a seal, a pressure sleeve, and a pressure cap;

[0024] Specifically, the inner wall of the adjusting nut is provided with a sealing step facing away from the oil nozzle sleeve, and a sealing element is placed on the sealing step to seal the large diameter section with the adjusting nut;

[0025] Specifically, a pressure sleeve is placed inside the adjusting nut at the end of the sealing element away from the oil nozzle sleeve;

[0026] Specifically, the outer wall of the adjusting nut is connected to a pressure cap at the end away from the oil nozzle sleeve. The pressure cap contacts the end face of the pressure sleeve to press and seal the sealing element.

[0027] Furthermore, the limiting structure comprises an inner limiting step and an outer limiting step;

[0028] Specifically, the large-diameter section is provided with an external threaded connection section at the axial front end, and the inner wall of the adjusting nut is provided with an internal threaded connection section at the axial front end. The external threaded connection section is provided with an outward limiting step, and the rear end of the internal threaded connection section is provided with an inner limiting step. The inner limiting step and the outer limiting step are arranged face to face to prevent the adjusting rod from being screwed in excessively.

[0029] Specifically, the inner diameter of the clamping cover is smaller than that of the large diameter section, the clamping cover is sleeved outside the drive section, and the clamping cover prevents the adjusting rod from being excessively rotated out.

[0030] Furthermore, the annular flow area between the fixed sleeve and the throttling section is smaller than the annular flow area of ​​the nozzle throttling orifice, and the driving section of the adjusting rod can be rotated out of the fixed sleeve.

[0031] Compared with the prior art, the present invention has the following advantages:

[0032] 1. This utility model allows the rotating adjusting rod to move left and right, thereby adjusting the length of its front end in the nozzle assembly, and thus adjusting the flow area and flow length. This enables convenient and rapid stepless adjustment of the oil well production dynamics without stopping the well, reducing the workload of nozzle adjustment and resulting in significant economic benefits.

[0033] 2. This utility model is applicable to the wellhead of self-flowing oil wells and submersible electric pump oil wells, and is used to control the production and formation pressure of the oil well. When in use, the production and formation pressure of the oil well can be steplessly adjusted without stopping the well by rotating the adjusting screw, without the need to stop production to replace the nozzle. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the structure of a dynamic adjustment device for non-stop production of a self-flowing oil well, which is a utility model.

[0035] In the diagram: 1. Oil nozzle seat; 2. Sealing ring; 3. Oil nozzle; 3-1. Throttling orifice; 3-2. First smooth transition surface; 4. Fixing sleeve; 4-1. Second smooth transition surface; 5. Oil nozzle sleeve; 5-1. Oil outlet; 5-2. Inner cavity; 6. Adjusting nut; 6-1. Inner limit step; 7. Seal; 8. Pressure sleeve; 9. Pressure cover; 10. Adjusting rod; 10-1. Throttling section; 10-2. Third smooth transition surface; 10-3. Large diameter section; 10-4. Drive section; 10-5. Outer limit step. Detailed Implementation

[0036] 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.

[0037] Example 1:

[0038] Please see Figure 1 This utility model provides a dynamic adjustment device for non-stop production of self-flowing oil wells, including an oil nozzle sleeve 5. The oil nozzle sleeve 5 is provided with a first port, a second port, and an oil outlet 5-1. An oil nozzle seat 1 is provided in the first port. A variable diameter oil nozzle assembly is provided in the oil nozzle seat 1. The axis of the second port coincides with the axis of the first port. An adjusting rod 10 is axially movable in the second port. A throttling section 10-1 is provided at the axial front end of the adjusting rod 10. The flow rate is steplessly adjusted by controlling the gap between the throttling section 10-1 and the variable diameter oil nozzle assembly.

[0039] Specifically, the nozzle seat 1 and the nozzle sleeve 5 are connected by threads and a sealing ring 2 is provided to ensure that there is no leakage at the connection.

[0040] Specifically, the nozzle sleeve 5 has a clamp connector at one end of the nozzle seat 1, which can be connected to the wellhead via the clamp. The nozzle sleeve 5 is tubular, and an oil outlet 5-1 is provided on the side of the nozzle sleeve 5. The oil outlet 5-1 has a connecting thread inside, which can maintain a seal after being connected to the field oil outlet pipe. The inner cavity 5-2 of the nozzle sleeve 5 is connected to the outside through the oil outlet 5-1. The inner cavity 5-2 is connected to the wellhead via a variable diameter nozzle assembly.

[0041] Furthermore, the variable diameter nozzle assembly includes a nozzle 3 and a fixing sleeve 4. The inner wall of the nozzle seat 1 is provided with a nozzle step facing the adjusting rod 10. The nozzle 3 is seated on the nozzle step. The fixing sleeve 4 is threadedly connected to the inner wall of the nozzle seat 1 at the rear end in the axial direction. The fixing sleeve 4 fixes the nozzle 3. The inner diameter of the nozzle 3 is smaller than the inner diameter of the fixing sleeve 4 and the inner diameter of the nozzle 3 is smaller than the inner diameter of the nozzle seat 1. The inner wall of the nozzle 3 is provided with a first smooth transition surface 3-2 at the rear end in the axial direction. The outer diameter of the throttling section 10-1 is larger than the inner diameter of the nozzle 3 and smaller than the inner diameter of the fixing sleeve 4. The throttling section 10-1 is provided with a third smooth transition surface 10-2 at the front end in the axial direction.

[0042] Specifically, stepless adjustment is achieved by controlling the distance between the third smooth transition surface 10-2 and the first smooth transition surface 3-2. When the flow area between the third smooth transition surface 10-2 and the first smooth transition surface 3-2 is greater than or equal to the annular flow area between the fixed sleeve 4 and the throttling section 10-1 or the flow area of ​​the throttling orifice 3-1 in the nozzle 3, the maximum opening is reached. The smaller flow area in the annular space and the throttling orifice 3-1 is the maximum opening.

[0043] Specifically, the inner wall of the fixed sleeve 4 is provided with a second smooth transition surface 4-1 at the axial rear end, which facilitates the assembly of the adjusting rod 10.

[0044] Specifically, the maximum inner diameter of the first smooth transition surface is equal to the inner diameter of the fixed sleeve 4.

[0045] The fixing sleeve 4 presses down on the oil nozzle 3, keeping the oil nozzle 3 stationary. The oil nozzle 3 is pressed tightly against the oil nozzle step of the oil nozzle seat 1, thus achieving end face sealing.

[0046] Preferably, the first smooth transition surface 3-2 and the third smooth transition surface 10-2 are conical surfaces with the same taper.

[0047] Furthermore, it also includes an adjusting nut 6, and the adjusting rod 10 is a screw rod. The adjusting rod 10 includes a throttling section 10-1, a large-diameter section 10-3, and a driving section 10-4. The adjusting nut 6 is connected to the two-way port of the oil nozzle sleeve 5 through a sealing oil pipe thread. The adjusting rod 10 passes through the adjusting nut 6. The large-diameter section 10-3 is threadedly connected to the adjusting nut 6 and sealed by a sealing assembly. A limiting structure is provided between the adjusting rod 10 and the adjusting nut 6.

[0048] Rotating the adjusting screw 10 allows it to move on the adjusting nut 6. The sealing mechanism seals the gap between the adjusting nut 6 and the adjusting screw 10, preventing fluid leakage from the inner cavity 5-2.

[0049] Specifically, the drive section 10-4 is provided with a polyhedron that matches the socket wrench.

[0050] Specifically, the large-diameter section 10-3 is connected to the axial front end of the inner wall of the adjusting nut 6. The sealing assembly includes a sealing element 7, a pressure sleeve 8, and a pressing cover 9. The inner wall of the adjusting nut 6 is provided with a sealing step facing away from the oil nozzle sleeve 5. The sealing element 7 is placed on the sealing step. The sealing element 7 seals the large-diameter section 10-3 with the adjusting nut 6. The pressure sleeve 8 is placed inside the adjusting nut 6 at the end of the sealing element 7 away from the oil nozzle sleeve 5. The pressing cover 9 is threadedly connected to the outer wall of the adjusting nut 6 at the end away from the oil nozzle sleeve 5. The pressing cover 9 contacts the end face of the pressure sleeve 8 and presses the sealing element 7.

[0051] Specifically, the limiting structure consists of an inner limiting step 6-1 and an outer limiting step 10-5. The large-diameter section 10-3 has an external threaded connection section at its axial front end, and the inner wall of the adjusting nut 6 has an internal threaded connection section at its axial front end. The external threaded connection section is connected to the internal threaded connection section. The external threaded connection section faces the outer limiting step 10-5, and the rear end of the internal threaded connection section has an inner limiting step 6-1. The inner limiting step 6-1 and the outer limiting step 10-5 are arranged face-to-face to prevent the adjusting rod 10 from being excessively screwed in and damaging the oil nozzle 3. The inner diameter of the clamping cover 9 is smaller than that of the large-diameter section 10-3. The clamping cover 9 is sleeved on the outside of the drive section 10-4. The clamping cover 9 prevents the adjusting rod 10 from being excessively screwed out, so that the adjusting rod 10 will not come out of the adjusting nut 6.

[0052] In this embodiment, the opening state of the nozzle 3 can be determined based on the external leakage length of the drive section 10-4. By clamping the drive section 10-4 with a wrench and rotating the adjusting rod 10, the adjusting rod 10 moves away from or closer to the nozzle 3 under the limit of the adjusting nut 6, so that the flow area between the third smooth transition surface 10-2 and the first smooth transition surface 3-2 changes, thereby realizing the regulation of production and wellhead pressure.

[0053] This invention allows for the adjustment of oil well production and pressure without shutting down the well, and can be adjusted at any time to ensure that the oil well produces under reasonable operating conditions and to guarantee stable production in the oil field.

[0054] Example 2:

[0055] Based on Example 1, in this example, the annular flow area between the fixed sleeve 4 and the throttling section 10-1 is smaller than the annular flow area of ​​the throttling orifice 3-1 of the nozzle 3, and the driving section 10-4 of the adjusting rod 10 can be rotated out of the fixed sleeve 4.

[0056] The first smooth transition surface 3-2, the second smooth transition surface 4-1, and the third smooth transition surface 10-2 are conical surfaces with the same taper.

[0057] The device achieves stepless adjustment by controlling the distance between the third smooth transition surface 10-2 and the first smooth transition surface 3-2 and the second smooth transition surface 4-1. When the flow area between the third smooth transition surface 10-2 and the first smooth transition surface 3-2 is greater than or equal to the annular flow area between the fixed sleeve 4 and the throttling section 10-1, the device is in the first gear. If the adjusting rod 10 is rotated out, the flow area remains unchanged first and then is steplessly adjusted. When the flow area between the third smooth transition surface 10-2 and the second smooth transition surface 4-1 is greater than or equal to the area of ​​the throttling orifice 3-1 inside the nozzle 3, the device is in the second gear.

[0058] This embodiment can achieve stepless adjustment and also has preset gears. When a preset gear is needed, it can be quickly and coarsely adjusted to the preset gear, thus improving work efficiency.

[0059] All components not discussed in detail in this application, as well as the connection methods of these components, are well-known technologies in this field. They can be directly applied and will not be elaborated further.

[0060] In this utility model, the term "multiple" refers to two or more unless otherwise explicitly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0061] In the description of this utility model, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0062] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above 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 one or more embodiments or examples.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A dynamic adjustment device for continuous production of a self-flowing oil well, comprising an oil nozzle sleeve, wherein the oil nozzle sleeve is provided with a first port, a second port, and an oil outlet, and the first port is provided with an oil nozzle seat, characterized in that, A variable diameter nozzle assembly is provided inside the nozzle holder; The axis of the second port coincides with the axis of the first port. An adjusting rod is axially movable inside the second port. A throttling section is provided at the front end of the adjusting rod. The flow rate is steplessly adjusted by controlling the gap between the throttling section and the variable diameter nozzle assembly.

2. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 1, characterized in that, The variable diameter nozzle assembly includes a nozzle and a retaining sleeve; The inner wall of the nozzle seat is provided with a nozzle step facing the adjusting rod, the nozzle is seated on the nozzle step, and the fixing sleeve is connected to the inner wall of the nozzle seat at the rear end in the axial direction, and the fixing sleeve fixes the nozzle. The inner diameter of the grease nipple is smaller than the inner diameter of the fixed sleeve, and the inner diameter of the grease nipple is smaller than the inner diameter of the grease nipple seat. The inner wall of the grease nipple is provided with a first smooth transition surface at the axial rear end. The outer diameter of the throttling section is larger than the inner diameter of the nozzle, and the outer diameter of the throttling section is smaller than the inner diameter of the fixed sleeve. The throttling section has a third smooth transition surface at its axial front end.

3. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 2, characterized in that, The inner wall of the fixed sleeve is provided with a second smooth transition surface at the axial rear end.

4. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 2, characterized in that, The maximum inner diameter of the first smooth transition surface is equal to the inner diameter of the fixed sleeve.

5. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 2, characterized in that, The first and third smooth transition surfaces are conical surfaces with the same taper.

6. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 2, characterized in that, It also includes an adjusting nut, and the adjusting rod is a screw rod, which includes a throttling section, a large-diameter section, and a driving section; The adjusting nut is connected to the two-way port of the oil nozzle sleeve, the adjusting rod passes through the adjusting nut, the large-diameter section is threadedly connected to the adjusting nut and sealed by a sealing assembly, and a limiting structure is provided between the adjusting rod and the adjusting nut.

7. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 6, characterized in that, The drive section is configured with a polyhedron that is compatible with the socket wrench.

8. The dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 6, characterized in that, The large-diameter section is connected to the axial front end of the inner wall of the adjusting nut, and the sealing assembly includes a sealing element, a pressure sleeve, and a pressure cap; The inner wall of the adjusting nut is provided with a sealing step facing away from the oil nozzle sleeve, and a sealing element is placed on the sealing step to seal the large diameter section with the adjusting nut. A pressure sleeve is placed at the end of the internal sealing element of the adjusting nut that is away from the oil nozzle sleeve; The outer wall of the adjusting nut is connected to a pressure cap at the end away from the oil nozzle sleeve. The pressure cap contacts the end face of the pressure sleeve to press and seal the component.

9. A dynamic adjustment device for non-stop production of a self-flowing oil well according to claim 8, characterized in that, The limiting structure consists of an inner limiting step and an outer limiting step. The large-diameter section is provided with an external threaded connection section at the axial front end, and the inner wall of the adjusting nut is provided with an internal threaded connection section at the axial front end. The external threaded connection section is provided with an outward limiting step, and the rear end of the internal threaded connection section is provided with an inner limiting step. The inner limiting step and the outer limiting step are arranged face to face to prevent the adjusting rod from being screwed in excessively. The inner diameter of the clamping cover is smaller than that of the large diameter section. The clamping cover is sleeved on the outside of the drive section. The clamping cover prevents the adjusting rod from being excessively rotated out.

10. A dynamic adjustment device for continuous production regulation of a self-flowing oil well according to claim 3, characterized in that, The annular flow area between the fixed sleeve and the throttling section is smaller than the annular flow area of ​​the nozzle throttling orifice, and the driving section of the adjusting rod can be rotated out of the fixed sleeve.

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