Oil-gas-sand separation device for linear motor
The oil-gas-sand separation device addresses the challenges of submersible pumps by implementing a filtration and multi-layer sand removal system, enhancing pump durability and efficiency through preliminary separation of impurities, thus extending lifespan and reducing maintenance needs.
Patent Information
- Application Number
- CN202420679269.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-03
- Publication Date
- 2024-12-10
- Estimated Expiration
- 2034-04-03
AI Technical Summary
Submersible oil pumps in rodless oil production face issues such as limited adaptability, difficult parameter adjustment, high cost, short lifespan due to harsh working environments, and frequent maintenance needs, primarily caused by mud, sand, and gas accumulation leading to wear and corrosion.
An oil-gas-sand separation device comprising a gas-liquid separation device with a filter screen and baffles, and a multi-layer sand removal system with wear-resistant sleeves and scraping cylinders to separate and remove impurities before they enter the pump, prolonging its life and improving crude oil quality.
The device effectively separates mud, sand, and gas from crude oil, extending the submersible pump's lifespan, reducing maintenance costs, saving resources, and enhancing work efficiency while maintaining oil quality.
Smart Images
Figure CN222131234U_ABST
Abstract
Description
Technical field:
[0001] The utility model relates to the technical field of petroleum production operations, in particular to an oil-gas-sand separation device for a linear motor. Background technology:
[0002] At present, submersible pumps are used in oil production operations as a rodless oil production method. That is, the energy is not transmitted by sucker rods, but by cables or high-pressure liquids. Although this equipment has completely gotten rid of the weak link of sucker rods, it still has problems such as limited adaptability, difficult parameter adjustment, high price and short life.
[0003] Submersible oil pumps can solve the problem of work efficiency, but their lifespan is relatively short, mainly because the working environment is harsh. The mud, sand, and bubbles mixed in the oil cause great wear and corrosion to the plunger. Long-term operation will cause mud and sand accumulation or even jamming. Maintenance consumes a lot of manpower and material resources, and the quality of crude oil will also decline. Utility model content:
[0004] The technical problem to be solved by the utility model is to provide an oil-gas-sand separation device for a linear motor, which realizes the preliminary separation of mud, sand and gas in crude oil, reduces the entry of mud and air bubbles into the submersible pump, prolongs the life of the submersible pump, improves the quality of crude oil, saves manpower and material resources, saves maintenance costs, saves electricity, and improves work efficiency.
[0005] The technical scheme adopted by the utility model is: an oil-gas-sand separation device for a linear motor, comprising a gas-liquid separation device and a sand removal device, wherein the gas-liquid separation device comprises a liquid inlet cylinder sleeved on the outside of a submersible pump barrel, liquid inlet holes are evenly distributed on the upper side wall of the liquid inlet cylinder, a filter screen is arranged on the inner wall of the liquid inlet cylinder, a partition is arranged between the liquid inlet cylinder and the submersible pump barrel, the bottom end of the partition is connected to the inner wall of the bottom end of the liquid inlet cylinder, baffles are alternately arranged on the inner wall of the partition and the outer wall of the submersible pump barrel, and a liquid inlet groove is opened on the submersible pump barrel at the lower end of the baffle;
[0006] The sand removal device includes a screen tube coupling and multi-layer sand removal cups. The screen tube coupling is connected to the lower end of the pump barrel of the submersible oil pump. A sand discharge hole is opened on the side wall of the screen tube coupling. The multi-layer sand removal cups are installed in the screen tube coupling. The sand removal cup includes a cylindrical base and a scraping cylinder designed on the upper end of the cylindrical base. The scraping cylinder is inwardly contracted from bottom to top. A sand passing hole is opened on the cylindrical base. An axial slit is opened on the upper part of the scraping cylinder. The cylindrical base of the upper sand removal cup is sleeved on the outer side of the scraping cylinder of the lower sand removal cup and sits on the outer end surface of the cylindrical base of the lower sand removal cup. The sand passing hole of the cylindrical base of the upper sand removal cup is connected with the axial slit of the scraping cylinder of the lower sand removal cup. The upper end of the scraping cylinder of each layer of the sand removal cup is against the outer wall of the submersible oil pump plunger polished rod.
[0007] Furthermore, two gas-liquid separation devices are provided, and the two gas-liquid separation devices are sequentially arranged outside the pump barrel of the submersible pump.
[0008] Furthermore, the multi-layer sand removal cup has three layers.
[0009] Furthermore, the inner side of the cylindrical base of the bottommost sand removal cup of the multi-layer sand removal cup is connected to a wear-resistant sleeve, and the wear-resistant sleeve is sleeved on the outer wall of the polished rod of the submersible pump plunger.
[0010] Furthermore, the wear-resistant sleeve is made of hard alloy.
[0011] Furthermore, the upper end of the cylindrical base of the bottommost desander cup of the multi-layer desander cup is limited by the inner wall step of the screen tube coupling, the lower end of the screen tube coupling is connected to the connecting pipe, and the lower end of the cylindrical base of the bottommost desander cup of the multi-layer desander cup is limited by the upper end surface of the connecting pipe.
[0012] Furthermore, the sand removal cup is made of 304 stainless steel.
[0013] Furthermore, two adjacent layers of the multi-layer sand removal cups are connected by spot welding.
[0014] The beneficial effects of the utility model are as follows: the utility model realizes the preliminary separation of mud and gas in crude oil, reduces the entry of mud and air bubbles into the submersible pump, prolongs the life of the submersible pump, improves the quality of crude oil, can save manpower and material resources, save maintenance costs, save electricity, and improve work efficiency. Description of the drawings:
[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0016] Figure 1 It is a structural schematic diagram of the utility model.
[0017] Figure 2 It is a structural schematic diagram of the gas-liquid separation device.
[0018] Figure 3 It is a structural schematic diagram of the sand removal device.
[0019] Figure 4 It is a schematic diagram of the structure of the three-layer sand removal cup. Specific implementation method:
[0020] like Figure 1 , Figure 2As shown, an oil-gas-sand separation device for a linear motor comprises a gas-liquid separation device 1 and a sand removal device 2, wherein the gas-liquid separation device 1 comprises a liquid inlet cylinder 17 mounted on the outside of a submersible pump barrel 16, liquid inlet holes 4 are evenly distributed on the upper side wall of the liquid inlet cylinder 17, a filter screen 3 is arranged on the inner wall of the liquid inlet cylinder 17, a partition 5 is arranged between the liquid inlet cylinder 17 and the submersible pump barrel 16, the bottom end of the partition 5 is connected to the inner wall of the bottom end of the liquid inlet cylinder 17, there is a gap between the top of the partition 5 and the top of the inside of the liquid inlet cylinder 17, baffles 6 are alternately arranged on the inner wall of the partition 5 and the outer wall of the submersible pump barrel 16, and a liquid inlet groove 7 is opened on the submersible pump barrel 16 at the lower end of the baffle 6; two gas-liquid separation devices 1 are arranged, and the two gas-liquid separation devices 1 are sequentially arranged on the outside of the submersible pump barrel 16.
[0021] like Figure 3 , Figure 4 As shown, the desanding device 2 includes a screen tube coupling 13 and three layers of desanding cups, the three layers of desanding cups are respectively desanding cup I8, desanding cup II9, and desanding cup III10, the screen tube coupling 13 is connected to the lower end of the submersible pump barrel 16, a sand discharge hole is opened on the side wall of the screen tube coupling 13, and three layers of desanding cups are installed in the screen tube coupling 13, the desanding cups include a cylindrical base and a scraping cylinder designed at the upper end of the cylindrical base, and the scraping cylinder is inward from bottom to top. It is in a contracted shape, with a sand-passing hole 15 on the cylindrical base, and an axial slit 14 on the upper part of the scraping tube. The cylindrical base of the upper sand removal cup is mounted on the outer side of the scraping tube of the lower sand removal cup and sits on the outer end surface of the cylindrical base of the lower sand removal cup. The sand-passing hole 15 of the cylindrical base of the upper sand removal cup is connected with the axial slit 14 of the scraping tube of the lower sand removal cup, and the upper end of the scraping tube of each layer of the sand removal cup rests on the outer wall of the submersible pump plunger polished rod 12.
[0022] The inner side of the cylindrical base of the sand removal cup III 10 is connected to a wear-resistant sleeve 11 , and the wear-resistant sleeve 11 is sleeved on the outer wall of the plunger polished rod 12 of the submersible oil pump.
[0023] The wear-resistant sleeve 11 is made of hard alloy and has good wear resistance.
[0024] The upper end of the cylindrical base of the sand removal cup III 10 is limited by the inner wall step of the screen tube coupling 13, the lower end of the screen tube coupling 13 is connected to the connecting pipe, and the lower end of the cylindrical base of the sand removal cup III 10 is limited by the upper end surface of the connecting pipe.
[0025] The sand removal cup is made of 304 stainless steel and has good corrosion resistance.
[0026] Two adjacent layers of the multi-layer sand removal cups are connected by spot welding.
[0027] When in use, crude oil enters the liquid inlet cylinder 17 through the liquid inlet hole 4 and the filter screen 3. The filter screen 3 effectively blocks large particles of mud and sand and larger bubbles from entering. The filtered oil enters the liquid inlet cylinder 17, bypasses the partition 5 upwards, passes through the gaps between the staggered baffles 6, and enters the pump from the liquid inlet groove 7. Due to the different specific gravities of gas and liquid, most of the gas will remain in the upper part of the liquid inlet cylinder 17 when bypassing the partition 5, and continue to disturb the oil when passing through the gaps of the baffle 6, further separating the gas.
[0028] The upper ends of the scraping tubes of the three-layer sand removing cups are all against the outer wall of the submersible pump plunger polished rod 12, and the attached gravel is effectively scraped off when the submersible pump plunger polished rod 12 moves up and down. The gravel between the sand removing cups I8 and II9 is slowly discharged from the axial slit 14 of the sand removing cup I8 and discharged to the outside of the pump through the sand discharge hole of the screen tube coupling 13. The gravel between the sand removing cups II9 and III10 is slowly discharged from the axial slit 14 of the sand removing cup II9, and then enters the sand discharge hole of the screen tube coupling 13 through the sand passing hole 15 of the sand removing cup I8 and is discharged to the outside of the pump. The gravel on the inner side of the sand removing cup III10 enters the sand discharge hole of the screen tube coupling 13 through the axial slit 14 of the sand removing cup III10, the sand passing hole 15 of the sand removing cup II9, and the axial slit 14 of the sand removing cup I8 and is discharged to the outside of the pump. The upper, middle and lower three-layer sand removing cups ensure the scraping rate of the gravel, reduce the wear of the polished rod, and increase the service life of the submersible pump.
[0029] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Ordinary technicians in the field should understand that the utility model can still be modified or replaced by equivalents to achieve the same technical effect; as long as the use requirements are met, they are within the protection scope of the utility model.
Claims
1. An oil-gas-sand separation device for a linear motor, characterized in that: It comprises a gas-liquid separation device and a sand removal device, wherein the gas-liquid separation device comprises a liquid inlet cylinder sleeved on the outside of a submersible pump barrel, liquid inlet holes are evenly distributed on the upper side wall of the liquid inlet cylinder, a filter screen is arranged on the inner wall of the liquid inlet cylinder, a partition is arranged between the liquid inlet cylinder and the submersible pump barrel, the bottom end of the partition is connected to the inner wall of the bottom end of the liquid inlet cylinder, the top end of the partition is spaced from the top end of the liquid inlet cylinder, baffles are alternately arranged on the inner wall of the partition and the outer wall of the submersible pump barrel, and a liquid inlet groove is opened on the submersible pump barrel at the lower end of the baffle; The sand removal device includes a screen tube coupling and multi-layer sand removal cups. The screen tube coupling is connected to the lower end of the pump barrel of the submersible oil pump. A sand discharge hole is opened on the side wall of the screen tube coupling. The multi-layer sand removal cups are installed in the screen tube coupling. The sand removal cup includes a cylindrical base and a scraping cylinder designed on the upper end of the cylindrical base. The scraping cylinder is inwardly contracted from bottom to top. A sand passing hole is opened on the cylindrical base. An axial slit is opened on the upper part of the scraping cylinder. The cylindrical base of the upper sand removal cup is sleeved on the outer side of the scraping cylinder of the lower sand removal cup and sits on the outer end surface of the cylindrical base of the lower sand removal cup. The sand passing hole of the cylindrical base of the upper sand removal cup is connected with the axial slit of the scraping cylinder of the lower sand removal cup. The upper end of the scraping cylinder of each layer of the sand removal cup is against the outer wall of the submersible oil pump plunger polished rod.
2. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: There are two gas-liquid separation devices, which are arranged in sequence outside the pump barrel of the submersible pump.
3. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: The multi-layer sand removal cup has three layers.
4. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: The inner side of the cylindrical base of the bottommost sand removal cup of the multi-layer sand removal cup is connected with a wear-resistant sleeve, and the wear-resistant sleeve is sleeved on the outer wall of the plunger polished rod of the submersible oil pump.
5. The oil-gas-sand separation device for a linear motor according to claim 4, characterized in that: The wear-resistant sleeve is made of hard alloy.
6. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: The upper end of the cylindrical base of the bottommost desander cup of the multi-layer desander cup is limited by the inner wall step of the screen tube coupling, the lower end of the screen tube coupling is connected to the connecting pipe, and the lower end of the cylindrical base of the bottommost desander cup of the multi-layer desander cup is limited by the upper end surface of the connecting pipe.
7. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: The sand removal cup is made of 304 stainless steel.
8. The oil-gas-sand separation device for a linear motor according to claim 1, characterized in that: Two adjacent layers of the multi-layer sand removal cups are connected by spot welding.