Anti-airlock, anti-snap, wear-resistant and anti-corrosion pump with anti-magnetic valve

Abstract

The utility model relates to an anti-airlock anti-snap wear-resistant corrosion-resistant pump with an anti-magnetic valve, which belongs to the technical field of oil extraction equipment for oil fields and comprises a pump cylinder, a plunger is arranged in the pump cylinder, the upper end of the plunger is connected with a central pipe, the end of the central pipe is provided with an upper oil outlet connector, and the upper end of the pump cylinder is connected with a first pump cylinder coupling. The oil well pump is used in oil wells containing sand, gas and corrosive media, and can prevent corrosion, abrasion and airlock so as to prolong the service life and improve the pump efficiency.

Description

Technical Field

[0001] The utility model relates to an anti-gas lock, anti-pull-off, wear-resistant and anti-corrosion pump with an anti-magnetic valve, belonging to the technical field of oil production equipment for oil fields. Background Art

[0002] Wear-resistant and anti-corrosion pumps are designed for special oil well fluids containing corrosive media. Corrosive media such as H2S, CO2, and O2 in the oil well fluid corrode and wear the vulnerable parts of the oil well pump, causing them to break and fail. In addition, oil well fluids containing gaseous corrosive media such as H2S, CO2, and O2 are often accompanied by gas locks and gas shocks during the extraction process, causing destructive failure of the main parts of the oil well pump. The metal valve ball and metal valve seat of the oil inlet valve are prone to generate magnetic force after continuous opening and closing collisions, and the valve ball and valve seat are adsorbed, resulting in delayed opening and closing of the oil inlet valve, which increases the possibility of gas lock. Traditional oil well pumps have poor anti-gas lock and anti-corrosion effects, which greatly reduces the service life of the oil well pump, reducing both pump efficiency and production.

[0003] At the same time, ordinary oil well pump inlet valves usually use 9Cr18Mo steel balls or carbide balls with metal valve seats. During use, the valve ball constantly hits the valve seat, making the valve ball and valve seat magnetic and adsorbent, and the valve ball is blocked from opening. In gas-containing oil wells, it is easy to cause gas lock, reduce production or even stop production; the metal valve ball is easily corroded in the oil well fluid containing corrosive media, which reduces the sealing performance and reduces the pump efficiency.

[0004] In addition, conventional oil outlet joints are not strong enough and are easily broken. The oil outlet joints on conventional oil pumps move up and down in the pump barrel following the plunger. The size of the pump barrel limits the structural size of the oil outlet joint, resulting in insufficient structural strength of the oil outlet joint, which is prone to breakage and failure. The up and down impact of the floating valve ball further exacerbates the risk of breakage. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide an anti-gas lock, anti-break, wear-resistant and corrosion-resistant pump with an anti-magnetic valve in view of the above shortcomings. The pump can be used in oil wells containing sand, gas and corrosive media to prevent corrosion, wear and gas lock to extend the service life and improve the pump efficiency.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is as follows: an anti-air lock, anti-pull-off, wear-resistant and corrosion-resistant pump with an anti-magnetic valve, comprising a pump barrel, a plunger is provided inside the pump barrel, the upper end of the plunger is connected to a center pipe, the end of the center pipe is provided with an upper oil outlet joint, the upper end of the pump barrel is connected to a first pump barrel coupling, the first pump barrel coupling is connected to an oil pipe, and the upper oil outlet joint is arranged in the oil pipe.

[0007] As a further improvement of the above technical solution:

[0008] A traveling valve assembly is arranged below the lower end of the plunger. The traveling valve assembly comprises a traveling valve cover. A traveling valve seat is arranged below the traveling valve cover.

[0009] A floating valve ball is arranged on the floating valve seat, and a compression joint is arranged below the floating valve seat.

[0010] The lower end of the pump barrel is connected with a second pump barrel coupling, and the second pump barrel coupling is connected with a fixed valve assembly.

[0011] The fixed valve assembly comprises a fixed valve cover, the upper end of which is fixedly connected to the second pump barrel coupling, and a fixed valve ball is arranged in the fixed valve cover.

[0012] A fixed valve seat is arranged below the fixed valve ball, and a fixed valve joint is arranged below the fixed valve seat.

[0013] The fixed valve ball comprises a hard tungsten alloy spherical inner core and a zirconium oxide ceramic outer layer.

[0014] The hard tungsten alloy spherical inner core has a density of 14 g / cm3 and a volume that accounts for 55% of the entire fixed valve ball.

[0015] The pump barrel comprises a steel base pipe, and a permeation layer is permeated on the inner wall of the steel base pipe.

[0016] The infiltrated layer is a carbon-nitrogen-boron ternary infiltrated hardened layer.

[0017] The utility model adopts the above technical solution and has the following advantages:

[0018] The fixed valve used in the utility model is an anti-magnetic valve, which includes a valve ball and a hard tungsten alloy valve seat. The valve ball is composed of a hard tungsten alloy spherical core and a zirconia ceramic outer layer. The zirconia ceramic outer layer has the characteristics of non-magnetic, electrical insulation and never rusting, which effectively prevents the metal valve ball from continuously hitting the metal valve seat, resulting in magnetic adsorption between the valve ball and the valve seat, causing the valve ball to be blocked from opening, and effectively prevents the occurrence of gas lock under gas-containing working conditions. The unique structure of the valve ball effectively solves the problems of low density, difficulty in falling back, and leakage due to poor sealing of pure ceramic valve balls. The characteristic of zirconia ceramics never rusting greatly improves the anti-corrosion performance of the anti-magnetic valve.

[0019] The utility model designs the oil outlet joint outside the pump barrel and inside the oil pipe, so that the size of the oil outlet joint is free from the limitation of the inner hole size of the pump barrel, the physical size is increased, the strength is greatly improved, there is no up and down impact of the valve ball, it is corrosion-resistant and tear-resistant, and the service life of the whole pump is greatly improved.

[0020] The utility model uses a wear-resistant and corrosion-resistant pump barrel. The inner wall of the pump barrel is infiltrated with a permeation layer that increases wear resistance and corrosion resistance. The permeation layer is a two-phase (FeB+Fe2B) boride structure with high thermal stability. FeB+Fe2B will not oxidize when heated to 800°C in air. It has high hardness, FeB microhardness 1800-2200HV, Fe2B microhardness 1200-1800HV, high wear resistance and good corrosion resistance. The permeation layer is stable in sulfuric acid, hydrochloric acid, phosphoric acid and various alkali and salt water solutions. Therefore, the service life of the whole pump is greatly improved, the pump inspection cycle is extended, the oil production is increased, the consumption of manpower and material resources is reduced, and the production cost is reduced.

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of an anti-gas lock, anti-breakage, wear-resistant and anti-corrosion pump with an anti-magnetic valve in an embodiment of the utility model;

[0023] Figure 2 It is a structural schematic diagram of a fixed valve ball in an embodiment of the utility model.

[0024] In the figure,

[0025] 1-oil pipe, 2-upper oil outlet joint, 3-center pipe, 4-first pump barrel coupling, 5-pump barrel, 6-plunger, 7-swimming valve cover, 8-swimming valve ball, 9-swimming valve seat, 10-compression joint, 11-second pump barrel coupling, 12-fixed valve cover, 13-fixed valve ball, 131-zirconia ceramic outer layer, 132-hard tungsten alloy spherical inner core, 14-fixed valve seat, 15-fixed valve joint. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined. Example

[0029] like Figure 1-2 As shown, an anti-air lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve includes a pump barrel 5, a plunger 6 is provided inside the pump barrel 5, the upper end of the plunger 6 is connected to a center pipe 3, the end of the center pipe 3 is provided with an upper oil outlet joint 2, the upper end of the pump barrel 5 is connected to a first pump barrel coupling 4, the first pump barrel coupling 4 is connected to an oil pipe 1, and the upper oil outlet joint 2 is arranged in the oil pipe 1. The upper oil outlet joint 2 is designed into the oil pipe 1, and the size of the oil outlet joint 2 can be increased. The upper oil outlet joint 2 is large in size and high in strength. Taking the 150 pump diameter specification as an example, the diameter of the upper oil outlet joint 2 can be increased from 37.3 mm of the conventional oil outlet joint to 58 mm, which can be as close to the inner diameter size of the pump connected to the oil pipe as possible. The same is true for other specifications of oil pumps.

[0030] A floating valve assembly is provided below the lower end of the plunger 6, and the floating valve assembly includes a floating valve cover 7, a floating valve seat 9 is provided below the floating valve cover 7, a floating valve ball 8 is provided on the floating valve seat 9, and a clamping joint 10 is provided below the floating valve seat 9. One or more floating valve assemblies can be connected in series as needed. The lower end of the pump barrel 5 is connected to a second pump barrel coupling 11, and the second pump barrel coupling 11 is connected to a fixed valve assembly. The fixed valve assembly includes a fixed valve cover 12, and the upper end of the fixed valve cover 12 is fixedly connected to the second pump barrel coupling 11. A fixed valve ball 13 is provided in the fixed valve cover 12, a fixed valve seat 14 is provided below the fixed valve ball 13, and a fixed valve joint 15 is provided below the fixed valve seat 14.

[0031] The fixed valve ball 13 includes a hard tungsten alloy spherical core 132 and a zirconia ceramic outer layer 131. The zirconia ceramic outer layer is non-magnetic, electrically insulating and never rusts, which effectively prevents the metal valve ball from continuously hitting the metal valve seat, causing the valve ball and the valve seat to produce magnetic adsorption, resulting in the valve ball opening being blocked. It is more effective in preventing gas lock under gas-containing working conditions. The density of the hard tungsten alloy spherical core 132 is 14g / cm 3 The volume accounts for 55% of the entire fixed valve ball 13, and the overall density of the fixed valve ball 13 is 10.4g / cm 3 The density is greater than that of the ordinary valve ball 9Cr18Mo. This structure effectively solves the problem of pure ceramic valve balls having low density and difficulty in falling back, and leaking due to poor sealing. The rust-free property of zirconia ceramics greatly improves the anti-magnetic and anti-corrosion performance of the fixed valve ball 13.

[0032] A central tube is arranged on the upper part of the plunger 6, which is connected to the upper oil outlet joint 2 outside the pump barrel 5 and inside the oil pipe 1. This structure frees the upper oil outlet joint 2 from the size limitation of the pump barrel 5, and there is no up and down impact of the valve ball, so the strength can be greatly improved and the service life of the whole pump can be greatly extended.

[0033] The pump barrel 5 includes a steel base pipe, and the inner wall of the steel base pipe is infiltrated with a permeation layer for increasing the wear resistance and corrosion resistance of the pump barrel. The permeation layer is a carbon-nitrogen-boron ternary co-permeation hardening layer, which is more dense and has a dual-phase (FeB+Fe2B) boride structure with high thermal stability. FeB+Fe2B will not oxidize when heated to 800°C in air; the permeation layer has high hardness, hardness ≥Hv1400, FeB microhardness 1800~2200HV, Fe2B microhardness 1200~1800HV, high wear resistance and good corrosion resistance, and the permeation layer is stable in sulfuric acid, hydrochloric acid, phosphoric acid and various alkali and brine solutions. It can be used in oil wells containing sand and corrosive media to prevent corrosion, wear and gas lock to improve pump efficiency. Therefore, the service life of the entire pump is greatly improved, the pump inspection cycle is extended, the oil production is increased, the consumption of manpower and material resources is reduced, and the production cost is reduced.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve, characterized by: The invention comprises a pump barrel (5), wherein a plunger (6) is provided inside the pump barrel (5), the upper end of the plunger (6) is connected to a center pipe (3), the end of the center pipe (3) is provided with an upper oil outlet joint (2), the upper end of the pump barrel (5) is connected to a first pump barrel coupling (4), the first pump barrel coupling (4) is connected to an oil pipe (1), and the upper oil outlet joint (2) is arranged inside the oil pipe (1).

2. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 1, characterized in that: A traveling valve assembly is provided below the lower end of the plunger (6), the traveling valve assembly comprising a traveling valve cover (7), and a traveling valve seat (9) is provided below the traveling valve cover (7).

3. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 2, characterized in that: A traveling valve ball (8) is provided on the traveling valve seat (9), and a clamping joint (10) is provided below the traveling valve seat (9).

4. The anti-gas lock, anti-breakage, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 3, characterized in that: The lower end of the pump barrel (5) is connected to a second pump barrel coupling (11), and the second pump barrel coupling (11) is connected to a fixed valve assembly.

5. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 4, characterized in that: The fixed valve assembly comprises a fixed valve cover (12), the upper end of the fixed valve cover (12) is fixedly connected to the second pump barrel coupling (11), and a fixed valve ball (13) is arranged in the fixed valve cover (12).

6. The anti-gas lock, anti-breakage, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 5, characterized in that: A fixed valve seat (14) is provided below the fixed valve ball (13), and a fixed valve connector (15) is provided below the fixed valve seat (14).

7. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 6, characterized in that: The fixed valve ball (13) comprises a hard tungsten alloy spherical inner core (132) and a zirconium oxide ceramic outer layer (131).

8. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 7, characterized in that: The density of the hard tungsten alloy spherical core (132) is 14 g / cm 3 , the volume accounts for 55% of the entire fixed valve ball (13).

9. The anti-gas lock, anti-breakage, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 8, characterized in that: The pump barrel (5) comprises a steel base pipe, and a permeation layer is permeated on the inner wall of the steel base pipe.

10. The anti-gas lock, anti-break, wear-resistant and anti-corrosion pump with an anti-magnetic valve according to claim 9, characterized in that: The infiltrated layer is a carbon-nitrogen-boron ternary infiltrated hardened layer.

Images