Physical desorption silt prevention screw oil extraction system

Abstract

The invention belongs to the technical field of oil field oil extraction equipment, and particularly discloses a physical desorption silt prevention screw oil extraction system which comprises a screw pump body, a silt prevention assembly and a control unit. The screw pump body sequentially comprises a first oil chamber, a second oil chamber and a transmission chamber, the silt prevention assembly is arranged in the first oil chamber and the second oil chamber, and the control unit is electrically connected with the screw pump body and the silt prevention assembly. According to the physical desorption silt prevention screw oil extraction system, silt prevention of the screw pump is achieved through the physical desorption effect and the spiral flow guide silt prevention structure, so that the problem that the pump efficiency is reduced due to sediment attachment is solved, the service life of equipment is prolonged, and the oil extraction efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the technical field of oilfield production equipment, specifically relating to a physical desorption anti-siltation screw oil production system. Background Technology

[0002] In the field of oil extraction, screw oil production systems have become one of the important oil production equipment due to their excellent adaptability to complex conditions such as high viscosity and high sand content crude oil, and are widely used in the development of various oil and gas fields. However, existing screw oil production systems generally face a series of technical challenges that affect their efficient and stable operation during long-term operation.

[0003] First, the problem of sediment adhesion is prominent. Components in crude oil, such as waxes, asphaltene, and formation sand particles, are easily adsorbed and deposited on the screw surface during the relative movement of the screw and pump barrel and during crude oil transportation. Over time, these sediments gradually thicken, reducing the clearance between the screw and pump barrel. This not only increases equipment operating resistance and reduces pump efficiency, but in severe cases, it can also cause pump jamming, leading to oil production interruptions and significantly increasing equipment maintenance costs and production delays.

[0004] Secondly, existing anti-siltation technologies have significant limitations. To address sediment adhesion issues, the industry has developed various traditional anti-siltation methods, but all have insurmountable drawbacks. While the application of chemical unblocking agents can alleviate sedimentation problems to some extent, their extensive use not only leads to high operating costs but also easily pollutes the formation and surrounding ecological environment, contradicting the concept of green mining. Some systems employ passive cleaning structures such as coolant spraying, but their cleaning actions lack specificity and cannot dynamically respond to the real-time sediment adhesion status, making it difficult to fundamentally prevent the continuous formation and adhesion of sediments, thus limiting their anti-siltation effectiveness.

[0005] Furthermore, the lack of intelligent monitoring further exacerbates the inadequacy of anti-siltation effects. Current technologies rely heavily on manual inspections or monitoring of single operating parameters to monitor the state of sediment on the screw surface, making it difficult to comprehensively, in real-time, and accurately reflect the distribution and growth trend of sediment. This monitoring method prevents anti-siltation strategies from being dynamically adjusted according to actual operating conditions, often resulting in either "over-treatment" or "under-treatment," severely restricting the effectiveness and economy of anti-siltation measures.

[0006] Therefore, there is a need in this field to develop a physical desorption anti-siltation screw oil production system that can effectively solve the above problems. Summary of the Invention

[0007] The purpose of this invention is to provide a physical desorption anti-sludge screw oil production system. This system achieves anti-sludge treatment of the screw pump through physical desorption and a spiral flow guiding anti-sludge structure, thereby avoiding the problem of reduced pump efficiency caused by sediment adhesion, extending the service life of the equipment and improving oil production efficiency.

[0008] To achieve the above objectives, the present invention provides a physical desorption anti-silting screw oil production system, including a screw pump body, an anti-silting component, and a control unit; the screw pump body includes a first oil chamber, a second oil chamber, and a transmission chamber in sequence, the anti-silting component is disposed in the first oil chamber and the second oil chamber, and the control unit is electrically connected to the screw pump body and the anti-silting component respectively.

[0009] Preferably, the first oil chamber contains a rotor and a stator, the stator is embedded in the first oil chamber, and its inner wall has a helical cavity that matches the rotor helix; the rotor is located inside the stator. The first oil chamber has a discharge port at the end furthest from the second oil chamber, and the discharge port is connected to one end of the rotor through a tubular column.

[0010] Preferably, the second oil chamber is equipped with a rotating shaft with a feed inlet at its top; the transmission chamber is equipped with a transmission shaft, with the rotor and the transmission shaft connected to its two ends respectively; a motor is provided at the end of the transmission chamber away from the second oil chamber, and the output end of the motor is connected to the transmission shaft.

[0011] Preferably, the anti-sludge component includes a sensor, an ultrasonic transducer, and an electromagnetic coil. The sensor is evenly distributed on the outer wall of the rotor, the feed inlet, and the discharge outlet; the ultrasonic transducer is distributed on the outer wall of the rotor, and the electromagnetic coil is distributed on the inner wall of the stator.

[0012] Preferably, the control unit includes a data processing module and a control module.

[0013] The present invention employs the above-mentioned physical desorption anti-siltation screw oil production system, and its beneficial effects are as follows: (1) The screw oil production system in this invention has a significant anti-siltation effect, and the amount of sediment attached inside can be reduced by 70%-90%, and the pump inspection cycle can be extended by 2-3 times.

[0014] (2) By using the screw oil production system in this invention, good economic benefits have been achieved, maintenance costs can be reduced, and the overall oil production efficiency can be increased by 15%-20%.

[0015] (3) The anti-sludge method of the screw oil production system in this invention completely replaces chemical unblocking agents, reduces carbon emissions by more than 30%, and has good environmental protection.

[0016] (4) The screw oil production system in this invention fundamentally solves the technical problem of screw pump blockage through the synergistic integration of physical field desorption, structural optimization and intelligent control, and can provide an efficient and green technical solution for the exploitation of oil reservoirs with high wax and high sand content.

[0017] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a physical desorption anti-siltation screw oil production system of the present invention; Figure 2 This is a schematic diagram of a portion of the rotor structure in an embodiment of a physical desorption anti-siltation screw oil production system of the present invention; Figure 3 This is a partial structural diagram of the stator in an embodiment of a physical desorption anti-siltation screw oil production system of the present invention.

[0019] Figure Labels 1. First oil chamber; 2. Second oil chamber; 3. Transmission chamber; 4. Rotor; 5. Stator; 6. Discharge port; 7. Rotating shaft; 8. Feed port; 9. Transmission shaft; 10. Motor; 11. Sensor; 12. Ultrasonic transducer; 13. Electromagnetic coil. Detailed Implementation

[0020] The technical solution of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0022] 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 illustrative and non-limiting in all respects, 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, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0023] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. These other embodiments are also covered within the scope of protection of this invention.

[0024] It should also be understood that the specific embodiments described above are only used to explain the present invention, and the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0025] The terms "comprising" or "including" as used in this invention mean that the element preceding the term encompasses the element listed after the term, and do not exclude the possibility of encompassing other elements. Terms such as "inner," "outer," "upper," and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element 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 the invention. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In this invention, unless otherwise explicitly specified and limited, the term "attached" and similar terms should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two elements or the interaction relationship between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] All terms used in this disclosure (including technical or scientific terms) have the same meaning as understood by one of ordinary skill in the art to which this disclosure pertains, unless otherwise specifically defined. It should also be understood that terms as defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as being interpreted with idealized or highly formalized meanings, unless expressly defined herein. Techniques, methods, and apparatus known to one of ordinary skill in the art may not be discussed in detail, but where appropriate, such techniques, methods, and apparatus should be considered part of the specification.

[0027] Example like Figure 1 As shown, a physical desorption anti-siltation screw oil recovery system includes a screw pump body, an anti-siltation component, and a control unit on the ground. The control unit includes a data processing module and a control module. The control unit is electrically connected to the screw pump body and the anti-siltation component. The control unit predicts the amount of sediment adhesion through machine learning algorithms, supports remote parameter adjustment, and thus monitors pump efficiency and sediment thickness in real time.

[0028] The screw pump body sequentially includes a first oil chamber 1, a second oil chamber 2, and a transmission chamber 3. The first oil chamber 1 houses a rotor 4 and a stator 5, with the stator 5 embedded within it. The stator 5 has a helical cavity on its inner wall that matches the helix of the rotor 4. The rotor 4 is located inside the stator 5. A discharge port 6 is located at the end of the first oil chamber 1 furthest from the second oil chamber 2, and the discharge port 6 is connected to one end of the rotor 4 via a tubing column. A rotating shaft 7 is located in the second oil chamber 2, with a feed inlet 8 at its top. A transmission shaft 9 is located in the transmission chamber 3, with the rotor 4 and the transmission shaft 9 connected to both ends of the rotating shaft 7, respectively. A motor 10 is located at the end of the transmission chamber 3 furthest from the second oil chamber 2, and the output end of the motor 10 is connected to the transmission shaft 9.

[0029] When the motor 10 is started, the transmission shaft 9 drives the rotating shaft 7 and the rotor 4 to rotate, thereby drawing the oil into the internal cavity of the second oil chamber 2 and into the oil passage between the stator 5 and the rotor 4 to be extracted.

[0030] The anti-sludge assembly is located in the first oil chamber 1 and the second oil chamber 2. The anti-sludge assembly includes sensors 11, ultrasonic transducers 12, and electromagnetic coils 13. Sensors 11 are evenly distributed on the outer wall of the rotor 4, the feed inlet 8, and the discharge outlet 6. Sensors 11 are multi-parameter sensors, including fiber optic grating sensors to monitor screw deformation, capacitive sensors to detect deposit thickness in real time, and pressure sensors to monitor the pressure difference at the feed inlet 8 and the discharge outlet 6. All sensors are flat, embedded, or curved and fitted. The multi-parameter sensors 11 are used to monitor the deformation of the rotor 4, the deposit thickness on the outer wall of the rotor 4, and the pump pressure difference. By monitoring and intelligently adjusting system parameters through the multi-parameter sensors 11, real-time anti-sludge measures can be achieved, thereby effectively improving oil production efficiency and reducing maintenance costs.

[0031] like Figure 2 As shown, the ultrasonic transducer 12 is located on the outer wall of the rotor 4. The ultrasonic transducer 12 works in conjunction with an ultrasonic generator, which can be located in a control unit on the ground and connected over long distances via a dedicated high-frequency cable. During operation, crude oil enters the screw pump, and the control unit controls the ultrasonic transducer 12, causing micro-displacement of the sediment. Figure 3 As shown, the electromagnetic coil 13 is located on the inner wall of the stator 5. The control unit supplies alternating current to the electromagnetic coil 13, generating an alternating magnetic field around the screw, causing polarized sediments to separate and detach from the screw. Through the synergistic effect of ultrasonic vibration and the alternating magnetic field, the adhesion of the sediments is disrupted, leading to sediment separation and thus achieving dynamic desorption of the sediments, improving pump efficiency.

[0032] Therefore, the present invention adopts the above-mentioned physical desorption anti-sludge screw oil production system. The system achieves anti-sludge treatment of the screw pump through physical desorption and spiral flow guiding anti-sludge structure, thereby avoiding the problem of reduced pump efficiency caused by sediment adhesion, extending the service life of the equipment and improving oil production efficiency.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A physical desorption anti-siltation screw oil production system, characterized in that: It includes a screw pump body, an anti-sludge component, and a control unit; the screw pump body includes a first oil chamber, a second oil chamber, and a transmission chamber in sequence, and the anti-sludge component is located in the first oil chamber and the second oil chamber; the control unit is electrically connected to the screw pump body and the anti-sludge component respectively.

2. The physical desorption anti-siltation screw oil production system according to claim 1, characterized in that: The first oil chamber contains a rotor and a stator. The stator is embedded in the first oil chamber, and its inner wall has a helical cavity that matches the rotor's helix. The rotor is located inside the stator. The first oil chamber has a discharge port at the end furthest from the second oil chamber, and the discharge port is connected to one end of the rotor through a tubular column.

3. The physical desorption anti-siltation screw oil production system according to claim 1, characterized in that: The second oil chamber is equipped with a rotating shaft with a feed inlet at its top; the transmission chamber is equipped with a transmission shaft, with the rotor and transmission shaft connected to both ends of the rotating shaft respectively; a motor is located at the end of the transmission chamber away from the second oil chamber, and the output end of the motor is connected to the transmission shaft.

4. The physical desorption anti-siltation screw oil production system according to claim 1, characterized in that: The anti-sludge component includes a sensor, an ultrasonic transducer, and an electromagnetic coil. The sensor is evenly distributed on the outer wall of the rotor, the feed inlet, and the discharge outlet; the ultrasonic transducer is located on the outer wall of the rotor, and the electromagnetic coil is located on the inner wall of the stator.

5. The physical desorption anti-siltation screw oil production system according to claim 1, characterized in that: The control unit includes a data processing module and a control module.

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