A device for converting heavy oil into light oil

Abstract

A kind of thick oil mixed with thin oil flow channel conversion pumping unit, the middle part of shunt connector has radial slot, the side wall of shunt connector has vertical flow channel, the lower part of shunt pipe is connected with the upper inner part of shunt connector, the lower part of packer is connected with the upper outer part of shunt connector, the inner wall of packer and the outer wall of shunt pipe form outer annulus, the upper part of shunt pipe has sealing connector, communication connector is connected with the upper part of packer, communication connector has communication slot, there is sealing ring between the inner wall of communication connector and the outer wall of sealing connector, sealing point is above the communication slot, the upper part of sealing pump cylinder is connected with the lower inner part of shunt connector, sealing plunger penetrates into sealing pump cylinder, inner annulus is formed between sealing plunger and the inner wall of shunt pipe, sealing plunger and sealing pump cylinder form sealing pair, so that the inner annulus can only communicate with the radial slot, the lower part of sealing plunger is connected with the oil pumping plunger in oil pumping pump, the upper part of oil pumping pump cylinder is connected with the lower part of shunt connector.

Description

Technical Field

[0001] This utility model relates to an oil pumping device for oil fields, which is a device for extracting heavy oil, specifically a heavy oil-to-light oil flow channel conversion pumping device. Background Technology

[0002] Many problems exist in the process of pumping heavy oil from wells in oilfields using oil pumps. These include difficulties in the downward movement of the sucker rod due to high friction between the sucker rod and the heavy oil, difficulties in getting the crude oil into the pump, high friction and poor fluidity during the flow of heavy oil, and large pressure differences across the tubing above the pump. All of these problems can prevent heavy oil wells from producing normally. To solve these problems, various oilfields have adopted many heavy oil extraction technologies. One of these is the blending of light oil (light oil refers to crude oil with low viscosity). This technology mixes heavy oil and light oil before pumping, reducing the viscosity of the mixed crude oil and eliminating the aforementioned problems during pumping. Currently, the method of blending light oil involves introducing light oil into the casing of the well. The light oil flows downwards to the tail of the sucker string and mixes with the heavy oil flowing from the formation, entering the lower tailpipe of the pump and flowing upwards. During this upward flow, the blended light oil and the crude oil from the formation gradually merge to form a non-viscous crude oil, thus solving the aforementioned problems. Currently, this technology uses 76mm inner diameter tubing on the pump (determined by economic efficiency and construction equipment, and not easily changed), a 25mm diameter sucker rod, and a 55mm diameter sucker rod coupling. Its flow channel area is relatively small. Therefore, when this technology is applied to a few high-displacement wells, the aforementioned problems still exist, causing some wells to cease normal production and requiring auxiliary measures to maintain well production. These auxiliary measures increase management difficulty, increase costs, and reduce the well's production time; all three aspects negatively impact the well's economic efficiency. Summary of the Invention

[0003] The purpose of this invention is to design a heavy oil-to-light oil flow channel conversion pumping device to overcome the above-mentioned problems, ensure the normal production of heavy oil wells, reduce the difficulty of oil well management, reduce cost input, and improve the economic benefits of oil wells.

[0004] The purpose of this utility model is achieved as follows: It includes a connecting joint, a sealing joint, a sealing ring, a diverter pipe, a packer, a diverter joint, a sealing pump barrel, a sealing plunger, and an oil pump. The oil pump includes an oil pump barrel, an oil plunger, and inlet / outlet valves. The oil plunger is located inside the oil pump barrel, and the oil plunger and the oil pump barrel cooperate to form a sealing pair. The diverter joint has a central hole inside and a radial groove in the middle, which communicates with the interior of the diverter joint. A vertical flow channel is located on the side wall of the diverter joint, communicating with the upper and lower end faces of the diverter joint. The lower part of the diverter pipe connects to the upper interior of the diverter joint, and the connection is sealed. The packer is fitted outside the diverter pipe, and the lower part of the packer connects to the upper exterior of the diverter joint, maintaining a seal at the connection. An outer annular space is formed between the inner wall of the packer and the outer wall of the diverter pipe. The upper part of the diverter pipe has a sealing joint, and the connecting joint is fitted inside the sealing pump barrel. After sealing, its lower part connects to the upper part of the packer. The connecting joint has a connecting groove. There is a sealing ring between the inner wall of the connecting joint and the outer wall of the sealing joint. The sealing ring seals the gap between the inner wall of the connecting joint and the outer wall of the sealing joint. The sealing point is located above the connecting groove, so that the fluid flowing out from the vertical flow channel can only flow out through the connecting groove. The upper part of the sealing pump barrel is connected to the lower interior of the diverter joint. The connection is kept sealed. The sealing plunger is inserted into the sealing pump barrel. An inner annulus is formed between the sealing plunger and the inner wall of the diverter pipe. The upper end of the inner annulus is connected to the upper part of the connecting joint. The sealing plunger and the sealing pump barrel cooperate to form a sealing pair, so that the inner annulus can only communicate with the radial groove. The lower part of the sealing plunger is connected to the oil pump plunger in the oil pump. The upper part of the oil pump barrel of the oil pump is connected to the lower part of the diverter joint. The connection is kept sealed. The fluid pumped out by the oil pump can only flow out through the connecting groove.

[0005] The beneficial effects of this utility model are as follows: This utility model is installed on the oil pumping tubing string. The added thin oil flows downward through the oil pipe on the pump. After mixing with the produced heavy oil below the pump, the added thin oil is pumped out into the casing by the oil pump. The mixture flows out from the casing. The casing has a large inner diameter and a large flow area, resulting in low oil flow resistance and unobstructed flow channels, preventing flow channel blockage. The oil pipe on the pump contains thin oil, and the sucker rod on the pump does not come into contact with the heavy oil, eliminating the problem of difficulty in the sucker rod descending. Therefore, this utility model overcomes the problems existing in the prior art, ensures normal production of heavy oil wells, reduces the difficulty of oil well management, reduces costs, and has significant economic benefits. Attached Figure Description

[0006] Appendix Figure 1 This is an assembly drawing of this utility model. Detailed Implementation

[0007] The following is in conjunction with the appendix Figure 1 The embodiments of this utility model will be described.

[0008] like Figure 1 As shown, the embodiment of this utility model includes a connecting joint 1, a sealing joint 2, a sealing ring 3, a diverter pipe 4, a packer 5, a diverter joint 6, a sealing pump barrel 7, a sealing plunger 8, and an oil pump 9. The oil pump 9 includes an oil pump barrel, an oil plunger, and inlet / outlet valves. The oil plunger is located inside the oil pump barrel, and the oil plunger and the oil pump barrel cooperate to form a sealing pair. The diverter joint 6 has a central through hole inside, and a radial groove 6-1 in the middle of the diverter joint 6. -1 communicates with the interior of the diversion joint 6. The diversion joint 6 has a vertical flow channel 6-2 on its side wall. The vertical flow channel 6-2 communicates with the upper and lower end faces of the diversion joint 6. The lower part of the diversion pipe 4 is connected to the upper interior of the diversion joint 6, and the connection is kept sealed. The packer 5 is fitted outside the diversion pipe 4. The lower part of the packer 5 is connected to the upper exterior of the diversion joint 6, and the connection is kept sealed. An outer annular space 5-1 is formed between the inner wall of the packer 5 and the outer wall of the diversion pipe 4. The upper part of the diversion pipe 4 has a sealing joint 2 ( Figure 1 The sealing joint 2 is threadedly connected to the upper part of the diversion pipe 4 (the connection is sealed). After the connecting joint 1 is fitted onto the sealing joint 2, its lower part is connected to the upper part of the packer 5. The connecting joint 1 has a connecting groove 1-1. There is a sealing ring 3 between the inner wall of the connecting joint 1 and the outer wall of the sealing joint 2. The sealing ring 3 seals the gap between the inner wall of the connecting joint 1 and the outer wall of the sealing joint 2. The sealing point is located above the connecting groove 1-1, so that the fluid flowing out from the vertical flow channel 6-2 can only flow out through the connecting groove 1-1. The upper part of the sealing pump cylinder 7 is connected to the lower interior of the diversion joint 6. The connection is kept sealed. The sealing plunger 8 is inserted into the sealing pump barrel 7. An inner annular space 4-1 is formed between the sealing plunger 8 and the inner wall of the diversion pipe 4. The upper end of the inner annular space 4-1 is connected to the upper part of the connecting joint 1. The sealing plunger 8 and the sealing pump barrel 7 cooperate to form a sealing pair, so that the lower end of the inner annular space 4-1 can only be connected to the radial groove 6-1. The lower part of the sealing plunger 8 is connected to the oil pump plunger in the oil pump 9. The upper part of the oil pump barrel of the oil pump 9 is connected to the lower part of the diversion joint 6. The connection is kept sealed, and the fluid pumped out by the oil pump 9 can only flow out through the connecting groove 1-1.

[0009] The oil pump 9 is an existing oil pump (it can be a conventional pump, a heavy oil pump, a feedback pump, or an offset valve pump). The stroke of the sealing pair formed by the sealing plunger 8 and the sealing pump barrel 7 is greater than the stroke of the oil pump 9.

[0010] This invention is installed inside the casing of the wellbore above and below the pumping tubing string. A tailpipe of a certain length is connected below the pumping pump 9. A mixer is installed below the tailpipe. After the packer 5 is set, the casing is sealed. The mixed thin oil flows downward from the tubing above the pump, through the inner annulus 4-1, and through the radial groove 6-1 to the casing below the packer 5. At the bottom of the tailpipe below the pump, it merges with the produced fluid flowing from the formation and flows upward into the tailpipe. During the upward flow, it merges into one fluid, achieving a fluid that can flow normally. The mixed fluid flows to the pumping pump 9 and is extracted. It then flows through the vertical flow channel 6-2, the outer annulus 5-1, and the connecting groove 1-1 to the casing above the packer 5 for extraction. The casing has a large inner diameter and a large flow area, resulting in low oil flow resistance and unobstructed flow channels, preventing flow channel blockage. The oil pipe on the pump contains light oil (the sucker rod on the pump is connected to the sealing plunger). The sucker rod on the pump does not come into contact with heavy oil, and the friction between the sucker rod and the light oil is small, eliminating the problem of difficulty in the sucker rod descending.

Claims

1. A heavy oil-to-light oil flow channel conversion pumping device, comprising a connecting joint (1), a sealing joint (2), a sealing ring (3), a diverter pipe (4), a packer (5), a diverter joint (6), a sealing pump barrel (7), a sealing plunger (8), and a pumping pump (9), wherein the pumping pump (9) comprises a pumping pump barrel, a pumping plunger, and inlet / outlet valves, wherein the pumping plunger is located inside the pumping pump barrel, and the pumping plunger and the pumping pump barrel cooperate to form a sealing pair, characterized in that: The diverter (6) has a central hole inside and a radial groove (6-1) in the middle of the diverter (6). The radial groove (6-1) communicates with the interior of the diverter (6). The diverter (6) has a vertical flow channel (6-2) on its side wall. The vertical flow channel (6-2) communicates with the upper and lower end faces of the diverter (6). The lower part of the diverter pipe (4) is connected to the upper interior of the diverter (6). The connection is sealed. The packer (5) is fitted outside the diverter pipe (4). The lower part is connected to the upper outside of the diversion joint (6), and the connection is kept sealed. An outer annular space (5-1) is formed between the inner wall of the packer (5) and the outer wall of the diversion pipe (4). The upper part of the diversion pipe (4) has a sealing joint (2). After the connecting joint (1) is fitted onto the sealing joint (2), its lower part is connected to the upper part of the packer (5). The connecting joint (1) has a connecting groove (1-1). There is a sealing ring (3) between the inner wall of the connecting joint (1) and the outer wall of the sealing joint (2). The sealing ring (3) seals the connection. The gap between the inner wall of the through connector (1) and the outer wall of the sealing connector (2) is such that the sealing point is located above the connecting groove (1-1), so that the fluid flowing out from the vertical flow channel (6-2) can only flow out through the connecting groove (1-1). The upper part of the sealing pump cylinder (7) is connected to the lower interior of the diverter connector (6), and the connection is kept sealed. The sealing plunger (8) is inserted into the sealing pump cylinder (7), and an inner annular space (4-1) is formed between the sealing plunger (8) and the inner wall of the diverter pipe (4). The upper end of the annulus (4-1) is connected to the upper part of the connecting joint (1). The sealing plunger (8) and the sealing pump barrel (7) cooperate to form a sealing pair, so that the inner annulus (4-1) can only communicate with the radial groove (6-1). The lower part of the sealing plunger (8) is connected to the oil pump plunger in the oil pump (9). The upper part of the oil pump barrel of the oil pump (9) is connected to the lower part of the diverter (6). The connection is sealed, and the fluid pumped out by the oil pump (9) can only flow out through the connecting groove (1-1).

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