Horizontal large-volume high-pressure filter and wellhead production equipment

Abstract

The utility model provides a horizontal high -pressure filter of large capacity and wellhead oil well wellhead production equipment, the filter includes pressure bearing outer tube, filter core and connector in pressure bearing outer tube, the filter core includes the oil pipe and sets up on the filter core eye -spotted on the pipe wall, the connector includes import and export, is located in pressure bearing outer tube's both ends respectively. The utility model changes the current wellhead technological process, changes two stage throttling for primary oil nozzle throttling, thick oil, rock fragment and other impurities in the produced liquid are cleaned after primary throttling through the filter of the utility model, then the yield is controlled through two stage throttling oil nozzle, and the continuous production of oil well can be realized under the condition that the pressure is reduced to below 4MPa. 1) thick oil block and other impurities greater than the diameter of oil nozzle in the produced liquid are effectively filtered. 2) the abnormal frequency of super thick oil well is effectively reduced, and the cost of processing abnormality is reduced. 3) the safety risk of unfinishable pressure during the period of checking and replacing oil nozzle is reduced. 4) the labor intensity of staff is reduced.

Description

Technical Field

[0001] This utility model relates to oil wellhead process equipment, specifically to a horizontal large-capacity high-pressure filter and wellhead oil wellhead production equipment. Background Technology

[0002] Due to the high density, high viscosity, poor mixing, and poor fluidity of extra-heavy oil wells, a dual approach of heating with insulated cables and dilution is typically employed for extraction. However, during production, frequent blockages of the nozzles due to heavy oil lumps require cleaning every hour, the pressure difference between the oil casing and nozzle is less than 1 MPa, and the surface process cannot achieve continuous production conditions. This results in high labor intensity for on-site workers and severely impacts normal production. Furthermore, the frequent nozzle inspections and replacements, coupled with nozzle blockages and incomplete pressure relief, greatly increase the risk of injuries, significantly complicating on-site safety measures. Utility Model Content

[0003] To address the problems of uneven mixing of light and heavy oil in oil wells, frequent production of heavy oil blocks, frequent blockage of the wellhead nozzles, and inability to produce oil continuously, this utility model provides a horizontal large-capacity high-pressure filter and wellhead production equipment for oil wells.

[0004] The technical solution of this utility model is as follows:

[0005] A horizontal large-capacity high-pressure filter is characterized by comprising a pressure-bearing outer cylinder, a filter element located inside the pressure-bearing outer cylinder, and a connector. The filter element includes an oil pipe and filter element holes disposed on the pipe wall. The connector includes an inlet and an outlet, respectively located at both ends of the pressure-bearing outer cylinder.

[0006] Preferably, the pressure-bearing outer cylinder is a Φ133 high-pressure pipeline with a pressure of 60MPa.

[0007] A further preferred length is 1000-2000mm.

[0008] Preferably, the outer diameter of the oil pipe is Φ89, and the pressure resistance is ≥70MPa.

[0009] Preferably, the filter element has a mesh size of 8-10 mesh and two mesh sizes with diameters of 3.5 and 4 mm.

[0010] Preferably, the outer wall of the oil pipe is uniformly designed with four straightening supports, and the filter element is always centered inside the outer cylinder.

[0011] Preferably, the connector is a clamp head, the inlet can be connected to a ground pipeline, the outlet can be connected to a high-pressure oil nozzle sleeve, and connected to the inlet pipeline.

[0012] More preferably, the inlet is located on the side of one end of the pressure-bearing outer cylinder, and the filter element is provided with a keyway hole below the corresponding inlet, and a seal is provided between the pressure-bearing outer cylinder and the filter element on both sides of the keyway hole.

[0013] More preferably, the sealing is configured such that a sealing ring is provided on the side of the keyway hole facing the outlet, and the other side is provided as the filter element combined with the plug for sealing connection to the end of the pressure-bearing outer cylinder.

[0014] A wellhead production device for oil wells, characterized by comprising a two-stage throttling system, wherein the first-stage throttling system employs a tree needle valve and the second-stage throttling system employs any of the aforementioned horizontal large-capacity high-pressure filters.

[0015] The beneficial technical effects of this utility model are as follows:

[0016] Based on field analysis and research, this utility model modifies the current wellhead process by changing the primary throttling nozzle to a secondary throttling nozzle. The primary throttling is achieved through a tree needle valve, reducing the well pressure from over 30 MPa to below 24.5 MPa. Then, a self-developed high-pressure-bearing horizontal large-capacity filter is used to clean impurities such as heavy oil and rock cuttings from the produced fluid. Finally, the secondary throttling nozzle controls the production, reducing the pressure to below 4 MPa to achieve continuous production from the well. The independently developed horizontal high-pressure filter consists of three parts: the first part is the outer cylinder, which uses a 1000mm Φ133 high-pressure pipeline with a pressure resistance of 60MPa; the second part is the internal filter element, which uses an 89mm outer diameter and 800mm long oil pipe to ensure sufficient volume for storing impurities. The filter element has a mesh size of 8-10 mesh, with pore sizes of 3.5mm and 4mm. Four evenly distributed support bars are designed on the outside of the filter element to ensure that it remains centered inside the outer cylinder, thus ensuring the fluid passage on the outside of the filter element; the third part is the connector, which uses a special high-pressure clamp connection. The inlet is connected to the ground pipeline, and the outlet is connected to the high-pressure nozzle sleeve using a clamp connection, and is also connected to the inlet pipeline. This ensures normal production during filter element cleaning, extends the continuous production time of the oil well from once per hour to once every 10-12 hours, greatly reduces the labor intensity of on-site employees, and eliminates the safety hazard of injury caused by residual pressure not being completely released during nozzle cleaning after nozzle blockage.

[0017] Specific advantages: 1) Effectively filters out heavy oil lumps and other impurities larger than the nozzle diameter in the produced fluid. 2) Effectively reduces the frequency of anomalies in extra-heavy oil wells, reducing the costs of special vehicles, labor, and pollution control for handling anomalies. 3) Reduces the safety risk of incomplete pressure relief during nozzle inspection and replacement. 4) Reduces the workload of employees. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a horizontal large-capacity high-pressure filter used in an embodiment of the present invention.

[0019] The labels in the diagram are listed below:

[0020] 1-Pressure-bearing outer cylinder, 2-Filter element, 3-Oil pipe, 4-Filter element hole, 5-Inlet, 6-Outlet, 7-Keyway hole, 8-Sealing ring, 9-Threaded plug, 10-Fixing cylindrical pin, 11-T-slot, 12-Reducing joint. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings. The preferred embodiments of the present invention are shown below. It should be understood that those skilled in the art can modify the present invention described herein while still achieving the beneficial effects of the present invention. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the present invention.

[0022] It should be noted that the accompanying drawings are all in a very simplified form and use non-precise ratios, and are only used for the purpose of conveniently and clearly illustrating the embodiments of this utility model.

[0023] Example

[0024] This embodiment describes an oil wellhead production device employing a horizontal, large-capacity, high-pressure filter. It replaces the existing single-stage throttling technology with a two-stage throttling system. First, the pressure is reduced from above 30 MPa to below 24 MPa after the first-stage throttling via the tree trunk needle valve, and then the pressure enters... Figure 1 The two-stage throttling horizontal large-capacity high-pressure filter shown filters out heavy oil lumps and other impurities in the product fluid and stores them inside the filter. By changing the throttling method, the production process is changed.

[0025] The filter includes a pressure-bearing outer cylinder 1, a filter element 2 located inside the pressure-bearing outer cylinder 1, and a connector. The filter element includes an oil pipe 3 and filter element holes 4 set on the pipe wall. The connector includes an inlet 5 and an outlet 6, which are located at the two ends of the pressure-bearing outer cylinder 1, respectively.

[0026] The pressure-bearing outer cylinder 1 uses a Φ133 high-pressure pipeline with a pressure of 60MPa and a length of 1000mm to ensure sufficient volume. The oil pipe has an outer diameter of Φ89, a length of 800mm, and a pressure of ≥70MPa. The filter element has a mesh size of 8-10 mesh, and the mesh size is available in two sizes: 3.5mm and 4mm in diameter.

[0027] The outer wall of the oil pipe is uniformly designed with four straightening supports (not shown in the figure) to ensure that the filter element 2 is always centered inside the pressure-bearing outer cylinder 1.

[0028] The connector uses a clamp head and a steel ring seal, allowing for quick and easy disassembly. It also features a one-for-one backup design to ensure uninterrupted oil well production during filter cleaning. Inlet 5 can be connected to surface pipelines, and outlet 6 can be connected to a high-pressure nozzle sleeve and the inlet pipeline.

[0029] Preferred, such as Figure 1 As shown, the inlet 5 is located on the side of one end of the pressure-bearing outer cylinder. The filter element 2 has a keyway hole 7 below the corresponding inlet, and a seal is provided between the pressure-bearing outer cylinder and the filter element on both sides of the keyway hole 7. Specifically, the seal is provided as follows: a sealing ring 8 is provided on the side of the keyway hole 7 facing the outlet, which, together with the side wing of the clamp head, achieves a complete seal; on the other side, the filter element 2 is sealed to the end of the pressure-bearing outer cylinder 1 by means of a plug 9. The plug 9 is detachably connected to the filter element 2 and the hexagonal structure through a fixing cylindrical pin 10 and a T-slot 11. Before the outlet 6, the pressure-bearing outer cylinder 1 and the clamp head are connected by a reducing joint 12.

[0030] The produced fluid flows out of the filter after exiting through the Φ3.5-4mm filter element orifice 4, and then flows into the downstream production process through the Φ4-5mm nozzle. This ensures that the produced fluid flowing through the nozzle is free of heavy oil lumps and impurities larger than the nozzle orifice. During filter cleaning, simply emptying the spare filter is sufficient to relieve pressure and clean the filter; the well does not need to be shut down, ensuring continuous production from the well.

[0031] This embodiment ensures normal production during filter cleaning, extends the continuous production time of the oil well, and extends the filter cleaning from once every hour to once every 10-12 hours. This greatly reduces the labor intensity of on-site employees and eliminates the safety hazard of injury caused by residual pressure not being completely released during the cleaning of clogged nozzles.

[0032] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Therefore, the above description is merely an embodiment of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Without departing from the spirit and scope of this utility model, various equivalent changes and modifications are also included, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A horizontal, large-capacity high-pressure filter, characterized in that... The system includes a pressure-bearing outer cylinder, a filter element located inside the pressure-bearing outer cylinder, and a connector. The filter element includes an oil pipe and filter element holes set on the pipe wall. The connector includes an inlet and an outlet, located at both ends of the pressure-bearing outer cylinder. The pressure-bearing outer cylinder is a 1000mm Φ133 high-pressure pipeline with a pressure of 60MPa. The filter element is an oil pipe with an outer diameter of Φ89mm and a length of 800mm. The filter element has a mesh size of 8-10 mesh and two hole sizes: 3.5mm and 4mm. The filter element has four evenly spaced support bars on its exterior. The inlet of the connector is connected to the ground pipeline by a clamp, and the outlet is connected to the high-pressure oil nozzle sleeve by a clamp and connected to the inlet pipeline.

2. A horizontal large-capacity high-pressure filter according to claim 1, characterized in that... The pressure-bearing outer cylinder is made of a Φ133 high-pressure pipeline with a pressure rating of 60MPa.

3. A horizontal large-capacity high-pressure filter according to claim 2, characterized in that... The length is 1000-2000mm.

4. A horizontal large-capacity high-pressure filter according to claim 1, characterized in that... The oil pipe has an outer diameter of Φ89mm and a pressure resistance of ≥70MPa.

5. A horizontal large-capacity high-pressure filter according to claim 1, characterized in that... The filter element has a mesh size of 8-10 mesh, and the mesh size is available in two sizes: 3.5 mm and 4 mm in diameter.

6. A horizontal large-capacity high-pressure filter according to claim 1, characterized in that... The outer wall of the oil pipe is uniformly designed with four straightening supports, and the filter element is always centered inside the outer cylinder.

7. A horizontal large-capacity high-pressure filter according to claim 1, characterized in that... The connector uses a clamp head. The inlet can be connected to the ground pipeline, and the outlet can be connected to the high-pressure oil nozzle sleeve and the inlet pipeline.

8. A horizontal large-capacity high-pressure filter according to claim 7, characterized in that... The inlet is located on the side of one end of the pressure-bearing outer cylinder, and the filter element is provided with a keyway hole below the corresponding inlet. A seal is provided between the pressure-bearing outer cylinder and the filter element on both sides of the keyway hole.

9. A horizontal large-capacity high-pressure filter according to claim 8, characterized in that... The sealing method is as follows: a sealing ring is set on the side of the keyway hole facing the outlet, and the other side is set as the filter element combined with the plug to seal the end of the pressure-bearing outer cylinder.

10. A wellhead production device for oil wells, characterized in that... It includes a two-stage throttling system. The first-stage throttling system uses a tree needle valve, and the second-stage throttling system uses a horizontal large-capacity high-pressure filter as described in any one of claims 1-9.

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