A screw pump well electric heating current collector converter

Abstract

The application discloses a kind of screw pump well electric heating current collection converter, including upper rotary converter and spring leg structure located below rotary converter;Rotary converter inside integrated carbon brush slip ring, carbon brush slip ring is connected with the cable of current collector by slip ring terminal post to realize the column rotation of screw pump and is connected to power supply;Spring leg structure is integrated with spring and spring rod to prevent upper rotary converter from shaking.The current collection converter of the application is used to solve the problems of difficult wellbore lifting, complex ground driving equipment and other problems in screw pump well, by installing a set of current collection converter on the upper part of screw pump driving head, cooperating with hollow sucker rod for downhole electric heating, to improve the temperature of crude oil in wellbore, reduce the viscosity of crude oil, so as to ensure normal and stable production of screw pump well.

Description

Technical Field

[0001] This invention relates to the field of petrochemical technology, and in particular to a screw pump well electric heating current collector converter. Background Technology

[0002] High-viscosity and high-pour-point-rate oil wells experience significant wellbore lifting resistance, making it difficult to maintain normal production using conventional screw pumps. Installing a current collector converter on the screw pump drive head, in conjunction with a hollow sucker rod, for wellbore electric heating can effectively increase the temperature of the crude oil inside the wellbore, reduce its viscosity, improve its flowability, and ensure stable well production. Currently, screw pump well electric heating technology is rarely used both domestically and internationally.

[0003] Since screw pumps lift crude oil by rotation, the technical bottleneck lies in how to connect the rotating rod to a power supply for heating.

[0004] Therefore, based on the above-mentioned technical problems, those skilled in the art urgently need to develop a screw pump well electric heating current collector converter. Summary of the Invention

[0005] The purpose of this invention is to provide an electric heating current collector converter for screw pump wells. This current collector converter is used to solve the problems of difficult wellbore lifting and complex surface drive equipment in screw pump wells. By installing a current collector converter on the upper part of the screw pump drive head, and cooperating with the hollow sucker rod to perform downhole electric heating, the temperature of crude oil in the wellbore is increased and the viscosity of crude oil is reduced, thereby ensuring the normal and stable production of screw pump wells.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The present invention provides an electric current collector converter for a screw pump well, the current collector converter being integrated into the upper part of the screw pump drive head, and the current collector converter comprising:

[0008] The upper rotary converter and the spring leg structure located below the rotary converter;

[0009] The rotary converter integrates a carbon brush slip ring, which is electrically connected to the current collector via a slip ring terminal to provide power to the rotating rod of the screw pump.

[0010] The spring leg structure integrates a spring and a spring rod to prevent the current collector from wobbling.

[0011] Furthermore, the spring leg structure includes:

[0012] The spring leg base plate has a through hole for a smooth rod at its center, and multiple mounting holes are provided along its circumference for assembly and fixation with an external structure by bolts.

[0013] Multiple spring rods fixed to the base plate of the spring leg and evenly distributed along the outer periphery of the through hole of the smooth rod; and

[0014] A spring connected to the upper end of the spring rod;

[0015] The lower end of the rotary converter is connected to the spring rod via the spring.

[0016] Furthermore, the spring leg base plate is provided with three spring rods.

[0017] Furthermore, the rotary converter includes:

[0018] The converter outer cylinder has a converter base plate at its lower end, and the spring is connected to the lower surface of the converter base plate.

[0019] A carbon brush integrated structure is integrated inside the outer cylinder of the converter and connected to the bottom plate of the converter. The carbon brush slip ring is integrated inside the outer cylinder of the converter through the carbon brush integrated structure.

[0020] The upper end of the carbon brush slip ring is a cable sealing box, and the carbon brush slip ring is electrically connected to the cable inside the cable sealing box through the slip ring terminal;

[0021] The rotary converter is equipped with a current collector top cover at its upper end.

[0022] Furthermore, the carbon brush slip ring includes a carbon brush and a slip ring sleeved on the outside of the carbon brush;

[0023] The integrated carbon brush structure includes:

[0024] A carbon brush holder fixedly connected to the converter base plate; and

[0025] A carbon brush holder is fixedly connected to the carbon brush base, and the carbon brush holder is connected to the slip ring.

[0026] Furthermore, a monitoring window is located in the middle of one side of the outer cylinder of the converter.

[0027] Furthermore, a sealing structure is provided between the current collector top cover and the converter outer cylinder.

[0028] Furthermore, the converter base plate has a through hole at its center, and the through hole is coaxial with the through hole of the optical rod;

[0029] The hollow light rod passes through the light rod through hole and the through hole in sequence, and the end of the hollow light rod near the bottom plate of the converter is fixed by a clip.

[0030] In the above technical solution, the screw pump well electric heating current collector converter provided by the present invention has the following beneficial effects:

[0031] The current collector converter of the present invention is used to solve the problems of difficult wellbore lifting and complex surface drive equipment in screw pump wells. By installing a current collector converter on the upper part of the screw pump drive head, and cooperating with the hollow sucker rod for downhole electric heating, the temperature of crude oil in the wellbore is increased and the viscosity of crude oil is reduced, thereby ensuring the normal and stable production of screw pump wells.

[0032] The current collector converter of the present invention has a simple structure, consisting of an upper rotary converter and a lower spring leg structure, which is readily available and easy to install; and the spring leg structure prevents the current collector from shaking due to the rotation of the rod column, ensuring the smooth operation of the screw pump drive head and normal oil well production, while reducing maintenance costs.

[0033] The carbon brush slip ring of this invention is made of a high-temperature resistant and wear-resistant material, ensuring reliable quality.

[0034] The current collector converter of the present invention is suitable for screw pump wells with high pour point and high viscosity, including vertical wells with different production tubing sizes, and is especially suitable for heavy oil and high pour point oil reservoirs, with broad application prospects. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0036] Figure 1 This is a schematic diagram of the structure of a screw pump well electric heating current collector converter disclosed in an embodiment of this application;

[0037] Figure 2 This is a schematic diagram of the structure of a rotary converter for an electric heating current collector in a screw pump well, as disclosed in an embodiment of this application.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Spring-loaded leg structure; 2. Rotary converter;

[0040] 101. Spring leg base plate; 102. Through hole for smooth rod; 103. Mounting hole; 104. Spring rod; 105. Spring;

[0041] 201. Converter housing; 202. Monitoring window; 203. Converter base plate; 204. Carbon brush base; 205. Carbon brush bracket; 206. Carbon brush slip ring; 207. Slip ring terminal; 208. Cable sealing box; 209. Current collector top cover; 210. Sealing structure;

[0042] 301. Hollow rod; 302. Clip. Detailed Implementation

[0043] To enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0044] See Figures 1 to 2 As shown;

[0045] This embodiment discloses a current collector converter for electric heating in a screw pump well. The current collector converter is integrated into the upper part of the screw pump drive head, and the current collector converter includes:

[0046] The upper rotary converter 2 and the spring leg structure 1 located below the rotary converter 2;

[0047] The rotary converter 2 integrates a carbon brush slip ring 206, which is electrically connected to the current collector via a slip ring terminal 207 to enable the screw pump rod to rotate and be powered.

[0048] The spring leg structure 1 integrates a spring 105 and a spring rod 104 to prevent the current collector from wobbling.

[0049] Specifically, this embodiment discloses an electric heating current collector converter suitable for high-viscosity and high-pour-point oil wells. It includes an upper rotary converter 2 and a lower spring leg structure 1. The connection to the current collector is mainly achieved through a carbon brush slip ring 206 within the upper rotary converter 2, ensuring the rotational connection of the rod string to meet the electric heating requirements of the screw pump well. Simultaneously, to prevent current collector swaying caused by rod string rotation, this embodiment incorporates the lower spring leg structure 1, using a spring 105 and a spring rod 104 as a damping structure. The elasticity of the spring 105 absorbs stress, thereby preventing current collector swaying.

[0050] Before implementing electric heating in an oil well, the wellbore temperature distribution after changes in water cut and production rate are predicted based on the well's current production status. Based on these temperature distribution changes, the corresponding downhole heating power at the wellhead temperature is predicted to ensure that electric heating can reach the expected wellhead crude oil temperature after subsequent changes in production rate and water cut. In this embodiment, the current collector converter uses high-temperature resistant, wear-resistant carbon brushes and slip rings with high rated current to ensure easy replacement of internal spare parts in the future. During the screw pump electric heating production process in this embodiment, the operation and wear of the internal carbon brushes and slip rings of the current collector are regularly inspected and maintained to ensure stable operation of the screw pump electric heating and normal oil well production.

[0051] Preferably, the spring leg structure 1 in this embodiment includes:

[0052] The spring leg base plate 101 has a through hole 102 for a smooth rod at its center, and multiple mounting holes 103 are provided along its circumference for assembly and fixation with the external structure by bolts.

[0053] Multiple spring rods 104, fixedly connected to the spring leg base plate 101 and evenly distributed along the outer periphery of the through hole 102 of the smooth rod; and

[0054] Spring 105 is connected to the upper end of spring rod 104;

[0055] The lower end of the rotary converter 2 is connected to the spring rod 104 via a spring 105.

[0056] More preferably, the spring leg base plate 101 of this embodiment is provided with three spring rods 104.

[0057] Preferably, the rotary converter 2 in this embodiment includes:

[0058] The converter outer cylinder 201 has a converter base plate 203 at its lower end, and a spring 105 is connected to the lower surface of the converter base plate 203.

[0059] A carbon brush integrated structure is integrated inside the converter outer cylinder 201 and connected to the converter base plate 203. The carbon brush slip ring 206 is integrated inside the converter outer cylinder 201 through the carbon brush integrated structure.

[0060] The upper end of the carbon brush slip ring 206 is the cable sealing box 208. The carbon brush slip ring 206 is electrically connected to the cable inside the cable sealing box 208 through the slip ring terminal 207.

[0061] A collector top cover 209 is provided on the upper end of the rotary converter 2.

[0062] In this embodiment, the carbon brush slip ring 206 includes a carbon brush and a slip ring sleeved on the outside of the carbon brush.

[0063] The carbon brush integrated structure includes:

[0064] The carbon brush holder 204 is fixedly connected to the converter base plate 203; and

[0065] A carbon brush holder 205 is fixedly connected to the carbon brush base 204, and the carbon brush holder 205 is connected to a slip ring.

[0066] To facilitate monitoring of the operation of internal components, a monitoring window 202 is provided at the middle position of one side of the converter outer cylinder 201 in this embodiment.

[0067] Preferably, in this embodiment, a sealing structure 210 is provided between the current collector top cover 209 and the converter outer cylinder 201.

[0068] Different screw pump drive heads are used in actual oil well production to adapt to different rod rotation requirements. At the same time, the outer diameter of the current collector used in different drive heads is also different. Among them, the outer diameter of the Netzch drive head is slightly larger, about 0.5mm-0.8mm, while the Kudu drive head and some domestic drive heads are slightly smaller, about 0.3mm-0.5mm.

[0069] Preferably, in this embodiment, the converter base plate 203 has a through hole at its center, and the through hole is coaxial with the optical rod through hole 102; wherein, the hollow optical rod 301 passes through the optical rod through hole 102 and the through hole in sequence, and the end of the hollow optical rod 301 near the converter base plate 203 is fixed by a clip 302.

[0070] In the above technical solution, the screw pump well electric heating current collector converter provided by the present invention has the following beneficial effects:

[0071] The current collector converter of the present invention is used to solve the problems of difficult wellbore lifting and complex surface drive equipment in screw pump wells. By installing a current collector converter on the upper part of the screw pump drive head, and cooperating with the hollow sucker rod for downhole electric heating, the temperature of crude oil in the wellbore is increased and the viscosity of crude oil is reduced, thereby ensuring the normal and stable production of screw pump wells.

[0072] The current collector converter of the present invention has a simple structure, consisting of an upper rotary converter 2 and a lower spring leg structure 1, which is readily available and easy to install; and the spring leg structure 1 prevents the current collector from shaking due to the rotation of the rod column, ensuring the smooth operation of the screw pump drive head and normal oil well production, while reducing maintenance costs.

[0073] The carbon brush slip ring 206 of this invention is made of a high-temperature resistant and wear-resistant material, ensuring reliable quality.

[0074] The current collector converter of the present invention is suitable for screw pump wells with high pour point and high viscosity, including vertical wells with different production tubing sizes, and is especially suitable for heavy oil and high pour point oil reservoirs, with broad application prospects.

[0075] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A screw pump well electric heating current collector converter, characterized in that, The current collector converter is integrated into the upper part of the screw pump drive head, and the current collector converter includes: The upper rotary converter (2) and the spring leg structure (1) located below the rotary converter (2); The rotary converter (2) integrates a carbon brush slip ring (206), which is electrically connected to the current collector cable through the slip ring terminal (207) to realize the screw pump rod rotation connection power supply. The spring leg structure (1) integrates a spring (105) and a spring rod (104) to prevent the current collector from shaking.

2. The screw pump well electric heating current collector converter according to claim 1, characterized in that, The spring leg structure (1) includes: Spring leg base plate (101), the spring leg base plate (101) has a light rod through hole (102) in the center, and the spring leg base plate (101) has a plurality of mounting holes (103) along its circumference, so as to be assembled and fixed with the external structure by bolts; Multiple spring rods (104) fixedly connected to the spring leg base plate (101) and evenly distributed along the outer periphery of the through hole (102) of the smooth rod; and A spring (105) is connected to the upper end of the spring rod (104); The lower end of the rotary converter (2) is connected to the spring rod (104) via the spring (105).

3. The screw pump well electric heating current collector converter according to claim 2, characterized in that, Three spring rods (104) are provided on the spring leg base plate (101).

4. The screw pump well electric heating current collector converter according to claim 2, characterized in that, The rotary converter (2) includes: The converter outer cylinder (201) has a converter base plate (203) at its lower end, and the spring (105) is connected to the lower surface of the converter base plate (203). A carbon brush integrated structure is integrated inside the converter outer cylinder (201) and connected to the converter base plate (203), wherein the carbon brush slip ring (206) is integrated inside the converter outer cylinder (201) through the carbon brush integrated structure; The upper end of the carbon brush slip ring (206) is a cable sealing box (208), and the carbon brush slip ring (206) is electrically connected to the cable inside the cable sealing box (208) through the slip ring terminal (207); The rotary converter (2) is provided with a collector top cover (209) at its upper end.

5. The screw pump well electric heating current collector converter according to claim 4, characterized in that, The carbon brush slip ring (206) includes a carbon brush and a slip ring sleeved on the outside of the carbon brush; The integrated carbon brush structure includes: A carbon brush holder (204) fixedly connected to the converter base plate (203); and A carbon brush holder (205) is fixedly connected to the carbon brush base (204), and the carbon brush holder (205) is connected to the slip ring.

6. The screw pump well electric heating current collector converter according to claim 4, characterized in that, The converter outer cylinder (201) has a monitoring window (202) located in the middle of one side.

7. The screw pump well electric heating current collector converter according to claim 4, characterized in that, A sealing structure (210) is provided between the current collector top cover (209) and the converter outer cylinder (201).

8. The screw pump well electric heating current collector converter according to any one of claims 4 to 7, characterized in that, The converter base plate (203) has a through hole at its center, and the through hole is coaxial with the optical rod through hole (102); The hollow light rod (301) passes through the light rod through hole (102) and the through hole in sequence, and the hollow light rod (301) is fixed by a clip (302) at the end near the converter base plate (203).

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